TY  - JOUR
PY  - 2017//
TI  - A novel polymer aerogel towards high dimensional stability, mechanical property and fire safety
JO  - ACS applied materials and interfaces
A1  - Shang, Ke
A1  - Yang, Jun-Chi
A1  - Cao, Zhijie
A1  - Liao, Wang
A1  - Wang, Yu-Zhong
A1  - Schiraldi, David A.
SP  - 22985
EP  - 22993
VL  - 9
IS  - 27
N2  - Inorganic silica-based aerogels, earliest and widely-used aerogels, have poorer mechanical properties than their organic substitutes, which are flammable. In this study, a novel polymeric aerogel with high strength, inherent flame retardancy and cost-effectiveness, which is based on poly(vinyl alcohol) (PVA) crosslinked with melamine-formaldehyde (MF), was prepared under aqueous condition with an eco-friendly freeze-drying and post-curing process. Combined with the additional rigid MF network and benifited from the resulting unique infrastructure of inter-crosslinked flexible PVA segments and rigid MF segments, PVA-based aerogels exibited a significantly decreased degradation rate, and sharply decreased peak heat release rate (PHRR) in cone calorimeter tests (by as much as 83%) compared with neat PVA. The polymer aerogels have a limiting oxygen index (LOI) as high as 36.5% and V-0 rating in UL-94 test. Furthermore, the aerogel samples exposured to harsh temperatures maintain their dimensions (< 10% change) and original mechanical strength and fire safety. Therefore, this work provide a novel stragegy for preparing pure organic polymeric aerogel materials with high mechanical strength, dimensional stability and fire safety.<p />  <p>Language: en</p>
LA  - en
SN  - 1944-8244
UR  - http://dx.doi.org/10.1021/acsami.7b06096
ID  - ref1
ER  -