纳米金刚石
聚酰亚胺
材料科学
拉曼光谱
预聚物
复合材料
傅里叶变换红外光谱
聚合
聚合物
极限抗拉强度
色散(光学)
表面改性
化学工程
聚氨酯
工程类
物理
光学
钻石
图层(电子)
作者
Songlv Qin,Mingjun Cui,Shihui Qiu,Haichao Zhao,Liping Wang,Afang Zhang
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2018-01-01
卷期号:8 (7): 3694-3704
被引量:23
摘要
In this study, to achieve a homogeneous dispersion of nanodiamond (ND) in a polyimide (PI) matrix and a strong interfacial adhesion between ND and the PI matrix, a biomimetic nondestructive dopamine chemistry was employed for surface modification of ND. FTIR and Raman spectroscopy studies revealed that self-polymerization of dopamine could produce thinner polydopamine (PDA) layers on the ND surface via spontaneous oxidation and the intermolecular cross-linking reaction of PDA molecules. The structure and morphology of PDA-ND were studied by FTIR, SEM, and Raman spectroscopy, which verified the π-π interactions between PDA and ND. The facile dispersion of PDA-ND in a polyamic acid prepolymer made it possible to obtain PI/ND composites with no obvious ND aggregation. The effect of PDA-ND nanoparticles on the thermal, mechanical and tribological properties of the resulting PI/PDA-ND composites were evaluated, and the results showed that the incorporation of PDA-ND could increase the hardness, tensile strength, storage modulus, as well as the wear resistance properties. PI/PDA-ND composites prepared in this study showed that PDA-ND is a promising nanoreinforcing filler for PI composites.
科研通智能强力驱动
Strongly Powered by AbleSci AI