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Nanocellulose-polymer composite hydrogel as well as preparation method and application thereof

A nanocellulose and composite hydrogel technology, applied in electromagnetic measurement devices, electric/magnetic solid deformation measurement, etc., can solve the problems of easy degradation and poor stability, and achieve the effects of simple operation, low cost and wide source.

Inactive Publication Date: 2019-08-02
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cellulose-based hydrogel materials have problems such as poor stability and easy degradation.

Method used

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  • Nanocellulose-polymer composite hydrogel as well as preparation method and application thereof
  • Nanocellulose-polymer composite hydrogel as well as preparation method and application thereof
  • Nanocellulose-polymer composite hydrogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of nanocellulose-polymer composite hydrogel, comprising the steps of:

[0039] 1) preparing a cellulose nanoparticle dispersion with a mass fraction of 10%;

[0040] 2) Add Fenton's reagent to the cellulose nanoparticle dispersion, the concentration of Fenton's reagent in the system is 30mmol / L, and stir for 5min to form the first mixed solution;

[0041] 3) Add acrylic acid and N,N'-methylenebisacrylamide to the first mixed solution, the concentration of acrylic acid in the system is 3mol / L, and the concentration of N,N'-methylenebisacrylamide in the system is 50mmol / L, stirred for 10min to form the second mixed solution;

[0042] 4) Pour the second mixed solution into a polytetrafluoro mold and keep it at 60° C. for 2 hours to obtain a nanocellulose-polymer hydrogel.

[0043] The tensile mechanical properties of the nanocellulose-polymer hydrogel prepared in this example are as follows: figure 1 As shown, compared with pure polyacrylic acid hy...

Embodiment 2

[0045] A preparation method of nanocellulose-polymer composite hydrogel, comprising the steps of:

[0046] 1) preparing a mass fraction of 3% cellulose nanofiber dispersion;

[0047] 2) Add ammonium persulfate to the cellulose nanofiber dispersion, the concentration of ammonium persulfate in the system is 20mmol / L, and stir for 5min to form the first mixed solution;

[0048] 3) Add acrylamide and N,N'-methylenebisacrylamide to the first mixed solution, the concentration of acrylamide in the system is 3mol / L, and the concentration of N,N'-methylenebisacrylamide in the system 50mmol / L, stirred for 10min to form the second mixed solution;

[0049] 4) Pour the second mixed solution into a polytetrafluoro mold and keep it at 60° C. for 4 hours to obtain a nanocellulose-polymer hydrogel hydrogel.

Embodiment 3

[0051]A preparation method of nanocellulose-polymer composite hydrogel, comprising the steps of:

[0052] 1) preparing a cellulose nanofiber dispersion with a mass fraction of 1%;

[0053] 2) Add ammonium persulfate solution to the cellulose nanofiber dispersion, the concentration of ammonium persulfate in the system is 40mmol / L, and stir for 5min to form the first mixed solution;

[0054] 3) Add acrylamide, N-isopropylacrylamide and N,N'-methylenebisacrylamide to the first mixed solution, the concentration of acrylamide in the system is 1mol / L, and N-isopropylacrylamide The concentration in the system is 1mol / L, the concentration of N,N'-methylenebisacrylamide in the system is 40mmol / L, and stirred for 10min to form the second mixed solution;

[0055] 4) Pour the second mixed solution into a polytetrafluoro mold and keep it at 60° C. for 1 hour to obtain a nanocellulose-polymer hydrogel.

[0056] The self-healing properties of the nanocellulose-polymer hydrogel prepared in ...

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Abstract

The invention discloses nanocellulose-polymer composite hydrogel as well as a preparation method and an application thereof. The preparation method of the nanocellulose-polymer composite hydrogel comprises the steps as follows: a nanocellulose dispersion and monomers are subjected to a free radical polymerization reaction under the action of an initiator and N,N'-methylene bisacrylamide to preparethe hydrogel, wherein the initiator is selected from one of potassium persulfate, ammonium persulfate and Fenton's reagents. The preparation method of the nanocellulose-polymer composite hydrogel hasthe advantages that the raw materials are widely sourced, the preparation method is simple, the reaction time is short and the like. The prepared nanocellulose-polymer composite hydrogel has good electrical conductivity, self-healing performance and mechanical properties and can be applied to the fields of flexible intelligent materials, capacitors or battery separators and the like.

Description

technical field [0001] The invention relates to the field of polymer materials. More specifically, it relates to a nanocellulose-polymer composite hydrogel and its preparation method and application. Background technique [0002] Hydrogel is a kind of soft material with a water content between 30% and 90% and can be highly swollen in water without dissolving. It has good biocompatibility and low surface friction, and some intelligent Hydrogels can sense changes in external stimuli and respond sensitively accordingly, so they have been widely used in drug release, artificial soft tissue, smart materials, sensing, and supercapacitors. Due to the poor mechanical properties of conventional hydrogels, its application is greatly limited. [0003] Cellulose is the most abundant natural polymer in nature, with an annual output of up to 2×10 12 Ton. It can be produced by photosynthesis by plants, etc., and can also be synthesized by some backpack animals and bacteria. Cellulose ...

Claims

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Application Information

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IPC IPC(8): C08F251/02C08F220/06C08F220/56C08F220/54G01B7/16
CPCC08F251/02G01B7/18C08F220/06C08F220/56C08F220/54
Inventor 吴敏鲁非雪王超黄勇
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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