CN109795003A - A kind of method of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen - Google Patents
A kind of method of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen Download PDFInfo
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Abstract
The invention discloses a kind of methods of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen, moso bamboo is intercepted into thick bamboo tube, it carries out cuing open piece, force plane processing growth bamboo cane, prefreezing and vacuum freeze-drying processing in vacuum freeze drier, it places into ultrasonic cell-break machine and is ultrasonically treated, it is quenched until constant mass in climatic chamber, the bamboo wood that gained is ultrasonically treated is put into the reaction chamber of cold plasma modified equipment and carries out cold plasma modified processing, again by the bamboo wood of gained modification in glutaraldehyde after impregnation, it spontaneously dries in air, gradient increased temperature in drying box is placed into solidify, it balances in air, the bamboo wood of gained impregnation is impregnated in maceration extract made of ionic liquid and polyethylene glycol, with plastic film sealing, prick multiple pores, after vacuumizing dipping in drying box, It is put into hot-pressing processing on hot press, after impregnating in deionized water, second of hot-pressing processing is carried out on hot press, is then be dried to constant weight.
Description
Technical field
The invention belongs to the field of building materials, and in particular to a kind of vacuum freeze drying-ultrasound-oxygen is cold plasma modified
The method for handling bamboo wood.
Background technique
Today of 21 century, environmental protection and the theme for innovating the new era of having stamped.Bamboo wood is as the second largest wooden resource, to pushing away
Dynamic green economy, Developing Green have precipitated huge potential and have utilized space.Bamboo wood is with its good natural sex and can be again
Natural disposition gradually pushes " bamboo Dai Mu " epoch to advance.Contemporary China is just sprung up towards the long river that beautiful China, rural area are revitalized,
To push full bamboo efficiently to utilize, the economic development of bamboo producing region is revitalized, bamboo wood protection is modified in order to which bamboo processing utilization is most important
Sport technique segment.Fungus-proof antisepsis that it is covered, fire-retardant and dyeing are directed to the permeability problems of bamboo wood, infiltrative quality
Bamboo wood protection and modified effect and bamboo value-added content of product will be directly affected.
Summary of the invention
The purpose of the present invention is being directed to existing problem, a kind of vacuum freeze drying-ultrasound-oxygen cold plasma is provided
The method of modification bamboo wood, the bamboo wood according to the processing of this method preparation have excellent surface wettability and mildew resistance
Energy.
The present invention is achieved by the following technical solutions:
A kind of method of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen, which is characterized in that including as follows
Step:
(1) bamboo wood vacuum freeze drying is handled:
5-6 setation bamboo is intercepted into thick bamboo tube, carries out cuing open piece, green de-etiolation processing growth bamboo cane is gone by force plane, by gained bamboo wood
It is placed in vacuum freeze drier, carries out prefreezing and vacuum freeze-drying processing, obtain the bamboo wood that moisture content is 85-115%；
(2) bamboo wood ultrasound-cold plasma modified processing of oxygen:
The bamboo wood of gained vacuum freeze drying processing in (1) is put into ultrasonic cell-break machine, is 55-65 DEG C of item in temperature
It is quenched in the climatic chamber that relative humidity is 45-55%, temperature is 20-25 DEG C after carrying out ultrasonic treatment 60-90min under part
Until constant mass, the bamboo wood being ultrasonically treated；
By gained be ultrasonically treated bamboo wood be put into the reaction chamber of cold plasma modified equipment, operating pressure be 40-50Pa,
Working gas is to carry out cold plasma modified processing 90-100s under Oxygen Condition, obtain the cold plasma modified processing bamboo of oxygen
Material；
(3) bamboo wood impregnation:
The bamboo wood of gained modification in (2) is placed in the glutaraldehyde that concentration is 10-20%, after impregnation 24-48h, is taken
Out, 6-7d is spontaneously dried in air, after placing into drying box gradient increased temperature solidification, is placed in air and is balanced 1-2d, obtain
The bamboo wood of impregnation；
(4) ion liquid modified bamboo wood:
Ionic liquid and polyethylene glycol are uniformly mixed so as to obtain the maceration extract that concentration is 30-40%, by the bamboo of gained impregnation in (3)
Material impregnates wherein, with plastic film sealing, pricks multiple pores, and dipping 15-20h is vacuumized in 80-85 DEG C of drying box, is taken out,
It is put into after carrying out hot-pressing processing 10-15min on 180-185 DEG C of hot press, impregnates 20-24h in deionized water, take out,
Second of hot-pressing processing 10-15min is carried out on 160-165 DEG C of hot press, is placed into 60-65 DEG C of air dry oven and is dried to perseverance
Weight.
