CN109233253A - A kind of preparation method of waterproof ventilation polyurethane film - Google Patents
A kind of preparation method of waterproof ventilation polyurethane film Download PDFInfo
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- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
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- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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Abstract
The invention discloses a kind of preparation methods of waterproof ventilation polyurethane film, belong to technical field of polymer materials.According to parts by weight, it successively weighs: 60~70 parts of polyurethane, 10~15 parts of polyethylene glycol, 12~18 parts of improved silicas, 18~20 parts of modified graphene mixtures, 3~5 parts of diethyl phthalates, 5~8 parts of epoxidized soybean oils, 3~8 parts of silane coupling agents, 10~15 parts of acetone and 15~18 parts of N, dinethylformamide, by polyurethane and N, dinethylformamide mixing, and acetone is added, after being stirred, obtain blank liquid, blank liquid is mixed with improved silica, and modified graphene mixture is added, diethyl phthalate, epoxidized soybean oil and silane coupling agent, after being stirred, it obtains into film liquid, it will be applied in Teflon mould at film liquid, and the molding that is heating and curing, take off film, obtain waterproof ventilation polyurethane film.Gained waterproof ventilation polyurethane film of the invention has excellent permeability and hydrophobic performance.
Description
Technical field
The invention discloses a kind of preparation methods of waterproof ventilation polyurethane film, belong to technical field of polymer materials.
Background technique
Polyurethane is a kind of important high molecular material, and chemical synthesis is mainly to pass through diisocyanate and dihydric alcohol
Sudden reaction carries out.The structure design of polymer is not only the basis of polymer chemistry, also to gradually extend to material with synthesis
Expect the fields such as, Journal of Molecular Catalysis, biological medicine.Therefore, polyurethane synthetic method, exploitation new polyurethane material are explored, is had
Important theory significance and potential application value.
With the pay attention to day by day of coating safety and environmental protection index, aqueous polyurethane because the characteristics such as its less harmful, low pollution by
Gradually received by market.The decentralized medium of aqueous polyurethane has less toxic, pollution-free, odorlessness, VOC content low based on water
The advantages that, it is much smaller to the damage ratio solvent borne polyurethane of environment.But it is limited by synthesis technology, point of aqueous polyurethane
There are the hydrophilic radicals such as carboxyl in the lower, film of son amount.Therefore, water resistance is bad after aqueous polyurethane film forming, physics, chemically
It can be not so good as solvent borne polyurethane.
Surface hydrophobicity modification is the important channel for improving polymer thin film properties, and the hydrophobic membrane of modified formation can be mentioned substantially
The water resistance of high water paint, therefore obtained research extensively and profoundly.Currently, the research that the surface hydrophobicity of polymer is modified
Special chemical reaction is depended on, i.e., obtains the polyurethane with specific function group first, is then implemented on its surface
Incident click reaction, introduces hydrophobic performance group and is modified.Fournier et al. has purchased surface-functionalized first
Polyurethane sponge (surface group is alkynyl), then carry out 1,3- dipole with it with the azido compound with hydrophobic alkyl chain
Cycloaddition reaction, to obtain the polyurethane sponge material that surface has hydrophobic performance.Nystrom et al., Xu et al. also distinguish
Hydrophobic alkyl chain is introduced on functional fiber element, functional poly butadiene surface, reaches and improves hydrophobic purpose.However,
This hydrophobically modified mode is required to polymer surfaces with special functional group, moreover, in order to ensure successive modified reaction
Smooth implementation, the chemical property of these functional groups is often more active, is prone to side reaction and goes bad, this is caused to birds of the same feather flock together
The synthesis difficulty for closing object is big, and the surface for being not particularly suited for the polyurethane material being commonly used is modified.For traditional at present
The bad problem of permeability and hydrophobic performance existing for polyurethane film, also needs to study it.
