Effects of Silica Content on the Properties of Poly(N-isopropylacrylamide) / Silica Nanocomposite Hydrogels
Lili Wu, Chao Zhang, Chaocan Zhang
Available Online April 2017.
- https://doi.org/10.2991/iceesd-17.2017.192How to use a DOI?
- Poly(N-isopropylacrylamide); Silica sol; Composite hydrogels; Mechanical; Gelation; Thermosensitive.
- Poly(N-isopropylacrylamide) is a representative thermosensitive polymer, whose hydrogels have broad applications. But poly(N-isopropylacrylamide) hydrogels are weak and brittle. To get higher strength hydrogels, in this paper, silica sol was utilized as nanoparticle reinforcer source to construct poly(N-isopropylacrylamide)/silica nanocomposite hydrogels by in situ polymerization. By means of scanning electron microscopy, nano-silica was found dispersed evenly on the surface of PNIPA polymer network. Encouragingly, the compression strength of composite hydrogels have been enhanced more than 60% owing to the introduction of nano-silica. Obviously, the more silica sol this composite hydrogels contain ,the longer gelation time they obtain. Compared to pure PNIPA hydrogels, nanocomposite hydrogels have faster deswelling speed at high temperature. And the lower critical solution temperature of nanocomposite hydrogels with different content of silica hydrogels was found between 33.5 oC to 34.5 oC. Because silica sol is facial to composite with hydrogel, this study provides a simple way for nanocomposite reinforced hydrogels preparation.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Lili Wu AU - Chao Zhang AU - Chaocan Zhang PY - 2017/04 DA - 2017/04 TI - Effects of Silica Content on the Properties of Poly(N-isopropylacrylamide) / Silica Nanocomposite Hydrogels BT - 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017) PB - Atlantis Press SN - 2352-5401 UR - https://doi.org/10.2991/iceesd-17.2017.192 DO - https://doi.org/10.2991/iceesd-17.2017.192 ID - Wu2017/04 ER -