A kind of high toughness polylactic acid composite material for environment-friendly tableware and preparation method thereof

A technology of composite materials and polylactic acid, which is applied in the field of high-toughness polylactic acid composite materials and its preparation, can solve the problems of poor impact strength of composite materials, unsuitable for environmental protection tableware, and no obvious modification of heat resistance, so as to improve the strength , Improve processing performance, improve the effect of interfacial bonding force

Active Publication Date: 2022-07-08
湖南钜亿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

However, the impact strength of the composite material is poor, and the heat resistance has not been significantly modified, so it is not suitable for application in environmentally friendly tableware

Method used

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  • A kind of high toughness polylactic acid composite material for environment-friendly tableware and preparation method thereof
  • A kind of high toughness polylactic acid composite material for environment-friendly tableware and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]A high-toughness polylactic acid composite material for environment-friendly tableware is composed of the following raw materials in parts by weight: 40 parts of modified polylactic acid, 60 parts of adipic acid-modified vegetable fibers, 1 part of sodium rosin, 15 parts of PEG-4000 parts, 0.8 parts of magnesium aluminum silicate and 2 parts of N,N,-ethylene bis-stearamide, and its preparation method comprises the following steps:

[0032] Add the weighed modified polylactic acid, adipic acid modified plant fiber and PEG-4000 into the high-speed mixer and stir evenly. After adding sodium rosin, stir for 0.5-1h, then add magnesium aluminum silicate and N, N,-ethylene bis-stearamide, stir for 10-15min, then add the uniformly stirred mixture into a twin-screw extruder for melting and blending, extrusion, drawing, and granulation to obtain environmentally friendly tableware high-toughness polylactic acid composite. Wherein, the extrusion temperature of the twin-screw extrud...

Embodiment 2

[0038] A high-toughness polylactic acid composite material for environment-friendly tableware is composed of the following raw materials in parts by weight: 65 parts of modified polylactic acid, 35 parts of adipic acid-modified vegetable fibers, 0.5 parts of sodium rosin, 8 parts of PEG-6000 parts, 0.5 parts of magnesium aluminum silicate and 5 parts of polyethylene wax, the preparation method is the same as that in Example 1, with specific reference to Example 1, the difference is that PEG-4000 is replaced by PEG-6000, N,N,-ethylene The base bis-stearamide (i.e. lubricant) was replaced with polyethylene wax.

[0039] The preparation method of above-mentioned modified polylactic acid comprises the following concrete steps:

[0040] (1) Add 100 parts of silicon dioxide powder to 400 parts of toluene, heat to 60°C, stir evenly, then add 1.8 parts of vinyltrimethoxysilane, slowly heat up to 110°C, and stir for 3-4 hours to prepare a surface Modified silica;

[0041] (2) The abo...

Embodiment 3

[0044] A high-toughness polylactic acid composite material for environment-friendly tableware is composed of the following raw materials in parts by weight: 50 parts of modified polylactic acid, 50 parts of adipic acid modified plant fibers, 0.8 parts of sodium rosin, 50 parts of PEG-4000 parts, 5 parts of PEG-8000, 0.7 parts of magnesium aluminum silicate and 4 parts of glycerol trihydroxystearate, the preparation method is the same as that in Example 1, specifically referring to Example 1, the difference is that PEG-4000 is replaced by PEG -4000 and PEG-8000, N,N,-ethylene bis-stearamide (ie lubricant) was replaced with glycerol trihydroxystearate.

[0045] The preparation method of above-mentioned modified polylactic acid comprises the following concrete steps:

[0046] (1) Add 100 parts of silicon dioxide powder to 400 parts of toluene, heat to 60°C, stir evenly, then add 1.2 parts of vinyltrimethoxysilane, slowly heat up to 110°C, and stir for 3-4 hours to prepare a surfa...

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Abstract

The invention discloses a high-toughness polylactic acid composite material for environment-friendly tableware and a preparation method thereof, and relates to the technical field of polylactic acid composite materials. The high-toughness polylactic acid composite material for environment-friendly tableware disclosed in the present invention is composed of the following raw materials by mass fraction: 40-65 parts of modified polylactic acid, 35-60 parts of adipic acid-modified vegetable fibers, and 0.5-60 parts of sodium rosin 1 part, 8-15 parts of polyethylene glycol, 0.5-0.8 parts of magnesium aluminum silicate, and 2-5 parts of lubricant, the invention also discloses a preparation method of the high-toughness polylactic acid composite material for environmental protection tableware. The high-toughness polylactic acid composite material provided by the present invention has excellent impact resistance, can withstand high temperature, its thermal deformation temperature exceeds 115°C, and has excellent mechanical properties, high toughness, not easy to be brittle, and prolongs the use of The composite material is non-toxic and completely biodegradable, and can be widely used in environmental protection tableware, food packaging and other fields.

Description

technical field [0001] The invention belongs to the technical field of polylactic acid composite materials, and in particular relates to a high-toughness polylactic acid composite material used for environmental protection tableware and a preparation method thereof. Background technique [0002] Today, with the theme of environment and sustainable development, environmentally friendly biodegradable polymer materials are undoubtedly favored by people and become a research hotspot in recent years. However, polylactic acid is considered to be one of the most promising alternatives to traditional plastics. Polylactic acid (PLA) is a biodegradable aliphatic polyester prepared by chemical synthesis with lactic acid formed by fermentation of corn or potato starch as raw material. The energy consumption in the production process is lower than that of petroleum-based polymers such as PP, and it is a polymer material with low environmental load. [0003] PLA is a green, environmental...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L97/02C08L93/04C08L71/02C08K13/06C08K3/34C08K3/36C08K5/523C08H8/00
CPCC08L67/04C08H8/00C08L2201/08C08L2201/06C08L2205/035C08L2205/16C08L2312/00C08L97/02C08L93/04C08L71/02C08K13/06C08K3/34C08K3/36C08K5/523Y02W90/10
Inventor 胡育强胡一帆
Owner 湖南钜亿新材料科技有限公司
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