Controllable Synthesis Of Functional Polystyrene Microspheres And Their Application In Functional Textiles

Micro-nano technology has played an important role in the development of multifunctional textiles.In addition to endows traditional fabrics with antibacterial,anti-ultraviolet,hydrophilic,hydrophobic properties,it also introduces electrical conductivity,thermal conductivity,electromagnetic shielding,sensing,fluorescence and other functions into textiles,greatly expanding the application field of functional textiles.Because of its large surface area,uniform particle size,high strength,good chemical activity,unique optical properties and other characteristics,Micro-nano microspheres have been continuously researched and developed in recent years,playing an increasingly important role in textile,electronics,catalysis,new energy,biomedicine and other fields,and playing an irreplaceable important position in promoting the development of science and technology and the progress of living standards.In this paper,combined with the characteristics of Micro-nano microspheres,the polystyrene microspheres with conductive and fluorescent functions were synthesized,and they were loaded on the fabric,and the functional fabric with strain sensing and anti-counterfeiting properties was prepared.The specific results are as follows:(1)Polystyrene(PS)microspheres and carboxylated polystyrene(CPS)microspheres:With styrene(St)as the monomer,azodiisobutanitrile(AIBN)as the initiator,polyvinylpyrrolidone(PVP)as the stabilizer,ethanol and water as the solvent,monodisperse PS microspheres were prepared by dispersion polymerization.By changing the content of reaction medium and stabilizer,the influence of PS microspheres on the particle size was explored.When the ratio of ethanol to water was 85:15 and the content of PVP was 15 g,the synthesized PS microspheres had the smallest particle size of 562 nm,and the dispersion coefficient was 0.127.CPS microspheres were prepared by adding acrylic acid(AA)as the second monomer and adding carboxyl group on the surface of PS spheres to make them have reactible functional groups.When AA content was 13%,the particle size regularization of CPS microspheres was the best(661.1 nm),and the dispersion coefficient was 0.128.(2)Conductive polystyrene(PS/rGO)microspheres and strain sensing fabrics: The synthesized PS microspheres were used as polymer matrix,and the self-made graphene oxide(GO)was added.The cationic surfactant octadecyl trimethyl ammonium bromide(OTAB)was used to prepare PS/GO microspheres by electrostatic self-assembly method.The polyester spandex fabric was placed in the PS/GO microsphere solution under ultrasound.Because the GO surface contains a large number of oxygen-containing groups,it is hydrophilic and helps to load it on the fabric in water-based media.PS/GO was reduced to PS/rGO conductive microspheres by ascorbic acid method,and the prepared polyester spandex fabric became conductive flexible fabric which could be used to respond to different strain changes.(3)Fluorescent polystyrene(CPS/FITC)microspheres and fluorescent fabrics: Using the synthesized CPS microspheres as polymer matrix,the fluorescent dye fluorescein isothiocyanate(FITC)was adsorbed by the cationic surfactant octadecyl trimethyl ammonium bromide(OTAB)by electrostatic self-assembly method.Finally,the CPS/FITC microspheres were loaded on the fabric to prepare fluorescent fabric.Due to its excellent water dispersion,the prepared CPS/FITC can be well dispersed in aqueous solution and is a white solution.Under ultraviolet irradiation,it shows strong yellow-green fluorescence,and has fluorescence stability at different pH values for a long time,and can maintain good fluorescence intensity.The prepared CPS/FITC fluorescent microspheres can satisfy the function of fluorescence fake detection and labeling in different environments and different fabrics,and have good detection effect on fabric anti-counterfeiting.