Further, Pre-freezing rate is 1-2 DEG C/min in step (1), the condensation temperature of vacuum freeze is-
40 ~ -50 DEG C, final vacuum 10-20Pa, power 1000-1100W.
Further, ultrasonic power is 1200-1400W in step (2)；The input voltage of cold plasma processing is 110-
130V, heater current 180-230mA, output power 150-160W, vacuum degree 10-20Pa.
Further, gradient increased temperature refers to and is first warming up to 40-45 DEG C of solidification 5-6h, is warming up to 60-65 DEG C again in step (3)
Solidification 5-6h, it is warming up to 80-85 DEG C of solidification 5-6h again, is warming up to 120-125 DEG C of solidification 5-6h again.
Further, step (4) intermediate ion liquid is -3 methylimidazole villaumite of 1- butyl, first time, second of hot pressing pressure
Power is 10-20MPa.
The present invention has the advantage that compared with prior art
(1) vacuum freeze-drying does not have an impact bamboo wood configuration, and Main change concentrates on vascular bundle region, and catheter wall occurs
Crack occurs partial collapse on tube wall, and effectively pit increases on cell wall cell wall, aperture increases；It is handled through vacuum freeze drying
The specific surface area, median pore diameter and porosity of bamboo wood are obviously improved afterwards, and bamboo wood is handled through vacuum freeze drying, improves it
Permeability.
(2) bamboo material surface is ultrasonically treated, ultrasonic treatment can be improved the surface roughness of bamboo wood, be ultrasonically treated energy
Enough increase the surface free energy of bamboo wood, the surface wettability of bamboo wood improves after ultrasonic treatment；
Then it carries out surface to bamboo wood using oxygen cold plasma treating method again to be modified, the processing of oxygen cold plasma can etch bamboo
Material surface improves its specific surface area, hence it is evident that improves its surface wettability, the processing of oxygen cold plasma introduces big in bamboo material surface
Free radical is measured, the oxygen-containing polar functional groups such as O-H, C=O and C-O are generated, improves its surface wettability, the processing of oxygen cold plasma
The wetability of bamboo material surface can be effectively improved, provides effective modified method for post-productions such as bamboo wood covering with paint, impregnations.
(2) glutaraldehyde impregnation bamboo wood is used, the moisture pick-up properties decline of bamboo wood, dimensional stability obtain after glutaraldehyde processing
To improvement, glutaraldehyde processing can significantly improve the fungicidal properties of bamboo wood.
(4) ionic liquid and polyethylene glycol are mixed and maceration extract is made, dipping hot pressing modification, then benefit are carried out to bamboo wood
Bamboo wood is handled with the technique of hot pressing, immersion, hot pressing, while improving the physical and mechanical property of bamboo wood, reduces bamboo wood
Anisotropy.
Specific embodiment
Embodiment 1
A kind of method of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen, which is characterized in that including as follows
Step:
(1) bamboo wood vacuum freeze drying is handled:
5-6 setation bamboo is intercepted into thick bamboo tube, carries out cuing open piece, green de-etiolation processing growth bamboo cane is gone by force plane, by gained bamboo wood
It is placed in vacuum freeze drier, carries out prefreezing and vacuum freeze-drying processing, obtain the bamboo wood that moisture content is 85%；
(2) bamboo wood ultrasound-cold plasma modified processing of oxygen:
The bamboo wood of gained vacuum freeze drying processing in (1) is put into ultrasonic cell-break machine, is 65 DEG C of conditions in temperature
Under carry out ultrasonic treatment 60min after, it is quenched in the climatic chamber that relative humidity is 45%, temperature is 20 DEG C until quality is permanent
It is fixed, the bamboo wood being ultrasonically treated；
The bamboo wood that gained is ultrasonically treated is put into the reaction chamber of cold plasma modified equipment, is 40Pa, work in operating pressure
Making gas is to carry out cold plasma modified processing 90s under Oxygen Condition, obtain the cold plasma modified processing bamboo wood of oxygen；
(3) bamboo wood impregnation:
The bamboo wood of gained modification in (2) is placed in the glutaraldehyde that concentration is 10%, after impregnation for 24 hours, is taken out, in sky
6d is spontaneously dried in gas, after placing into drying box gradient increased temperature solidification, is placed in air and is balanced 1d, obtain the bamboo of impregnation
Material；
(4) ion liquid modified bamboo wood:
Ionic liquid and polyethylene glycol are uniformly mixed so as to obtain the maceration extract that concentration is 30%, the bamboo wood of gained impregnation in (3) is soaked
Stain wherein, with plastic film sealing, pricks multiple pores, and dipping 15h is vacuumized in 85 DEG C of drying boxes, takes out, is put into 185 DEG C of heat
After carrying out hot-pressing processing 10min on press, 20h is impregnated in deionized water, is taken out, and is carried out on 165 DEG C of hot presses second
Hot-pressing processing 10min is placed into 60 DEG C of air dry ovens and is dried to constant weight.
