Enhanced crystallization kinetics of bacterially synthesized poly(3-hydroxybutyrate-co-3-hydroxyhexanate) with structural optimization of oxalamide compounds as nucleators
Enhanced crystallization kinetics of bacterially synthesized poly(3-hydroxybutyrate-co-3-hydroxyhexanate) with structural optimization of oxalamide compounds as nucleators
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以草酰胺化合物作为成核剂进行结构优化，增强细菌合成聚（3-羟基丁酸酯-co-3-羟基己酸酯）的结晶动力学
DOI：
10.1016/j.polymdegradstab.2018.06.001
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发表时间：
2018-08
影响因子：
5.9
通讯作者：
Mingqing Chen
中科院分区：
文献类型：
--
作者：
Pengwu Xu;Ying Cao;Pei Lv;Piming Ma;Weifu Dong;Huiyu Bai;Wei Wang;Mingliang Du;Mingqing Chen;Piming Ma;Mingqing Chen
细菌合成聚（3-羟基丁酸酯-co-3-羟基己酸酯）作为一种生物降解塑料和潜在的生物材料受到了广泛的关注。然而，PHBH的结晶速率很低，限制了其在塑料领域的应用。本文设计了分子式为C6H5NHCOCONH(CH2)nNHCOCONHC6H5（n = 2,4,8,12）的草酰胺类化合物（OXAn）作为成核剂，以改善PHBH的结晶行为。研究了OXAn -(CH2)n-的脂肪族间隔长度对其成核行为的影响。oxan会组装成类似鱼的上层结构，PHBH晶体更倾向于生长在鱼的表面。PHBH/ oxan共混物的结晶速率随着oxan间隔长度的增大而增大，达到n = 8后趋于平稳，这与OXAn的成核活性（Ψ）和成核常数（Kg）一致。同时，氧增加了PHBH的核密度，抑制了PHBH的二次结晶，使得PHBH材料具有优越而稳定的力学性能。本研究为PHBH材料OXAnas成核剂的优化结构设计提供了科学的思路，拓宽了PHBH材料的应用范围。
Bacterially synthesized poly (3-hydroxybutyrate-co-3-hydroxyhexanate) (PHBH) has attracted much attention as biodegradable plastics and potential biomaterials. However, the crystallization rate of PHBH is very low, which limits its application in plastic field. Herein, oxalamide compounds (OXAn) with a formula of C6H5NHCOCONH(CH2)nNHCOCONHC6H5(n = 2, 4, 8, 12) were tailor-made as nucleators to improve the crystallization behaviors of PHBH. The effect of aliphatic spacer length of OXAn, i.e., -(CH2)n-on the nucleation behavior was investigated. The OXAnwould assemble into shish-like superstructures and PHBH crystals preferred to grow on the surfaces of the shish. The crystallization rate of PHBH/OXAnblends increased with the spacer length of OXAnup to n = 8 and then leveled off, which trend was consistent with the nucleation activity (Ψ) and the nucleation constant (Kg) of the OXAn. Meanwhile, the OXAnincreased the nuclei density of the PHBH while inhibited its secondary crystallization, resulting in a superior and steady mechanical performance of PHBH materials. This work provides a scientific approach to design the optimal structure of OXAnas nucleators for PHBH materials, which may broaden the application range of PHBH materials.
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影响因子：
3.9
作者：
L. Sharma;Y. Ogino;T. Kanaya
通讯作者：
L. Sharma;Y. Ogino;T. Kanaya
DOI：
10.1002/polb.20846
发表时间：
2006-07
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
H. Alata;Bayar Hexig;Y. Inoue
通讯作者：
H. Alata;Bayar Hexig;Y. Inoue
DOI：
10.1002/(sici)1099-0488(19971130)35:16
发表时间：
1997-11
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
A. Mamat;T. Vu-khanh;P. Cigana;B. Favis
通讯作者：
A. Mamat;T. Vu-khanh;P. Cigana;B. Favis
影响因子：
4.6
作者：
R. E. Withey;J. N. Hay
通讯作者：
R. E. Withey;J. N. Hay
影响因子：
4.6
作者：
YOKOUCHI, M;CHATANI, Y;TANI, H
通讯作者：
TANI, H