Graphene oxide induced crystallization and hydrolytic degradation of poly(butylene succinate)
Graphene oxide induced crystallization and hydrolytic degradation of poly(butylene succinate)
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氧化石墨烯诱导聚丁二酸丁二醇酯的结晶和水解降解
DOI：
10.1016/j.polymdegradstab.2015.11.011
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发表时间：
2016-01-01
影响因子：
5.9
通讯作者：
Gao, Xiao-ling
中科院分区：
文献类型：
--
作者：
Du, Xue-chong;Xu, Xian-ling;Gao, Xiao-ling
将不同含量的氧化石墨烯（GO）引入聚丁二酸丁二醇酯（PBS）中，研究GO对PBS基体结晶行为的影响以及PBS/GO复合材料的水解降解行为。利用偏光显微镜（POM）、差示扫描量热仪（DSC）和广角X射线衍射仪（WAXD）研究了复合材料中PBS的初始结晶结构。结果表明，GO对PBS基体的结晶具有成核作用。然而，高含量的GO也限制了微晶的生长，导致PBS结晶度降低，晶粒尺寸减小。通过测量水在样品表面上的接触角来评价样品的亲水性。结果表明，GO的存在大大增强了样品的亲水性。在37 ℃的碱性溶液中研究了样品的水解降解行为。结果表明，GO的加入大大提高了PBS的水解降解能力。复合材料中GO含量越多，其水解降解能力越强。复合材料表面亲水性的增加，提高了样品表面对水的润湿性，PBS基体结晶度的降低，以及复合材料中缺陷的存在，都是导致复合材料表面亲水性增强的主要原因。G.在PBS基质和GO颗粒之间的界面处，主要有助于大大增强PBS的水解降解能力。分析了水解降解过程中的微观结构变化。本工作为加速PBS的水解降解提供了一种新的途径。(C)2015爱思唯尔有限公司版权所有。
In this Work, different contents of graphene oxide (GO) were introduced into poly(butylene succinate) (PBS) to study the effects of GO on crystallization of PBS matrix and the resultant hydrolytic degradation behaviors of the PBS/GO composites. The initial crystalline structures of PBS in the composites were investigated using a polarized optical microscope (POM), differential scanning calorimetry (DSC) and a wide angle X-ray diffraction (WAXD). The results demonstrated that GO showed nucleation effect for the crystallization of PBS matrix. However, high content of GO also restricted the growth of crystallite, resulting in the decrease of PBS crystallinity and the reduction of crystal size. The hydrophilicity of sample was evaluated by measuring the contact angle of water on the sample surface. The results demonstrated that the presence of GO greatly enhanced the hydrophilicity of the sample. The hydrolytic degradation behavior of sample in alkaline solution was investigated at 37 degrees C. The results showed that the hydrolytic degradation ability of PBS was greatly enhanced by adding GO. The more the GO in the composites, the higher the hydrolytic degradation ability was. The increased hydrophilicity that enhanced the wettability of sample surface by water, the decreased crystallinity of PBS matrix, and the presence of the defects in the composite, e. g. at the interface between the PBS matrix and GO particles, mainly contributed to the largely enhanced hydrolytic degradation ability of PBS. The microstructure changes during the hydrolytic degradation process were also analyzed. This work provided an alternative way to accelerate the hydrolytic degradation of PBS. (C) 2015 Elsevier Ltd. All rights reserved.