Effects of modified nanocrystalline cellulose on the hydrophilicity, crystallization and mechanical behaviors of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)
Effects of modified nanocrystalline cellulose on the hydrophilicity, crystallization and mechanical behaviors of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)
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改性纳米晶纤维素对聚(3-羟基丁酸酯-co-3-羟基己酸酯)亲水性、结晶性和力学行为的影响
DOI：
10.1039/c8nj02012d
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发表时间：
2018-07
影响因子：
3.3
通讯作者：
Piming Ma
中科院分区：
文献类型：
--
作者：
Pengwu Xu;Ying Cao;Baogou Wu;Piming Ma;Weifu Dong;Huiyu Bai;Hongji Zhang;Han Zhu;Mingqing Chen;Piming Ma
纳米晶纤维素（NCC）在细菌合成的聚（3-羟基丁酸酯-co-3-羟基己酸酯）（PHBH）基质中的精细分散由于它们的不相容性而具有挑战性。为了提高它们的相容性，首先使用(3-氨基丙基)三乙氧基硅烷(APES)作为偶联剂，将NCC接枝到PHBH，标记为NCC-g-PHBH，接枝度达到~25 wt%。对通过溶液浇铸制备的 PHBH/NCC-g-PHBH 共混物的接枝机理以及机械和结晶行为进行了系统研究。接枝PHBH后NCC均匀分散在PHBH基质中。因此，在 NCC-g-PHBH 的存在下，PHBH 的机械和结晶性能得到了极大的改善。添加 1.0 wt% NCC-g-PHBH 后，PHBH/NCC-g-PHBH 共混物的杨氏模量增加了 15%（通过 Halpin-Tsai 模型进一步评估），同时表面接触角降低了 30°。此外，NCC-g-PHBH 共聚物的存在大大增加了 PHBH 的核密度并降低了球晶尺寸，而没有改变晶体结构。因此，这项工作为制备完全可生物降解的生物基PHBH纳米复合材料提供了一条新途径，有望拓宽PHBH的应用范围。
Fine dispersion of nanocrystalline cellulose (NCC) in a bacterially synthesized poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) matrix is challenging due to their incompatibility. To improve their compatibility, NCC was first grafted with PHBH, marked as NCC-g-PHBH, using (3-aminopropyl)triethoxysilane (APES) as a coupling agent, leading to a grafting degree of ∼25 wt%. The grafting mechanism and the mechanical and crystallization behaviors of the PHBH/NCC-g-PHBH blends, prepared via solution casting, were systematically investigated. The NCC was uniformly dispersed in the PHBH matrix after grafting with PHBH. As a consequence, the mechanical and crystallization properties of the PHBH were greatly improved in the presence of the NCC-g-PHBH. With the addition of 1.0 wt% NCC-g-PHBH, the Young's modulus of the PHBH/NCC-g-PHBH blend was increased by 15%, which is further evaluated by the Halpin–Tsai model, while the surface contact angles decreased by 30°. Furthermore, the presence of NCC-g-PHBH copolymers greatly increased the nuclei density and decreased the spherulite size of PHBH without changing the crystal structures. Therefore, this work provided a novel route to prepare fully biodegradable and bio-based PHBH nanocomposites, which may broaden the application range of PHBH.
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影响因子：
9.1
作者：
Jonoobi, Mehdi;Harun, Jalaluddin;Oksman, Kristiina
通讯作者：
Oksman, Kristiina
影响因子：
11.2
作者：
Song-bai Lin;Jin Huang;P. Chang;Siwen Wei;Yixiang Xu;Qiao-xin Zhang
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影响因子：
9.5
作者：
Xu, Xuezhu;Liu, Fei;Wiesenborn, Dennis P.
通讯作者：
Wiesenborn, Dennis P.
影响因子：
3.1
作者：
Fenghua Su;Hanxiong Huang
通讯作者：
Fenghua Su;Hanxiong Huang
影响因子：
11.2
作者：
Zhijiang Cai;C. Hou;Guang Yang
通讯作者：
Zhijiang Cai;C. Hou;Guang Yang