CN113414851B - Resin impregnation functional wood and processing technology - Google Patents
Resin impregnation functional wood and processing technology Download PDFInfo
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- CN113414851B CN113414851B CN202110629329.4A CN202110629329A CN113414851B CN 113414851 B CN113414851 B CN 113414851B CN 202110629329 A CN202110629329 A CN 202110629329A CN 113414851 B CN113414851 B CN 113414851B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/025—Controlling the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/36—Aliphatic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/38—Aromatic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/38—Aromatic compounds
- B27K3/42—Aromatic compounds nitrated, or nitrated and halogenated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/50—Mixtures of different organic impregnating agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/15—Decontamination of previously treated wood
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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Abstract
The invention discloses a resin impregnation functional wood and a processing technology, wherein the formula comprises the following components: the wood product comprises finished wood, water-soluble low-molecular-weight phenolic resin, a defoaming agent, an aldehyde eliminating agent, a dispersing agent, a coupling agent, an insect-resist agent and a curing agent; the weight portions of the components are as follows: 82-90 parts of finished timber, 40-48 parts of water-soluble low molecular weight phenolic resin, 1-3 parts of defoamer, 5-9 parts of formaldehyde scavenger, 2-4 parts of dispersant, 1-3 parts of coupling agent, 6-10 parts of insect repellent and 1-3 parts of curing agent; the invention thoroughly removes redundant gas in wood pores by ultrasonic impregnation and vacuum rolling, accelerates the impregnation speed of resin, has uniform diffusion and full reaction, shortens the modification time of wood, improves the functional improvement effect of wood, and carries out formaldehyde elimination treatment on the resin, thereby ensuring the physical health of personnel, reducing the pollution to the environment and ensuring the diffusion degree of the resin in the wood pores.
Description
Technical Field
The invention relates to the technical field of wood, in particular to resin impregnation functionalized wood and a processing technology.
Background
Wood is a natural renewable porous polymer material, is a green ecological environment-friendly material, is popular for a long time, and is widely applied to building and furniture materials, interior decoration, papermaking and the like. However, under the background of complete deforestation of natural forest and contradiction and tension of wood supply and demand, the wood of artificial forest is inflammable, perishable, easy to absorb moisture, easy to be damaged by worms, easy to deform, small in diameter grade and the like, so that the application range of the wood is limited to a great extent. Therefore, researchers at home and abroad adopt various physical, chemical and biological methods to functionally improve the wood, so as to obtain the wood-based composite material with excellent performance. At present, the method of impregnating wood with water-soluble low molecular weight resin is mainly adopted in the market to improve the functionalization performance.
However, most of the existing resin impregnated functionalized wood has the following problems: firstly, the resin impregnation speed is slow, the modification time is long, the resin diffusion uniformity is poor, and the functional improvement effect of the wood is inevitably influenced; secondly, formaldehyde is not removed from the resin, the volatilization amount of free formaldehyde is more in the processing process, the physical health of personnel is endangered, a certain environmental pollution is caused, and the diffusion degree of the resin in wood pores is influenced in the volatilization process; thirdly, the wood with improved functionality is poor in insect-proof performance, microorganisms such as bacteria and diseases are easy to breed in the using process, the insect-proof risk is high, and the service life of the wood is inevitably influenced.
Disclosure of Invention
The invention aims to provide resin impregnation functionalized wood and a processing technology, and aims to solve the problems of uneven resin diffusion, high free formaldehyde content and high risk of worm damage in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the resin impregnation functional wood comprises the following components in percentage by weight: the wood product comprises finished wood, water-soluble low-molecular-weight phenolic resin, a defoaming agent, an aldehyde eliminating agent, a dispersing agent, a coupling agent, an insect-resist agent and a curing agent; the weight portions of the components are as follows: 82-90 parts of finished timber, 40-48 parts of water-soluble low molecular weight phenolic resin, 1-3 parts of defoamer, 5-9 parts of formaldehyde scavenger, 2-4 parts of dispersant, 1-3 parts of coupling agent, 6-10 parts of insect repellent and 1-3 parts of curing agent.
Preferably, the water-soluble low molecular weight phenolic resin is prepared by mixing phenol, formaldehyde and sodium hydroxide in a molar ratio of 1:2.1:0.1, and the pH value is adjusted to 5.8.
Preferably, the formaldehyde scavenger is prepared by mixing urea, semicarbazide, hydrogen peroxide and hypochlorous acid, and the weight ratio of the urea, the semicarbazide, the hydrogen peroxide and the hypochlorous acid is 2:1:3:2.