Summary of the invention
The present invention solves the technical problem of: it is bad for conventional urethane film breathable performance and hydrophobic performance
Problem provides a kind of preparation method of waterproof ventilation polyurethane film.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
(1) by ethyl alcohol, 1.6:1.0~2.0:1.0 is mixed by volume with water, and is added the 12 of 0.2~0.3 times of ethyl alcohol volume
Amine after being stirred, obtains alcohol mixeding liquid, and ethyl orthosilicate is mixed with alcohol mixeding liquid 1:4~1:8 in mass ratio, stirring
It after hydrolysis, filters, dry, calcining obtains pretreated silicon dioxide, by pretreated silicon dioxide and paraffin 1:3~1:5 in mass ratio
Mixing and ball milling obtains improved silica；
(2) graphene oxide dispersion is mixed with graphene microchip 100:5~100:8 in mass ratio, after ultrasonic disperse, hydro-thermal
Processing, obtains pretreating graphite alkene mixture, pretreating graphite alkene mixture dry, pulverize sieving, obtain graphene mixture；
(3) graphene mixture is mixed with alcoholic solvent 1:30~1:40 in mass ratio, after vacuum pressure maintaining processing, is down to room temperature,
Obtain modified graphene mixture；
(4) according to parts by weight, it successively weighs: 60~70 parts of polyurethane, 10~15 parts of polyethylene glycol, 12~18 parts of modified dioxies
SiClx, 18~20 parts of modified graphene mixtures, 3~5 parts of diethyl phthalates, 5~8 parts of epoxidized soybean oils, 3~8 parts
Silane coupling agent, 10~15 parts of acetone and 15~18 parts of n,N-Dimethylformamide, by polyurethane and n,N-Dimethylformamide
Mixing, and acetone is added, after being stirred, blank liquid is obtained, blank liquid is mixed with improved silica, and modified graphite is added
Alkene mixture, diethyl phthalate, epoxidized soybean oil and silane coupling agent after being stirred, obtain into film liquid, will be at film liquid
It is applied in Teflon mould, and the molding that is heating and curing, takes off film, obtain waterproof ventilation polyurethane film.
Step (1) calcination temperature is 500~650 DEG C.
Step (1) the paraffin carbon atom number is 24~32.
Step (2) graphene oxide dispersion is to mix graphene oxide and water 1:100~1:120 in mass ratio
It closes, ultrasonic disperse obtains graphene oxide dispersion.
Step (3) alcoholic solvent is to mix ethyl alcohol with octadecyl alcolol 1:2~1:3 in mass ratio, obtains alcoholic solvent.
Step (4) molecular weight polyethylene glycol is 1000~1600.
Step (4) silane coupling agent is silane resin acceptor kh-550, silane coupling agent KH-560 or silane coupling agent
Any one in KH-570.
The beneficial effects of the present invention are:
(1) improved silica is added when preparing waterproof ventilation polyurethane film by the present invention, and improved silica first is adding
It can be distributed in product surface in product preparation process under the action of paraffin after entering in product, to be formed in product surface
Nanoscale mastoid process structure, and then the hydrophobicity of product surface is improved, secondly, abundant containing specific surface area in improved silica
And the lesser silica in aperture, and since silica interior hole is through-hole structure, add in improved silica
After entering in product, the hydrophobicity of product surface can be made to further increase, the gas permeability of product improves；
(2) modified graphene mixture is added when preparing waterproof ventilation polyurethane film by the present invention, on the one hand, graphene mixing
In object, graphene and graphene microchip form three-dimensional net structure, can be formed in interiors of products after being added in product abundant
Hole, so that the gas permeability of product is improved, on the other hand, after modification, graphene and stone in modified graphene mixture
The three-dimensional net structure that black alkene microplate is formed can be filled by alcoholic solvent, to reduce the three-dimensional of graphene and graphene microchip formation
The size in network structure aperture, and then further increase the hydrophobicity of product, also, in product preparation process, part stone
The three-dimensional net structure surface that wax can be formed graphene with graphene microchip is further filled, thus make the hydrophobicity of product into
One step improves.
