CN109627659A - A kind of preparation process of antibacteria degradation type medical PVC plastics - Google Patents
A kind of preparation process of antibacteria degradation type medical PVC plastics Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F259/00—Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group C08F14/00
- C08F259/02—Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group C08F14/00 on to polymers containing chlorine
- C08F259/04—Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group C08F14/00 on to polymers containing chlorine on to polymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/003—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention discloses a kind of preparation processes of antibacteria degradation type medical PVC plastics, the following steps are included: step 1, by 50-60 parts of polyvinyl chloride resins, 20-30 portions of modified starches, 1-3 parts of N, N- methylene-bisacrylamide is in 55-65 DEG C of mixture 1-2h, then it is grafted again by the gamma-ray irradiation of 30-50KGy dosage, base-material is formed, by base-material, 2-6 parts of palm waxs, 4-10 parts of modified plant powder.Modified starch and polyvinyl chloride resin are grafted by the present invention, and in modification, tapioca is first mixed with silver nitrate solution modified starch, thermoplastic starch are re-formed, then again in conjunction with titanium dioxide, by Ag+, titanium dioxide completely in conjunction with starch, then again in conjunction with polyvinyl chloride resin, the base-material antibiotic property and degradability of formation significantly improve, compared with the existing technology in using adding antibacterial raw material in raw material proportioning.
Description
Technical field
The present invention relates to PVC plastic preparation technical fields, and in particular to a kind of preparation of antibacteria degradation type medical PVC plastics
Technique.
Background technique
PVC plastic, true qualities be it is yellowish translucent, it is glossy.Transparency is better than polyethylene, polypropylene, is worse than polyphenyl
Ethylene is divided into soft, hard polyvinyl chloride with auxiliary dosage difference, and soft goods are soft and tough, and feel is viscous, and the hardness of boardy product is higher than low
Density polyethylene, and be lower than polypropylene, will appear albinism at flexion, common product: plate, tubing, sole, toy,
Door and window, wire outer skin, stationery etc. are a kind of macromolecule materials for replacing a hydrogen atom in polyethylene using a chlorine atom
Material, medical plastic industry is with its high added value, high speedup and possesses wide market potential and attracts attention, by using novel
Plastic material, medical instrument can be made safer, more environmentally friendly.
Starch is as a kind of renewable resource, and from a wealth of sources and cheap, prior thermoplastic starch has had
Complete biodegradable ability, there are no pollution to the environment, therefore starch is passed through modification in conjunction with polyvinyl chloride resin by the present invention, is prepared anti-
Bacterium degradation-type material, is more suitable for medical PVC plastics.
Existing Chinese patent literature (notification number: CN105647060B) discloses a kind of low smell PVC plastic of medical antibacterial
And preparation method thereof, the low smell PVC plastic of the medical antibacterial is prepared by the raw material of following weight parts: polyvinyl chloride resin 90-
110 parts, ester 1-5 parts of phthalic acid two, 1-5 parts of calcium stearate, 5-15 parts of zinc oxide, 3- methacryloxypropyl first
0.1-0.5 parts of base dimethoxysilane, 0.3-0.7 parts of antibacterial agent, 0.3-0.7 parts of eliminating smell agent, the PVC plastic use polyvinyl chloride resin
It is poor on degradation property in conjunction with other auxiliary agents；Existing Chinese patent literature (notification number: CN101550259B) discloses one
Kind medical multifunctional polyvinyl chloride composite material, by polyvinyl chloride (PVC) resin-oatmeal, nano modified material, plasticizer, stabilization
Agent, lubricant form, and every 100 parts by weight polyvinyl chloride (PVC) resin-oatmeal is adjacent added with 0.5~3 part of nano modified material in formula
20~40 parts of phthalic acid ester, 10~30 parts of trimellitic acid rouge, 10~30 parts of citric acid rouge, epoxidized soybean oil (ESO) 5~10
Part, 0.5~1 part of calcium stearate (CaSt), 0.1~0.5 part of zinc stearate (ZnSt), 0.1~0.5 part of silicone oil.Used in the present invention
Nano modified material is silver-carrying zinc oxide nano-particle or Ag-carried nanometer titanium dioxide, which is combined using a large amount of Organic Ingredients,
The feature of environmental protection is poor.
