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High-density bamboo powder modified polylactic acid biodegradable plastic and preparation method thereof

A technology of biodegradable plastics and polylactic acid, which is applied in the field of high-density bamboo powder modified polylactic acid biodegradable plastics and its preparation, can solve the problems of poor interfacial compatibility between fibers and polylactic acid, high addition of bamboo powder, and mechanical properties of composite materials. Reduce and other problems, achieve the effect of improving mechanical properties and stability, saving costs, and improving mechanical properties

Active Publication Date: 2020-08-07
广东亿发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

[0003] The main purpose of the present invention is to provide a kind of high-density bamboo powder modified polylactic acid biodegradable plastics and preparation method thereof, aim to solve the interfacial compatibility of fiber and polylactic acid is relatively poor, the addition of bamboo powder is too high to cause composite material The problem of reduced mechanical properties

Method used

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  • High-density bamboo powder modified polylactic acid biodegradable plastic and preparation method thereof
  • High-density bamboo powder modified polylactic acid biodegradable plastic and preparation method thereof
  • High-density bamboo powder modified polylactic acid biodegradable plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of modified bamboo powder:

[0029] Prepare 1kg of aluminum chloride and 15kg of N,N-dimethylamide to form a mixed solution of N,N-dimethylamide / aluminum chloride; soak 5kg of bamboo powder in acetone solution for 15-24 hours, filter and freeze-dry; Soak the freeze-dried bamboo powder in dimethylacetamide solution for 3-8 hours, filter and freeze-dry; mix the freeze-dried bamboo powder with N,N-dimethylamide / aluminum chloride mixed solution evenly , the temperature of the mixed system was raised to 150° C. under nitrogen atmosphere; 2.5 kg of caprolactone was added to the mixed system, and the stirring reaction was continued for 12 hours. After the reaction was completed, centrifuged, washed and dried to obtain the modified bamboo powder.

[0030] The preparation method of bamboo powder modified polylactic acid biodegradable plastics:

[0031] Put 4.0kg polylactic acid, 3.0kg modified bamboo powder, 1.2kg starch, 0.15kg silicate, 0.35kg glycerin ...

Embodiment 2

[0033] The preparation method of modified bamboo powder:

[0034] Prepare 1kg of aluminum chloride and 17kg of N,N-dimethylamide to form a mixed solution of N,N-dimethylamide / aluminum chloride; soak 5kg of bamboo powder in acetone solution for 15-24 hours, filter and freeze-dry; Soak the freeze-dried bamboo powder in dimethylacetamide solution for 3-8 hours, filter and freeze-dry; mix the freeze-dried bamboo powder with N,N-dimethylamide / aluminum chloride mixed solution evenly , the mixed system was heated to 150° C. under a nitrogen atmosphere; 2.7 kg of caprolactone was added to the mixed system, and the stirring reaction was continued for 12 hours. After the reaction was completed, centrifuged, washed and dried to obtain the modified bamboo powder.

[0035] The preparation method of bamboo powder modified polylactic acid biodegradable plastics:

[0036] Put 4.0kg polylactic acid, 3.0kg modified bamboo powder, 1.2kg starch, 0.15kg silicate, 0.35kg glycerin and 0.1kg couplin...

Embodiment 3

[0038] The preparation method of modified bamboo powder:

[0039] Prepare 1kg of aluminum chloride and 20kg of N,N-dimethylamide to form a mixed solution of N,N-dimethylamide / aluminum chloride; soak 5kg of bamboo powder in acetone solution for 15-24 hours, filter and freeze-dry; Soak the freeze-dried bamboo powder in dimethylacetamide solution for 3-8 hours, filter and freeze-dry; mix the freeze-dried bamboo powder with N,N-dimethylamide / aluminum chloride mixed solution evenly , the mixed system was heated to 150° C. under a nitrogen atmosphere; 3.1 kg of caprolactone was added to the mixed system, and the stirring reaction was continued for 12 hours. After the reaction was completed, centrifuged, washed and dried to obtain the modified bamboo powder.

[0040] The preparation method of bamboo powder modified polylactic acid biodegradable plastics:

[0041] Put 4.0kg polylactic acid, 3.0kg modified bamboo powder, 1.2kg starch, 0.15kg silicate, 0.35kg glycerin and 0.1kg couplin...

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Abstract

The invention provides high-density bamboo powder modified polylactic acid biodegradable plastic and a preparation method thereof. The high-density bamboo powder modified polylactic acid biodegradableplastic provided by the invention comprises the following components in parts by mass: 35-60 parts of polylactic acid, 25-40 parts of modified bamboo powder, 10-15 parts of starch, 1.5-2.5 parts of silicate, 3-5 parts of glycerol and 0.5-2 parts of a coupling agent. According to the technical scheme, the bamboo powder cellulose is subjected to graft modification treatment, wherein the N, N-dimethylformamide / aluminum chloride mixed system is an initiator for graft copolymerization reaction of bamboo powder cellulose and caprolactone; hydrophilic, oleophylic and incompatible two chain segmentsare bonded together by adopting a graft copolymerization method, and the modified bamboo powder is easily crosslinked with polylactic acid under the action of a coupling agent to form a blend, so thatthe mechanical property of the bamboo-plastic composite material is improved, the use amount of polylactic acid is further reduced along with the increase of the addition amount of the bamboo powder,and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of food packaging, in particular to a high-density bamboo powder modified polylactic acid biodegradable plastic and a preparation method thereof. Background technique [0002] With the improvement of the public's awareness of environmental protection and the increasing attention to the environment and the increasing shortage of petroleum resources, the research and development of biodegradable plastics have attracted widespread attention and attention in recent years. Among them, polylactic acid (PLA) is a renewable resource-based polymer, a completely biodegradable aliphatic polyester, and one of the most successful commercialized biodegradable polymers. Polylactic acid has high strength, but its brittleness and poor heat resistance limit its application to a certain extent. In order to improve the mechanical properties of polylactic acid, bamboo fiber and plastic are organically combined to prepare bamboo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08L3/02C08K3/34
CPCC08L67/04C08L2205/03C08L2205/16C08L2201/06C08L97/02C08L3/02C08K3/34
Inventor 石美玲
Owner 广东亿发新材料科技有限公司
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