CN104910426A - Full-degradable plastic film taking surface hydrophobically modified starch as base material and preparation method thereof - Google Patents
Full-degradable plastic film taking surface hydrophobically modified starch as base material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a full-degradable plastic film taking surface hydrophobically modified starch as a base material. The full-degradable plastic film is prepared from following raw materials, by weight, 60 to 65 parts of corn starch, 7 to 9 parts of nano montmorillonite, 0.6 to 0.7 part of peanut oil, 1.2 to 1.4 parts of tetrabutyl titanate, 12 to 14 parts of ramie straw, 30 to 35 parts of polyvinyl alcohol, 13 to 15 parts of acetyl tributyl citrate, 2 to 3 parts of liquid paraffin, 4 to 6 parts of calcium carbonate, 1 to 2 parts of glacial acetic acid, 1.5 to 2.5 parts of PE-wax, 2 to 3 parts of zinc stearate, and 2 to 3 parts of xanthan gum. The full-degradable plastic film is used for solving a problem in the prior art that mechanical properties of plastic film prepared by taking starch as the base material are poor; product with excellent mechanical properties can be prepared via improving material ratio and technology; the full-degradable plastic film possesses excellent water resistance required by food packaging bags or preservative film; complete degradation can be realized; and no environmental burden is caused.
Description
Technical field
The present invention relates to plastics film technical field, particularly a kind of with surface hydrophobicity treated starch Based Full-degradable Plastics Film that is base-material and preparation method thereof.
Background technology
In recent years, because waste plastic " white pollution " brought that be difficult to degrade is on the rise, cause global extensive concern, countries in the world have been put into effect restriction successively or have been prohibitted the use the relevant laws and regulations of non-degradable plastic packing article.On the other hand, be Nonrenewable resources owing to manufacturing the raw material oil of conventional plastic, along with a large amount of uses of the mankind will be exhausted, thus developing with renewable resources is that raw material, degradable environmental friendliness plastic are extremely urgent.
Because the minimizing day by day of petroleum resources causes cost increase, tempo slows down Macromolecular materials industry traditional at present, and meanwhile, the problem of environmental pollution that macromolecular material produces highlights day by day, causes the very big attention of society.Natural macromolecular material is a kind of resource of reusable edible, it can be decomposed by the microorganisms the material into environmentally safe, as inorganic molecules material, water and carbonic acid gas etc., and natural macromolecular material has extremely strong plasticity-, can make it to become the desired functional materials with certain special property by multiple method of modifying, utilize biodegradable starch material to prepare the focus that degradable packaging film has become countries in the world research.But starch is while raising plastics degradability, the decline of its physical and mechanical properties can be caused on the one hand, make its processing difficulties, also there is wetting ability on the other hand too strong, and the consistency between most of resins for universal use is very poor, cause the thin film mechanical performance made to decline to a great extent, block-water performance is poor, thus hinders the widespread use of starch plastic in industrialization promotion process.
Polyvinyl alcohol is a kind of broad-spectrum high molecular polymer, performance is between plastics and rubber, containing a large amount of polar group hydroxyls, toxicity is very low, molecular chain structure symmetry is regular, there is unique strong adherence, epithelium snappiness, smoothness, oil-proofness, solvent resistance, protective colloid, gas barrier performance and the water tolerance had through special processing, also there is certain biological degradability simultaneously, have in wet environment under bacterium existent condition and can resolve into water and carbonic acid gas completely in 6 months, it is Biodegradable Materials, but it is higher to degraded environmental requirement in degradation process, degradation speed is made still to seem relatively slow.
Ramie is the traditional fibre crop having distinct Chinese characteristics, and the long-term ramie planting area of China reaches about 200,000 hectares, and except ramie phloem extracts as except textile product, ramie boon is seldom utilized.The problems such as ramie boon utilization ratio is low, and process is difficult are governments at all levels and relevant department's question of common concern always, are also the problems that peasant is extremely concerned about.The by product that ramie core is processed as the large-scale production of ramie industry; important Biological resources; wherein rich cellulose, hemicellulose; its content of cellulose and the similar deciduous species of fibre shape; be the raw materials of desirable plant fiber tableware in theory, and it is rationally developed for raising ramie comprehensive value efficiently, promotes that ramie industry development is all significant.