Preferably, the insect repellent is prepared by mixing cyanoethervalerate, abamectin and chlorantraniliprole, and the weight ratio of the cyanoethervalerate to the abamectin to the chlorantraniliprole is 2:1:2.
The processing technology of the resin impregnated functional wood comprises the following steps: firstly, taking materials; step two, eliminating aldehyde; step three, dipping; step four, rolling; step five, drying; step six, quality inspection;
in the first step, 82-90 parts of finished timber, 40-48 parts of water-soluble low molecular weight phenolic resin, 1-3 parts of defoamer, 5-9 parts of formaldehyde scavenger, 2-4 parts of dispersant, 1-3 parts of coupling agent, 6-10 parts of insect repellent and 1-3 parts of curing agent are respectively weighed according to the parts by weight of each component for standby;
pouring the water-soluble low-molecular-weight phenolic resin prepared in the first step into a container, placing the container on a magnetic stirrer, slowly adding the formaldehyde eliminating agent prepared in the first step while stirring, uniformly mixing, heating and preserving heat to fully react free formaldehyde to convert into harmless substances such as formic acid and the like, and obtaining formaldehyde eliminating resin liquid;
in the third step, the finished timber prepared in the first step is put into an ultrasonic dispersing machine, the formaldehyde-removing resin liquid obtained in the second step, the dispersing agent, the coupling agent, the insect repellent and the curing agent prepared in the first step are added, the formaldehyde-removing resin liquid is uniformly diffused in the pores of the finished timber by utilizing ultrasonic oscillation, and impregnated timber and resin residual liquid are obtained after full reaction;
in the fourth step, the impregnated timber obtained in the third step and the resin residual liquid are put into a vacuum roller press together, the defoamer prepared in the first step is added, the roller press is rolled and vacuumized, the circulation is carried out for a plurality of times, and redundant gas in the impregnated timber and the resin residual liquid is removed until the resin residual liquid is completely filled in the pores of the impregnated timber, so that the rolled timber is obtained;
in the fifth step, the rolled timber obtained in the fourth step is placed into an electric heating drying box, and is heated at the first stage, then is dried at the heat preservation, and is dried at the final stage, so that the redundant moisture in the rolled timber is completely converted into water vapor, and is discharged into an exhaust gas treatment system, and the dry timber is left;
and in the step six, the dry timber obtained in the step five is placed on a quality inspection table, performance detection is carried out by using a corresponding instrument according to production requirements, and the resin impregnated functional timber is obtained after rejecting the timber which does not meet the production requirements and leaving the timber which meets the production requirements.
Preferably, in the second step, the stirring speed of the magnetic stirrer is 18-24 r/min, the stirring time is 8-13 min, the heating temperature is 65-70 ℃, and the heat preservation time is 15-22 min.
Preferably, in the third step, the working frequency of the ultrasonic dispersing machine is 5-14 kHz, and the dispersing time is 6-9 min.
Preferably, in the fourth step, the vacuum pressure of the vacuum roll squeezer is 0.007 to 0.011Pa, the roll pressure is 2.5 to 3.1MPa, and the cycle times are 3 to 5 times.
Preferably, in the fifth step, the initial heating temperature is 57-63 ℃, the initial heat preservation time is 6-8 h, the final heating temperature is 80-85 ℃, and the final heat preservation time is 10-12 h.
