Novel approach toward poly(butylene succinate)/single-walled carbon nanotubes nanocomposites with interfacial-induced crystallization behaviors and mechanical strength
Novel approach toward poly(butylene succinate)/single-walled carbon nanotubes nanocomposites with interfacial-induced crystallization behaviors and mechanical strength
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DOI：
10.1016/j.polymer.2011.06.006
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发表时间：
2011-07
期刊：
影响因子：
4.6
通讯作者：
L. Tan;Yiwang Chen;Weihua Zhou;Suwen Ye;Junchao Wei
中科院分区：
文献类型：
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作者：
L. Tan;Yiwang Chen;Weihua Zhou;Suwen Ye;Junchao Wei
将3-氨丙基三乙氧基硅烷与酰氯官能化的单壁碳纳米管进行酰化反应得到单壁碳纳米管（SWCNT-APTES），通过硅化和物理共混的方法制备了可生物降解的聚丁二酸丁二醇酯（PBS）/单壁碳纳米管（SWCNT）纳米复合材料。傅里叶变换红外光谱（FTIR）和核磁共振（NMR）的观察表明，PBS链共价连接到SWCNT-APTES水解。PBS/SWCNT-APTES纳米复合材料在水解后表现出较强的SWCNT-APTES和PBS基体之间的界面相互作用，导致较少的团聚。然而，PBS/SWCNT-APTES纳米复合材料制备的物理共混没有水解表现出严重的单壁碳纳米管在PBS中的再团聚。SWCNT-APTES的加入增强了PBS的结晶在纳米复合材料的水解和物理共混的方法，由于异相成核效应，而PBS的晶体结构保持。特别是，一个更显着的增加结晶速率的物理共混物相比，PBS/SWCNT-APTES水解后，由于更高的扩散常数，这是由于纳米管的表面性质的变化。此外，SWCNT-APTES的掺入改善了纳米复合材料的储能模量与纯PBS相比。水解后的PBS/SWCNT-APTES纳米复合材料比未水解的PBS/SWCNT-APTES纳米复合材料具有更高的拉伸强度。
Biodegradable poly(butylene succinate) (PBS)/single-walled carbon nanotube (SWCNT) nanocomposites were successfully prepared through silication and physical blend between PBS and acyl aminopropyltriethoxysilane functionalized single-walled carbon nanotube (SWCNT-APTES), which was obtained from acylate between 3-aminopropyltriethoxysilane and acyl chloride functionalized single-walled carbon nanotube. Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) observations revealed that the PBS chains were covalently attached to the SWCNT-APTES by hydrolysis. PBS/SWCNT-APTES nanocomposites after hydrolysis exhibited strong interfacial interaction between SWCNT-APTES and PBS matrix, leading to a less agglomeration. However, the PBS/SWCNT-APTES nanocomposite prepared by only physical blend without hydrolysis exhibited severe reagglomeration of SWCNT in the PBS. The addition of SWCNT-APTES enhanced the crystallization of the PBS in the nanocomposites for both approaches of hydrolysis and physical blend due to the heterogeneous nucleation effect while the crystal structure of PBS remained. Especially, a more significant increase of crystallization rate for physical blend was present as comparison to PBS/SWCNT-APTES after hydrolysis due to the higher diffusion constant, which is attributed to the change of surface properties of nanotubes. Furthermore, the incorporation of SWCNT-APTES improved the storage modulus of the nanocomposites compared with that of neat PBS. The PBS/SWCNT-APTES nanocomposites after hydrolysis showed of higher tensile strength than PBS/SWCNT-APTES nanocomposite without hydrolysis.