Summary of the invention
The object of this invention is to provide a kind of with surface hydrophobicity treated starch Based Full-degradable Plastics Film that is base-material and preparation method thereof.The present invention uses the starch of the surface hydrophobicity modification of high-content as matrix, coordinate and add the strongthener of ramie boon as starch base Based Full-degradable Plastics Film, can improve thin film strength and waterproof, oil preventing performance, and cost is low, can not produce pollution; Add polyvinyl alcohol and the tributyl acetylcitrate of appropriate ratio, safety non-toxic, the fusing point of polyvinyl alcohol can be reduced, be convenient to carry out blended with starch matrix, mechanical property and the water tolerance of film can be improved.
In order to realize object of the present invention, the present invention is by following scheme implementation:
With the Based Full-degradable Plastics Film that surface hydrophobicity treated starch is base-material, be made up of the raw material of following weight part: W-Gum 60-65, nano imvite 7-9, peanut oil 0.6-0.7, tetrabutyl titanate 1.2-1.4, ramie boon 12-14, polyvinyl alcohol 30-35, tributyl acetylcitrate 13-15, whiteruss 2-3, calcium carbonate 4-6, Glacial acetic acid 1-2, PE wax 1.5-2.5, Zinic stearas 2-3, xanthan gum 2-3;
A kind of Based Full-degradable Plastics Film that is base-material with surface hydrophobicity treated starch of the present invention, be made up of following concrete steps:
(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30-40 minute, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,
(2) 80-100 object powder is made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder after mixing with calcium carbonate and be ground into nanoscale powder, mix with xanthan gum again, kneader is put into after mixing, temperature control 130 DEG C, mediate 15 minutes, release cooling, obtain ramie boon and strengthen material;
(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with whiteruss, PE wax, by colloidal mill dispersion 60-90 minute, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;
(4) after starch masterbatch, polyvinyl alcohol, tributyl acetylcitrate, Glacial acetic acid and all the other remaining components that step (3) obtains being mixed at normal temperatures, join in single screw extrusion machine, control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.
The invention has the beneficial effects as follows: the problem that the present invention is directed to the mechanical property deficiency that the plastics film made for base-material with simple starch in prior art exists, by being modified into partition ratio and technique, the product of good mechanical performance can be made, water tolerance needed for food pack or preservative film can be met good; And can degradable environment zero be born.
First the present invention carries out hydrophobizing surface process to starch, nano imvite, and sonic oscillation makes the particle diameter of starch decline, and specific surface area increases, and tetrabutyl titanate and hydrophobizing agent peanut oil effectively shield starch surface hydroxyl, form high hydrophobic layer; Simultaneously nano imvite has good gas barrier property and good far-infrared reflection, anti-aging, simultaneously heat-resisting, wear-resisting, intensity is high; Next utilizes ramie boon as the strongthener of Based Full-degradable Plastics Film, and have good water-fast, oil resistance, intensity is high, improves thin film strength, can be dissolved, and cost is low, turns waste into wealth after use by environment, can not produce pollution; Finally polyvinyl alcohol and tributyl acetylcitrate, Glacial acetic acid are coordinated, safety non-toxic, can reduce the fusing point of polyvinyl alcohol, is convenient to carry out blended with starch matrix, reaches the dual modified of product mechanical property and water tolerance.
Specific embodiments
Below by specific examples, the present invention is described in detail.