Specific embodiment
Graphene oxide is mixed with water 1:100~1:120 in mass ratio, is surpassed under conditions of frequency is 45~55kHz
After sound disperses 30~60min, graphene oxide dispersion is obtained；By ethyl alcohol, 1.6:1.0~2.0:1.0 is mixed in by volume with water
In beaker, and 0.2~0.3 times of ethyl alcohol volume of lauryl amine being added into beaker, is 45~65 DEG C in temperature, revolving speed is 300~
After being stirred 45~60min under conditions of 450r/min, alcohol mixeding liquid is obtained, ethyl orthosilicate and alcohol mixeding liquid are pressed into matter
Amount than 1:4~1:8 mix, control ethyl orthosilicate be added rate be 5~10mL/min, and in temperature be 30~45 DEG C, revolving speed
After 4~5h of stirring hydrolysis under conditions of 300~350r/min, filtering obtains filter cake, the item for being 80~85 DEG C in temperature by filter cake
Under part after dry 4~5h, calcining obtains pretreated silicon dioxide, by pretreated silicon dioxide and paraffin 1:3~1:5 in mass ratio
It is mixed in ball mill, after 30~60min of mixing and ball milling, obtains improved silica；By graphene oxide dispersion and graphene
Microplate 100:5~100:8 in mass ratio mixing obtains under conditions of frequency is 50~60kHz after 20~50min of ultrasonic disperse
Pretreating graphite alkene mixture blank, hydro-thermal under conditions of being 160~180 DEG C in temperature by pretreating graphite alkene mixture blank
After handling 2~4h, pretreating graphite alkene mixture is obtained, by pretreating graphite alkene mixture under conditions of temperature is 55~75 DEG C
After dry 1~3h, crushing is sieved with 100 mesh sieve, and obtains graphene mixture；By graphene mixture and alcoholic solvent 1:30 in mass ratio~
1:40 mixing obtains modified graphene mixture blank after vacuum pressure maintaining handles 6~7h under conditions of 70~75 DEG C of temperature, will
Modified graphene mixture blank is down to room temperature, obtains modified graphene mixture；According to parts by weight, it successively weighs: 60~70
Part polyurethane, 10~15 parts of polyethylene glycol, 12~18 parts of improved silicas, 18~20 parts of modified graphene mixtures, 3~5
Part diethyl phthalate, 5~8 parts of epoxidized soybean oils, 3~8 parts of silane coupling agents, 10~15 parts of acetone and 15~18 parts of N,
Polyurethane and n,N-Dimethylformamide are mixed in blender, and acetone are added into blender by dinethylformamide,
It is 50~70 DEG C in temperature, under conditions of revolving speed is 200~350r/min, is stirred to polyurethane dissolution, obtains blank liquid,
Blank liquid and improved silica are mixed in batch mixer, and sequentially add modified graphene mixture into batch mixer, it is adjacent
Diethyl phthalate, epoxidized soybean oil and silane coupling agent are 60~80 DEG C in temperature, and revolving speed is 300~350r/min's
Under the conditions of, after being stirred 30~60min, film liquid is obtained into, will be applied in Teflon mould at film liquid, and be in temperature
Curing molding under conditions of 80~90 DEG C, takes off film, obtains waterproof ventilation polyurethane film.The calcination temperature is 500~650 DEG C.
The paraffin carbon atom number is 24~32.The alcoholic solvent is to mix ethyl alcohol with octadecyl alcolol 1:2~1:3 in mass ratio, obtains alcohol
Solvent.The molecular weight polyethylene glycol is 1000~1600.The silane coupling agent is silane resin acceptor kh-550, silane coupled
Any one in agent KH-560 or Silane coupling reagent KH-570.
