CN110815465B - Treatment method for improving moisture resistance and use stability of fibraurea recisa pierre - Google Patents
Treatment method for improving moisture resistance and use stability of fibraurea recisa pierre Download PDFInfo
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- CN110815465B CN110815465B CN201911063880.6A CN201911063880A CN110815465B CN 110815465 B CN110815465 B CN 110815465B CN 201911063880 A CN201911063880 A CN 201911063880A CN 110815465 B CN110815465 B CN 110815465B
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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
- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
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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
- B27K1/00—Damping 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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/007—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process employing compositions comprising nanoparticles
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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
- B27K3/52—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
- B27K5/0015—Treating of wood not provided for in groups B27K1/00, B27K3/00 by electric means
- B27K5/002—Electric discharges, plasma
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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
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
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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
- B27K2240/20—Removing fungi, molds or insects
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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
- B27K2240/70—Hydrophobation treatment
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- Inorganic Chemistry (AREA)
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Abstract
The invention discloses a treatment method for improving moisture resistance and use stability of fibraurea recisa pierre, which comprises the following steps: the method comprises the following steps of (1) cleaning treatment, (2) primary drying treatment, (3) soaking treatment of a composite treatment liquid, (4) secondary drying treatment, (5) impregnating modification treatment of an impregnant, and (6) humidity-adjusting curing treatment. The treatment method has simple steps and reasonable process matching, is extremely suitable for treating the fibraurea recisa pierre, can obviously improve the moisture resistance, the mechanical strength and the use stability of the fibraurea recisa pierre, prolongs the service life of the fibraurea recisa pierre, and has extremely high market competitiveness.
Description
Technical Field
The invention belongs to the technical field of fibraurea recisa pierre processing, and particularly relates to a processing method for improving moisture resistance and use stability of fibraurea recisa pierre.
Background
Rattan is a tough and tough vine with extremely long body, and is commonly used for weaving wicker products due to the qualities of smooth hand feeling, smooth appearance and the like. However, the rattan is easy to crack and brittle fracture when being actually woven and used, the storage time is not long, the rattan is easy to mildew and moth-eaten, the use quality is reduced, the service life is prolonged, and the use performance is enhanced by processing and modifying the rattan for people.
At present, a plurality of methods for rattan modification treatment are available, one of which is to perform grease impregnation treatment on the rattan, that is, to perform pressure impregnation on the rattan by using resin components, so that the rattan contains a certain amount of resin components, thereby improving the mechanical and corrosion-resistant qualities of the rattan. If the application number is: 201710845490.9 discloses a processing method for improving the dimensional stability of palm rattan, wherein the palm rattan is subjected to impregnation treatment by using modified urea-formaldehyde resin, and the effect of improving the mechanical quality and other characteristics of the palm rattan is achieved. However, the method has the problems that the impregnation amount is usually large, on one hand, raw material resources are wasted, on the other hand, the method is not beneficial to environmental protection, and along with the continuous improvement of the product performance requirements of people, the treatment method needs to be continuously improved.
Disclosure of Invention
The invention aims to provide a treatment method for improving the moisture resistance and the use stability of fibraurea recisa pierre aiming at the existing problems.
