College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China.
College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China.
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。
