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Preparation method of bio-based degradable plastic film

A plastic film and bio-based technology, applied in physical treatment, plant fiber, fiber treatment, etc., can solve the problems of non-renewable and non-degradable hazards, and achieve the effect of retaining lignin components

Inactive Publication Date: 2022-03-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of bio-based degradable plastic film, aiming at the non-renewability of raw materials of general-purpose plastics and the serious harm to the environment caused by its own non-degradability, to provide a method that can obtain self-healing properties , Antioxidant cellulose-based degradable plastic film with good mechanical properties

Method used

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preparation example Construction

[0033] A preparation method of a bio-based degradable plastic film, comprising the following steps:

[0034] (1) Get 1 mass part of absolute dry natural color bamboo pulp fiber, add 5-20 mass parts of dilute sulfuric acid to soak, obtain pretreated bamboo pulp fiber; the mass fraction of described dilute acid is 0.5%;

[0035] (2) The above-mentioned pretreated bamboo pulp fibers are subjected to steam explosion to obtain dissociated bamboo pulp fibers. The steam explosion conditions are as follows: the steam pressure is 1.6-2.0MPa, the heating time is 5min, and the temperature is 175-200°C;

[0036] (3) The above-mentioned dissociated bamboo pulp fibers are subjected to high-pressure homogenization to obtain lignin-containing bamboo pulp cellulose microfibril suspension. The pressure of the high-pressure homogenization is 400-800 bar, and the number of cycles of high-pressure homogenization is 5 to 30 times; the mass concentration of the lignin-containing bamboo pulp cellulo...

Embodiment 1

[0044] Add 100g of absolute dry bamboo pulp fiber sample into 2000ml mass fraction of 0.5% dilute sulfuric acid and soak to obtain the pretreated bamboo pulp fiber. The steam explosion is carried out at a steam pressure of 1.6MPa, a heating time of 5min, and a temperature of 175°C. To obtain dissociated bamboo pulp fibers, the dissociated bamboo pulp fibers are homogenized 30 times at a pressure of 400bar high pressure to obtain a 2% lignin-containing bamboo pulp cellulose microfibril suspension; get 100g lignin-containing bamboo pulp fibers Add 0.001g tetramethylpiperidine oxide (TEMPO) and 80g sodium bromide in the plain microfibril suspension, then add 60g sodium hypochlorite, and dropwise add 0.5mol / L sodium hydroxide to keep the pH value of the system stable at 10, to obtain Containing lignin oxidized bamboo pulp cellulose microfibril suspension, take 50g of absolute dry uncolored bamboo pulp fiber, prepare a bamboo pulp fiber suspension with a pulp concentration of 5%, ad...

Embodiment 2

[0046] Add 100g of dry bamboo pulp fiber sample into 500ml mass fraction and soak in 0.5% dilute sulfuric acid to obtain pretreated bamboo pulp fiber, and steam explosion is carried out at 2.0MPa at steam pressure, heating time is 5min, and temperature is 200°C. To obtain dissociated bamboo pulp fibers, the dissociated bamboo pulp fibers are homogenized 5 times at a pressure of 800bar high pressure to obtain a 2% lignin-containing bamboo pulp cellulose microfibril suspension; get 100g lignin-containing bamboo pulp fibers Add 0.1g tetramethylpiperidine oxide (TEMPO) and 80g sodium bromide in the plain microfibril suspension, then add 60g sodium hypochlorite, and dropwise add 0.5mol / L sodium hydroxide to keep the pH value of the system stable at 10, to obtain Containing lignin oxidized bamboo pulp cellulose microfibril suspension, take 50g of absolutely dry uncolored bamboo pulp fiber, prepare a bamboo pulp fiber suspension with a pulp concentration of 5%, add 1.5g of chlorine di...

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Abstract

The invention discloses a preparation method of a bio-based degradable plastic film, the bio-based degradable plastic film is prepared by a solution casting method, the plastic film is prepared by interlacing lignin-containing oxidized bamboo pulp cellulose microfibrils and conventional cellulose to establish an interpenetrating network type matrix structure, and borate and polyvinyl alcohol are introduced to prepare the bio-based degradable plastic film. The degradable plastic film is obtained and can replace general-purpose plastic with fossil energy as a raw material, plastic is replaced with paper, and a new technology is provided for preparation of environment-friendly materials.

Description

technical field [0001] The invention belongs to the field of biomass materials, and in particular relates to a preparation method of a bio-based degradable plastic film. Background technique [0002] Plastic has the advantages of light weight, strong stability, and low production cost. Modern social life is closely related to plastic products. However, due to the chemical stability of general-purpose plastics, a large number of discarded plastic products accumulate in the environment, causing great pressure on the ecological environment. Therefore, how to use abundant renewable and degradable resources to prepare biodegradable new materials has attracted more and more attention. [0003] Cellulose is a type of organic polymer with the most abundant reserves in nature. It has the advantages of non-toxic, non-polluting, renewable and degradable, and is a good potential raw material to replace general-purpose plastics. Bamboo has the advantages of easy cultivation, short grow...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L97/02C08L29/04C08K3/38D06M11/55D06M11/05D06M11/84D06M10/06D06M101/06
CPCC08J5/18D06M11/55D06M11/05D06M11/84D06M10/06C08J2397/02C08J2497/02C08J2429/04C08K2003/387D06M2101/06
Inventor 王文亮任肖肖王旭彪赵兴金薛艳怡夏媛媛程进宝杨菲菲王路佳关之瑾
Owner SHAANXI UNIV OF SCI & TECH
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