Summary of the invention
In view of the drawbacks of the prior art, the object of the present invention is to provide a kind of preparations of antibacteria degradation type medical PVC plastics
Technique, to solve the problems mentioned in the above background technology.
The present invention solves technical problem and adopts the following technical scheme that
The present invention provides a kind of preparation processes of antibacteria degradation type medical PVC plastics, comprising the following steps:
Step 1, by 50-60 parts of polyvinyl chloride resins, 20-30 portions of modified starches, 1-3 parts of N, N- methylene-bisacrylamide exists
55-65 DEG C of mixture 1-2h is then grafted by the gamma-ray irradiation of 30-50KGy dosage again, base-material is formed, by base-material, 2-6 parts
Palm wax, 4-10 parts of modified plant powder, 3-6 parts of the nano-ceramic powder that organises, 2-5 parts of stabilizer, it is thin to be added sequentially to ultrasonic wave
Born of the same parents' pulverizer disperses, and disperses 10-20min, is then then added in batch mixer and carries out mixing, and mixture temperature is 65-75 DEG C,
Mixing 45-55min obtains premix A；
The modified starch the preparation method comprises the following steps: 100-140 portions of tapiocas are dissolved in 100-200 parts of deionized waters,
15-25 parts of AgNO is then added3Solution, heating stirring 1-2h, is subsequently dried, and pulverizes, and obtains starch A, and starch A is added
Enter into 140-150 parts of deionized waters, 40-60 parts of citric acid tri butyl esters, 3-7 parts of divinylbenzenes are then added, then carry out
Heating water bath, bath temperature are 80-100 DEG C, and water-bath 1-3h is then dried in vacuo 30-40min, obtains starch B, and starch B is added
Enter into four mouthfuls of reaction flasks, 5-15 parts of modifying titanium dioxides, 100 parts of dehydrated alcohols are then added, stirs 20-30min, then again
Glacial acetic acid is added and adjusts pH to 5.0-6.0, then adds sodium laurate, after reacting 20min, dry, grinding；
Premix A in step 1 is added in double screw extruder by step 2, and processing temperature is 200-220 DEG C, host
Revolving speed is 330-370r/min, then squeezes out cooling check rod, air-dries pelletizing.
Preferably, modifying titanium dioxide preparation method is that titanium dioxide is added to deionization in the modified starch preparation
Ultrasonic disperse 10-20min is carried out in water, then adds aluminum stearate, sodium carbonate liquor reacts 1-2h in water-bath, water-bath
Temperature is 85-95 DEG C, and subsequent washing, ion, drying are then reacted with butanediol, polyvinylpyrrolidone at 80-100 DEG C again
20-30min is reacted in kettle, then is washed, ion, drying.
Preferably, the titanium dioxide, aluminum stearate, sodium carbonate liquor substance mass ratio be 10:(2-4): (1-3).
Preferably, the titanium dioxide, aluminum stearate, sodium carbonate liquor substance mass ratio be 10:3:2.
Preferably, the preparation method of the modified plant powder is that Plant Powder is added in reaction kettle, is then added sweet
Oil, methanol, speed of agitator rise to 100-200r/min, mixing time 20-30min, and whipping temp rises to 55-65 DEG C, then
Plant fiber, graphene are added, continues to stir 10-20min, is eventually adding divinylbenzene, continues to stir 1-2h, then again
It is dry, grinding.
Preferably, the Plant Powder, plant fiber, graphite olefinic substance mass ratio be 10:5:2.
Preferably, the plant fiber length is 10-20um.
Preferably, the plant fiber length is 15um.
Preferably, the nano-ceramic powder that organises is silane coupler modified nano-ceramic powder, the silane coupling agent
For amino silicane coupling agent KH-550.
Preferably, the stabilizer is composite calcium zinc stabilizing agent.
