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首页> 外文期刊>Journal of Applied Polymer Science >Nanosilica filled poly(glycerol-sebacate-citrate) elastomers with improved mechanical properties, adjustable degradability, and better biocompatibility
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Nanosilica filled poly(glycerol-sebacate-citrate) elastomers with improved mechanical properties, adjustable degradability, and better biocompatibility

机译：纳米二氧化硅填充的聚（癸二酸癸二酸甘油酯）弹性体，具有改善的机械性能，可调节的降解性和更好的生物相容性

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摘要

Modified nano-fumed silica (mn-silica)/poly(glycerol-sebacate-citrate), in which mn-silica loadings varied from 0 to 20 phr, were prepared by in situ polymerization and surface modification. The influence of mn-silica loadings on the structure and properties of the composites was studied. Scanning electron microscope (SEM) and transmission electron microscope (TEM) photos showed that the mn-silica dispersed well as nano-scale network in the matrix, and exhibited good interfacial bonding with the matrix. The mn-silica filled composites exhibited excellent comprehensive properties relative to the unfilled elastomers. Specially, the tensile strength improved from 0.9 MPa to 5.3 MPa. Results of the in vitro degradation test suggested that mn-silica loading could adjust the degradation rate of the composites in simulated body fluid solution. The MTT colorimetry with L929 cells substantiated that the introduction of mn-silica weakened the cytotoxicity of elastomers and made the composites accepted as qualified biomedical materials.
机译：通过原位聚合和表面改性制备了改性的纳米气相法二氧化硅（mn-silica）/聚（癸二酸癸二酸甘油酯），其中mn-二氧化硅的负载量为0至20 phr。研究了硅锰含量对复合材料结构和性能的影响。扫描电子显微镜（SEM）和透射电子显微镜（TEM）照片显示，锰硅在纳米基质中分散良好，并具有纳米级的网络，并且与基质之间表现出良好的界面键合。相对于未填充的弹性体，锰-二氧化硅填充的复合材料表现出优异的综合性能。特别地，拉伸强度从0.9MPa提高到5.3MPa。体外降解试验的结果表明，在模拟体液溶液中，纳米二氧化硅的负载量可以调节复合材料的降解速率。用L929细胞进行的MTT比色法证实，锰硅的引入减弱了弹性体的细胞毒性，并使复合材料成为合格的生物医学材料。

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