CN106313227A - Mildew-proof enhancing fast-growing wood modifier with additional Chinese herb extracts - Google Patents

Abstract

The invention discloses a mildew-proof enhancing fast-growing wood modifier with additional Chinese herb extracts. The mildew-proof enhancing fast-growing wood modifier is prepared from the following raw materials including, by weight, 3-3.5 parts of formaldehyde, 2-3 parts of urea, 1.5-2 parts of hexamine, 0.02-0.03 part of maleic anhydride, an appropriate amount of acetic acid, an appropriate amount of ammonium hydroxide, an appropriate amount of deionized water, 20-23 parts of dimethylol dihydroxy ethylene urea with the solid content being 42wt%, 1.5-2 parts of magnesium chloride hexahydrate, 10-11 parts of silica sol, 6-7 parts of formic acid solution with the concentration being 88wt%, 3-4 parts of pericarpium citri reticulatae, 3.5-4.5 parts of folium artemisiae argyi, 4-5 parts of agastache rugosus, 1.2-1.5 parts of ACQ preservative and an appropriate amount of absolute ethyl alcohol. The mildew-proof enhancing fast-growing wood modifier can permeate into wood and further form a layer of protective film on the surface of the wood, so that the effects of resisting water, dampness and mildew are achieved, corrosion caused by mildew is prevented, the service life of the wood is prolonged, and the using requirement for outdoor furniture wood apparatuses can be met.

Description

A kind of mildew-resistant adding Chinese herbal medicine extract strengthens fast growing wood modifying agent

Technical field

The present invention relates to Wood Property Improvement field, particularly relate to a kind of mildew-resistant adding Chinese herbal medicine extract and strengthen fast-growing Wood modifier.

Background technology

Timber and wood materials, as the important means of production in social and economic construction, are not only widely used in daily life In every field, be also widely used for the industrial circles such as traffic, building and space flight.Along with in world wide, the forest reserves are day by day Shortage, particularly precious timber quantity falls sharply day by day, and the most substantial amounts of quick growing species of trees is widely cultivated and meets in global range Wood supply.Compared with natural forest, the quick growing species of trees is limited by factors such as growth year are short, causes early that late wood's difference is very Greatly, material is loosened, and mechanical property is poor, so not being difficult to be used in the economic height such as Furniture manufacture by the artificial fast-growing woods timber of process Added value field.Owing to timber is a kind of natural to have porous macromolecular material, shapes little by different fire and Bu Tong company The tubular units of understanding and considerate condition is cross-linked and forms, and has fluid-pervious, and its distinctive vesicular texture is that Wooden modifying carries Supply basis.Fast-growing forest is carried out physically or chemically modification, not only increases the economic value added of fast-growing forest, also Serve the effect of protection rare tree resource.Wooden modifying refers to utilize physics, the method such as chemical and mechanical to logs of wood Carry out manufacturability process, make the physico-mechanical propertieses etc. such as density of wood, hardness, intensity and dimensional stability obtain good changing Kind.Chemical modification is the Main Means that fast-growing forest is modified, wherein the selection of the chemical impregnation medicinal liquid in modifying process and dipping The drying process of material is the research emphasis of Chinese scholars.But it is as the raising of living standards of the people and the increasing of environmental consciousness By force, to human health angle, how reducing chemical impregnation medicinal liquid in the residual of modified material is chemical modification fast-growing forest Urgent problem, the most how by fast-growing forest functionalization improvement Study on Integration towards environmental protection and functionalization to be The new direction that this paper and from now on fast-growing forest are modified.

By low point of autonomous synthesis in " composite modifier is to quick growth poplar wood and Chinese toon wood Modification effect and study mechanism " literary composition Son modified nitrogen footpath methyl performed polymer is combined with hydroxymethyl-2 dihydroxy-ethylene urea, makes many merits by adding plurality of stable agent Can type chemical modifier, the timber physicochemical property after before modified and mechanism of modification have been carried out preliminary study, have passed through impregnation drying The main mechanical strength improving effect of the modified material after process is obvious, and heat stability is improved, and modifying agent is impregnated into wood simultaneously When material is internal, self-condensation effect can be occurred to form tridimensional network, it is higher that modifying agent serves as intensity at wood internal Implant is especially the most obvious to dimensional stability and mechanical property improvement result.Although modified fast growing wood is at mechanics Increase in performance, but owing to it has significantly affected fast growing wood furniture out of doors, open air not to absorptive reduction The application of wood clothing arts, needs to be modified its composite modifier further, it is also desirable to can have other additional properties To meet the demand to fast growing wood such as outdoor furniture.

Summary of the invention

The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of mildew-resistant adding Chinese herbal medicine extract increases Strong fast growing wood modifying agent.

