Thermal, rheological, and mechanical properties of cellulose nanofiber (CNF) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) biopolymer nanocomposites
Thermal, rheological, and mechanical properties of cellulose nanofiber (CNF) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) biopolymer nanocomposites
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DOI：
10.1007/s10570-022-04539-0
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发表时间：
2022-04-01
期刊：
影响因子：
5.7
通讯作者：
Ohshima, Masahiro
中科院分区：
文献类型：
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作者：
Lee, Jisuk;Hikima, Yuta;Ohshima, Masahiro
研究了聚(3-羟基丁酸酯-3-羟基己酸酯)/化学改性纤维素纳米纤维复合材料(PHBH/CNF)的流变性能和热性能。在注塑机上对PHBH/CNF复合材料的加工性能进行了测试。采用烯基琥珀酸酐(ASA)对CNF进行表面改性，以控制PHBH的粘度和结晶速率。快速扫描量热仪(FSC)分析表明，PHBH/CNF的结晶速度比纯PHBH快4倍。流变性测试表明，分散的ASA改性CNF在PHBH中形成了网络结构，使复合粘度和储能模数提高了约2~3个数量级。虽然PHBH本身容易受到热处理的影响，但PHBH/CNF复合材料可以改善流变性能和热性能，减小晶体尺寸，增强力学性能。因此，这些效应提高了注射成型过程中PHBH的加工性。
The rheological and thermal properties of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and chemically modified cellulose nanofiber nanocomposites (PHBH/CNF) were investigated. The processability of the PHBH/CNF composite was also tested using an injection molding machine. Surface modification of CNF was conducted with alkenyl succinic anhydride (ASA) to control the viscosity and the crystallization rate of PHBH. The fast-scanning calorimeter (FSC) analysis showed that the crystallization rate of PHBH/CNF became four times faster than that of pure PHBH. The rheological measurement indicated that the dispersed ASA-modified CNF formed a network structure in PHBH and increased complex viscosity and storage modulus by about two to three orders of magnitude. Although PHBH alone is vulnerable to heat treatment, PHBH/CNF composites can improve rheological and thermal properties, reduce crystal size and reinforce the mechanical property. As a result, these effects increased the processability of PHBH by the injection molding process.