Compared with the prior art, the invention has the beneficial effects that: the resin impregnation functional wood formula and the process have the advantages of uniform resin diffusion, low free formaldehyde content and low risk of worm damage;
(1) By adopting the ultrasonic impregnation and vacuum rolling treatment process, the redundant gas in the wood pores is thoroughly removed, the impregnation speed of the resin is accelerated, the resin is uniformly diffused and fully reacted, the modification time of the wood is shortened, and the functional improvement effect of the wood is improved;
(2) The formaldehyde elimination treatment is carried out on the resin by using urea, semicarbazide, hydrogen peroxide and hypochlorous acid, so that the volatilization amount of free formaldehyde in the processing process is reduced, the physical health of personnel is ensured, the pollution to the environment is reduced, and the diffusion degree of the resin in wood pores is ensured;
(3) By adding the insect repellent prepared from cyanoethervalerate, abamectin and chlorantraniliprole, the insect-repellent performance of the wood is enhanced, the breeding of microorganisms such as bacteria, diseases and insects is inhibited, the insect-repellent risk of the wood is reduced, and the service life of the wood is prolonged.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution:
example 1:
the resin impregnation functional wood comprises the following components in percentage by weight: the wood product comprises finished wood, water-soluble low-molecular-weight phenolic resin, a defoaming agent, an aldehyde eliminating agent, a dispersing agent, a coupling agent, an insect-resist agent and a curing agent; the weight portions of the components are as follows: 82-90 parts of finished timber, 40-48 parts of water-soluble low molecular weight phenolic resin, 1-3 parts of defoamer, 5-9 parts of formaldehyde scavenger, 2-4 parts of dispersing agent, 1-3 parts of coupling agent, 6-10 parts of insect repellent and 1-3 parts of curing agent, wherein the water-soluble low molecular weight phenolic resin is prepared by mixing phenol, formaldehyde and sodium hydroxide in a molar ratio of 1:2.1:0.1, the pH value is adjusted to 5.8, the formaldehyde scavenger is prepared by mixing urea, semicarbazide, hydrogen peroxide and hypochlorous acid, the weight ratio of urea, semicarbazide, hydrogen peroxide and hypochlorous acid is 2:1:3:2, the insect repellent is prepared by mixing cyanovalerate, abamectin and chlorantraniliprole, and the weight ratio of cyanovalerate, abamectin and chlorantraniliprole is 2:1:2.
The processing technology of the resin impregnated functional wood comprises the following steps: firstly, taking materials; step two, eliminating aldehyde; step three, dipping; step four, rolling; step five, drying; step six, quality inspection;
in the first step, 82 parts of finished timber, 40 parts of water-soluble low-molecular-weight phenolic resin, 1 part of defoamer, 5 parts of formaldehyde scavenger, 2 parts of dispersant, 1 part of coupling agent, 6 parts of insect-resist agent and 1 part of curing agent are respectively weighed according to the parts by weight of the components for later use;
pouring the water-soluble low molecular weight phenolic resin prepared in the first step into a container, placing the container on a magnetic stirrer, slowly adding the aldehyde eliminating agent prepared in the first step while stirring for 8-13 min at 18-24 r/min, heating and preserving heat for 15-22 min at 65-70 ℃ after uniformly mixing, and fully reacting free formaldehyde to convert into harmless substances such as formic acid and the like to obtain aldehyde eliminating resin liquid;
in the third step, the finished timber prepared in the first step is put into an ultrasonic dispersing machine with the frequency of 5-14 kHz, the formaldehyde-removing resin liquid obtained in the second step, the dispersing agent, the coupling agent, the insect-resist agent and the curing agent prepared in the first step are added, the formaldehyde-removing resin liquid is uniformly diffused in the pores of the finished timber by utilizing ultrasonic oscillation for 6-9 min, and impregnated timber and resin residual liquid are obtained after full reaction;
in the fourth step, the impregnated timber and the resin residual liquid obtained in the third step are put into a vacuum roller press together, the defoamer prepared in the first step is added, the mixture is rolled under 2.5-3.1 MPa and vacuumized under 0.007-0.011 Pa, and the mixture is circulated for 3-5 times, so that redundant gases in the impregnated timber and the resin residual liquid are removed until the resin residual liquid is completely filled in the pores of the impregnated timber, and the rolled timber is obtained;
in the fifth step, the rolled timber obtained in the fourth step is put into an electric heating drying oven, firstly heated at the first stage of 57-63 ℃ and then dried for 6-8 hours in a heat preservation way, and then heated at the final stage of 80-85 ℃ and then dried for 10-12 hours in a heat preservation way, so that the redundant moisture in the rolled timber is completely converted into water vapor and is discharged into an exhaust gas treatment system, and the dry timber is left;
and in the step six, the dry timber obtained in the step five is placed on a quality inspection table, performance detection is carried out by using a corresponding instrument according to production requirements, and the resin impregnated functional timber is obtained after rejecting the timber which does not meet the production requirements and leaving the timber which meets the production requirements.
