Method for preparing cellulose nanocrystal gel bionic skin sensing material with electric-conducting and self-healing functions

A sensing material, cellulose technology, applied in the field of preparation of cellulose nanocrystal mixed hydrogel, can solve the problems of large brittleness, and achieve a large surface area, stable electrical conductivity, mild healing conditions, excellent electrical conductivity and self-healing properties. Effect

Inactive Publication Date: 2019-06-18
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in smart electronic components, non-covalent bonds of conductive polymers lead to agglomeration and its high brittleness is an important factor restricting the development of conductive polymers (CN107964106A)

Method used

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  • Method for preparing cellulose nanocrystal gel bionic skin sensing material with electric-conducting and self-healing functions
  • Method for preparing cellulose nanocrystal gel bionic skin sensing material with electric-conducting and self-healing functions
  • Method for preparing cellulose nanocrystal gel bionic skin sensing material with electric-conducting and self-healing functions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 5.2g of pyrrole to 2g of CNC aqueous suspension (1wt%) and mix evenly, then add 50ml of HCl (1mol / L), stir magnetically in -1°C water for 1h, and dissolve 3.6g of FeCl 3 The aqueous solution was added to the CNC mixed suspension, placed in -1°C water and magnetically stirred for 2 hours, and the obtained product was washed to neutrality, and 0.8g of borax (Na 2 B 4 o 7 10H 2 O) Dissolve the powder in 20ml of CNC mixed suspension product, stir continuously at room temperature for 20min, slowly add 3.0g of PVA powder into the stirred aqueous solution, after the PVA powder is completely swollen, heat the solution to 95°C and stir for 3h, with As the temperature rises, the PVA powder begins to dissolve, and the mixture gradually becomes viscous. After the PVA is completely dissolved, a well-dispersed CNC mixed solution is formed. As the temperature decreases, the solution begins to exhibit viscoelastic properties. The solution is further slowly cooled to room temperat...

Embodiment 2

[0032] Add 1g of aniline to 0.1g of CNC aqueous suspension (0.1wt%) and mix well, then add 10ml of HMnO 4 (0.1mol / L), followed by magnetic stirring in -5°C water for 2h, 0.1g iron sulfate (Fe 2 (SO 4 ) 3 ) was added to the CNC mixed suspension, placed in -5 ° C water for 4 hours, and the obtained product was washed to neutrality, and 0.01g of titanium boride (TiB 2) powder was dissolved in 10ml of CNC mixed suspension product, stirred continuously at room temperature for 40min, slowly added 0.1g of PVA powder into the stirred aqueous solution, and after the PVA powder was completely swollen, the solution was heated to 70°C and stirred for 5h, with As the temperature rises, the PVA powder begins to dissolve, and the mixture gradually becomes viscous. After the PVA is completely dissolved, a well-dispersed CNC mixed solution is formed. As the temperature decreases, the solution begins to exhibit viscoelastic properties. The solution is further slowly cooled to room temperature...

Embodiment 3

[0034] 10g thiophene was added to 5g CNC aqueous suspension (2wt%) and mixed evenly, then 20ml HClO was added 4 (2mol / L), followed by magnetic stirring in water at 0°C for 3h, adding 5g of sodium chloride (NaCl) into the CNC mixed suspension, placing it in water at 0°C for magnetic stirring for 1h, washing the obtained product with water until neutral, and 3.5g boron oxide (B 2 o 3 ) powder was dissolved in 30ml of CNC mixed suspension product, stirred continuously at room temperature for 30min, 8.0g of PVA powder was slowly added into the stirred aqueous solution, and after the PVA powder was completely swollen, the solution was heated to 100°C and stirred for 7h, with As the temperature rises, the PVA powder begins to dissolve, and the mixture gradually becomes viscous. After the PVA is completely dissolved, a well-dispersed CNC mixed solution is formed. As the temperature decreases, the solution begins to exhibit viscoelastic properties. The solution is further slowly cool...

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Abstract

The invention provides a method for preparing a cellulose nanocrystal gel bionic skin sensing material with electric-conducting and self-healing functions. The method comprises the following steps: adding a conductive polymer monomer to a cellulose nanocrystal (CNC) suspension mixed with an acid, adding and dissolving an appropriate amount of different valence metal salts, carrying out in-situ oxidative polymerization to generate conductive CNC, then adding an appropriate amount of a boron compound and an appropriate amount of polyvinyl alcohol (PVA), and preparing the cellulose nanocrystal gel bionic skin sensing material with electric-conducting and self-healing functions under high temperature conditions. The cellulose nanocrystal gel bionic skin sensing material combines the high strength and biocompatibility of the CNC with the electrical conductivity, self-healing performance and other excellent performances of the conductive polymer, has excellent stretchability and plasticity,and has broad application prospects in fields of bionic robots, bio-sensing, flexible bionic skin sensors and supercapacitors.

Description

technical field [0001] The invention relates to a preparation method of a cellulose nanocrystal mixed hydrogel, in particular to a preparation method of a cellulose nanocrystal gel biomimetic skin sensing material with both conductivity and self-healing. Background technique [0002] Artificial intelligence and bionic robots are the result of the progress of modern human science and technology, which greatly improves production efficiency and quality, and makes human life more convenient because of it. One of the key technologies is self-healing conductive bionic skin sensor Material design and development. Cellulose nanocrystalline gel material with porous structure is an ideal choice for biomimetic skin sensing materials, which has the advantages of good biocompatibility and fast capture of weak tactile signals. [0003] Cellulose nanocrystal gel material is a gel constructed by compounding cellulose nanocrystal and other polymers. The article "Cellulose nanocrystals and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08L1/04C08L29/04C08L79/02C08L65/00
Inventor 余厚咏唐峰宋美丽周颖
Owner ZHEJIANG SCI-TECH UNIV
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