title: Cross-linkage effect of cellulose/laponite hybrids in aqueous dispersions and solid films.
abstract: Homogenous cellulose/laponite aqueous dispersions and composite films were respectively prepared from the pre-cooling NaOH/urea aqueous systems. Rheological measurements of aqueous dispersions demonstrated a sol-to-gel transition triggered by loading of laponite, reflecting a cross-linkage effect of cellulose/laponite hybrids. Similarly, based on scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) characterizations, as well as mechanical and thermal measurements, the cross-linkage effect of cellulose/laponite hybrids was also found in solid films, which played an important role in improving the tensile strength (σb) of composite films. For instance, the σb exhibited a largest enhancement up to 75.7% at a critical laponite content of 0.100 wt%, indicating that the property of composite film was closely related with the dispersion and interaction state of laponite, i.e. its content in cellulose matrix. These results were expected to provide significant information for fabrication and utility of cellulose-based materials.
authors: Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, China; Key Laboratory of Pulp and Paper Science and Technology, Ministry of Education, Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Zaiwu
authors: Z
authors: Yuan
authors: Key Laboratory of Pulp and Paper Science and Technology, Ministry of Education, Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Qingrui
authors: Q
authors: Fan
authors: Key Laboratory of Pulp and Paper Science and Technology, Ministry of Education, Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Xiaonan
authors: X
authors: Dai
authors: Key Laboratory of Pulp and Paper Science and Technology, Ministry of Education, Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Chao
authors: C
authors: Zhao
authors: Key Laboratory of Pulp and Paper Science and Technology, Ministry of Education, Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Aijie
authors: A
authors: Lv
authors: Key Laboratory of Pulp and Paper Science and Technology, Ministry of Education, Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Jingjing
authors: J
authors: Zhang
authors: Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, China. Electronic address: xuguiying@sdu.edu.cn.
authors: Guiying
authors: G
authors: Xu
authors: Key Laboratory of Pulp and Paper Science and Technology, Ministry of Education, Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China; Laboratory of Organic Chemistry, Taishan University, Taian 271021, China. Electronic address: qmh@spu.edu.cn.
authors: Menghua
authors: M
authors: Qin
keywords: Cellulose aqueous solutions; Composite film; Cross-linkage; Laponite; Reinforcement