采用熔融共混法制备增强 PHBV 复合材料的结晶性能和力学性能：CNCs 和 CNFs 的影响。
Crystallization and mechanical properties of reinforced PHBV composites using melt compounding: Effect of CNCs and CNFs.
机构信息
College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China.
College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China.
出版信息
Carbohydr Polym. 2017 Jul 15;168:255-262. doi: 10.1016/j.carbpol.2017.03.076. Epub 2017 Mar 24.
Nanocellulose reinforced poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) composites were prepared using melt compounding. The effects of nanocellulose types (CNCs and CNFs) and nanocellulose content (1, 2, 3, 4, 5, 6 and 7wt%) on the crystallization, thermal and mechanical properties of PHBV composites were systematically compared in this study. The thermal stability of PHBV composites was improved by both CNCs and CNFs. CNFs with a higher thermal stability leaded to a higher thermal stability of PHBV composites. Both CNCs and CNFs induced a reduction in the crystalline size of PHBV spherulites. Furthermore, CNCs could act as a better nucleating agent for PHBV than did CNFs. CNCs and CNFs showed reinforcing effects in PHBV composites. At the equivalent content of nanocellulose, CNCs led to a higher tensile modulus of PHBV composites than did CNFs. 1wt% CNCs/PHBV composites exhibited the most optimum mechanical properties.
采用熔融共混法制备了纳米纤维素增强的聚（3-羟基丁酸-co-3-羟基戊酸酯）（PHBV）复合材料。本研究系统比较了纳米纤维素种类（CNC 和 CNF）和纳米纤维素含量（1wt%、2wt%、3wt%、4wt%、5wt%、6wt%和 7wt%）对 PHBV 复合材料结晶、热性能和力学性能的影响。CNC 和 CNF 均提高了 PHBV 复合材料的热稳定性。具有更高热稳定性的 CNF 导致 PHBV 复合材料具有更高的热稳定性。CNC 和 CNF 均减小了 PHBV 球晶的结晶尺寸。此外，CNC 比 CNF 更能作为 PHBV 的成核剂。CNC 和 CNF 在 PHBV 复合材料中表现出增强作用。在纳米纤维素含量相等的情况下，CNC 使 PHBV 复合材料的拉伸模量高于 CNF。1wt% CNC/PHBV 复合材料表现出最佳的力学性能。
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