Cellulose nanocrystal/plant oil polymer composites with hydrophobicity, humidity-sensitivity, and high wet strength.
Cellulose nanocrystal/plant oil polymer composites with hydrophobicity, humidity-sensitivity, and high wet strength.
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DOI：
10.1016/j.carbpol.2019.115739
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发表时间：
2020-03
影响因子：
11.2
通讯作者：
Baoxia Wang;Jiangjun Zhou;Zixuan Wang;Shiling Mu;Rong Wu;Zhongkai Wang
中科院分区：
文献类型：
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作者：
Baoxia Wang;Jiangjun Zhou;Zixuan Wang;Shiling Mu;Rong Wu;Zhongkai Wang
高性能纤维素纳米晶体(CNCs)/植物油衍生聚合物复合材料的制备仍然是一个挑战，由于其相容性差。本研究通过在葵花籽油衍生聚合物上设计酰胺基和环氧基，构建了聚合物与cnc之间的界面氢键相互作用，使cnc均匀分散在聚合物基体中。拉伸试验和DMA结果表明，在葵花籽油衍生的环氧聚合物中加入cnc可显著提高其拉伸强度和存储模量。更重要的是，含有50 wt% cnc的纳米复合材料仍然是疏水的，不仅表现出快速可逆的湿诱导模量开关，而且在平衡吸附后还表现出较高的湿强度（19.9 MPa）。研究表明，适当设计的cnc /植物油聚合物纳米复合材料是高性能和功能材料的良好候选材料，可以在各个领域取代石油基材料。
The preparation of high-performance cellulose nanocrystals (CNCs)/plant oil-derived polymer composites is still a challenge, due to their poor compatibility. Here, by designing amide groups and epoxy groups on sunflower oil derived polymers, appropriate interfacial hydrogen bond interactions between the polymers and CNCs were constructed, where CNCs were homogenously dispersed in polymer matrix. Tensile tests and DMA results revealed that the incorporation of CNCs into sunflower oil derived epoxy polymers significantly enhanced the tensile strength and storage modulus. More importantly, nanocomposites with 50 wt% CNCs are still hydrophobic, which not only show a fast and reversible humidity induced modulus switch, but also exhibit high wet strength (19.9 MPa) after equilibrium water adsorption. The present work revealed that proper designed CNCs/plant oil polymer nanocomposites are good candidates for high performance and functional materials, which are able to replace petroleum-based materials in various fields.