Example 2:
the resin impregnation functional wood comprises the following components in percentage by weight: the wood product comprises finished wood, water-soluble low-molecular-weight phenolic resin, a defoaming agent, an aldehyde eliminating agent, a dispersing agent, a coupling agent, an insect-resist agent and a curing agent; the weight portions of the components are as follows: 82-90 parts of finished timber, 40-48 parts of water-soluble low molecular weight phenolic resin, 1-3 parts of defoamer, 5-9 parts of formaldehyde scavenger, 2-4 parts of dispersing agent, 1-3 parts of coupling agent, 6-10 parts of insect repellent and 1-3 parts of curing agent, wherein the water-soluble low molecular weight phenolic resin is prepared by mixing phenol, formaldehyde and sodium hydroxide in a molar ratio of 1:2.1:0.1, the pH value is adjusted to 5.8, the formaldehyde scavenger is prepared by mixing urea, semicarbazide, hydrogen peroxide and hypochlorous acid, the weight ratio of urea, semicarbazide, hydrogen peroxide and hypochlorous acid is 2:1:3:2, the insect repellent is prepared by mixing cyanovalerate, abamectin and chlorantraniliprole, and the weight ratio of cyanovalerate, abamectin and chlorantraniliprole is 2:1:2.
The processing technology of the resin impregnated functional wood comprises the following steps: firstly, taking materials; step two, eliminating aldehyde; step three, dipping; step four, rolling; step five, drying; step six, quality inspection;
in the first step, 86 parts of finished timber, 44 parts of water-soluble low-molecular-weight phenolic resin, 2 parts of defoamer, 7 parts of formaldehyde scavenger, 3 parts of dispersant, 2 parts of coupling agent, 8 parts of insect-resist agent and 2 parts of curing agent are respectively weighed according to the parts by weight of the components for standby;
pouring the water-soluble low molecular weight phenolic resin prepared in the first step into a container, placing the container on a magnetic stirrer, slowly adding the aldehyde eliminating agent prepared in the first step while stirring for 8-13 min at 18-24 r/min, heating and preserving heat for 15-22 min at 65-70 ℃ after uniformly mixing, and fully reacting free formaldehyde to convert into harmless substances such as formic acid and the like to obtain aldehyde eliminating resin liquid;
in the third step, the finished timber prepared in the first step is put into an ultrasonic dispersing machine with the frequency of 5-14 kHz, the formaldehyde-removing resin liquid obtained in the second step, the dispersing agent, the coupling agent, the insect-resist agent and the curing agent prepared in the first step are added, the formaldehyde-removing resin liquid is uniformly diffused in the pores of the finished timber by utilizing ultrasonic oscillation for 6-9 min, and impregnated timber and resin residual liquid are obtained after full reaction;
in the fourth step, the impregnated timber and the resin residual liquid obtained in the third step are put into a vacuum roller press together, the defoamer prepared in the first step is added, the mixture is rolled under 2.5-3.1 MPa and vacuumized under 0.007-0.011 Pa, and the mixture is circulated for 3-5 times, so that redundant gases in the impregnated timber and the resin residual liquid are removed until the resin residual liquid is completely filled in the pores of the impregnated timber, and the rolled timber is obtained;
in the fifth step, the rolled timber obtained in the fourth step is put into an electric heating drying oven, firstly heated at the first stage of 57-63 ℃ and then dried for 6-8 hours in a heat preservation way, and then heated at the final stage of 80-85 ℃ and then dried for 10-12 hours in a heat preservation way, so that the redundant moisture in the rolled timber is completely converted into water vapor and is discharged into an exhaust gas treatment system, and the dry timber is left;
and in the step six, the dry timber obtained in the step five is placed on a quality inspection table, performance detection is carried out by using a corresponding instrument according to production requirements, and the resin impregnated functional timber is obtained after rejecting the timber which does not meet the production requirements and leaving the timber which meets the production requirements.
Example 3:
the resin impregnation functional wood comprises the following components in percentage by weight: the wood product comprises finished wood, water-soluble low-molecular-weight phenolic resin, a defoaming agent, an aldehyde eliminating agent, a dispersing agent, a coupling agent, an insect-resist agent and a curing agent; the weight portions of the components are as follows: 82-90 parts of finished timber, 40-48 parts of water-soluble low molecular weight phenolic resin, 1-3 parts of defoamer, 5-9 parts of formaldehyde scavenger, 2-4 parts of dispersing agent, 1-3 parts of coupling agent, 6-10 parts of insect repellent and 1-3 parts of curing agent, wherein the water-soluble low molecular weight phenolic resin is prepared by mixing phenol, formaldehyde and sodium hydroxide in a molar ratio of 1:2.1:0.1, the pH value is adjusted to 5.8, the formaldehyde scavenger is prepared by mixing urea, semicarbazide, hydrogen peroxide and hypochlorous acid, the weight ratio of urea, semicarbazide, hydrogen peroxide and hypochlorous acid is 2:1:3:2, the insect repellent is prepared by mixing cyanovalerate, abamectin and chlorantraniliprole, and the weight ratio of cyanovalerate, abamectin and chlorantraniliprole is 2:1:2.
