Papers by Keyword: Cellulose Whisker

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Authors: Xin Yi Jin, Cai Wei He, Xin Ran Liu, Xue Jiao Yan, Qiao Zhen Yu
Abstract: Lignin is abundant in nature and it is good materials for carbon fiber, but the mechanical strength of the carbon fiber prepared by the lignin extracted from the paper mill waste is low. In this study, nanocellulose whisker (NCW) was used to reinforce lignin and the NCW/lignin composite fibrous film was prepared by electrospinning. By scanning electron microscopy (SEM), single fiber strength tester, the morphologies and mechanical properties of the composite films were researched; the influence of the mass fraction of NCWs on the mechanical property of lignin fibrous film was studied. In the range of this experiment, the results show that adding NCWs into lignin improved the spinnability of lignin, with the increase of the content of NCWs, the mechanical property of lignin fibrous film increased, but there is an optimum content of NCW and the NCWs must be dispersed evenly in the lignin. As the content of NCW increased from 0.3% to 5.0%, the tensile strength and modulus of NCW/lignin fibrous film increased, but the elongation at break decreased. The spinnability of lignin will be worsen if the contend of NCW was more than 5.0%.
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Authors: Lin Liu, Ju Ming Yao
Abstract: In this paper, the cellulose whisker/silk fibroin (CW/SF) aqueous solution with different composition was obtained by a dialysis against polyethylene glycol (PEG) solution at room temperature. The rheological behavior of CW/SF solution was investigated and the reinforced CW/SF hybrid fibres were prepared by a dry-wet spinning method. The results showed that the spinnability was better for the CW/SF solution according to the calculation of flowing characteristic index. The cellulose whiskers were dispersed homogeneously in the silk matrix. Moreover, it could be found that the tensile strength and Young’s modulus of the hybrid fibers were improved with the increase of cellulose whisker content, which reached the maximum when the cellulose whisker content was 5 wt%. Compared with the pure silk fiber, the tensile strength and Young’s modulus of the CW/SF hybrid fibers containing 5 wt% CWs were increased from 135.78±12.73 MPa and 5.74±0.43 GPa to 438.68±22.63 MPa and 17.36±2.04 GPa, respectively.
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