With the Based Full-degradable Plastics Film that surface hydrophobicity treated starch is base-material, be made up of the raw material of following weight part (kilogram): W-Gum 60, nano imvite 7, peanut oil 0.6, tetrabutyl titanate 1.2, ramie boon 12, polyvinyl alcohol 30, tributyl acetylcitrate 13, whiteruss 2, calcium carbonate 4, Glacial acetic acid 1, PE wax 1.5, Zinic stearas 2, xanthan gum 2;
A kind of Based Full-degradable Plastics Film that is base-material with surface hydrophobicity treated starch of the present invention, be made up of following concrete steps:
(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30 minutes, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,
(2) 80 object powder are made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder after mixing with calcium carbonate and be ground into nanoscale powder, mix with xanthan gum again, kneader is put into after mixing, temperature control 130 DEG C, mediate 15 minutes, release cooling, obtain ramie boon and strengthen material;
(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with whiteruss, PE wax, 60 minutes are disperseed by colloidal mill, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;
(4) after starch masterbatch, polyvinyl alcohol, tributyl acetylcitrate, Glacial acetic acid and all the other remaining components that step (3) obtains being mixed at normal temperatures, join in single screw extrusion machine, control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.
Product of the present invention is carried out explanation test according to the standard of GB/T 20197-2006, and the soil through 4 months buries experiment, and biological degradation rate can reach 65.1%.Carry out Mechanics Performance Testing according to GB/T 1040.3-2006, transverse tensile strength is 26.0MPa, and elongation at break is 659.76%; Longitudinal tensile strength is 23.5 MPa, and elongation at break is 456.10%, conformance with standard.
Claims (2)
1. the Based Full-degradable Plastics Film that is base-material with surface hydrophobicity treated starch, it is characterized in that, be made up of the raw material of following weight part: W-Gum 60-65, nano imvite 7-9, peanut oil 0.6-0.7, tetrabutyl titanate 1.2-1.4, ramie boon 12-14, polyvinyl alcohol 30-35, tributyl acetylcitrate 13-15, whiteruss 2-3, calcium carbonate 4-6, Glacial acetic acid 1-2, PE wax 1.5-2.5, Zinic stearas 2-3, xanthan gum 2-3.
2. a kind of Based Full-degradable Plastics Film that is base-material with surface hydrophobicity treated starch according to claim 1, is characterized in that, be made up of following concrete steps:
(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30-40 minute, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,
(2) 80-100 object powder is made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder after mixing with calcium carbonate and be ground into nanoscale powder, mix with xanthan gum again, kneader is put into after mixing, temperature control 130 DEG C, mediate 15 minutes, release cooling, obtain ramie boon and strengthen material;
(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with whiteruss, PE wax, by colloidal mill dispersion 60-90 minute, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;
(4) after starch masterbatch, polyvinyl alcohol, tributyl acetylcitrate, Glacial acetic acid and all the other remaining components that step (3) obtains being mixed at normal temperatures, join in single screw extrusion machine, control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.
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| CN105837864A (en) * | 2016-06-07 | 2016-08-10 | 内蒙古龙泽节水灌溉科技有限公司 | Fully biodegradable film and preparation method thereof |
| CN105924678A (en) * | 2016-05-05 | 2016-09-07 | 武汉纺织大学 | Degradable ramie stick transplant pot and preparing method thereof |
| CN106188770A (en) * | 2016-08-02 | 2016-12-07 | 安徽美翔塑业有限公司 | A kind of high intensity antimicrobial preservative film |
| CN106243682A (en) * | 2016-08-02 | 2016-12-21 | 安徽美翔塑业有限公司 | A kind of starch polyurethane is blended garment bag and preparation method thereof |
| CN106279780A (en) * | 2016-08-02 | 2017-01-04 | 安徽美翔塑业有限公司 | A kind of starch polyvinyl chloride resin is blended degradable patch bone bag and preparation method thereof |
| CN107189114A (en) * | 2017-06-29 | 2017-09-22 | 倪群 | A kind of preparation method of nano modification starch polyethylene alcohol complete-degradable plastic |
| CN112457615A (en) * | 2020-11-16 | 2021-03-09 | 深圳市正旺环保新材料有限公司 | Stretch-proof and easily-degradable plastic bag and preparation method thereof |
| CN115403909A (en) * | 2022-10-17 | 2022-11-29 | 安徽双津实业有限公司 | Biodegradable film and preparation method thereof |
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Application publication date: 20150916 |