The processing technology of the resin impregnated functional wood comprises the following steps: firstly, taking materials; step two, eliminating aldehyde; step three, dipping; step four, rolling; step five, drying; step six, quality inspection;
in the first step, 90 parts of finished timber, 48 parts of water-soluble low-molecular-weight phenolic resin, 3 parts of defoamer, 9 parts of formaldehyde scavenger, 4 parts of dispersant, 3 parts of coupling agent, 10 parts of insect-resist agent and 3 parts of curing agent are respectively weighed according to the parts by weight of the components for standby;
pouring the water-soluble low molecular weight phenolic resin prepared in the first step into a container, placing the container on a magnetic stirrer, slowly adding the aldehyde eliminating agent prepared in the first step while stirring for 8-13 min at 18-24 r/min, heating and preserving heat for 15-22 min at 65-70 ℃ after uniformly mixing, and fully reacting free formaldehyde to convert into harmless substances such as formic acid and the like to obtain aldehyde eliminating resin liquid;
in the third step, the finished timber prepared in the first step is put into an ultrasonic dispersing machine with the frequency of 5-14 kHz, the formaldehyde-removing resin liquid obtained in the second step, the dispersing agent, the coupling agent, the insect-resist agent and the curing agent prepared in the first step are added, the formaldehyde-removing resin liquid is uniformly diffused in the pores of the finished timber by utilizing ultrasonic oscillation for 6-9 min, and impregnated timber and resin residual liquid are obtained after full reaction;
in the fourth step, the impregnated timber and the resin residual liquid obtained in the third step are put into a vacuum roller press together, the defoamer prepared in the first step is added, the mixture is rolled under 2.5-3.1 MPa and vacuumized under 0.007-0.011 Pa, and the mixture is circulated for 3-5 times, so that redundant gases in the impregnated timber and the resin residual liquid are removed until the resin residual liquid is completely filled in the pores of the impregnated timber, and the rolled timber is obtained;
in the fifth step, the rolled timber obtained in the fourth step is put into an electric heating drying oven, firstly heated at the first stage of 57-63 ℃ and then dried for 6-8 hours in a heat preservation way, and then heated at the final stage of 80-85 ℃ and then dried for 10-12 hours in a heat preservation way, so that the redundant moisture in the rolled timber is completely converted into water vapor and is discharged into an exhaust gas treatment system, and the dry timber is left;
and in the step six, the dry timber obtained in the step five is placed on a quality inspection table, performance detection is carried out by using a corresponding instrument according to production requirements, and the resin impregnated functional timber is obtained after rejecting the timber which does not meet the production requirements and leaving the timber which meets the production requirements.
The resin-impregnated functionalized wood obtained in the above examples was subjected to performance test and compared with the general resin-impregnated functionalized wood on the market, and the results were shown in the following table:
| compression ratio | |
| Example 1 | 45.5％ |
| Example 2 | 48.2％ |
| Example 3 | 50.7％ |
| Comparative example | 30.8％ |
Based on the above, the formaldehyde eliminating treatment method has the advantages that urea, semicarbazide, hydrogen peroxide and hypochlorous acid are used for formaldehyde eliminating treatment on the resin, so that the volatilization amount of free formaldehyde in the processing process is reduced, the physical health of personnel is ensured, the pollution to the environment is reduced, the diffusion degree of the resin in wood pores is ensured, and the insect repellent agent prepared from cyanoethervalerate, abamectin and chlorantraniliprole is added, so that the insect-resist performance of the wood is enhanced, the breeding of microorganisms such as bacteria, diseases and insects is inhibited, the insect-resist risk of the wood is reduced, the service life of the wood is prolonged, meanwhile, the treatment process of ultrasonic impregnation and vacuum rolling is used for thoroughly removing redundant gas in the wood pores, accelerating the impregnation speed of the resin, ensuring uniform diffusion and full reaction, shortening the modification time of the wood and improving the functional improvement effect of the wood.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. A process for the processing of resin impregnated functionalized wood, the formulation of the resin impregnated functionalized wood comprising: the wood product comprises finished wood, water-soluble low-molecular-weight phenolic resin, a defoaming agent, an aldehyde eliminating agent, a dispersing agent, a coupling agent, an insect-resist agent and a curing agent; the method is characterized in that: the weight portions of the components are as follows: 82-90 parts of finished timber, 40-48 parts of water-soluble low molecular weight phenolic resin, 1-3 parts of defoamer, 5-9 parts of formaldehyde scavenger, 2-4 parts of dispersant, 1-3 parts of coupling agent, 6-10 parts of insect repellent and 1-3 parts of curing agent;
