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ZnO-chitosan grafted polylactic acid mulching film

A technology of chitosan and polylactic acid, which is applied in plant protection, application, gardening, etc., can solve the problems of poor impact resistance, hard and brittle polylactic acid texture, and sensitive gaps, etc., and achieve the effect of improving dispersion

Inactive Publication Date: 2021-12-14
甘德彬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polylactic acid has the disadvantages of hard and brittle texture, poor impact resistance, notch sensitivity and low notch impact strength, which greatly restricts its application.

Method used

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  • ZnO-chitosan grafted polylactic acid mulching film
  • ZnO-chitosan grafted polylactic acid mulching film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ZnO-chitosan grafted polylactic acid film is characterized in that the film comprises the following raw materials in parts by weight: 40 parts of polylactic acid, 80 parts of ZnO-chitosan, 0.15 part of liquid paraffin, acetyl tri-n-butyl citrate 2 parts, 0.15 parts of UV327, 2 parts of trisodium phosphate.

[0033] The preparation method of ZnO-chitosan comprises the steps:

[0034] (1) Preparation of modified nano-zinc oxide: place nano-zinc oxide and γ-glycidyloxypropyltrimethoxysilane in absolute ethanol, nano-zinc oxide, γ-glycidyloxypropyltrimethoxysilane The molar ratio is 1:1.1, stirred and dissolved under the protection of argon, and refluxed at 70°C for 5 hours, the reaction liquid is filtered, the obtained solid is washed and dried, and modified nano-zinc oxide is obtained;

[0035] (2) Preparation of phthalylated chitosan: Take appropriate amount of chitosan and phthalic anhydride in the reaction kettle, the molar ratio of chitosan and phthalic anhydride is ...

Embodiment 2

[0044] ZnO-chitosan grafted polylactic acid film is characterized in that the film comprises the following raw materials in parts by weight: 50 parts of polylactic acid, 100 parts of ZnO-chitosan, 1.5 parts of liquid paraffin, acetyl tri-n-butyl citrate 3 parts, UV327 1.5 parts, trisodium phosphate 4 parts.

[0045] The preparation method of ZnO-chitosan comprises the steps:

[0046] (1) Preparation of modified nano-zinc oxide: place nano-zinc oxide and γ-glycidyloxypropyltrimethoxysilane in absolute ethanol, nano-zinc oxide, γ-glycidyloxypropyltrimethoxysilane The molar ratio is 1:1.2, stirred and dissolved under the protection of argon, and refluxed at 75°C for 5 hours, the reaction solution is filtered, the obtained solid is washed and dried, and modified nano-zinc oxide is obtained;

[0047] (2) Preparation of phthalylated chitosan: Take appropriate amount of chitosan and phthalic anhydride in the reaction kettle, the molar ratio of chitosan and phthalic anhydride is 1:3....

Embodiment 3

[0056] ZnO-chitosan grafted polylactic acid film is characterized in that the film comprises the following raw materials in parts by weight: 40 parts of polylactic acid, 100 parts of ZnO-chitosan, 0.15 part of liquid paraffin, acetyl tri-n-butyl citrate 3 parts, 0.15 parts of UV327, 4 parts of trisodium phosphate.

[0057] The preparation method of ZnO-chitosan comprises the steps:

[0058] (1) Preparation of modified nano-zinc oxide: place nano-zinc oxide and γ-glycidyloxypropyltrimethoxysilane in absolute ethanol, nano-zinc oxide, γ-glycidyloxypropyltrimethoxysilane The molar ratio is 1:1.1, stirred and dissolved under the protection of argon, and refluxed at 75°C for 5 hours, the reaction liquid is filtered, the obtained solid is washed and dried, and modified nano-zinc oxide is obtained;

[0059] (2) Preparation of phthalylated chitosan: Take appropriate amount of chitosan and phthalic anhydride in the reaction kettle, the molar ratio of chitosan and phthalic anhydride is...

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Abstract

The invention provides a ZnO-chitosan grafted polylactic acid mulching film, and relates to the technical field of mulching films. The mulching film comprises the following raw materials by weight: 40-50 parts of polylactic acid, 80-100 parts of ZnO-chitosan, 0.15-1.5 parts of a lubricant, 2-3 parts of a plasticizer, 0.15-1.5 parts of an ultraviolet absorbent, and 2-4 parts of a pH regulator. According to the invention, chitosan is grafted on the surface of ZnO to increase the dispersibility of ZnO in a polymer, then ZnO-chitosan is grafted with polylactose, and ZnO-chitosan-polylactic acid is used as a base material to be mixed with other auxiliaries to prepare the mulching film, so the tensile property, elongation at break and impact strength of the mulching film are increased, and the biodegradability of polylactic acid is not affected.

Description

technical field [0001] The invention relates to the technical field of mulching films, in particular to ZnO-chitosan grafted polylactic acid mulching films. Background technique [0002] Thin film materials refer to thin metal or organic layers with a thickness ranging from a single atom to a few millimeters. When the one-dimensional linear scale of a solid or liquid is much smaller than its other two-dimensional scale, we call such a solid or liquid a membrane. The film has good toughness, moisture resistance and heat sealing performance, and is widely used. Film types include biaxially oriented polypropylene film (BOPP), low-density polyethylene film (LDPE), polyester film (PET), nylon film (PA), cast polypropylene film (CPP) and aluminized film. The film material has the same structure as the paper material, the only difference is that the surface of the material needs to be treated. [0003] Plastic products have the advantages of strong stability, small specific grav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L87/00C08L91/06C08K5/11C08K3/32C08G83/00C08J5/18A01G13/02
CPCC08J5/18C08G83/001A01G13/0275C08J2387/00C08J2491/06C08K5/11C08K2003/324
Inventor 甘德彬
Owner 甘德彬
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