Synthetic Celluloses as Green Fillers for the Enhancement of the Crystallization and Mechanical Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
Synthetic Celluloses as Green Fillers for the Enhancement of the Crystallization and Mechanical Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
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DOI：
10.1021/acssuschemeng.2c00835
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
Chen Fang;Yong Wang;Yushuang Miao;Taoran Shao;Guangmei Xia;Weijun Miao;Zongbao Wang
中科院分区：
文献类型：
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作者：
Chen Fang;Yong Wang;Yushuang Miao;Taoran Shao;Guangmei Xia;Weijun Miao;Zongbao Wang
酶法合成纤维素是一种新型的绿色填料，兼具可降解性和环境友好性的优点。在这项工作中，聚（3-羟基丁酸酯-co-3-羟基戊酸酯）[P（HB-co-HV）]纳米复合材料的制备使用熔融共混技术通过添加板条纤维素（SC）或盘状纤维素（DC）。研究并分析了纤维素的不同形态和重量含量对P（HB-co-HV）纳米复合材料结晶行为、形态和相互作用的影响。与纯P（HB-co-HV）相比，P（HB-co-HV）/0.1 wt %SC纳米复合材料的屈服强度和断裂伸长率分别提高了29%和79%，而P（HB-co-HV）/0.5 wt %DC纳米复合材料的屈服强度和断裂伸长率分别提高了34%和59%。差示扫描量热法和偏光显微镜的结果表明，纤维素的P（HB-co-HV）的结晶温度和降低球晶尺寸。广角X-射线衍射结果表明，纤维素影响了颗粒和晶面的生长。傅立叶变换红外光谱结果表明，P（HB-co-HV）与纤维素之间形成了较强的氢键。扫描电子显微镜图像显示纤维素在聚合物基质中均匀分散。该研究为制备绿色纳米填料和在少量填料存在下生产具有优异机械性能的生物可降解聚合物用于组织工程带来了相当大的优势。
Enzymatically synthetic cellulose is a novel green filler combining the advantage of degradability and environmental friendliness. In this work, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] nanocomposites were fabricated using the melt blending technique through the addition of slatted cellulose (SC) or disc-shaped cellulose (DC). The effects of different morphologies and weight contents of cellulose on the crystallization behavior, morphology, and interaction of P(HB-co-HV) nanocomposites were investigated and analyzed. Compared with neat P(HB-co-HV), the yield strength and elongation at break of P(HB-co-HV)/0.1 wt %-SC nanocomposites were increased by 29 and 79%, respectively, while those for P(HB-co-HV)/0.5 wt %-DC nanocomposites were increased by 34 and 59%, respectively. Differential scanning calorimetry and polarized optical microscopy results demonstrated that cellulose increased the crystallization temperature and decreased the spherulite size of P(HB-co-HV). Wide-angle X-ray diffraction results illustrated that the growth of the grain and crystal plane was affected by cellulose. Fourier transform infrared spectroscopy results indicated that strong hydrogen bonds were formed at the interface between P(HB-co-HV) and cellulose. Scanning electron microscopy images revealed the uniform dispersion of cellulose in the polymer matrix. This study entails considerable advantages for the preparation of green nanofillers and the production of biodegradable polymers with excellent mechanical properties for tissue engineering in the presence of small amounts of fillers.