The invention is realized by the following technical scheme:
a treatment method for improving moisture resistance and use stability of fibraurea recisa pierre comprises the following steps:
(1) Firstly, removing leaves and peels of fibraurea recisa pierre, then boiling the fibraurea recisa pierre in boiling water for 40 to 50min, then taking out the fibraurea recisa pierre, soaking in acid liquor for 10 to 15min, and finally taking out the fibraurea recisa pierre, and washing with clear water for one time for later use;
(2) Putting the fibraurea recisa pierre treated in the step (1) into a vacuum drying oven for drying treatment, and taking the fibraurea recisa pierre out for later use after 3 to 4 hours; the drying treatment is carried out, so that the fibraurea recisa pierre contains a small amount of water, the fibraurea recisa pierre can better absorb components in the composite treatment liquid in the next step, a humidity gradient is generated, and the processing treatment is convenient;
(3) Immersing the fibraurea recisa pierre treated in the step (2) into the composite treatment liquid, immediately introducing alternating current into the composite treatment liquid after 1 to 1.5min, stopping after 3 to 5min, taking out the fibraurea recisa pierre, and washing the fibraurea recisa pierre with clear water for later use; the composite treatment liquid comprises the following components in parts by weight: 20 to 25 parts of sodium chloride, 10 to 15 parts of dodecyl trimethyl ammonium bromide, 5~8 parts of nano silver powder, 8 to 14 parts of fatty alcohol polyoxyethylene ether and 500 to 600 parts of water; the sodium chloride added into the composite treatment liquid can play a role in improving the electric conduction capability of the solution, the nano silver powder can permeate into the surface layer of the fibraurea recisa pierre wood material and has good electric conductivity, the surface activity of the nano silver powder is improved during alternating current treatment, the cell wall gaps in the surface layer of the fibraurea recisa pierre wood are enlarged, the lignin is subjected to degradation and condensation reactions, the number of active groups is increased, the compatibility and the binding property with high polymer components are improved, the treated nano silver powder is uniformly dispersed in the tissue gaps of the surface layer of the fibraurea recisa pierre, anchor points are provided for the subsequent resin immersion, the binding strength is enhanced, and the treatment effect is improved;
(4) Putting the fibraurea recisa pierre processed in the step (3) into a constant temperature and humidity box, controlling the dry bulb temperature at 32-35 ℃ and the relative humidity at 70-75%, drying the fibraurea recisa pierre until the water content is 11-13%, and taking out for later use;
(5) Putting the fibraurea recisa pierre treated in the step (4) into a vacuum pressure impregnation tank filled with an impregnant, and impregnating the fibraurea recisa pierre for 2 to 2.5 hours, and taking the fibraurea recisa pierre out for later use;
(6) And (4) placing the fibraurea recisa pierre treated in the step (5) into a constant-temperature constant-humidity box for humidifying and curing, and taking out the fibraurea recisa pierre after 1-2h.
Further, the acid solution in the step (1) is a solution of 6~8% by weight.
Further, the temperature in the vacuum drying oven is controlled to be 70-75 ℃ during the drying treatment in the step (2).
Further, the magnitude of the current intensity is controlled to be 25 to 30mA/cm during the alternating current treatment in the step (3) 2 。
Further, the particle size of the nano silver powder in the step (3) is 10 to 30nm.
Further, the impregnant in the step (5) comprises the following components in parts by weight: 90 to 100 parts of urea resin and 5~8 parts of polyvinyl alcohol.
Further, the pressure in the vacuum pressure impregnation tank is kept at 2.5 to 3MPa during the impregnation treatment in the step (5).
Further, the temperature in the constant temperature and humidity box is kept at 110-115 ℃ and the relative humidity is kept at 65-70% during the humidity conditioning and curing treatment in the step (6).
The fibraurea recisa pierre as a wood material is easy to crack and break in the process of processing, weaving and using, and is easy to mildew, moth, age and the like in rainy days or wet places, and the service life is obviously shortened. The prior resin impregnation treatment method has large usage amount of resin, which is about 50% of the weight of the rattan material, and the performance of the treated material can not meet the requirements of people in the prior art. The method for treating the fibraurea recisa pierre is specially improved, particularly, the fibraurea recisa pierre is soaked by preparing the composite treatment liquid, so that the activity and the reaction capability of a fibraurea recisa pierre surface material can be improved, the bonding strength between the fibraurea recisa pierre surface material and a high polymer component is improved, the effect of impregnation treatment is enhanced, the use performance of the material is improved, the use amount of resin is reduced, the cost is saved, and the environment is protected.
Compared with the prior art, the invention has the following advantages:
the treatment method has simple steps and reasonable process matching, is extremely suitable for treating the fibraurea recisa pierre, can obviously improve the moisture resistance, the mechanical strength and the use stability of the fibraurea recisa pierre, prolongs the service life of the fibraurea recisa pierre, and has extremely high market competitiveness.