The present invention is achieved by the following technical solutions:

A kind of mildew-resistant adding Chinese herbal medicine extract strengthens fast growing wood modifying agent, is made up of the raw material of following weight portion: Formaldehyde 3-3.5, carbamide 2-3, hexamethylenetetramine 1.5-2, maleic anhydride 0.02-0.03, acetic acid is appropriate, ammonia is appropriate, go from Sub-water is appropriate, solid content is the hydroxymethyl-2 dihydroxy-ethylene urea 20-23 of 42wt%, Magnesium dichloride hexahydrate 1.5-2, Ludox 10- 11, concentration be the formic acid solution 6-7 of 88wt%, Pericarpium Citri Reticulatae 3-4, Folium Artemisiae Argyi 3.5-4.5, Herba Pogostemonis 4-5, ACQ preservative 1.2-1.5, anhydrous Appropriate amount of ethanol.

Described a kind of mildew-resistant adding Chinese herbal medicine extract strengthens fast growing wood modifying agent, is made up of step in detail below:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to the most molten while stirring Solving, add the deionized water of total amount 1.5-2 times amount, be heated to 70-80 DEG C, stirring reaction was adjusted with acetic acid and ammonia after 3-4 hour Joint pH value is 7, terminates reaction；

(2) Pericarpium Citri Reticulatae, Folium Artemisiae Argyi, Herba Pogostemonis are put into and be ground into little granule in pulverizer, be then placed in the anhydrous second of total amount 30-35 times amount In alcohol, being heated to 40-50 DEG C and soak filter cleaner after 3-4 hour, filtrate put in microwave oven, the power with 500-550W is micro- Wave heating 30-40 minute, the 10-15% concentrating the filtrate to former filtrate is stand-by；The formic acid solution that concentration is 88wt% is prevented with ACQ Rotten agent mixing, adds the deionized water of total amount 6-8 times amount, stirs and mix with above-mentioned concentrated filtrate, with 300-after being completely dissolved The speed stirring of 400 turns/part obtains mildew-resistant synergist for 10-15 minute；

(3) hydroxymethyl-2 dihydroxy-ethylene urea that solid content is 42wt% is mixed with Ludox, with the speed of 500-600 rev/min Add product and remaining residual components that step (1) step (2) obtains after stirring 10-15 minute, continue ultrasonic disperse 15-20 Minute, to obtain final product.

The invention have the advantage that formaldehyde, carbamide, hexamethylenetetramine are carried out reaction life by certain technique by the present invention Become performed polymer, then by compounding with hydroxymethyl-2 dihydroxy-ethylene urea, Ludox, magnesium chloride, can after supersound process To form colloidal sol type composite modifier, wherein modifier system is played Stabilization by Si-0-Si framing structure, by timber Carry out impregnation process, timber pickling degree of modification can be significantly improved, improve the rate of body weight gain of timber；Composite modifier can be at wood Material dipping process is well scattered in the cell wall microcellular structure of timber, with Wood chemical composition in heat drying subsequently In cellulose, hemicellulose, lignin etc. there is situ-gel polyreaction, chemical reaction finally makes the sense between them Group can connect formation covalent bond, and covalent bond is very firm, thus the modified bending strength of fast growing wood, Deflection Modulus of Elasticity and Parallel-to-grain compressive strength all improves a lot；Simultaneously composite modifier can also with the main chemical compositions cellulose of timber, half Cellulose and lignin generation etherification reaction, such reaction can reduce hydrophilic hydroxy group in timber, thus significantly reduce wood Material hygroscopicity.

Extract, by extracting Pericarpium Citri Reticulatae, Folium Artemisiae Argyi, Herba Pogostemonis, is then compounded by the present invention with formic acid, ACQ preservative, The growth of the mycetes such as aspergillus niger can be suppressed, thus there is good anti-mold effect；The modifying agent stable storage that the present invention makes Property good, raw material sources are simple, safety non-toxic, and technique is simple, are suitable for Produce on a large scale, are dipped into processing fast growing wood, modified Agent can penetrate into wood internal, and can form layer protecting film at wood surface, play waterproof, moistureproof, Effect of mildew-resistant, the corruption that preventing goes mouldy causes, improve the service life of timber, improve the surcharge of fast growing wood, The use demand of the wooden equipment of outdoor furniture can be met.

Detailed description of the invention

A kind of mildew-resistant adding Chinese herbal medicine extract strengthens fast growing wood modifying agent, by the raw material of following weight portion (kilogram) Preparation is made: formaldehyde 3, carbamide 2, hexamethylenetetramine 1.5, maleic anhydride 0.02, acetic acid is appropriate, ammonia is appropriate, deionized water In right amount, solid content is that the hydroxymethyl-2 dihydroxy-ethylene urea 20 of 42wt%, Magnesium dichloride hexahydrate 1.5, Ludox 10, concentration are The formic acid solution 6 of 88wt%, Pericarpium Citri Reticulatae 3, Folium Artemisiae Argyi 3.5, Herba Pogostemonis 4, ACQ preservative 1.2, dehydrated alcohol are appropriate.

