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Micro/nano cellulose fibril/polyglycolic acid film as well as preparation method and application thereof

A technology of nanocellulose and polyglycolic acid, which is applied in the field of degradable films to achieve good mechanical strength, rich hydroxyl groups, and improved manufacturing processes

Active Publication Date: 2020-12-04
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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  • Micro/nano cellulose fibril/polyglycolic acid film as well as preparation method and application thereof
  • Micro/nano cellulose fibril/polyglycolic acid film as well as preparation method and application thereof
  • Micro/nano cellulose fibril/polyglycolic acid film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0042] (2) getting the mass fraction that obtains in step (1) is 2.5L of pulp suspension liquid of 1%, carries out pulverization process with superfine particle pulverizer (Japan Zengxing Industrial Co., Ltd., model: MKCA6-2J), and the rotating speed is 1500r / min, the gap is -20μm, and the circulation pulverization process is 10 times to obtain the micro / nano cellulose fibrils of the water dispersion system, and then remove part of the water by centrifugation to prepare the micro / nano cellulose fibrils water dispersion with a mass fraction of 15%. liquid.

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

[0044] (4) Take 20 g of the m...

Embodiment 2

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

[0047] (1) Soak 200 g of hardwood pulp in water for 48 hours in dry weight, and then prepare a pulp suspension with a concentration of 8% by mass.

[0048] (2) getting the mass fraction that obtains in step (1) is 2.5L of pulp suspension liquid of 8%, carries out pulverization process with superfine particle pulverizer (Japan Zengxing Industry Co., Ltd., model: MKCA6-2J), and the rotating speed is 3000r / min, the gap is -10μm, and the circulation pulverization process is 30 times to obtain the micro / nano cellulose fibrils of the water dispersion system, and then part of the water is removed by centrifugation to prepare the micro / nano cellulose fibrils with a mass fraction of 10%. liquid.

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

[0050] (4) 10 g of the micro / n...

Embodiment 3

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

[0053] (1) Soak 200 g of softwood pulp in water for 48 hours, and then prepare a pulp suspension with a concentration of 4% by mass.

[0054] (2) getting the mass fraction that obtains in step (1) is 2.5L of pulp suspension liquid of 4%, carry out pulverizing process with superfine particle pulverizer (Japan Zengxing Industrial Co., Ltd., model: MKCA6-2J), and the rotating speed is 3000r / min, the gap is -10μm, and the circulation pulverization process is 20 times to obtain the micro / nano cellulose fibrils of the water dispersion system, and then remove part of the water by centrifugation to prepare the micro / nano cellulose fibrils with a mass fraction of 15%. liquid.

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

[0056] (4) 100 g of the micro / nano cellulose fib...

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Abstract

The invention discloses a micro / nano cellulose fibril / polyglycolic acid film as well as a preparation method and application thereof. The method comprises the following steps: soaking a cellulose rawmaterial in water to prepare a suspension, and carrying out ultrafine particle crushing on the suspension to obtain micro / nano cellulose fibrils to prepare a dispersion liquid; and uniformly mixing the dispersion liquid with a polyglycolic acid solution, and drying to obtain the micro / nano cellulose fibril / polyglycolic acid film. The micro / nano cellulose fibril / polyglycolic acid composite film isprepared by mixing the micro / nano cellulose fibril with the polyglycolic acid solution without using chemicals such as acid or alkali through a simple mechanical method, the preparation method is simple, the process operability is simple and convenient, and the method is suitable for industrial production. The prepared micro / nano cellulose fibril / polyglycolic acid composite film has good biodegradability and mechanical properties. The film is applied to the fields of packaging substrate reinforcement and agriculture, can reduce and eliminate white pollution, and has wide 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 its preparation method and application. Background technique [0002] Petroleum-based film products have excellent physical properties and are widely used in daily life and industrial production. However, the non-degradable properties of petroleum-based film materials have caused a lot of environmental pollution, and the non-renewable raw materials have also seriously restricted the sustainable development of the economy. With the advancement of science and technology, people pay more and more attention to environmental protection and sustainable development, and people's demand for environmentally friendly film materials is becoming more and more urgent. Polyglycolic acid (PGA) is a synthetic polymer material with good biodegradability and biocompatibility. Unlike traditional polymer materials with stable performance, such...

Claims

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Application Information

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Patent Type & Authority Applications(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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