Structure and mechanical properties of new biomass-based nanocomposite: castor oil-based polyurethane reinforced with acetylated cellulose nanocrystal.
Structure and mechanical properties of new biomass-based nanocomposite: castor oil-based polyurethane reinforced with acetylated cellulose nanocrystal.
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DOI：
10.1016/j.carbpol.2013.02.023
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发表时间：
2013-06
影响因子：
11.2
通讯作者：
Song-bai Lin;Jin Huang;P. Chang;Siwen Wei;Yixiang Xu;Qiao-xin Zhang
中科院分区：
文献类型：
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作者：
Song-bai Lin;Jin Huang;P. Chang;Siwen Wei;Yixiang Xu;Qiao-xin Zhang
以蓖麻油基聚氨酯为基体，填充乙酰化纤维素纳米晶体（ACNs），研制了新型纳米复合材料。与未改性的纤维素纳米晶体相比，ACN在四氢呋喃中表现出更好的分散性，并且极性降低，从而使纳米复合材料的负载水平高达25wt%。随着ACN加载水平从0%增加到25%，纳米复合材料的抗拉强度和杨氏模量分别从2.79MPa和0.98MPa增加到10.41MPa和42.61MPa。当ACN负荷水平为10wt%时，纳米复合材料的断裂伸长率达到最大值，是聚氨酯的2倍以上。增强的力学性能主要归因于三维ACN网络的形成和填料与基体之间强的界面相互作用。这项工作产生了新的聚氨酯基纳米复合材料，其中含有高生物量含量的改性纤维素纳米晶体。它的高性能可能有助于潜在的应用。
New nanocomposites consisting of a castor oil-based polyurethane matrix filled with acetylated cellulose nanocrystals (ACNs) were developed. The ACN exhibited improved dispersion in tetrahydrofuran as a blending medium, and reduced polarity as compared with unmodified cellulose nanocrystals, resulting in a high loading level of 25wt% in the nanocomposite. As the ACN loading-level increased from 0% to 25%, the tensile strength and Young's modulus of the nanocomposites increased from 2.79MPa to 10.41MPa and from 0.98MPa to 42.61MPa, respectively. When the ACN loading-level was 10wt%, the breaking elongation of the nanocomposites reached the maximum value of more than twice that of the polyurethane. The enhanced mechanical performance was primarily attributed to the formation of a three-dimensional ACN network and strong interfacial interactions between filler and matrix. This work produced new polyurethane-based nanocomposites containing modified cellulose nanocrystal with a high biomass content. Its high performance could contribute to potential applications.