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Cellulose-potassium titanate composite membrane as well as preparation method and application thereof

A technology of potassium titanate and cellulose, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of high preparation cost, poor material toughness and strength, etc., and achieve good mechanical properties, simple and easy operation, good light transmission and bioavailability degradability effect

Active Publication Date: 2018-01-16
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing biodegradable natural polymer materials have the problems of high preparation cost, poor toughness and strength of the material

Method used

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  • Cellulose-potassium titanate composite membrane as well as preparation method and application thereof
  • Cellulose-potassium titanate composite membrane as well as preparation method and application thereof
  • Cellulose-potassium titanate composite membrane as well as preparation method and application thereof

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preparation example Construction

[0021] A method for preparing a cellulose-potassium titanate composite membrane provided in an embodiment of the present invention comprises the following steps:

[0022] S1. Pre-cooling the alkaline solution and potassium titanate to obtain a mixed solution, and mixing the mixed solution with cellulose to obtain a cellulose-potassium titanate mixed solution.

[0023] It should be noted that cellulose cannot be melted and dissolved in general solvents at room temperature due to the strong hydrogen bond interaction between cellulose molecules; in alkaline solutions, small molecules of urea and sodium hydroxide solvent can be combined with Cellulose forms hydrogen bonds, which are more stable at low temperatures, and then destroy the hydrogen bonds between cellulose molecules to realize the dissolution of cellulose in alkaline solution. Therefore, the present invention adopts low temperature and mixes potassium titanate and cellulose in alkaline solution, which significantly inc...

Embodiment 1

[0045] The present embodiment provides a kind of preparation method of cellulose-potassium titanate composite film, it comprises the following steps:

[0046] First, 8.0g LiOH·H 2 O and 15.0 g of urea were dissolved in 71.9 g of water to obtain 94.9 g of LiOH-urea solution, and 0.1 g of potassium titanate with a length of 7 μm and a diameter of 0.7 μm was added to the LiOH-urea solution, mechanically stirred for 1 h, then ultrasonically treated for 10 min, and placed Pre-cool in the refrigerator to -12.0°C, add 5.0 g of cellulose powder, and mechanically stir for 10 minutes to obtain a cellulose-potassium titanate mixed solution.

[0047] Next, centrifuge the cellulose-potassium titanate mixed solution at -5°C at a speed of 3000r / min for 15 minutes to defoam, pour the solution on a glass plate and control the thickness of the liquid layer to 0.2mm, The layered glass plate was gently soaked in ethanol solution for 6 hours to prepare the cellulose-potassium titanate composite h...

Embodiment 2

[0051] The present embodiment provides a kind of preparation method of cellulose-potassium titanate composite film, it comprises the following steps:

[0052] First, 8.0g LiOH·H 2 O and 15.0 g of urea were dissolved in 71.9 g of water to obtain 94.9 g of LiOH-urea solution, and 0.1 g of potassium titanate with a length of 7 μm and a diameter of 0.7 μm was added to the LiOH-urea solution, mechanically stirred for 1 h, then ultrasonically treated for 10 min, and placed Pre-cool in the refrigerator to -12.0°C, add 5.0 g of cellulose powder, and mechanically stir for 10 minutes to obtain a cellulose-potassium titanate mixed solution.

[0053] Next, centrifuge the cellulose-potassium titanate mixed solution at -5°C at a speed of 3000r / min for 15 minutes to defoam, pour the solution on a glass plate and control the thickness of the liquid layer to 0.2mm, The layered glass plate was gently soaked in ethanol solution for 6 hours to prepare the cellulose-potassium titanate composite h...

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Abstract

The invention discloses a cellulose-potassium titanate composite membrane as well as a preparation method and application thereof, and relates to the technical field of natural high-polymer materials.The preparation method of the cellulose-potassium titanate composite membrane comprises the following steps: mixing an alkaline solution and potassium titanate, and carrying out precooling treatmentto obtain a mixed solution; mixing the mixed solution with cellulose to obtain a cellulose-potassium titanate mixed solution, wherein the alkaline solution is a urea alkaline solution or a thiourea alkaline solution; regenerating the cellulose-potassium titanate mixed solution in coagulating liquid to obtain cellulose-potassium titanate composite hydrogel, and drying. The preparation method has the advantages of simple and feasible operation, high process stability and no toxicity or pollution. The prepared cellulose-potassium titanate composite membrane has tensile strength greater than or equal to 106.5 MPa, has the characteristics of good mechanical property, light transparency and biodegradability, and can be applied to preparation of a packaging material or an electrode material of acapacitor.

Description

technical field [0001] The invention relates to the technical field of natural polymer materials, and in particular to a cellulose-potassium titanate composite film, its preparation method and application. Background technique [0002] Due to the non-degradable problems of widely used plastic bags and packaging film materials, which have caused great harm to the environment, the European Union is considering a complete ban on the use of non-degradable plastic bags within the EU to prevent further deterioration of the ecological environment. At the same time, the issue of energy and sustainable development has gradually attracted attention, and the research on renewable resources has been listed as one of the 24 international frontier fields, among which natural polymers with biodegradability have become a research hotspot. Both institutions and entrepreneurs have set their sights on the research and development of related materials, and have accelerated the progress of indus...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L1/02C08K3/24H01G11/30H01G11/46
Inventor 贺盟张小丽樊润泽许剑光徐铖薛宇霆陈浩朱莹顾建军徐茜茜
Owner YANCHENG INST OF TECH
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