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Vol. 10 No. 3 (2018)

Layer-by-Layer Assembled Bacterial Cellulose/Graphene Oxide Hydrogels with Extremely Enhanced Mechanical Properties

https://doi.org/10.1007/s40820-018-0195-3
Honglin Luo
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, People’s Republic of China
Jiaojiao Dong
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, People’s Republic of China
Fanglian Yao
School of Chemical Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
Zhiwei Yang
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, People’s Republic of China
Wei Li
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, People’s Republic of China
Jie Wang
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, People’s Republic of China
Xinhua Xu
School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin University, Tianjin 300072, People’s Republic of China
Jian Hu
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, People’s Republic of China
Yizao Wan
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, People’s Republic of China

Corresponding Author: Yizao Wan

yzwan@tju.edu.cn

Nano-Micro Letters, Vol. 10 No. 3 (2018), Article Number: 42

Abstract

Uniform dispersion of two-dimensional (2D) graphene materials in polymer matrices remains challenging. In this work, a novel layer-by-layer assembly strategy was developed to prepare a sophisticated nanostructure with highly dispersed 2D graphene oxide in a three-dimensional matrix consisting of one-dimensional bacterial cellulose (BC) nanofibers. This method is a breakthrough, with respect to the conventional static culture method for BC that involves multiple in situ layer-by-layer assembly steps at the interface between previously grown BC and the culture medium. In the as-prepared BC/GO nanocomposites, the GO nanosheets are mechanically bundled and chemically bonded with BC nanofibers via hydrogen bonding, forming an intriguing nanostructure. The sophisticated nanostructure of the BC/GO leads to greatly enhanced mechanical properties compared to those of bare BC. This strategy is versatile, facile, scalable, and can be promising for the development of high-performance BC-based nanocomposite hydrogels.


Highlights:


1 A modified in situ static culture method (layer-by-layer assembly, LBLA) was developed.
2 The LBLA method ensures uniform distribution of graphene oxide (GO) in bacterial cellulose (BC) and makes very thick BC/GO hydrogels with homogeneous structures.
3 The BC/GO hydrogels show greatly enhanced mechanical properties over bare BC.

Keywords

Bacterial cellulose Nanocomposite Graphene oxide Biosynthesis Nanofiber Hydrogels
Luo, Honglin, Jiaojiao Dong, Fanglian Yao, Zhiwei Yang, Wei Li, Jie Wang, Xinhua Xu, Jian Hu, and Yizao Wan. 2018. “Layer-by-Layer Assembled Bacterial Cellulose/Graphene Oxide Hydrogels With Extremely Enhanced Mechanical Properties”. Nano-Micro Letters 10 (3):42. https://doi.org/10.1007/s40820-018-0195-3.
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