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Manufacturing method and film formation method for microfibrillated cellulose

A film-forming method and chemical fiber technology, applied in pulp beating method, non-fibrous pulp addition, fiber raw material treatment, etc., can solve the problems of high energy consumption, environmental pollution, poor product performance, etc., achieve uniform distribution, reduce energy consumption, Effect of improved optical and strength properties

Active Publication Date: 2016-09-07
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, general mechanical and chemical preparations will cause problems such as high energy consumption, poor product performance and environmental pollution. Cellulase pretreatment to prepare MFC can effectively reduce preparation energy consumption, reduce pollution, and improve MFC and its film-forming performance.

Method used

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  • Manufacturing method and film formation method for microfibrillated cellulose
  • Manufacturing method and film formation method for microfibrillated cellulose
  • Manufacturing method and film formation method for microfibrillated cellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1. Analysis of enzymatic properties

[0055] (1) Drawing of standard curve: Take 8 25ml colorimetric tubes, numbered 0~7 respectively, first add 1mg / ml standard glucose solution 0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4 into 7 respectively ml, then add buffer solutions 2.0, 1.8, 1.6, 1.4, 1.2, 1.0, 0.8, 0.6ml to tubes 0-7, then add 3ml of DNS color developing solution to each test tube, develop color in boiling water bath for 5 minutes After taking it out, put it into cold water to cool immediately, add water to make the volume to 25ml, adjust the zero point of the instrument with distilled water, measure its absorbance at 530nm, and draw a standard curve.

[0056] (2) Enzyme activity determination method: use Xinhua No. 1 filter paper (6cm×1cm, 50mg) and 50mg absorbent cotton balls as substrates, add 1ml of cellulase solution and 1ml of buffer solution with a certain pH value into the colorimetric tube , and put it into a water bath at a certain temperature to react for 60...

Embodiment 2

[0103] 1. Analysis of enzymatic properties

[0104] (1) Drawing of standard curve: Take 8 25ml colorimetric tubes, numbered 0~7 respectively, first add 1mg / ml standard glucose solution 0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4 into 7 respectively ml, then add buffer solutions 2.0, 1.8, 1.6, 1.4, 1.2, 1.0, 0.8, 0.6ml to tubes 0-7, then add 3ml of DNS color developing solution to each test tube, develop color in boiling water bath for 5 minutes After taking it out, put it into cold water to cool immediately, add water to make the volume to 25ml, adjust the zero point of the instrument with distilled water, measure its absorbance at 530nm, and draw a standard curve.

[0105] (2) Enzyme activity determination method: use Xinhua No. 1 filter paper (6cm×1cm, 50mg) and 50mg absorbent cotton balls as substrates, add 1ml of cellulase solution and 1ml of buffer solution with a certain pH value into the colorimetric tube , and put it into a water bath at a certain temperature to react for 60...

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Abstract

The invention relates to a manufacturing method and film formation method for microfibrillated cellulose (MFC). In an enzyme pretreatment process, through adding cationic polymer, pretreatment effect is improved, combined with mechanical treatment, MFCs in different properties are manufactured, and the MFCs are made into films. Based on each property of the MFC and the film thereof, the green, environmental friendly, the efficient MFC and the film formation method are obtained. The method solves problems that a pure mechanical method to manufacture the MFC is large in energy consumption and not ideal in product performance, and that a chemical method and other methods have environmental pollution in a MFC manufacturing process. Manufacturing the MFC by pretreatment of cellulase consumes little energy and has little pollution. Used materials are green and environmental friendly, and are low in cost, and the cationic polymer is added, combined with RSM optimized process parameters, MFC manufacturing efficiency is effectively improved, physical and chemical properties of the MFC are improved, and film packaging performance of the MFC is improved.

Description

technical field [0001] The invention relates to the preparation of MFC and its film-forming method, in particular to a method for preparing MFC and its film-forming method by adopting cellulase in cooperation with cationic polymer pretreatment combined with a mechanical method. technical background [0002] Microfibrillated cellulose (MFC for short) is a kind of micro-nano sized cellulose, which is a cellulose product obtained after repeated and high-intensity homogenization of fibers by mechanical force, in the form of a high-swelling colloid , in general, the diameter of MFC is 20-60nm, the length is about a few microns to more than ten microns, and the aspect ratio is in the range of 100-150, so it has many excellent characteristics that ordinary cellulose products do not have, such as , crystallinity, water retention value, specific surface area, stability, tensile strength and Young's modulus, etc. In addition, MFC can also be well blended with other materials, providi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/02D21H17/00D21H17/45B29C41/24
CPCB29C41/24D21D1/02D21H17/005D21H17/45
Inventor 张正健邱丽欣陈蕴智李志红张启莲赵艳琳
Owner TIANJIN UNIV OF SCI & TECH