Example 1
Graphene oxide is mixed with water 1:120 in mass ratio, under conditions of frequency is 55kHz after ultrasonic disperse 60min, is obtained
Graphene oxide dispersion；By ethyl alcohol, 2.0:1.0 is mixed in beaker by volume with water, and ethyl alcohol volume is added into beaker
0.3 times of lauryl amine is 65 DEG C in temperature, after revolving speed is stirred 60min under conditions of being 450r/min, obtains ethyl alcohol mixing
Liquid mixes ethyl orthosilicate with alcohol mixeding liquid 1:8 in mass ratio, and it is 10mL/min that rate, which is added, in control ethyl orthosilicate,
And in temperature be 45 DEG C, revolving speed be 350r/min under conditions of stirring hydrolysis 5h after, filtering, obtain filter cake, be in temperature by filter cake
Under conditions of 85 DEG C after dry 5h, calcining obtains pretreated silicon dioxide, by pretreated silicon dioxide and paraffin 1:5 in mass ratio
It is mixed in ball mill, after mixing and ball milling 60min, obtains improved silica；By graphene oxide dispersion and graphene microchip
The mixing of 100:8 in mass ratio obtains pretreating graphite alkene mixture base under conditions of frequency is 60kHz after ultrasonic disperse 50min
It is mixed to obtain pretreating graphite alkene under conditions of being 180 DEG C in temperature by pretreating graphite alkene mixture blank after hydro-thermal process 4h for material
Object is closed, under conditions of being 75 DEG C in temperature by pretreating graphite alkene mixture after dry 3h, crushing is sieved with 100 mesh sieve, and obtains graphene
Mixture；Graphene mixture is mixed with alcoholic solvent 1:40 in mass ratio, vacuum pressure maintaining is handled under conditions of 75 DEG C of temperature
After 7h, modified graphene mixture blank is obtained, modified graphene mixture blank is down to room temperature, obtains modified graphene mixing
Object；According to parts by weight, it successively weighs: 70 parts of polyurethane, 15 parts of polyethylene glycol, 18 parts of improved silicas, 20 parts of modified stones
Black alkene mixture, 5 parts of diethyl phthalates, 8 parts of epoxidized soybean oils, 8 parts of silane coupling agents, 15 parts of acetone and 18 parts of N, N-
Polyurethane and n,N-Dimethylformamide are mixed in blender, and acetone are added into blender by dimethylformamide, in
Temperature be 70 DEG C, revolving speed be 350r/min under conditions of, be stirred to polyurethane dissolution after, obtain blank liquid, by blank liquid with
Improved silica is mixed in batch mixer, and modified graphene mixture is sequentially added into batch mixer, phthalic acid two
Ethyl ester, epoxidized soybean oil and silane coupling agent are 80 DEG C in temperature, under conditions of revolving speed is 350r/min, are stirred 60min
Afterwards, film liquid is obtained into, will be applied in Teflon mould, and the curing molding under the conditions of at a temperature of 90 °C, and take off at film liquid
Film obtains waterproof ventilation polyurethane film.The calcination temperature is 650 DEG C.The paraffin carbon atom number is 32.The alcoholic solvent is
Ethyl alcohol is mixed with octadecyl alcolol 1:3 in mass ratio, obtains alcoholic solvent.The molecular weight polyethylene glycol is 1600.It is described silane coupled
Agent is silane resin acceptor kh-550.
Example 2
Graphene oxide is mixed with water 1:120 in mass ratio, under conditions of frequency is 55kHz after ultrasonic disperse 60min, is obtained
Graphene oxide dispersion；Graphene oxide dispersion is mixed with graphene microchip 100:8 in mass ratio, is in frequency
Under conditions of 60kHz after ultrasonic disperse 50min, pretreating graphite alkene mixture blank is obtained, by pretreating graphite alkene mixture base
Expect be 180 DEG C in temperature under conditions of after hydro-thermal process 4h, pretreating graphite alkene mixture is obtained, by pretreating graphite alkene mixture
Under conditions of being 75 DEG C in temperature after dry 3h, crushing is sieved with 100 mesh sieve, and obtains graphene mixture；By graphene mixture and alcohol
Solvent 1:40 in mass ratio mixing obtains modified graphene mixture base under conditions of 75 DEG C of temperature after vacuum pressure maintaining processing 7h
Material, is down to room temperature for modified graphene mixture blank, obtains modified graphene mixture；According to parts by weight, it successively weighs: 70
Part polyurethane, 15 parts of polyethylene glycol, 18 parts of silica, 20 parts of modified graphene mixtures, 5 parts of diethyl phthalates, 8
Part epoxidized soybean oil, 8 parts of silane coupling agents, 15 parts of acetone and 18 parts of n,N-Dimethylformamide, by polyurethane and N, N- diformazan
Base formamide is mixed in blender, and acetone is added into blender, is 70 DEG C in temperature, revolving speed is the condition of 350r/min
Under, it is stirred to polyurethane dissolution, obtains blank liquid, blank liquid and silica are mixed in batch mixer, and to mixing
Modified graphene mixture, diethyl phthalate, epoxidized soybean oil and silane coupling agent are sequentially added in machine, are in temperature
80 DEG C, under conditions of revolving speed is 350r/min, after being stirred 60min, film liquid is obtained into, polytetrafluoroethylene (PTFE) will be applied at film liquid
In mold, and the curing molding under the conditions of at a temperature of 90 °C, film is taken off, waterproof ventilation polyurethane film is obtained.The calcination temperature
It is 650 DEG C.The paraffin carbon atom number is 32.The alcoholic solvent is to mix ethyl alcohol with octadecyl alcolol 1:3 in mass ratio, and it is molten to obtain alcohol
Agent.The molecular weight polyethylene glycol is 1600.The silane coupling agent is silane resin acceptor kh-550.
