리싸이클 PET 부직포의 실리카졸과 실란 커플링제를 이용한 발수성 부여 연구 = A Study on Imparting Water Repellency to Recycled PET Nonwoven Fabrics Using Silica Sol and Silane Coupling Agent

다국어 초록 (Multilingual Abstract)

In this study, silica sol and silane coupling agent hexadecyl trimethoxysilane(HDTMS) were used to improve the surface roughness of the recycled PET nonwoven fabricsto impart water repellency of the nonwoven fabrics. The effects of silica sol and silanecoupling agent treatment on the surface morphology, chemical structure, surface roughnessand water repellency of the recycled PET nonwoven fabrics were examined. As resultsof SEM observation, the silica particles showed a uniform distribution on the surface at lowconcentration of silane coupling agent, and with an increase of concentration of silanecoupling agent, more agglomeration of the particles occurred. FT-IR results showed thespecific peaks at 3,000, 1,000 and 791 cm-1 due to the axial deformation of Si-OH, Si-O-Siand Si-C bond, respectively. Surface roughness of recycled PET nonwoven fabrics increasedby treatment with silica sol and silane coupling agent. It is thought to be because silicanano particles generated the micro irregularities on the surface. The water contact anglewas greatly increased to 130o at 0.5% of silane coupling agent. It is thought to be due toreduction of surface free energy of the nonwoven fabrics by treatment with silica sol andsilane coupling agent. It was confirmed that silica sol and silane coupling agent treatmentis an eco-friendly surface modification method that can improve water repellency of nonwovenfabrics efficiently.