Detailed Description
Example 1
A treatment method for improving moisture resistance and use stability of fibraurea recisa pierre comprises the following steps:
(1) Firstly, removing leaves and peels of fibraurea recisa pierre, then boiling the fibraurea recisa pierre in boiling water for 40min, then taking the fibraurea recisa pierre out and immersing in acid liquor for soaking for 10min, and finally taking the fibraurea recisa pierre out and washing with clear water for one time for later use;
(2) Putting the fibraurea recisa pierre treated in the step (1) into a vacuum drying oven for drying treatment, and taking the fibraurea recisa pierre out for later use after 3 hours;
(3) Immersing the fibraurea recisa pierre treated in the step (2) into the composite treatment liquid, immediately introducing alternating current into the composite treatment liquid after 1min, stopping after 3min, taking out the fibraurea recisa pierre, and washing the fibraurea recisa pierre with clear water for later use; the composite treatment liquid comprises the following components in parts by weight: 20 parts of sodium chloride, 10 parts of dodecyl trimethyl ammonium bromide, 5 parts of nano silver powder, 8 parts of fatty alcohol-polyoxyethylene ether and 500 parts of water;
(4) Placing the fibraurea recisa pierre treated in the step (3) into a constant temperature and humidity box, controlling the temperature of a dry bulb at 32 ℃ and the relative humidity at 70%, drying the fibraurea recisa pierre until the water content is 11%, and taking out the fibraurea recisa pierre for later use;
(5) Putting the fibraurea recisa pierre treated in the step (4) into a vacuum pressure impregnation tank containing an impregnant, impregnating the fibraurea recisa pierre, and taking the fibraurea recisa pierre out for later use after 2 hours;
(6) And (4) placing the fibraurea recisa pierre treated in the step (5) into a constant temperature and humidity box for humidifying and curing, and taking out the fibraurea recisa pierre after 1 h.
Further, the acid solution in the step (1) is a hydrochloric acid solution with a mass fraction of 6%.
Further, the temperature in the vacuum drying oven was controlled to 70 ℃ during the drying treatment in the step (2).
Further, the current intensity is controlled to be 25mA/cm during the alternating current treatment in the step (3) 2 。
Further, the particle size of the nano silver powder in the step (3) is 10 to 30nm.
Further, the impregnant in the step (5) comprises the following components in parts by weight: 90 parts of urea-formaldehyde resin and 5 parts of polyvinyl alcohol.
Further, the pressure in the vacuum pressure impregnation tank was maintained at 2.5MPa during the impregnation treatment in the step (5).
Further, the temperature in the constant temperature and humidity chamber is maintained at 110 ℃ and the relative humidity is maintained at 65% during the humidity conditioning and curing treatment in step (6).
Example 2
A treatment method for improving moisture resistance and use stability of fibraurea recisa pierre comprises the following steps:
(1) Firstly, removing leaves and peels of fibraurea recisa pierre, then boiling the fibraurea recisa pierre in boiling water for 45min, taking the fibraurea recisa pierre out, soaking in acid liquor for 13min, and finally taking the fibraurea recisa pierre out and washing with clear water for one time for later use;
(2) Putting the fibraurea recisa pierre treated in the step (1) into a vacuum drying oven for drying treatment, and taking the fibraurea recisa pierre out for later use after 3.5 hours;
(3) Immersing the fibraurea recisa pierre treated in the step (2) into the composite treatment liquid, immediately introducing alternating current into the composite treatment liquid after 1.3min, stopping after 4min, taking out the fibraurea recisa pierre, and washing with clear water for later use; the composite treatment liquid comprises the following components in parts by weight: 22 parts of sodium chloride, 13 parts of dodecyl trimethyl ammonium bromide, 7 parts of nano silver powder, 12 parts of fatty alcohol-polyoxyethylene ether and 550 parts of water;
(4) Placing the fibraurea recisa pierre treated in the step (3) into a constant temperature and humidity box, controlling the temperature of a dry bulb at 34 ℃ and the relative humidity at 72%, drying the fibraurea recisa pierre until the water content is 12%, and taking out the fibraurea recisa pierre for later use;
(5) Putting the fibraurea recisa pierre treated in the step (4) into a vacuum pressure impregnation tank containing an impregnant, impregnating the fibraurea recisa pierre, and taking the fibraurea recisa pierre out for later use after 2.3 h;
(6) And (4) placing the fibraurea recisa pierre treated in the step (5) into a constant temperature and humidity box for humidifying and curing, and taking out the fibraurea recisa pierre after 1.5 h.
Further, the acid solution in the step (1) is a hydrochloric acid solution with a mass fraction of 7%.
Further, the temperature in the vacuum drying oven was controlled to 73 ℃ during the drying treatment in step (2).