Example 3
Graphene oxide is mixed with water 1:120 in mass ratio, under conditions of frequency is 55kHz after ultrasonic disperse 60min, is obtained
Graphene oxide dispersion；By ethyl alcohol, 2.0:1.0 is mixed in beaker by volume with water, and ethyl alcohol volume is added into beaker
0.3 times of lauryl amine is 65 DEG C in temperature, after revolving speed is stirred 60min under conditions of being 450r/min, obtains ethyl alcohol mixing
Liquid mixes ethyl orthosilicate with alcohol mixeding liquid 1:8 in mass ratio, and it is 10mL/min that rate, which is added, in control ethyl orthosilicate,
And in temperature be 45 DEG C, revolving speed be 350r/min under conditions of stirring hydrolysis 5h after, filtering, obtain filter cake, be in temperature by filter cake
Under conditions of 85 DEG C after dry 5h, calcining obtains improved silica；Graphene oxide dispersion and graphene microchip are pressed into quality
It is mixed than 100:8, under conditions of frequency is 60kHz after ultrasonic disperse 50min, obtains pretreating graphite alkene mixture blank, it will
Under conditions of pretreating graphite alkene mixture blank is 180 DEG C in temperature after hydro-thermal process 4h, pretreating graphite alkene mixture is obtained,
Under conditions of being 75 DEG C in temperature by pretreating graphite alkene mixture after dry 3h, crushing is sieved with 100 mesh sieve, and obtains graphene mixing
Object；Graphene mixture is mixed with alcoholic solvent 1:40 in mass ratio, under conditions of 75 DEG C of temperature after vacuum pressure maintaining processing 7h,
Modified graphene mixture blank is obtained, modified graphene mixture blank is down to room temperature, obtains modified graphene mixture；By weight
Number meter is measured, is successively weighed: 70 parts of polyurethane, 15 parts of polyethylene glycol, 18 parts of improved silicas, 20 parts of modified graphene mixing
Object, 5 parts of diethyl phthalates, 8 parts of epoxidized soybean oils, 8 parts of silane coupling agents, 15 parts of acetone and 18 parts of N, N- dimethyl methyl
Polyurethane and n,N-Dimethylformamide are mixed in blender, and acetone are added into blender by amide, in temperature be 70
DEG C, it under conditions of revolving speed is 350r/min, is stirred to polyurethane dissolution, obtains blank liquid, by blank liquid and modified dioxy
SiClx is mixed in batch mixer, and modified graphene mixture, diethyl phthalate, epoxy are sequentially added into batch mixer
Soybean oil and silane coupling agent are 80 DEG C in temperature, under conditions of revolving speed is 350r/min, after being stirred 60min, must form a film
Liquid will be applied in Teflon mould at film liquid, and the curing molding under the conditions of at a temperature of 90 °C, be taken off film, be obtained waterproof
Ventilation polyurethane film.The calcination temperature is 650 DEG C.The paraffin carbon atom number is 32.The alcoholic solvent be by ethyl alcohol with
Octadecyl alcolol 1:3 in mass ratio mixing, obtains alcoholic solvent.The molecular weight polyethylene glycol is 1600.The silane coupling agent is silane
Coupling agent KH-550.
