Degradable environment-friendly plastic film and its production process

A plastic film, environmental protection technology, applied in the field of degradable and environmentally friendly plastic film and its production process, can solve the problems of uneven hydrophobicity, poor dispersion of polylactic acid, uneven dispersion of hydrophobic agent, etc., to achieve uniform flame retardancy, high The effect of dispersion power

Active Publication Date: 2020-08-07
常熟市新明宇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention grafts serine through semi-saponified oil, and polymerizes the prepared hydrophobic serine and L-lactic acid at the same time, and the prepared hydrophobic composite polylactic acid matrix contains semi-saponified oil, which has high hydrophobic ability, and then makes the prepared plastic film hydrophobic Uniform dispersion, which solves the problem that the existing plastic film is directly added with a hydrophobic agent. Due to the poor dispersion performance of polylactic acid, the hydrophobic agent is unevenly dispersed in polylactic acid, resulting in uneven hydrophobicity at different positions of the prepared plastic film.
[0005] After the hydrophobic serine and L-lactic acid of the grafted vegetable oil are polymerized in the present invention, since the polymer itself contains semi-saponified oil groups, the polymer itself has a relatively high dispersibility. When the flame retardant is added to the polymer, the polymerization The flame retardant is directly dispersed by the material, so that the flame retardant performance of the prepared plastic film is uniform, which solves the problem that the existing plastic film is directly added with a flame retardant. Due to the poor dispersion performance of polylactic acid, the flame retardant in polylactic acid Uneven dispersion, resulting in uneven flame retardancy at different positions of the prepared plastic film

Method used

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  • Degradable environment-friendly plastic film and its production process
  • Degradable environment-friendly plastic film and its production process
  • Degradable environment-friendly plastic film and its production process

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The specific preparation process of hydrophobic composite polylactic acid is as follows:

[0040] Step 1: Add 200g of serine to the dimethyl sulfoxide solution, then add 620mL of triethylamine and 76g of 4-dimethylaminopyridine to it, stir evenly, add 212g of trimethylchlorosilane to it, and stir at room temperature for 25- After 27 hours, a trimethylsilane ether compound solution was obtained, and the specific reaction structural formula was as follows, and the hydroxyl group in serine could be protected by adding trimethylchlorosilane;

[0041] Step 2: Take 1 kg of vegetable oil and add it to the absolute ethanol solution, then add 31 g of sodium hydroxide solid to it, heat up to 75 ° C and stir for 2 hours, then use a separatory funnel to separate the obtained product, and take the upper layer solution, Obtain semi-saponified vegetable oil;

[0042] Step 3, add 108 g of the semi-saponified vegetable oil prepared in step 2 to 200 g of the trimethylsilyl ether compoun...

Embodiment 2

[0046] The specific preparation process of hydrophobic composite polylactic acid is as follows:

[0047] Step 1: Add 200g of serine to the dimethyl sulfoxide solution, then add 680mL of triethylamine and 78g of 4-dimethylaminopyridine to it, stir evenly, add 224g of trimethylchlorosilane to it, and stir at room temperature for 25- After 27 hours, a trimethylsilane ether compound solution was obtained, and the specific reaction structural formula was as follows, and the hydroxyl group in serine could be protected by adding trimethylchlorosilane;

[0048] Step 2: Take 1 kg of vegetable oil and add it to the absolute ethanol solution, then add 33 g of sodium hydroxide solid to it, heat up to 75 ° C and stir for 2 hours, then use a separatory funnel to separate the obtained product, and take the upper layer solution, Obtain semi-saponified vegetable oil;

[0049] Step 3: Add 114 g of the semi-saponified vegetable oil prepared in Step 2 to 200 g of the trimethylsilyl ether compoun...

Embodiment 3

[0053] The specific preparation process of the composite polylactic acid is as follows: 95g of serine and 81g of L-lactic acid are added to the reaction vessel, and 1.5L of 1,4-butanediol and 24g of stannous octoate are added to it at the same time, heated to 150°C, vacuumized, and then reacted at a constant temperature 10-12h, cooled to room temperature, filtered and washed to obtain complex polylactic acid.

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Abstract

The invention discloses a degradable environment-friendly plastic film, which comprises the following components in parts by weight: 75-80 parts of hydrophobic composite polylactic acid, 4-6 parts of composite flame retardant, 12-15 parts of liquid paraffin, dodecylbenzenesulfonate 2-3 parts of sodium bicarbonate, 1-2 parts of nano-titanium dioxide, 2-3 parts of antioxidant, 4-5 parts of plasticizer. The present invention grafts serine through semi-saponified oil, and simultaneously polymerizes the prepared hydrophobic serine and L-lactic acid, and the main chain of the prepared hydrophobic composite polylactic acid is connected by hydrophobic serine and L-lactic acid, and the branch chain is semi-saponified oil, so that the bacteria When acting, it acts on hydrophobic serine, L-lactic acid and semi-saponified oil at the same time. At the same time, because serine can provide the necessary nutrients for the growth of bacteria, the bacteria can reproduce rapidly and realize the decomposition of serine, so that serine and L- Compared with the traditional plastic film directly polymerized with L-lactic acid, the plastic film obtained by lactic acid polymerization has a faster degradation rate, and can be completely degraded within 30 days.

Description

technical field [0001] The invention belongs to the field of environment-friendly plastic preparation, and relates to a degradable environment-friendly plastic film and a production process thereof. Background technique [0002] Plastic films are widely used in greenhouses, packaging bags and other fields. In order to achieve high toughness and durability of plastic films, existing plastic films are usually made of polyethylene materials. The degradation of polyethylene plastic is very difficult and easily causes white pollution. , in order to realize the degradability, the plastic prepared by polylactic acid has been developed, the plastic prepared by polylactic acid can be decomposed into water and carbon dioxide through the action of bacteria, and the degradation ability of the plastic film can be realized, but the degradation rate is slow, and the direct use of polylactic acid In order to achieve its hydrophobicity and flame retardancy, the direct plastic film directly a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L3/10C08L91/06C08K13/02C08K3/22C08K5/42C08G63/685C08G63/85C08J5/18
CPCC08G63/6852C08G63/85C08J5/18C08J2367/04C08J2403/10C08J2491/06C08K3/2279C08K5/42C08K2003/2224C08K2003/2227C08K2003/2241C08K2201/011
Inventor 梁水明
Owner 常熟市新明宇新材料科技有限公司
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