Paper Title:
Effects of SiO2 and In Situ Crosslinking on the Swelling and Thermal Properties of Poly(vinyl Alcohol)/SiO2 Hybrid Films
  Abstract

Poly(vinyl alcohol) (PVA)/SiO2 hybrid films were prepared through hydrolysis of tetraethoxysilane (TEOS) in the presence of PVA solution, followed by the in-situ crosslinking with formaldehyde (HCHO) in acidic circumstance. The swelling and thermal gravimetric (TG) analysis was employed to evaluate the influence of SiO2 and crosslinking on the properties of the hybrid films. The results indicate that SiO2 affects effectively the swelling property and thermal stability of the hybrid films because of both the filling and crosslinking effects of SiO2. With increasing the crosslinking time, the swelling ratio at equilibrium of the hybrid films decreases. The swelling ratio at equilibrium of the hybrid films is sensitive to the SiO2 content, which is similar to the swelling ratio at equilibrium (65~75%) for PVA and PVA/SiO2 hybrid films with enough crosslinking time (12h). Compared to the film without in-situ crosslinking, the crosslinked PVA/SiO2 film showed a lower swelling ratio at equilibrium and an increased diffusion coefficient at the initial stage of swelling.

  Info
Periodical
Edited by
Deliang Chen
Pages
180-183
DOI
10.4028/www.scientific.net/AMR.266.180
Citation
J. Liu, K. Y. Tang, "Effects of SiO2 and In Situ Crosslinking on the Swelling and Thermal Properties of Poly(vinyl Alcohol)/SiO2 Hybrid Films", Advanced Materials Research, Vol. 266, pp. 180-183, 2011
Online since
June 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Xiao Yan Xiong, Miao Zhang, Xiao Ping Li, Shao Juan Yu
Abstract:Based on chaotic characteristics in vertical direction of vibrating screen sides, nonlinear methods were proposed to diagnose crack of...
1258
Authors: Ying Lin Li, Li Hui Cao, Lian He Yang
Abstract:Weft knitted pattern design is one of the most important compositions of textile CAD. Traditional pattern design has a higher request on...
576
Authors: Yong Hua Zhang, Jian Hui He, Guo Qing Zhang
Abstract:This paper aims to understand influence of the obliquity of fin ray on its motion performance. An environment-friendly propulsion system...
267
Authors: Ioana Pintilie, Francesco Moscatelli, Roberta Nipoti, Antonella Poggi, Sandro Solmi, Lars S. Løvlie, Bengt G. Svensson
Abstract:The effect of nitrogen (N) introduced by ion implantation at the SiO2/4H-SiC interface on the capacitance of the MOS capacitors is...
326
Authors: Yi Mei, Fang Ping Wang, Qiao Ying Liu, Yu Tao Mao
Abstract:To solve the thermal deformation caused by thermal load of heavy machinery gearbox, it is established that coupled analysis model to carry...
651