Compared with prior art, the present invention have it is following the utility model has the advantages that
Modified starch and polyvinyl chloride resin are grafted by the present invention, and modified starch is in modification, tapioca elder generation and silver nitrate
Solution mixing, re-forms thermoplastic starch, then again in conjunction with titanium dioxide, by Ag+, titanium dioxide completely in conjunction with starch,
Then again in conjunction with polyvinyl chloride resin, the base-material antibiotic property and degradability of formation significantly improve, middle compared with the existing technology to use
Antibacterial raw material is added in raw material proportioning, antibacterial raw material and other raw material binding forces are poor, then antibiotic property are caused to be deteriorated, addition changes
Property Plant Powder it is environmentally protective, in modification, Plant Powder in conjunction with plant fiber, graphene, plant fiber have excellent toughness,
Simultaneously through graphene in conjunction with base-material, the network system is formed, nano-ceramic powder has large specific surface area, and activity is high, by having
Machine, it is evenly dispersed while connection function to be played in the material, form structure between raw material more closely, then
Material antibiotic property, degradability, mechanical property are significantly improved.
Specific embodiment
Combined with specific embodiments below, technical scheme in the embodiment of the invention is clearly and completely described, shows
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
Embodiment 1.
A kind of preparation process of the antibacteria degradation type medical PVC plastics of the present embodiment, comprising the following steps:
Step 1, by 50 parts of polyvinyl chloride resins, 20 portions of modified starches, 1 part of N, N- methylene-bisacrylamide is in 55 DEG C of mixtures
1h is then grafted by the gamma-ray irradiation of 30-50KGy dosage again, base-material is formed, by base-material, 2 parts of palm waxs, improved plants
4 parts of powder, 3 parts of the nano-ceramic powder that organises, 2 parts of stabilizer, are added sequentially to ultrasonic cell disruptor and are dispersed, dispersion
10min is then then added in batch mixer and carries out mixing, and mixture temperature is 65 DEG C, and mixing 45min obtains premix A；
The modified starch the preparation method comprises the following steps: 100 portions of tapiocas are dissolved in 100 parts of deionized waters, be then added
15 parts of AgNO3Solution, heating stirring 1h, is subsequently dried, and pulverizes, and obtains starch A, by starch A be added to 140 parts go from
In sub- water, 40 parts of citric acid tri butyl esters, 3 parts of divinylbenzenes are then added, then carry out heating water bath, bath temperature 80
DEG C, water-bath 1h is then dried in vacuo 30min, obtains starch B, and starch B is added in four mouthfuls of reaction flasks, is then added 5 parts and changes
Property titanium dioxide, 100 parts of dehydrated alcohols, stir 20min, then add glacial acetic acid adjust pH to 5.0, then add laurel
Sour sodium, after reacting 20min, dry, grinding；
Premix A in step 1 is added in double screw extruder by step 2, and processing temperature is 200 DEG C, engine speed
For 330r/min, then squeezes out cooling check rod, air-dries pelletizing.
Modifying titanium dioxide preparation method is that titanium dioxide is added to deionization in the modified starch preparation of the present embodiment
Ultrasonic disperse 10min is carried out in water, then adds aluminum stearate, sodium carbonate liquor reacts 1h in water-bath, bath temperature
It is 85 DEG C, subsequent washing, ion, drying are then reacted in 80 DEG C of reaction kettles with butanediol, polyvinylpyrrolidone again
20min, then wash, ion, drying.
The titanium dioxide of the present embodiment, aluminum stearate, sodium carbonate liquor substance mass ratio be 10:2:1.
The preparation method of the modified plant powder of the present embodiment is that Plant Powder is added in reaction kettle, is then added sweet
Oil, methanol, speed of agitator rise to 100r/min, mixing time 20min, and whipping temp rises to 55 DEG C, then adds plant
Fiber, graphene continue to stir 10min, are eventually adding divinylbenzene, continue to stir 1h, subsequent re-dry, grinding.
The Plant Powder of the present embodiment, plant fiber, graphite olefinic substance mass ratio be 10:5:2.
The plant fiber length of the present embodiment is 10um.
The nano-ceramic powder that organises of the present embodiment is silane coupler modified nano-ceramic powder, and the silane coupling agent is
Amino silicane coupling agent KH-550.
