Polydopamine particles for next-generation multifunctional biocomposites
Polydopamine particles for next-generation multifunctional biocomposites
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用于下一代多功能生物复合材料的聚多巴胺颗粒
DOI：
10.1039/c4ta00235k
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发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Hu, Zuming
中科院分区：
文献类型：
--
作者：
Xiong, Shuqiang;Wang, Yan;Hu, Zuming
为了支持生物复合材料领域的快速发展，有必要开发生物相容性，多功能和易于获得的新型填料。在这项工作中，聚多巴胺颗粒（PDAPs）已被报道为用于构建聚合物复合材料的填料。首先通过多巴胺的氧化聚合制备平均直径约为1040和310 nm的PDAP，然后通过传统的溶液浇铸法制备PDAP/聚乙烯醇（PVA）复合材料。对所得复合材料的测量证实了PDAP和PVA链之间的强相互作用以及PDAP在整个基质中的良好分散。结果表明，PDAPs能促进PVA的结晶，从而大大提高复合材料的力学性能。热重分析结果表明，聚乙烯醇的起始分解温度和最高分解温度都显着提高PDAP的加入。此外，复合材料表现出上级的抗氧化性能和紫外线屏蔽效率相比，纯PVA。还评估了颗粒尺寸对增强的影响。结果表明，PDAPs是一个很好的候选人，用于多功能复合材料。
To support rapid advancements in the field of biocomposites, it is necessary to exploit novel fillers that are biocompatible, multifunctional and easy to obtain. In this work, polydopamine particles (PDAPs) have been reported as a filler for constructing polymer composites. PDAPs with average diameters of about 1040 and 310 nm were first prepared by a convenient oxidative polymerization of dopamine, then PDAP/poly(vinyl alcohol) (PVA) composites were prepared through a traditional solution-casting method. Measurements on the resultant composites confirmed strong interactions between the PDAPs and PVA chains and the good dispersion of PDAPs throughout the matrix. It was found that the PDAPs could promote the crystallization of PVA and, thus, greatly improve the mechanical properties of the composites. TGA results showed that both the initial and maximum decomposition temperatures of PVA were significantly increased by the addition of PDAPs. Moreover, the composites showed superior antioxidant properties and UV-shielding efficiency compared to neat PVA. The effect of particle size on the reinforcement was also evaluated. The results suggested that PDAPs could be a good candidate for use in multifunctional composites.