Example 4
Graphene oxide is mixed with water 1:120 in mass ratio, under conditions of frequency is 55kHz after ultrasonic disperse 60min, is obtained
Graphene oxide dispersion；By ethyl alcohol, 2.0:1.0 is mixed in beaker by volume with water, and ethyl alcohol volume is added into beaker
0.3 times of lauryl amine is 65 DEG C in temperature, after revolving speed is stirred 60min under conditions of being 450r/min, obtains ethyl alcohol mixing
Liquid mixes ethyl orthosilicate with alcohol mixeding liquid 1:8 in mass ratio, and it is 10mL/min that rate, which is added, in control ethyl orthosilicate,
And in temperature be 45 DEG C, revolving speed be 350r/min under conditions of stirring hydrolysis 5h after, filtering, obtain filter cake, be in temperature by filter cake
Under conditions of 85 DEG C after dry 5h, calcining obtains pretreated silicon dioxide, by pretreated silicon dioxide and paraffin 1:5 in mass ratio
It is mixed in ball mill, after mixing and ball milling 60min, obtains improved silica；By graphene oxide dispersion and graphene microchip
The mixing of 100:8 in mass ratio obtains pretreating graphite alkene mixture base under conditions of frequency is 60kHz after ultrasonic disperse 50min
It is mixed to obtain pretreating graphite alkene under conditions of being 180 DEG C in temperature by pretreating graphite alkene mixture blank after hydro-thermal process 4h for material
Object is closed, under conditions of being 75 DEG C in temperature by pretreating graphite alkene mixture after dry 3h, crushing is sieved with 100 mesh sieve, and obtains graphene
Mixture；According to parts by weight, it successively weighs: 70 parts of polyurethane, 15 parts of polyethylene glycol, 18 parts of improved silicas, 20 parts of stones
Black alkene mixture, 5 parts of diethyl phthalates, 8 parts of epoxidized soybean oils, 8 parts of silane coupling agents, 15 parts of acetone and 18 parts of N, N-
Polyurethane and n,N-Dimethylformamide are mixed in blender, and acetone are added into blender by dimethylformamide, in
Temperature be 70 DEG C, revolving speed be 350r/min under conditions of, be stirred to polyurethane dissolution after, obtain blank liquid, by blank liquid with
Improved silica is mixed in batch mixer, and graphene mixture is sequentially added into batch mixer, diethyl phthalate,
Epoxidized soybean oil and silane coupling agent are 80 DEG C in temperature, under conditions of revolving speed is 350r/min, after being stirred 60min, obtain
It at film liquid, will be applied in Teflon mould at film liquid, and the curing molding under the conditions of at a temperature of 90 °C, and take off film, obtained
Waterproof ventilation polyurethane film.The calcination temperature is 650 DEG C.The paraffin carbon atom number is 32.The alcoholic solvent is by second
Alcohol is mixed with octadecyl alcolol 1:3 in mass ratio, obtains alcoholic solvent.The molecular weight polyethylene glycol is 1600.The silane coupling agent is
Silane resin acceptor kh-550.
Comparative example: the polyurethane film of Shenzhen plastic cement Co., Ltd production.
1 to 4 gained polyurethane film of example and comparative example product mechanical performance are detected, the specific detection method is as follows:
Permeability: the Gurley value of permeability apparatus measurement film is used.Gurley value refers to the air of specific quantity specific
By the time required for the ventilated membrane of particular area under pressure, Gurley value is smaller, and air penetrability is higher.Sample is fixed on sample
In sample platform, cylinder is put down, measurement cylinder is read from 0~100 required time, as Gurley value.Measurement pressure is 8.5kPa, is surveyed
Examination area is 645.2mm2。
Hydrophobic performance: taking composite films to be cut into the diaphragm of 1cm × 1cm, is immersed in it respectively after weighing and fills equally
In the beaker of water, it is static for 24 hours after, take out sample, wipe dry-eye disease surface moisture with filter paper, then weigh.Using water absorption rate A
(%) characterizes its water imbibition.A(%)=(W1-W0)/W0.W in formula0For the quality before sample water suction, W1For the quality after sample water suction.