The stabilizer of the present embodiment is composite calcium zinc stabilizing agent.
Embodiment 2.
A kind of preparation process of the antibacteria degradation type medical PVC plastics of the present embodiment, comprising the following steps:
Step 1, by 60 parts of polyvinyl chloride resins, 30 portions of modified starches, 3 parts of N, N- methylene-bisacrylamide is in 65 DEG C of mixtures
2h is then grafted by the gamma-ray irradiation of 50KGy dosage again, base-material is formed, by base-material, 6 parts of palm waxs, modified plant powder 10
Part, 6 parts of the nano-ceramic powder that organises, 5 parts of stabilizer, are added sequentially to ultrasonic cell disruptor and are dispersed, and disperse
20min is then then added in batch mixer and carries out mixing, and mixture temperature is 75 DEG C, and mixing 55min obtains premix A；
The modified starch the preparation method comprises the following steps: 140 portions of tapiocas are dissolved in 200 parts of deionized waters, be then added
25 parts of AgNO3Solution, heating stirring 2h, is subsequently dried, and pulverizes, and obtains starch A, by starch A be added to 150 parts go from
In sub- water, 60 parts of citric acid tri butyl esters, 7 parts of divinylbenzenes are then added, then carry out heating water bath, bath temperature 100
DEG C, water-bath 3h is then dried in vacuo 40min, obtains starch B, and starch B is added in four mouthfuls of reaction flasks, is then added 15 parts
Modifying titanium dioxide, 100 parts of dehydrated alcohols stir 30min, then add glacial acetic acid and adjust pH to 6.0, then add the moon
Sodium metasilicate, after reacting 20min, dry, grinding；
Premix A in step 1 is added in double screw extruder by step 2, and processing temperature is 220 DEG C, engine speed
For 370r/min, then squeezes out cooling check rod, air-dries pelletizing.
Modifying titanium dioxide preparation method is that titanium dioxide is added to deionization in the modified starch preparation of the present embodiment
Ultrasonic disperse 20min is carried out in water, then adds aluminum stearate, sodium carbonate liquor reacts 2h in water-bath, bath temperature
It is 95 DEG C, subsequent washing, ion, drying then react 20- in 100 DEG C of reaction kettles with butanediol, polyvinylpyrrolidone again
30min, then wash, ion, drying.
The titanium dioxide of the present embodiment, aluminum stearate, sodium carbonate liquor substance mass ratio be 10:4:3.
The preparation method of the modified plant powder of the present embodiment is that Plant Powder is added in reaction kettle, is then added sweet
Oil, methanol, speed of agitator rise to 200r/min, mixing time 30min, and whipping temp rises to 65 DEG C, then adds plant
Fiber, graphene continue to stir 20min, are eventually adding divinylbenzene, continue to stir 1-2h, subsequent re-dry, grinding.
The Plant Powder of the present embodiment, plant fiber, graphite olefinic substance mass ratio be 10:5:2.
The plant fiber length of the present embodiment is 20um.
The nano-ceramic powder that organises of the present embodiment is silane coupler modified nano-ceramic powder, and the silane coupling agent is
Amino silicane coupling agent KH-550.
The stabilizer of the present embodiment is composite calcium zinc stabilizing agent.
Embodiment 3.