Described a kind of mildew-resistant adding Chinese herbal medicine extract strengthens fast growing wood modifying agent, is made up of step in detail below:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to the most molten while stirring Solving, add the deionized water of total amount 1.5 times amount, be heated to 70 DEG C, stirring reaction regulates pH value with acetic acid and ammonia after 3 hours and is 7, terminate reaction；

(2) Pericarpium Citri Reticulatae, Folium Artemisiae Argyi, Herba Pogostemonis are put into and be ground into little granule in pulverizer, be then placed in the dehydrated alcohol of total amount 30 times amount In, it is heated to 40 DEG C and soaks filter cleaner after 3 hours, filtrate is put in microwave oven, heat 30 points with the power microwave of 500W Clock, concentrates the filtrate to the 10% stand-by of former filtrate；The formic acid solution that concentration is 88wt% is mixed with ACQ preservative, adds total Measure the deionized water of 6 times amount, stir and mix with above-mentioned concentrated filtrate after being completely dissolved, stir 10 points with the speed of 300 turns/part Clock obtains mildew-resistant synergist；

(3) hydroxymethyl-2 dihydroxy-ethylene urea that solid content is 42wt% is mixed with Ludox, stir with the speed of 500 revs/min Add product and remaining residual components that step (1) step (2) obtains after 10 minutes, continue ultrasonic disperse 15 minutes, to obtain final product.

Fast growing wood is processed into the veneer of certain specification, and being dried to moisture content is 6-10%, puts into vacuum pressure impregnation In tank, after being evacuated to-0.01MPa, keep 30-40 minute, be then rapidly injected modifying agent of the present invention, continue to keep 40-50 Minute, it is forced into 0.89-0.9 MPa afterwards and keeps 15-20 minute；After being taken out by sheet material, environment air dry disposed within is to aqueous Rate is less than 30%, is then placed in baking oven, is first dried 6-8 hour at 80-90 DEG C, then solidifies 4-5 hour at 120-130 DEG C, cold But after, discharging obtains modified fast growing wood.Modified fast growing wood is compared with unmodified timber, Absolute Dry Density Improve 67.1%, bending strength improves 63.0%, and parallel-to-grain compressive strength improves 15.5%, and whole water absorption rate reduces 32.9%.

Claims (2)

1. the mildew-resistant adding Chinese herbal medicine extract strengthens fast growing wood modifying agent, it is characterised in that by following weight portion Raw material is made: formaldehyde 3-3.5, carbamide 2-3, hexamethylenetetramine 1.5-2, maleic anhydride 0.02-0.03, acetic acid is appropriate, Ammonia is appropriate, deionized water is appropriate, solid content is 42wt% hydroxymethyl-2 dihydroxy-ethylene urea 20-23, Magnesium dichloride hexahydrate 1.5-2, Ludox 10-11, concentration are the formic acid solution 6-7 of 88wt%, Pericarpium Citri Reticulatae 3-4, Folium Artemisiae Argyi 3.5-4.5, Herba Pogostemonis 4-5, ACQ are anti- Rotten agent 1.2-1.5, dehydrated alcohol are appropriate.

A kind of mildew-resistant adding Chinese herbal medicine extract strengthens fast growing wood modifying agent, and its feature exists In, it is made up of step in detail below:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to the most molten while stirring Solving, add the deionized water of total amount 1.5-2 times amount, be heated to 70-80 DEG C, stirring reaction was adjusted with acetic acid and ammonia after 3-4 hour Joint pH value is 7, terminates reaction；

(2) Pericarpium Citri Reticulatae, Folium Artemisiae Argyi, Herba Pogostemonis are put into and be ground into little granule in pulverizer, be then placed in the anhydrous second of total amount 30-35 times amount In alcohol, being heated to 40-50 DEG C and soak filter cleaner after 3-4 hour, filtrate put in microwave oven, the power with 500-550W is micro- Wave heating 30-40 minute, the 10-15% concentrating the filtrate to former filtrate is stand-by；The formic acid solution that concentration is 88wt% is prevented with ACQ Rotten agent mixing, adds the deionized water of total amount 6-8 times amount, stirs and mix with above-mentioned concentrated filtrate, with 300-after being completely dissolved The speed stirring of 400 turns/part obtains mildew-resistant synergist for 10-15 minute；

(3) hydroxymethyl-2 dihydroxy-ethylene urea that solid content is 42wt% is mixed with Ludox, with the speed of 500-600 rev/min Add product and remaining residual components that step (1) step (2) obtains after stirring 10-15 minute, continue ultrasonic disperse 15-20 Minute, to obtain final product.