石墨烯/酚醛树脂纳米复合材料的热解行为

黄桂荣; 刘洪波; 杨丽; 何月德; 夏笑虹; 陈惠

石墨烯/酚醛树脂纳米复合材料的热解行为

湖南大学材料科学与工程学院, 湖南长沙 410082

基金项目: 湖南省自然科学基金(10JJ3019);湖南省研究生科研创新项目(CX2011B126).

详细信息

作者简介:
黄桂荣,博士研究生.E-mail:Bettyh168@163.com

通讯作者:
刘洪波,教授.E-mail:hndxlhb@163.com

中图分类号: O632.7⁺2
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- 文章访问数: 980
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- 被引次数: 0
出版历程
- 收稿日期: 2015-02-15
- 录用日期: 2015-11-10
- 修回日期: 2015-10-08
- 刊出日期: 2015-10-28

Pyrolysis behavior of graphene/phenolic resin composites

College of Materials Science and Engineering, Hunan University, Changsha 410082, China

Funds: Natural Science foundation of Hunan Province(10JJ3019);Postgraduate innovative research project of Hunan Province(CX2011B126).

摘要

摘要: 将氧化石墨烯与自制酚醛树脂乳液(PF)共混,经水合肼还原和热固化制备石墨烯/酚醛树脂(GNS/PF)纳米复合材料。利用AFM、SEM、FTIR和TG-DTG技术考察石墨烯对GNS/PF复合材料的形貌、结构、热稳定性和残炭率的影响。结果表明,石墨烯片均匀分布在PF中,没有发生团聚,且石墨烯片与PF间具有良好的界面结合。石墨烯薄片对PF基体强烈的吸附作用增加了PF分子链的活性和有序性,显著提高了GNS/PF纳米复合材料内PF基体的固化交联密度,进而提高了PF基体的耐热性和高温残炭率。在300~450℃条件下,纯酚醛树脂的热分解峰值温度为382.7℃,添加质量分数0.65%的GNS后,热分解峰值温度提高到408℃。在隔绝空气下900℃热处理,纯酚醛树脂的残炭率为46.2%,添加0.65%氧化石墨烯后残炭率增至59.4%,提高了13.2%。
- 酚醛树脂 /
- 氧化石墨烯 /
- 热解 /
- 残炭率
Abstract: A graphene/phenolic(GNS/PF) resin composite was prepared by blending a graphene oxide suspension with an emulsion of phenolic resin in water, followed by reduction with hydrazine and curing at 160℃. AFM, SEM, FT-IR and TG-DTG were performed to reveal the effects of graphene on the morphology, structure, thermal stability and char yield of the composites. Results showed that GNS was uniformly dispersed in the PF matrix. Strong adsorption of GNS on the PF resulted in an ordered arrangement of PF along the GNS plane. The density of crosslinks in the PF matrix was drastically increased after curing and its thermal stability and char yield were remarkably improved. The thermal decomposition peak temperature was increased from 382.7℃ for pure PF to 408℃ for the GNS/PF composites and the char yield of pure PF at 900℃ was increased from 46.2% to 59.4% for that in the composite containing 0.65 wt% graphene oxide.
- Phenolic resin /
- Graphite oxide sheet /
- Pyrolysis /
- Charring yield

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