A kind of preparation process of the antibacteria degradation type medical PVC plastics of the present embodiment, comprising the following steps:
Step 1, by 55 parts of polyvinyl chloride resins, 25 portions of modified starches, 2 parts of N, N- methylene-bisacrylamide is in 60 DEG C of mixtures
1.5h is then grafted by the gamma-ray irradiation of 40KGy dosage again, base-material is formed, by base-material, 4 parts of palm waxs, modified plant powders
7 parts, 4.5 parts of the nano-ceramic powder that organises, 3.5 parts of stabilizer, are added sequentially to ultrasonic cell disruptor and are dispersed, dispersion
15min is then then added in batch mixer and carries out mixing, and mixture temperature is 70 DEG C, and mixing 50min obtains premix A；
The modified starch the preparation method comprises the following steps: 120 portions of tapiocas are dissolved in 150 parts of deionized waters, be then added
20 parts of AgNO3Solution, heating stirring 1.5h, is subsequently dried, and pulverizes, and obtains starch A, and starch A is added to 145 parts
In ionized water, 50 parts of citric acid tri butyl esters, 5 parts of divinylbenzenes are then added, then carry out heating water bath, bath temperature 90
DEG C, water-bath 2h is then dried in vacuo 35min, obtains starch B, and starch B is added in four mouthfuls of reaction flasks, is then added 10 parts
Modifying titanium dioxide, 100 parts of dehydrated alcohols stir 25min, then add glacial acetic acid and adjust pH to 5.5, then add the moon
Sodium metasilicate, after reacting 20min, dry, grinding；
Premix A in step 1 is added in double screw extruder by step 2, and processing temperature is 210 DEG C, engine speed
For 350r/min, then squeezes out cooling check rod, air-dries pelletizing.
Modifying titanium dioxide preparation method is that titanium dioxide is added to deionization in the modified starch preparation of the present embodiment
Ultrasonic disperse 15min is carried out in water, then adds aluminum stearate, sodium carbonate liquor reacts 1.5h in water-bath, water-bath temperature
Degree is 90 DEG C, and subsequent washing, ion, drying are then reacted in 90 DEG C of reaction kettles with butanediol, polyvinylpyrrolidone again
25min, then wash, ion, drying.
The titanium dioxide of the present embodiment, aluminum stearate, sodium carbonate liquor substance mass ratio be 10:3:2.
The preparation method of the modified plant powder of the present embodiment is that Plant Powder is added in reaction kettle, is then added sweet
Oil, methanol, speed of agitator rise to 100-200r/min, mixing time 20-30min, and whipping temp rises to 55-65 DEG C, then
Plant fiber, graphene are added, continues to stir 10-20min, is eventually adding divinylbenzene, continues to stir 1-2h, then again
It is dry, grinding.
The Plant Powder of the present embodiment, plant fiber, graphite olefinic substance mass ratio be 10:5:2.
The plant fiber length of the present embodiment is 15um.
The nano-ceramic powder that organises of the present embodiment is silane coupler modified nano-ceramic powder, and the silane coupling agent is
Amino silicane coupling agent KH-550.
The stabilizer of the present embodiment is composite calcium zinc stabilizing agent.
Comparative example 1.
It is essentially identical with the material and preparation process of embodiment 3, it has only the difference is that being not added with modified starch.
Comparative example 2.
It is essentially identical with the material and preparation process of embodiment 3, it has only the difference is that being not added with graphite in plant powder modified
Alkene.
Comparative example 3.
It is essentially identical with the material and preparation process of embodiment 3, it has only the difference is that being not added with the nano-ceramic powder that organises.
Comparative example 4.
A kind of low smell PVC plastic of medical antibacterial is disclosed using Chinese patent literature (notification number: CN105647060B)
And preparation method thereof in 1 raw material of embodiment and preparation method.
