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A kind of micro/nano cellulose fibril/polyglycolic acid film and its preparation method and application

A technology of nanocellulose and polyglycolic acid, applied in the field of degradable films, to achieve the effect of expanding the scope of application, good transparency and rich hydroxyl groups

Active Publication Date: 2022-06-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no report on the preparation of mechanically modified micro / nanocellulose fibrils / polyglycolic acid composite films

Method used

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  • A kind of micro/nano cellulose fibril/polyglycolic acid film and its preparation method and application
  • A kind of micro/nano cellulose fibril/polyglycolic acid film and its preparation method and application
  • A kind of micro/nano cellulose fibril/polyglycolic acid film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A micro / nano cellulose fibril / polyglycolic acid film, the preparation method of which is as follows:

[0041] (1) Soak 50 g of dry weight bacterial cellulose in water for 12 hours, and then prepare a pulp suspension with a concentration of 1% by mass.

[0042] (2) Take 2.5L of the pulp suspension with a mass fraction of 1% obtained in step (1), and pulverize it with a superfine pulverizer (Japan Masuko Sangyo Co., Ltd., model: MKCA6-2J), and the rotating speed is 1500r / min, the gap is -20μm, and the cyclic grinding treatment is 10 times to obtain the micro / nanocellulose fibrils of the water dispersion system, and then part of the water is removed by centrifugation, and the water dispersion of the micro / nanocellulose fibrils with a mass fraction of 15% is prepared. liquid.

[0043] (3) Take polyglycolic acid (polymerization degree of 170) to prepare a polyglycolic acid aqueous solution with a mass fraction of 30%.

[0044] (4) Take 20 g of the micro / nano cellulose fib...

Embodiment 2

[0046]A micro / nano cellulose fibril / polyglycolic acid film, the preparation method of which is as follows:

[0047] (1) 200 g of hardwood pulp in dry weight was soaked in water for 48 hours, and then prepared into a pulp suspension with a mass percentage concentration of 8%.

[0048] (2) Take 2.5L of the pulp suspension with a mass fraction of 8% obtained in step (1), and pulverize it with a superfine pulverizer (Japan Masuko Sangyo Co., Ltd., model: MKCA6-2J), and the rotating speed is 3000r / min, the gap is -10 μm, and the cyclic pulverization process is 30 times to obtain the micro / nanocellulose fibrils of the water dispersion system, and then part of the water is removed by centrifugation, and the water dispersion of the micro / nanocellulose fibrils with a mass fraction of 10% is prepared. liquid.

[0049] (3) Polyglycolic acid (polymerization degree of 1000) is taken to prepare a polyglycolic acid ethanol solution with a mass fraction of 20%.

[0050] (4) Take 10 g of th...

Embodiment 3

[0052] A micro / nano cellulose fibril / polyglycolic acid film, the preparation method of which is as follows:

[0053] (1) 200 g of dry weight softwood pulp was soaked in water for 48 hours, and then prepared into a pulp suspension with a mass percentage concentration of 4%.

[0054] (2) Take 2.5L of the pulp suspension with a mass fraction of 4% obtained in the step (1), and pulverize it with a superfine pulverizer (Japan Masuko Sangyo Co., Ltd., model: MKCA6-2J), and the rotating speed is 3000r / min, the gap is -10 μm, and the cyclic grinding treatment is 20 times to obtain the micro / nanocellulose fibrils of the water dispersion system, and then part of the water is removed by centrifugation, and the water dispersion of the micro / nanocellulose fibrils with a mass fraction of 15% is prepared. liquid.

[0055] (3) Take polyglycolic acid (polymerization degree of 2100) to prepare a polyglycolic acid methanol solution with a mass fraction of 20%.

[0056] (4) Take 100 g of the m...

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Abstract

The invention discloses a micro / nano cellulose fibril / polyglycolic acid film, a preparation method and application thereof. The method comprises the following steps: soaking the cellulose raw material in water, preparing a suspension, pulverizing the superfine particles of the suspension to obtain micro / nano cellulose fibrils, and preparing a dispersion; mixing the dispersion with polyglycolic acid solution Mix evenly and dry to obtain micro / nano cellulose fibrils / polyglycolic acid film. The present invention prepares micro / nano cellulose fibrils by a simple mechanical method without using chemicals such as acids or alkalis, and mixes them with polyglycolic acid solutions to prepare micro / nano cellulose fibrils / polyglycolic acid composite films. The method is simple and the process is easy to operate, and the prepared micro / nano cellulose fibril / polyglycolic acid composite film has good biodegradable characteristics and mechanical properties. The film can reduce and eliminate white pollution when applied to packaging substrate enhancement and agricultural fields, and has broad social benefits and economic values.

Description

technical field [0001] The invention belongs to the field of degradable films, in particular to a micro / nano cellulose fibril / polyglycolic acid film and a preparation method and application thereof. Background technique [0002] Petroleum-based film products have excellent physical properties and are widely used in life and industrial production. However, the non-degradable characteristics of petroleum-based thin-film materials have caused a lot of environmental pollution, and at the same time, the non-renewable raw materials have also seriously restricted the sustainable development of the economy. With the advancement of science and technology, the increasing emphasis on environmental protection and sustainable development, people's demand for environmentally friendly thin-film materials is becoming more and more urgent. Polyglycolic acid (PGA) is a synthetic polymer material with good biodegradability and biocompatibility. Different from traditional polymer materials wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L1/02C08L67/04
CPCC08J5/18C08J2301/02C08J2467/04C08J2367/04C08J2401/02
Inventor 莫立焕史蓝洁李军张希
Owner SOUTH CHINA UNIV OF TECH
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