期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 18, 期 7, 页码 5105-5112出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2018.15284
关键词
Graphene Oxide; Flexible Polyurethane Sponge; Layer-by-Layer Assembly; Flame Retardancy
类别
资金
- National Natural Science Foundation of China [51603091]
- Natural Science Foundation of Jiangsu Province [BK20150505]
- Opening Project of State Key Laboratory of Fire Science [HZ2015-KF07]
- Open Project Program of Key Laboratory of Eco-textiles, Ministry of Education, Jiangnan University [KLET1609]
Many current flame retardant technologies for polymeric materials contain environmentally harmful compounds, negatively impact processing and mechanical properties. In an effort to tackle these issues, graphene oxide (GO) nanocoating was deposited on the surface of polyurethane sponge (PUS) to reduce its flammability via layer-by-layer (LbL) assembly method. The results indicated that GO was evenly distributed on the surface of PUS to form GO coating PUS (PUS@ GO) composites. This coating system completely eliminated melt dripping of sponge upon exposure to the direct flame from a butane torch. According to the result of cone calorimeter test, PUS@ GO composites exhibited excellent flame retardancy. In particular, PUS@ GO composites submerging into 5 mg center dot mL(-1) GO suspension, had significant reduction in the PHRR value (53.3%), THR value (35.9%), SPR value (61.8%), TSR value (81.9%), and peak CO production value (65.8%). Such significant improvement in flame retardancy suggested that GO nanosheets were good candidate as a flame-retardant LbL coating to reduce the flammability of PUS.
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