the processing technology comprises the following steps: firstly, taking materials; step two, eliminating aldehyde; step three, dipping; step four, rolling; step five, drying; step six, quality inspection;
in the first step, 82-90 parts of finished timber, 40-48 parts of water-soluble low molecular weight phenolic resin, 1-3 parts of defoamer, 5-9 parts of formaldehyde scavenger, 2-4 parts of dispersant, 1-3 parts of coupling agent, 6-10 parts of insect repellent and 1-3 parts of curing agent are respectively weighed according to the parts by weight of each component for standby;
pouring the water-soluble low-molecular-weight phenolic resin prepared in the first step into a container, placing the container on a magnetic stirrer, slowly adding the formaldehyde eliminating agent prepared in the first step while stirring, uniformly mixing, heating and preserving heat to fully react free formaldehyde to convert into formic acid harmless substances, and obtaining formaldehyde eliminating resin liquid;
in the third step, the finished timber prepared in the first step is put into an ultrasonic dispersing machine, the formaldehyde-removing resin liquid obtained in the second step, the dispersing agent, the coupling agent, the insect repellent and the curing agent prepared in the first step are added, the formaldehyde-removing resin liquid is uniformly diffused in the pores of the finished timber by utilizing ultrasonic oscillation, and impregnated timber and resin residual liquid are obtained after full reaction;
in the fourth step, the impregnated timber obtained in the third step and the resin residual liquid are put into a vacuum roller press together, the defoamer prepared in the first step is added, the roller press is rolled and vacuumized, the circulation is carried out for a plurality of times, and redundant gas in the impregnated timber and the resin residual liquid is removed until the resin residual liquid is completely filled in the pores of the impregnated timber, so that the rolled timber is obtained;
in the fifth step, the rolled timber obtained in the fourth step is placed into an electric heating drying box, and is heated at the first stage, then is dried at the heat preservation, and is dried at the final stage, so that the redundant moisture in the rolled timber is completely converted into water vapor, and is discharged into an exhaust gas treatment system, and the dry timber is left;
and in the step six, the dry timber obtained in the step five is placed on a quality inspection table, performance detection is carried out by using a corresponding instrument according to production requirements, and the resin impregnated functional timber is obtained after rejecting the timber which does not meet the production requirements and leaving the timber which meets the production requirements.
2. The process for the processing of resin impregnated functionalized wood according to claim 1, wherein: the water-soluble low molecular weight phenolic resin is prepared by mixing phenol, formaldehyde and sodium hydroxide in a molar ratio of 1:2.1:0.1, and the pH value is regulated to 5.8.
3. The process for the processing of resin impregnated functionalized wood according to claim 1, wherein: the formaldehyde eliminating agent is prepared by mixing urea, semicarbazide, hydrogen peroxide and hypochlorous acid, and the weight ratio of the urea to the semicarbazide to the hydrogen peroxide to the hypochlorous acid is 2:1:3:2.
4. The process for the processing of resin impregnated functionalized wood according to claim 1, wherein: the insect repellent is prepared by mixing cyanoethervalerate, abamectin and chlorantraniliprole, and the weight ratio of the cyanoethervalerate to the abamectin to the chlorantraniliprole is 2:1:2.
5. The process for the processing of resin impregnated functionalized wood according to claim 1, wherein: in the second step, the stirring speed of the magnetic stirrer is 18-24 r/min, the stirring time is 8-13 min, the heating temperature is 65-70 ℃, and the heat preservation time is 15-22 min.
6. The process for the processing of resin impregnated functionalized wood according to claim 1, wherein: in the third step, the working frequency of the ultrasonic dispersion machine is 5-14 kHz, and the dispersion time is 6-9 min.
7. The process for the processing of resin impregnated functionalized wood according to claim 1, wherein: in the fourth step, the vacuumizing pressure of the vacuum roll squeezer is 0.007-0.011 Pa, the rolling pressure is 2.5-3.1 MPa, and the cycle times are 3-5 times.
8. The process for the processing of resin impregnated functionalized wood according to claim 1, wherein: in the fifth step, the heating temperature of the initial stage is 57-63 ℃, the heat preservation time of the initial stage is 6-8 h, the heating temperature of the final stage is 80-85 ℃, and the heat preservation time of the final stage is 10-12 h.
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