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Bioplastic special for seawater degradation and preparation method thereof

A bioplastic and seawater technology, applied in the field of degradable plastics, can solve the problem that plastics used in seawater cannot be fully degraded

Inactive Publication Date: 2019-02-22
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a kind of bioplastic specially used for seawater degradation and its preparation method, which overcomes the deficiency that the existing plastics for seawater cannot be fully degraded, and the prepared bioplastic is easy to degrade in seawater, reducing the impact on the ocean. Pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing bioplastics specially used for seawater degradation, the preparation process of which is as follows:

[0029] (1) Disperse esterified starch, chitosan, diatomaceous earth, potassium persulfate, cross-linking agent borax and soluble salt sodium chloride in water at a mass ratio of 10:2:10:0.1:0.1:5. Stir and gelatinize at 80°C for 40 minutes, then dry in a spray dryer at a pressure of 3 MPa and a temperature of 120°C to obtain soluble salt-starch composite microspheres with a particle size of 50 μm;

[0030] (2) The mass ratio of soluble salt-starch composite microspheres to stearic acid is 10:1 through the coated atomization chamber, so that the surface of the microspheres is coated with a stearic acid layer to obtain a modified soluble salt-starch composite microspheres;

[0031] (3) The modified soluble salt-starch composite microspheres and polylactic acid were blended at a mass ratio of 1:10, extruded and granulated by a twin-screw extruder t...

Embodiment 2

[0033]A method for preparing bioplastics specially used for seawater degradation, the preparation process of which is as follows:

[0034] (1) Disperse esterified starch, chitosan, diatomaceous earth, potassium persulfate, cross-linking agent borax and soluble salt sodium chloride in water at a mass ratio of 8:1:10:0.1:0.1:3, in Stir and gelatinize at 60°C for 40 minutes, then dry in a spray dryer at a pressure of 1 MPa and a temperature of 120°C to obtain soluble salt-starch composite microspheres with a particle size of 30 μm;

[0035] (2) The mass ratio of soluble salt-starch composite microspheres to stearic acid is 10:1 through the coated atomization chamber, so that the surface of the microspheres is coated with a stearic acid layer to obtain a modified soluble salt-starch composite microspheres;

[0036] (3) Blend the modified soluble salt-starch composite microspheres with polybutylene succinate at a mass ratio of 1:10, extrude and granulate through a twin-screw extru...

Embodiment 3

[0038] A method for preparing bioplastics specially used for seawater degradation, the preparation process of which is as follows:

[0039] (1) Disperse esterified starch, chitosan, diatomaceous earth, potassium persulfate, cross-linking agent borax and soluble salt sodium chloride in water at a mass ratio of 10:1:10:0.2:0.1:5. Stir and gelatinize at 80°C for 20 minutes, then dry in a spray dryer at a pressure of 2 MPa and a temperature of 150°C to obtain soluble salt-starch composite microspheres with a particle size of 30 μm;

[0040] (2) The mass ratio of soluble salt-starch composite microspheres to stearic acid is 10:1 through the coated atomization chamber, so that the surface of the microspheres is coated with a stearic acid layer to obtain a modified soluble salt-starch composite microspheres;

[0041] (3) Blend the modified soluble salt-starch composite microspheres with polycaprolactone at a mass ratio of 1:10, and extrude and granulate through a twin-screw extruder...

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Abstract

The invention discloses a bioplastic special for seawater degradation and a preparation method thereof. The preparation method comprises the following steps: melt-blending modified soluble salt-starchcompound microsphere and biodegradable plastics, and then extruding, thereby acquiring the bioplastic special for seawater degradation. According to the invention, esterified starch and soluble saltare prepared into a microsphere used for biodegradable plastics; chitosan and kieselguhr in seawater absorb water so as to swell starch and dissolve soluble salt, so that the bioplastic can be quicklysplit into nanoparticles and the degradation of bioplastic can be accelerated.

Description

technical field [0001] The invention relates to the technical field of degradable plastics, and in particular to a bioplastic specially used for seawater degradation and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of social economy, the widespread use of polymer materials, especially plastic films, has brought great convenience to people's lives. Traditional plastic film materials mainly come from petroleum, such as polyethylene and polypropylene, which also bring a series of environmental and energy problems during use. Therefore, with the dwindling of non-renewable petroleum resources and people's high attention to environmental protection issues, fully biodegradable plastic film materials are gradually used. Such as polylactic acid, polybutylene succinate, poly(butylene terephthalate-CO-butylene adipate) copolyester, polyhydroxyalkanoate, etc. are all biodegradable polyester materials , this kind of material ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L3/06C08L5/08C08K7/26
CPCC08L67/04C08L67/02C08L2201/06C08L3/06C08L5/08C08K7/26
Inventor 陈庆曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD