微晶纤维素
纤维素
粘度
自愈水凝胶
生物高聚物
化学工程
极限抗拉强度
材料科学
抗压强度
高分子化学
溶剂
复合材料
化学
聚合物
有机化学
工程类
作者
Deokyeong Choe,Young-Min Kim,Jae-Hwan Nam,Keonwook Nam,Chul Soo Shin,Young Hak Roh
标识
DOI:10.1016/j.carbpol.2017.10.017
摘要
Developing hydrogels with enhanced mechanical strength is desirable for bio-related applications. For such applications, cellulose is a notable biopolymer for hydrogel synthesis due to its inherent strength and stiffness. Here, we report the viscosity-adjusted synthesis of a high-strength hydrogel through the physical entanglement of microcrystalline cellulose (MCC) in a solvent mixture of tetrabutylammonium fluoride/dimethyl sulfoxide (TBAF/DMSO). MCC was strategically dissolved with TBAF in DMSO at a controlled ratio to induce the formation of a liquid crystalline phase (LCP), which was closely related to the viscosity of the cellulose solution. The highest viscosity was obtained at 2.5% MCC and 3.5% TBAF, leading to the strongest high-strength MCC hydrogel (strongest HS-MCC hydrogel). The resulting hydrogel exhibited a high compressive strength of 0.38MPa and a densely packed structure. Consequently, a positive linear correlation was determined between the viscosity of the cellulose solution and the mechanical strength of the HS-MCC hydrogel.
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