Further, the current intensity is controlled to be 28mA/cm during the alternating current treatment in the step (3) 2 。
Further, the particle size of the nano silver powder in the step (3) is 10 to 30nm.
Further, the impregnant in the step (5) comprises the following components in parts by weight: 95 parts of urea-formaldehyde resin and 7 parts of polyvinyl alcohol.
Further, the pressure in the vacuum pressure impregnation tank was maintained at 2.8MPa during the impregnation treatment in the step (5).
Further, the temperature in the constant temperature and humidity chamber during the humidity conditioning and curing treatment in step (6) was maintained at 113 ℃ and the relative humidity was 6%.
Example 3
A treatment method for improving moisture resistance and use stability of fibraurea recisa pierre comprises the following steps:
(1) Firstly, removing leaves and peels of fibraurea recisa pierre, then boiling the fibraurea recisa pierre in boiling water for 50min, then taking the fibraurea recisa pierre out and immersing in acid liquor for soaking for 15min, and finally taking the fibraurea recisa pierre out and washing with clear water for one time for later use;
(2) Putting the fibraurea recisa pierre treated in the step (1) into a vacuum drying oven for drying treatment, and taking the fibraurea recisa pierre out for later use after 4 hours;
(3) Immersing the fibraurea recisa pierre treated in the step (2) into the composite treatment liquid, immediately introducing alternating current into the composite treatment liquid after 1.5min, stopping after 5min, taking out the fibraurea recisa pierre, and washing the fibraurea recisa pierre with clear water for later use; the composite treatment liquid comprises the following components in parts by weight: 25 parts of sodium chloride, 15 parts of dodecyl trimethyl ammonium bromide, 8 parts of nano silver powder, 14 parts of fatty alcohol-polyoxyethylene ether and 600 parts of water;
(4) Placing the fibraurea recisa pierre treated in the step (3) into a constant temperature and humidity box, controlling the temperature of a dry bulb to be 35 ℃ and the relative humidity to be 75%, drying the fibraurea recisa pierre until the water content is 13%, and taking out the fibraurea recisa pierre for later use;
(5) Putting the fibraurea recisa pierre treated in the step (4) into a vacuum pressure impregnation tank containing an impregnant, impregnating the fibraurea recisa pierre, and taking the fibraurea recisa pierre out for later use after 2.5 hours;
(6) And (4) placing the fibraurea recisa pierre treated in the step (5) into a constant-temperature constant-humidity box for humidifying and curing, and taking out the fibraurea recisa pierre after 2 hours.
Further, the acid solution in the step (1) is a hydrochloric acid solution with a mass fraction of 8%.
Further, the temperature in the vacuum drying oven was controlled to 75 ℃ during the drying treatment in the step (2).
Further, the current intensity is controlled to be 30mA/cm during the alternating current treatment in the step (3) 2 。
Further, the particle size of the nano silver powder in the step (3) is 10 to 30nm.
Further, the impregnant in the step (5) comprises the following components in parts by weight: 100 parts of urea-formaldehyde resin and 8 parts of polyvinyl alcohol.
Further, the pressure in the vacuum pressure impregnation tank was maintained at 3MPa during the impregnation treatment in the step (5).
Further, the temperature in the constant temperature and humidity chamber during the humidity conditioning and curing treatment in step (6) was maintained at 115 ℃ and the relative humidity was 70%.
In order to compare the effects of the invention, the same batch of 12-year-old fibraurea stems harvested from a certain forest farm of Fuyang of Anhui province are selected as experimental objects, the average diameter of the experimental objects is 14mm, the length of the experimental objects is 10-11m, and the internode length of the experimental objects is about 20cm, then the experimental objects are processed by the method of the embodiment 2, and then the performance test is carried out on the treated fibraurea stems of each group, wherein the specific comparative data are shown in the following table 1:
TABLE 1
| Modulus of elasticity against compression (MPa) | Bending Strength (MPa) | Water swelling Rate (%) | Amount of impregnation (%) | |
| Example 2 | 1693.4 | 88.9 | 4.0 | 22.5 |
| Blank control group | 1213.6 | 55.7 | 12.4 | / |
Note: the experimental data described in table 1 above are the average of the experimental results for each group; the longitudinal compression elastic modulus is determined by referring to GB/T3356-2009, and the length of a test piece is controlled to be 4cm; the flexural strength is determined with reference to GB/T15780-1995, wherein the length of the test piece is controlled to be 160mm; the water swelling rate is determined by reference to GB/T1933-2009 and GB/T15780-1995; the impregnation amount is the percentage of the impregnated components such as resin and the like to the weight of the fibraurea recisa pierre, and specifically is (the weight of the treated fibraurea recisa pierre-the weight of the untreated fibraurea recisa pierre) ÷ the weight of the untreated fibraurea recisa pierre multiplied by 100%, so as to represent the impregnation amount; the blank control group was obtained without any treatment of fibraurea recisa.
As can be seen from the above table 1, the fibraurea recisa pierre treated by the method of the invention has obvious enhancement in waterproof, moistureproof and mechanical quality, and is still improved obviously compared with a control group method, and the method uses less dipping raw materials, reduces the use cost of the raw materials, protects the environment and has great market competitiveness.
Claims (6)
1. A treatment method for improving the moisture resistance and the use stability of fibraurea recisa pierre is characterized by comprising the following steps:
(1) Firstly, removing leaves and peels of fibraurea recisa pierre, then boiling the fibraurea recisa pierre in boiling water for 40 to 50min, then taking out the fibraurea recisa pierre, soaking in acid liquor for 10 to 15min, and finally taking out the fibraurea recisa pierre, and washing with clear water for one time for later use;
(2) Putting the fibraurea recisa pierre treated in the step (1) into a vacuum drying oven for drying treatment, and taking the fibraurea recisa pierre out for later use after 3 to 4 hours;
(3) Soaking the fibraurea recisa pierre treated in the step (2) into the composite treatment liquid, immediately introducing alternating current into the composite treatment liquid for treatment after 1 to 1.5min, stopping after 3 to 5min, taking out the fibraurea recisa pierre, and washing the fibraurea recisa pierre with clear water for later use; the composite treatment liquid comprises the following components in parts by weight: 20 to 25 parts of sodium chloride, 10 to 15 parts of dodecyl trimethyl ammonium bromide, 5~8 parts of nano silver powder, 8 to 14 parts of fatty alcohol-polyoxyethylene ether and 500 to 600 parts of water,
the current intensity is controlled to be 25 to 30mA/cm during the alternating current treatment 2 ；
(4) Putting the fibraurea recisa pierre processed in the step (3) into a constant temperature and humidity box, controlling the dry bulb temperature at 32-35 ℃ and the relative humidity at 70-75%, drying the fibraurea recisa pierre until the water content is 11-13%, and taking out for later use;
(5) Putting the fibraurea recisa pierre treated in the step (4) into a vacuum pressure impregnation tank filled with an impregnant, and impregnating the fibraurea recisa pierre for 2 to 2.5 hours, and taking the fibraurea recisa pierre out for later use;
(6) Placing the fibraurea recisa pierre treated in the step (5) into a constant temperature and humidity box for humidifying and curing, and taking out the fibraurea recisa pierre after 1-2h;
the impregnant in the step (5) comprises the following components in parts by weight: 90 to 100 parts of urea resin and 5~8 parts of polyvinyl alcohol.
2. The treatment method for improving moisture resistance and use stability of fibraurea recisa pierre as claimed in claim 1, wherein the acid solution in step (1) is a solution of 6~8% by weight.
3. The processing method for improving the moisture resistance and the use stability of the fibraurea recisa pierre as claimed in claim 1, wherein the temperature in the vacuum drying oven is controlled to be 70-75 ℃ during the drying process in the step (2).
4. The processing method for improving the moisture resistance and the use stability of the fibraurea recisa pierre as claimed in claim 1, wherein the particle size of the nano silver powder in step (3) is 10 to 30nm.
5. The method as claimed in claim 1, wherein the pressure in the vacuum impregnation tank is maintained at 2.5 to 3MPa during the impregnation treatment in step (5).
6. The processing method for improving the moisture resistance and the use stability of the fibraurea recisa pierre as claimed in claim 1, wherein the temperature in the constant temperature and humidity chamber is kept at 110 to 115 ℃ and the relative humidity is kept at 65 to 70% during the moisture-adjusting curing process in step (6).
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