Method for preparing foamed polylactic acid by adopting normal-temperature foaming technology

A technology of foaming polylactic acid and polylactic acid, which is applied in the field of preparation of polylactic acid materials, can solve the problems of difficult operation, large environmental pollution, incomplete treatment requirements and environmental protection, and achieves low cost, simple preparation process, Effects that are easy to scale

Pending Publication Date: 2022-03-01
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the existing products that use traditional plastics as the main raw material cause great pollution to the environment, and th

Method used

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  • Method for preparing foamed polylactic acid by adopting normal-temperature foaming technology
  • Method for preparing foamed polylactic acid by adopting normal-temperature foaming technology
  • Method for preparing foamed polylactic acid by adopting normal-temperature foaming technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Place the purchased polylactic acid in the drying box in addition to water 24h or more; 2, remove the polylactic acid particles to dissolve in the solvent at a certain ratio of 1:10; Experiment; 4, a solution used as a liquid environment is placed in an evaporating dish; 5, the dissolved polylactic acid solution is slowly poured into ethanol at room temperature; 6, wait for 2 minutes to remove the sample, dry, test; 7, no Recycling of water ethanol.

Embodiment 2

[0030] 1. Place the purchased polylactic acid in the drying box in addition to water 24 h; 2, remove the polylactic acid particles to dissolve in the solvent at a certain ratio of 1:15; Experiment; 4, a solution used as a liquid environment is placed in an evaporating dish; 5, the dissolved polylactic acid solution is slowly poured into ethanol at room temperature; 6, wait for 2 minutes to remove the sample, dry, test; 7, no Recycling of water ethanol.

Embodiment 3

[0032] 1. Place the purchased polylactic acid in the drying box in addition to water 24h or more; 2, remove the polylactic acid particles to dissolve in the solvent at a certain ratio of 1:20; Experiment; 4, a solution used as a liquid environment is placed in an evaporating dish; 5, the dissolved polylactic acid solution is slowly poured into ethanol at room temperature; 6, wait for 2 minutes to remove the sample, dry, test; 7, no Recycling of water ethanol.

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Abstract

The invention discloses a method for preparing foamed polylactic acid by adopting a normal-temperature foaming technology, and relates to a preparation method of a novel polylactic acid material which is environment-friendly, degradable, light in weight, low in density, high in strength and high in flexibility and a novel polylactic acid foaming material prepared by four different formula embodiments. The preparation method comprises the following steps: placing purchased polylactic acid in a drying box to remove water for more than 24 hours; taking out the polylactic acid particles and dissolving the polylactic acid particles in a solvent according to a certain proportion; placing the solution used as a liquid environment in an evaporating dish; slowly pouring the dissolved polylactic acid solution into ethanol at room temperature; waiting for 2 minutes, taking out the sample, drying at room temperature, and testing; and recovering absolute ethyl alcohol. According to the invention, polylactic acid particles are dissolved by a solvent method, and the raw material treatment condition requirement is room-temperature ultrasonic treatment for 20 minutes. The method is characterized in that foamed polylactic acid is prepared by a solvent method, the operation is simple, medicines are saved, polylactic acid is used as a substrate, the overall toughness is good, the preparation process is simple, the cost is low, and the method is green, environment-friendly and easy to popularize.

Description

Technical field [0001] The present invention relates to a new type of environmentally degradable, light, low density, high strength, polylactic acid material of high strength, polylactic acid material. Background technique [0002] In numerous pollution, plastic pollution is particularly prominent. The use of disposable plastic supplies, packaging of various living appliances, and other materials prepared by plastics are a problem, and these materials are basically inseparable. There are two characteristics of plastic pollution. First, it cannot be degraded to harmless, and the other is to have a sufficient impact on only a trace of plastic products. Common methods of processing such plastic materials include incineration and buried methods. However, these processing consumption a certain amount of manpower and material resources also have an irreversible effect on the environment. If you can find a non-polluting alternative material, it will be a very good method. With the impro...

Claims

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Application Information

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IPC IPC(8): B29C44/02B29C44/34B29K67/00
CPCB29C44/02B29C44/34B29K2067/046
Inventor 韦会鸽李桂星张欢陈安利崔大鹏
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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