Premium
Water vapor permeability and self‐cleaning properties of solvent‐free polyurethane improved by hollow nano‐TiO 2 spheres
Author(s) -
Guo Xu,
Lyu Bin,
Gao Dangge,
Cheng Kun,
Ma Jianzhong,
Yang Na,
Yu Yajin,
Zhao Shunhua,
Shi Lei,
Kou Mengnan
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49638
Subject(s) - polyurethane , materials science , ultimate tensile strength , prepolymer , composite material , photocatalysis , nano , solvent , chemical engineering , water vapor , permeability (electromagnetism) , air permeability specific surface , composite number , chemistry , organic chemistry , catalysis , biochemistry , membrane , engineering , layer (electronics)
In the synthetic leather industry, solvent‐free polyurethane film (SFPU) was poor in water vapor permeability (WVP) and washability. In this study, we introduced the hollow nano‐TiO 2 spheres (HNTSs) with high photocatalytic performance and permeability performance as well as large surface area into the SFPU film to endued its superior water vapor permeability property, self‐cleaning performance and water resistance. First of all, HNTSs were prepared via the controllable chemical route using HF for internal corrosion of solid nano‐TiO 2 spheres, and then introduced into hydroxyl prepolymer to prepare solvent‐free polyurethane/HNTSs composite film. The results of SEM, FT‐IR and UV analyses indicated HNTSs were successfully dispersed evenly into SFPU. Application experiment results showed that the addition of HNTSs with hollow structure had an important effect on the WVP, photocatalytic performance, mechanical property, the water vapor transmission rate, self‐cleaning performance as well as tensile strength were increased by 111.98%, more than 100%, and 36.368%, respectively.