Further, Pre-freezing rate is 1 DEG C/min in step (1), and the condensation temperature of vacuum freeze is -40
DEG C, final vacuum 10Pa, power 1000W.
Further, ultrasonic power is 1200W in step (2)；The input voltage of cold plasma processing is 110V, filament
Electric current is 180mA, output power 150W, vacuum degree 10Pa.
Further, in step (3) gradient increased temperature refer to first be warming up to 45 DEG C of solidification 5h, be warming up to again 65 DEG C of solidification 5h,
It is warming up to 85 DEG C of solidification 5h again, is warming up to 125 DEG C of solidification 5h again.
Further, step (4) intermediate ion liquid is -3 methylimidazole villaumite of 1- butyl, first time, second of hot pressing pressure
Power is 10MPa.
Embodiment 2
A kind of method of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen, which is characterized in that including as follows
Step:
(1) bamboo wood vacuum freeze drying is handled:
5-6 setation bamboo is intercepted into thick bamboo tube, carries out cuing open piece, green de-etiolation processing growth bamboo cane is gone by force plane, by gained bamboo wood
It is placed in vacuum freeze drier, carries out prefreezing and vacuum freeze-drying processing, obtain the bamboo wood that moisture content is 115%；
(2) bamboo wood ultrasound-cold plasma modified processing of oxygen:
The bamboo wood of gained vacuum freeze drying processing in (1) is put into ultrasonic cell-break machine, is 55 DEG C of conditions in temperature
Under carry out ultrasonic treatment 90min after, it is quenched in the climatic chamber that relative humidity is 55%, temperature is 25 DEG C until quality is permanent
It is fixed, the bamboo wood being ultrasonically treated；
The bamboo wood that gained is ultrasonically treated is put into the reaction chamber of cold plasma modified equipment, is 50Pa, work in operating pressure
Making gas is to carry out cold plasma modified processing 100s under Oxygen Condition, obtain the cold plasma modified processing bamboo wood of oxygen；
(3) bamboo wood impregnation:
The bamboo wood of gained modification in (2) is placed in the glutaraldehyde that concentration is 20%, after impregnation 48h, is taken out, in sky
7d is spontaneously dried in gas, after placing into drying box gradient increased temperature solidification, is placed in air and is balanced 2d, obtain the bamboo of impregnation
Material；
(4) ion liquid modified bamboo wood:
Ionic liquid and polyethylene glycol are uniformly mixed so as to obtain the maceration extract that concentration is 40%, the bamboo wood of gained impregnation in (3) is soaked
Stain wherein, with plastic film sealing, pricks multiple pores, and dipping 15h is vacuumized in 80 DEG C of drying boxes, takes out, is put into 180 DEG C of heat
After carrying out hot-pressing processing 15min on press, impregnates for 24 hours, take out in deionized water, carried out on 160 DEG C of hot presses second
Hot-pressing processing 15min is placed into 65 DEG C of air dry ovens and is dried to constant weight.
Further, Pre-freezing rate is 2 DEG C/min in step (1), and the condensation temperature of vacuum freeze is -50
DEG C, final vacuum 20Pa, power 1100W.
Further, ultrasonic power is 1400W in step (2)；The input voltage of cold plasma processing is 130V, filament
Electric current is 230mA, output power 160W, vacuum degree 20Pa.
Further, in step (3) gradient increased temperature refer to first be warming up to 40 DEG C of solidification 6h, be warming up to again 60 DEG C of solidification 6h,
It is warming up to 80 DEG C of solidification 6h again, is warming up to 120 DEG C of solidification 6h again.
Further, step (4) intermediate ion liquid is -3 methylimidazole villaumite of 1- butyl, first time, second of hot pressing pressure
Power is 20MPa.
Comparative example 1
This comparative example 1 compared with Example 1, does not carry out vacuum freeze drying processing to bamboo wood in step (1), in addition to this
Method and step it is all the same.
Comparative example 2
This comparative example 2 compared with Example 2, does not use the cold plasma modified processing bamboo wood of oxygen in step (2), removes this
Outer method and step is all the same.
Blank bamboo wood of the control group without any modification
In order to compare the performance for the modification bamboo wood that the present invention is handled, to above-described embodiment 1, embodiment 2, comparative example 1, comparison
The corresponding modified bamboo wood obtained of 2 method of embodiment and the corresponding blank bamboo wood without any modification of control group, according to
Professional standard carries out performance detection, and specific correlation data is as shown in table 1 below:
Table 1
28%, mesopore pore size, which is improved, according to the modification bamboo wood hole gross area prepared by the method for the present invention increases 2.3 times, porosity
Increase, modified bamboo wood is 100% to the preventing efficiency of Penicillium citrinum and aspergillus niger, and modified bamboo wood has excellent surface wettability
Energy and fungicidal properties.
