A kind of high-strength biodegradable plastic and preparation method thereof

A biodegradable plastic, high-strength technology, applied in the field of high-strength biodegradable plastics and its preparation, can solve the problem of simultaneous completion of toughening modification and heat-resistant modification, restrictions on the application of polylactic acid, heat-resistant modification of polylactic acid and toughening and modification problems, to achieve the effect of improving photocatalytic effect, improving degradation rate and improving mechanical properties

Active Publication Date: 2022-07-19
青岛中宝塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned related technologies, the inventors found that the heat-resistant modification and toughening modification of polylactic acid are carried out alone, and the toughening modification and heat-resistant modification are not completed simultaneously, so that the application of polylactic acid is limited.

Method used

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  • A kind of high-strength biodegradable plastic and preparation method thereof
  • A kind of high-strength biodegradable plastic and preparation method thereof
  • A kind of high-strength biodegradable plastic and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1-4

[0045] In Preparation Examples 1-4, anatase-type titanium dioxide was selected from Nanjing Hongde Nanomaterials Co., Ltd., model HDZY13; silane coupling agent was selected from Dongwanshi Changhe Chemical Co., Ltd., model KH550; polyethyleneimine was selected from Shandong Deng Nuo Chemical Co., Ltd., model PEI.

preparation example 1

[0046] Preparation Example 1: (1) ultrasonically disperse 1kg of anatase titanium dioxide in 2kg of sodium hydroxide solution with a mass fraction of 0.2%, place it at 150 ° C for hydrothermal treatment for 20h, filter, wash and dry to obtain titanium dioxide nanotube;

[0047] (2) The titanium dioxide nanotubes prepared in step (1) were added to 3 kg of methanesulfonic acid aqueous solution, heated to 80° C. in a water bath, acidified for 4 h, and then added to a mixture of 0.2 kg of toluene, 0.5 kg of silane coupling agent and 1 kg of deionized water. In the solution prepared by mixing water, the water bath is heated to 80 ° C, the temperature is kept for 6 h, and then dried to obtain aminopropylated titanium dioxide nanotubes;

[0048] (3) adding 3kg aminopropylated titanium dioxide nanotubes and 0.5kg hexamethylenetetramine to 1kg concentration of ethanolic solution in the zinc acetate of 0.01mol / L, placing at 280 ° C and heat treatment for 30min, cooling after centrifugal...

preparation example 2

[0049] Preparation Example 2: The difference from Preparation Example 1 is that the mass ratio of zinc acetate, aminopropylated titanium dioxide nanotubes and polyethyleneimine aqueous solution is 0.5:0.7:1.

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Abstract

The present application relates to the field of polymer materials, and specifically discloses a high-strength biodegradable plastic and a preparation method thereof. High-strength biodegradable plastics include the following components: polylactic acid, modified polylactic acid / polyhydroxyalkanoate blend fiber, nano-calcium carbonate masterbatch, filler, antioxidant, plasticizer, coupling agent; all The modified polylactic acid / polyhydroxyalkanoate blend fiber is prepared by the following method: (1) after drying the polylactic acid, it is mixed with polyhydroxyalkanoate and polyethylene glycol, and spun to obtain a nascent mixed fiber; (2) The nascent mixed fibers are placed in n-hexane, and nano-silica is added to prepare the blended fibers; (3) The blended fibers are placed in a coupling agent, zinc oxide-doped titanium dioxide nanotubes and deionized water. In the mixed solution, ultrasonication and drying are carried out to obtain the modified polylactic acid / polyhydroxyalkanoate blend fiber. The high-strength biodegradable plastic of the present application has the advantages of good toughness, strong heat resistance and fast degradation rate.

Description

technical field [0001] The present application relates to the technical field of polymer materials, and more particularly, to a high-strength biodegradable plastic and a preparation method thereof. Background technique [0002] Biodegradable plastics are a class of plastics that are degraded by the action of microorganisms such as bacteria, molds and algae in nature. Biodegradable plastics can be divided into safe biodegradable plastics and destructive biodegradable plastics. Destructive biodegradable plastics mainly include starch. Modified polyethylene, etc. This biodegradable plastic can only degrade large pieces of plastic into smaller plastics, the components of plastic molecules have not completely disappeared, and the degree of degradation is limited; while fully biodegradable plastics can be completely degraded, mainly composed of natural Polymers or agricultural and sideline products are produced by microbial fermentation or synthesis, mainly including PCL, PLA, PBS...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L71/02C08L89/00C08L51/06C08K3/26C08K3/36C08K9/04C08K9/06C08K7/24C08K9/12C08K3/22C08K7/26
Inventor 李清伟刘云平刘红兵
Owner 青岛中宝塑业有限公司
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