Specific testing result is as shown in table 1:
Table 1: performance detection table
| Detection content | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example |
| Water absorption rate/% | 93.8 | 157.2 | 161.2 | 154.8 | 202.2 |
| Gurley value | 354 | 435 | 452 | 443 | 558 |
By 1 testing result of table it is found that present invention gained waterproof ventilation polyurethane film has excellent permeability and hydrophobicity
Energy.
Claims (7)
1. a kind of preparation method of waterproof ventilation polyurethane film, it is characterised in that specific preparation step are as follows:
(1) by ethyl alcohol, 1.6:1.0~2.0:1.0 is mixed by volume with water, and is added the 12 of 0.2~0.3 times of ethyl alcohol volume
Amine after being stirred, obtains alcohol mixeding liquid, and ethyl orthosilicate is mixed with alcohol mixeding liquid 1:4~1:8 in mass ratio, stirring
It after hydrolysis, filters, dry, calcining obtains pretreated silicon dioxide, by pretreated silicon dioxide and paraffin 1:3~1:5 in mass ratio
Mixing and ball milling obtains improved silica；
(2) graphene oxide dispersion is mixed with graphene microchip 100:5~100:8 in mass ratio, after ultrasonic disperse, hydro-thermal
Processing, obtains pretreating graphite alkene mixture, pretreating graphite alkene mixture dry, pulverize sieving, obtain graphene mixture；
(3) graphene mixture is mixed with alcoholic solvent 1:30~1:40 in mass ratio, after vacuum pressure maintaining processing, is down to room temperature,
Obtain modified graphene mixture；
(4) according to parts by weight, it successively weighs: 60~70 parts of polyurethane, 10~15 parts of polyethylene glycol, 12~18 parts of modified dioxies
SiClx, 18~20 parts of modified graphene mixtures, 3~5 parts of diethyl phthalates, 5~8 parts of epoxidized soybean oils, 3~8 parts
Silane coupling agent, 10~15 parts of acetone and 15~18 parts of n,N-Dimethylformamide, by polyurethane and n,N-Dimethylformamide
Mixing, and acetone is added, after being stirred, blank liquid is obtained, blank liquid is mixed with improved silica, and modified graphite is added
Alkene mixture, diethyl phthalate, epoxidized soybean oil and silane coupling agent after being stirred, obtain into film liquid, will be at film liquid
It is applied in Teflon mould, and the molding that is heating and curing, takes off film, obtain waterproof ventilation polyurethane film.
2. a kind of preparation method of waterproof ventilation polyurethane film according to claim 1, it is characterised in that: step (1)
The calcination temperature is 500~650 DEG C.
3. a kind of preparation method of waterproof ventilation polyurethane film according to claim 1, it is characterised in that: step (1)
The paraffin carbon atom number is 24~32.
4. a kind of preparation method of waterproof ventilation polyurethane film according to claim 1, it is characterised in that: step (2)
The graphene oxide dispersion is to mix graphene oxide with water 1:100~1:120 in mass ratio, and ultrasonic disperse obtains oxygen
Graphite alkene dispersion liquid.
5. a kind of preparation method of waterproof ventilation polyurethane film according to claim 1, it is characterised in that: step (3)
The alcoholic solvent is to mix ethyl alcohol with octadecyl alcolol 1:2~1:3 in mass ratio, obtains alcoholic solvent.
6. a kind of preparation method of waterproof ventilation polyurethane film according to claim 1, it is characterised in that: step (4)
The molecular weight polyethylene glycol is 1000~1600.
7. a kind of preparation method of waterproof ventilation polyurethane film according to claim 1, it is characterised in that: step (4)
The silane coupling agent is silane resin acceptor kh-550, any one in silane coupling agent KH-560 or Silane coupling reagent KH-570
Kind.
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