A high-sensitivity temperature-sensitive conductive composite fiber and its preparation method

Abstract

The invention discloses a high sensitivity temperature sensitive conductive composite fiber and a preparation method thereof. The method includes the steps of: taking the prepared poly(N-isopropyl acrylamide-co-N-hydroxymethyl acrylamide) as a spinning polymer, adopting silver nitrate as the silver particle precursor, and blending the two in a spinning solvent to obtain an electrostatic spinning solution; holding the electrostatic spinning solution in an electrostatic spinning device to conduct electrostatic spinning so as to obtain a fiber membrane, subjecting the fiber membrane to high temperature thermal crosslinking, and then reducing silver nitrate into silver nanoparticles in situ, thus obtaining the high sensitivity temperature sensitive conductive composite fiber. According to the invention, silver nitrate is added into the polymer spinning solution as the precursor of conductive silver particles, thus overcoming the defect of difficult dispersion of inorganic nanoparticles in the spinning solution. At the same time, the temperature sensitive polymer is prepared into nanofiber, thus improving the sensitivity of temperature response. After thermal crosslinking, the low temperature dissolution problem of composite fiber is effectively avoided, and the use field of fiber is enlarged.

Description

technical field [0001] The invention relates to the technical field of electrospinning, in particular to a high-sensitivity temperature-sensitive conductive composite fiber and a preparation method thereof. Background technique [0002] Flexible smart materials that can sense changes in surrounding environmental conditions, such as temperature, pressure (deformation), pH value and other parameters, have broad application prospects in wearable electronics, human implanted electronic devices, etc., especially with temperature responsiveness materials have important uses in health care. Previous research on flexible smart materials mainly focused on systems such as hydrogels and nanoparticles. The preparation of smart materials into fibers can effectively improve the mechanical stability and response sensitivity of materials. Electrospinning is a spinning technology different from the traditional spinning method. It mainly relies on high-voltage electrostatic field to deform t...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a high-sensitivity temperature-sensitive conductive composite fiber and its preparation method, aiming to solve the shortcomings of existing inorganic nanomaterials such as agglomeration and difficulty in dispersion in the spinning solution. The problem with adding surfactants

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