Effects of modified nanocrystalline cellulose on the hydrophilicity, crystallization and mechanical behaviors of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)†,New Journal of Chemistry

当前位置： X-MOL 学术 › New J. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Effects of modified nanocrystalline cellulose on the hydrophilicity, crystallization and mechanical behaviors of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)†
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2018-06-07 00:00:00 , DOI: 10.1039/c8nj02012d
Pengwu Xu _{1,

2,

3,

4,

5} , Ying Cao _{1,

2,

3,

4,

5} , Baogou Wu _{1,

2,

3,

4,

5} , Piming Ma _{1,

2,

3,

4,

5} , Weifu Dong _{1,

2,

3,

4,

5} , Huiyu Bai _{1,

2,

3,

4,

5} , Hongji Zhang _{1,

2,

3,

4,

5} , Han Zhu _{1,

2,

3,

4,

5} , Mingqing Chen _{1,

2,

3,

4,

5}

Affiliation

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.

中文翻译：

上的亲水性，结晶改性纳米晶体纤维素的效果和聚（3-羟基丁酸酯的力学行为共-3-羟基己酸酯）†

在细菌合成的多纳米晶体纤维素（NCC）的精细分散体（3-羟基丁酸酯共-3-羟基己酸酯）（PHBH）矩阵是具有挑战性的，因为它们不兼容。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与PHBH接枝，标记为NCC- g -PHBH，接枝度约为25 wt％。通过以下方法制备的PHBH / NCC- g -PHBH共混物的接枝机理以及机械和结晶行为溶液浇铸，进行了系统的研究。用PHBH接枝后，NCC均匀分散在PHBH基质中。结果，在存在NCC- g -PHBH的情况下，PHBH的机械性能和结晶性能得到了极大的改善。通过添加1.0 wt％的NCC- g -PHBH，PHBH / NCC- g -PHBH共混物的杨氏模量增加了15％，这由Halpin-Tsai模型进一步评估，而表面接触角减小了30°。此外，NCC- g的存在-PHBH共聚物在不改变晶体结构的情况下极大地增加了PHBH的核密度并减小了球晶尺寸。因此，这项工作为制备完全可生物降解的基于生物的PHBH纳米复合材料提供了一条新颖的途径，这可能会拓宽PHBH的应用范围。

更新日期：2018-06-07

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11