A highly sensitive conductive sensing polymer composite material with self-healing function and its preparation method and application
A technology of composite materials and polymers, applied in the field of high-sensitivity conductive sensing polymer composite materials and their preparation, can solve the problems of unrecoverable conductivity, bending of silver nanowires, low stretchability, etc., and achieve low cost , fast response time, and large resistance change rate
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Embodiment 1
[0030] 1. Preparation:
[0031] figure 1 Schematic diagram for the preparation of highly sensitive conductive sensing polymer composites with self-healing function. combine figure 1 As shown, the preparation process of the highly sensitive conductive sensing polymer composite is as follows:
[0032] 1. Disperse 5mg of cellulose nanocrystals in 1.5ml of deionized water, add a small amount of NaOH to adjust the pH value to neutral; under the stirring of the magnetic stirrer, add the concentration of 5mg / Mix 0.4 ml of the aqueous dispersion of silver nanowires in 0.4 ml, mix well, and then drop-coat it on a glass sheet; wait for the surface moisture to completely evaporate, then heat and dry at 50°C to obtain a nano-conductive layer.
[0033] 2. Dissolve 200mg of elastic polyurethane in N,N dimethylacetamide, drop-coat it on the above-mentioned nano-conductive layer, then place it in an oven with a heating temperature of 60°C for 12 hours, and then vacuum-dry it for 12 hours. ...
Embodiment 2
[0038] 1. Preparation:
[0039] 1. Disperse 5mg of cellulose nanocrystals in 1.5ml of deionized water, add a small amount of NaOH to adjust the pH to neutral; under stirring with a magnetic stirrer, add a concentration of about 1mg to the aqueous dispersion of cellulose nanocrystals drop by drop 2ml of aqueous dispersion of silver nanowires per ml, mixed well and then drop-coated on a glass sheet; after the surface moisture is completely volatilized, heat and dry at 50°C to obtain a nano-conductive layer.
[0040] 2. Dissolve 200mg of elastic polyurethane in N,N dimethylacetamide, drop-coat it on the above-mentioned nano-conductive layer, then place it in an oven with a heating temperature of 60°C for 12 hours, and then vacuum-dry it for 12 hours. Then soak the material together with the glass sheet in deionized water for 10 minutes, peel off the glass sheet and dry at 50°C for 15 minutes to obtain a highly sensitive conductive sensing polymer composite material with self-repa...
Embodiment 3
[0044] 1. Preparation:
[0045] 1. Disperse 10mg of cellulose nanocrystals in 1.5ml of deionized water, add a small amount of NaOH to adjust the pH value to neutral; under the stirring of the magnetic stirrer, add dropwise to the cellulose nanocrystals aqueous dispersion with a concentration of about 0.4ml of 5mg / ml silver nanowire aqueous dispersion was mixed well and then drop-coated on a glass sheet; after the surface moisture was completely volatilized, it was heated and dried at 50°C to obtain a nano-conductive layer.
[0046] 2. Dissolve 200mg of elastic polyurethane in N,N dimethylacetamide, drop-coat it on the above-mentioned nano-conductive layer, then place it in an oven with a heating temperature of 60°C for 12 hours, and then vacuum-dry it for 12 hours. Then soak the material together with the glass sheet in deionized water for 10 minutes, peel off the glass sheet and dry at 50°C for 15 minutes to obtain a highly sensitive conductive sensing polymer composite mater...
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Abstract
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