Koki Akiyama, Tomonori Koda, Akihiro Nishioka, Yoshimasa Matsumura, Bungo Ochiai
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引用次数: 0
摘要
醋酸纤维素（CA）是在对环境无害的条件下，通过冷剪切短时间内对低结晶纤维素（LCCell）进行固液乙酰化合成的，它能有效提高聚乳酸（PLA）的结晶度。与原始聚乳酸相比，用 LCCell 中的 CA 与聚乳酸复合而成的复合材料具有更高的聚乳酸结晶度和弯曲模量。从结晶纤维素和重结晶纤维素中获得的 CA 也能通过复合提高聚乳酸的机械强度，但其效果弱于从 LCCell 中获得的 CA。从 LCCell 中提取的 CA 效果显著的原因是，通过冷剪切，纤维素纤维中的链间氢键被充分释放，使复合材料中的 CA 链宏观聚集溶解，从而与聚乳酸具有更高的相溶性。
Cellulose acetate synthesized from cold-sheared cellulose shows improved ability to toughen poly(lactic acid)
Cellulose acetate (CA), synthesized by solid–liquid acetylation of low crystalline cellulose (LCCell) obtained by cold shearing in a short time under environmentally benign conditions, effectively enhanced the crystallization of poly(lactic acid) (PLA). The composite of PLA compounded with CA from LCCell exhibited higher crystallinity of PLA and flexural modulus than those from pristine PLA. CAs obtained from crystalline and recrystallized cellulose also improved the mechanical strength of PLA by compounding, but their effects were weaker than that of CA from LCCell. The factor of the effectiveness of CA obtained from LCCell is the higher miscibility with PLA originating from the sufficiently released interchain hydrogen bonds in the cellulose fibrils by cold shearing, which allows the dissolution of macroscopic aggregation of the CA chains in the composite.
期刊介绍：
Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology.
As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology.
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