首页  科学研究  学术论文  2014年
 
S. D. Jiang, G. Tang, Z. M. Bai, Y. Y. Wang, Y. Hu and L. Song (2014) Rsc Advances 4 3253-3262.
文章来源:SKLFS    作者:SKLFS    发布时间:2015-03-29

S. D. Jiang, G. Tang, Z. M. Bai, Y. Y. Wang, Y. Hu and L. Song (2014) Surface functionalization of MoS2 with POSS for enhancing thermal, flame-retardant and mechanical properties in PVA composites. Journal/Rsc Advances 4 3253-3262. [In English]
Web link: http://dx.doi.org/10.1039/c3ra45911j
Keywords: POLYMER NANOCOMPOSITES; CLAY NANOCOMPOSITES; FIRE HAZARDS; GRAPHENE; FLAMMABILITY; NANOSHEETS; REDUCTION; OXIDATION

Abstract: Surface functionalization of molybdenum disulfide (MoS2) was prepared by a simple reflux reaction between DITG-MoS2 and octa-vinyl polyhedral oligomeric silsesquioxanes (OvlPOSS). The structure of OvlPOSS-MoS2 was confirmed by XRD, FTIR and TEM. The SEM and TEM results of fracture surface exhibited that OvlPOSS-MoS2 was dispersed well in the matrix due to the good interfacial interaction between the functionalized MoS2 and PVA. The thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) results indicated that the thermal decomposition temperature and the glass transition temperature (T-g) were improved. Compared with pure PVA, the maximum degradation temperature of the PVA/OvlPOSS-MoS2 nanocomposites was increased by 23 degrees C, and the Tg of the PVA/OvlPOSS-MoS2 was improved by 10.2 degrees C. Meanwhile, the peak of heat release rate (pHRR) and total heat release (THR) were decreased. The tensile stress was increased by 57% with addition of 2 wt% OvlPOSS-MoS2. Moreover, the addition of OvlPOSS-MoS2 significantly decreased the gaseous products, including hydrocarbons, carbonyl compounds and carbon monoxide, which was attributed to the synergistic effect of OvlPOSS and MoS2: the adsorption and barrier effect of MoS2 inhibited the heat and gas release and promoted the formation of graphitized carbons, while OvlPOSS improved the thermal oxidative resistance of the char layer.

 
 
相关链接
S. D. Jiang, G. Tang, Z. M. Bai, Y. Y. Wang, Y. Hu and L. Song (2014) Rsc Advances 4 3253-3262.
联系我们
安徽省合肥市金寨路96号
中国科学技术大学
火灾安全全国重点实验室
邮政编码:230026
   
Tel:(+86)551 63601651
Fax:(+86)551 63601669
E-mail:sklfs@ustc.edu.cn
Copyright © 1990-2011 State Key Laboratory of Fire Science, University of Science and Technology of China
火灾科学国家重点实验室 版权所有 皖ICP备:002106505 号