Vacuum freeze drying processing is not carried out to bamboo wood in comparative example 1, cause modified bamboo wood the hole gross area, in
Hole aperture, porosity reduce, but still are better than the performance of the blank bamboo wood without any modification, illustrate through vacuum refrigeration
The specific surface area, median pore diameter and porosity of bamboo wood are obviously improved after drying process, and bamboo wood is handled through vacuum freeze drying,
Improve its permeability；It does not use the cold plasma modified processing bamboo wood of oxygen in comparative example 2, leads to the flat of modified bamboo wood
The contact angle fall that weighs reduces, but still is better than the performance of the blank bamboo wood without any modification, illustrate oxygen it is cold it is equal from
Daughter handles the wetability that can significantly improve bamboo wood, provides effective modified method for post-productions such as bamboo wood covering with paint, impregnations.
Claims (5)
1. a kind of method of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen, which is characterized in that including such as
Lower step:
(1) bamboo wood vacuum freeze drying is handled:
5-6 setation bamboo is intercepted into thick bamboo tube, carries out cuing open piece, green de-etiolation processing growth bamboo cane is gone by force plane, by gained bamboo wood
It is placed in vacuum freeze drier, carries out prefreezing and vacuum freeze-drying processing, obtain the bamboo wood that moisture content is 85-115%；
(2) bamboo wood ultrasound-cold plasma modified processing of oxygen:
The bamboo wood of gained vacuum freeze drying processing in (1) is put into ultrasonic cell-break machine, is 55-65 DEG C of item in temperature
It is quenched in the climatic chamber that relative humidity is 45-55%, temperature is 20-25 DEG C after carrying out ultrasonic treatment 60-90min under part
Until constant mass, the bamboo wood being ultrasonically treated；
By gained be ultrasonically treated bamboo wood be put into the reaction chamber of cold plasma modified equipment, operating pressure be 40-50Pa,
Working gas is to carry out cold plasma modified processing 90-100s under Oxygen Condition, obtain the cold plasma modified processing bamboo of oxygen
Material；
(3) bamboo wood impregnation:
The bamboo wood of gained modification in (2) is placed in the glutaraldehyde that concentration is 10-20%, after impregnation 24-48h, is taken
Out, 6-7d is spontaneously dried in air, after placing into drying box gradient increased temperature solidification, is placed in air and is balanced 1-2d, obtain
The bamboo wood of impregnation；
(4) ion liquid modified bamboo wood:
Ionic liquid and polyethylene glycol are uniformly mixed so as to obtain the maceration extract that concentration is 30-40%, by the bamboo of gained impregnation in (3)
Material impregnates wherein, with plastic film sealing, pricks multiple pores, and dipping 15-20h is vacuumized in 80-85 DEG C of drying box, is taken out,
It is put into after carrying out hot-pressing processing 10-15min on 180-185 DEG C of hot press, impregnates 20-24h in deionized water, take out,
Second of hot-pressing processing 10-15min is carried out on 160-165 DEG C of hot press, is placed into 60-65 DEG C of air dry oven and is dried to perseverance
Weight.
2. a kind of side of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen according to claim 1
Method, which is characterized in that Pre-freezing rate is 1-2 DEG C/min in step (1), and the condensation temperature of vacuum freeze is -40
~ -50 DEG C, final vacuum 10-20Pa, power 1000-1100W.
3. a kind of side of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen according to claim 1
Method, which is characterized in that ultrasonic power is 1200-1400W in step (2)；The input voltage of cold plasma processing is 110-
130V, heater current 180-230mA, output power 150-160W, vacuum degree 10-20Pa.
4. a kind of side of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen according to claim 1
Method, which is characterized in that gradient increased temperature, which refers to, in step (3) is first warming up to 40-45 DEG C of solidification 5-6h, is warming up to 60-65 DEG C again admittedly
Change 5-6h, is warming up to 80-85 DEG C of solidification 5-6h again, is warming up to 120-125 DEG C of solidification 5-6h again.
5. a kind of side of the cold plasma modified processing bamboo wood of vacuum freeze drying-ultrasound-oxygen according to claim 1
Method, which is characterized in that step (4) intermediate ion liquid is -3 methylimidazole villaumite of 1- butyl, and first time, second of hot pressing pressure are equal
For 10-20MPa.
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Cited By (1)
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Application publication date: 20190524 |