Embodiment 1-3 and comparative example 1-4 performance measurements are as follows
It is obtained from embodiment 1-3 and comparative example 1-4, relative to comparative example 4, elongation at break mentions the embodiment of the present invention 3
High by 78%, Escherichia coli antibiotic property improves 8.4%, and staphylococcus aureus antibiotic property improves 7.5%, and degradation rate 24
Reach 94% the moon, degradability, which has, to be significantly improved, while raw material of the invention is environmentally protective, belongs to ep-type material.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. a kind of preparation process of antibacteria degradation type medical PVC plastics, which comprises the following steps:
Step 1, by 50-60 parts of polyvinyl chloride resins, 20-30 portions of modified starches, 1-3 parts of N, N- methylene-bisacrylamide is in 55-65
DEG C mixture 1-2h is then grafted by the gamma-ray irradiation of 30-50KGy dosage again, base-material is formed, by base-material, 2-6 portions of palms
Wax, 4-10 parts of modified plant powder, 3-6 parts of the nano-ceramic powder that organises, 2-5 parts of stabilizer, are added sequentially to supersonic cell powder
Broken machine is dispersed, and is dispersed 10-20min, is then then added in batch mixer and carries out mixing, and mixture temperature is 65-75 DEG C, mixing
45-55min obtains premix A；
The modified starch the preparation method comprises the following steps: 100-140 portions of tapiocas are dissolved in 100-200 parts of deionized waters, then
15-25 parts of AgNO is added3Solution, heating stirring 1-2h, is subsequently dried, and pulverizes, and obtains starch A, and starch A is added to
In 140-150 parts of deionized waters, 40-60 parts of citric acid tri butyl esters, 3-7 parts of divinylbenzenes are then added, then carry out water-bath
Heating, bath temperature are 80-100 DEG C, and water-bath 1-3h is then dried in vacuo 30-40min, obtains starch B, and starch B is added to
In four mouthfuls of reaction flasks, 5-15 parts of modifying titanium dioxides, 100 parts of dehydrated alcohols are then added, stirs 20-30min, then adds
Glacial acetic acid adjusts pH to 5.0-6.0, then adds sodium laurate, after reacting 20min, dry, grinding；
Premix A in step 1 is added in double screw extruder by step 2, and processing temperature is 200-220 DEG C, engine speed
For 330-370r/min, then squeezes out cooling check rod, air-dries pelletizing.
2. a kind of preparation process of antibacteria degradation type medical PVC plastics according to claim 1, which is characterized in that described
Modifying titanium dioxide preparation method is to be add to deionized water titanium dioxide to carry out ultrasonic disperse 10- in modified starch preparation
20min, then adds aluminum stearate, sodium carbonate liquor reacts 1-2h in water-bath, and bath temperature is 85-95 DEG C, then
Washing, ion, drying then react 20-30min in 80-100 DEG C of reaction kettle with butanediol, polyvinylpyrrolidone again, then
Washing, ion, drying.
3. a kind of preparation process of antibacteria degradation type medical PVC plastics according to claim 2, which is characterized in that described
Titanium dioxide, aluminum stearate, sodium carbonate liquor substance mass ratio be 10:(2-4): (1-3).
4. a kind of preparation process of antibacteria degradation type medical PVC plastics according to claim 3, which is characterized in that described
Titanium dioxide, aluminum stearate, sodium carbonate liquor substance mass ratio be 10:3:2.
5. a kind of preparation process of antibacteria degradation type medical PVC plastics according to claim 1, which is characterized in that described
The preparation method of modified plant powder is that Plant Powder is added in reaction kettle, then adds glycerol, methanol, speed of agitator rises to
100-200r/min, mixing time 20-30min, whipping temp rise to 55-65 DEG C, then add plant fiber, graphite
Alkene continues to stir 10-20min, is eventually adding divinylbenzene, continues to stir 1-2h, subsequent re-dry, grinding.
6. a kind of preparation process of antibacteria degradation type medical PVC plastics according to claim 5, which is characterized in that described
Plant Powder, plant fiber, graphite olefinic substance mass ratio be 10:5:2.
7. a kind of preparation process of antibacteria degradation type medical PVC plastics according to claim 5, which is characterized in that described
Plant fiber length is 10-20um.
8. a kind of preparation process of antibacteria degradation type medical PVC plastics according to claim 7, which is characterized in that described
Plant fiber length is 15um.
9. a kind of preparation process of antibacteria degradation type medical PVC plastics according to claim 1, which is characterized in that described
The nano-ceramic powder that organises is silane coupler modified nano-ceramic powder, and the silane coupling agent is amino silicane coupling agent KH-
550。
10. a kind of preparation process of antibacteria degradation type medical PVC plastics according to claim 1, which is characterized in that described
Stabilizer is composite calcium zinc stabilizing agent.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111619054A (en) * | 2020-06-03 | 2020-09-04 | 承德人和矿业有限责任公司 | Degradable agricultural film and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111619054A (en) * | 2020-06-03 | 2020-09-04 | 承德人和矿业有限责任公司 | Degradable agricultural film and preparation method thereof |
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Application publication date: 20190416 |