木质素/PVA复合膜的性能

Performance of lignin/PVA composite film

以可再生资源木质素磺酸钙和聚乙烯醇(PVA)为基料,制备力学强度及耐水性能良好的木质素/PVA复合膜。采用5因素二次正交旋转组合设计研究了木质素磺酸钙、PVA、甲醛、尿素、硼砂对膜拉伸强度、断裂伸长率和吸水率的影响,并得到相应二次回归模型。分析表明:5个因素的一次项、二次项及交互项对膜拉伸强度、断裂伸长率和吸水率均有不同程度的影响。当原料配比为木质素磺酸钙7 g、PVA 14 g、甲醛10 g、尿素7 g、硼砂2.5 g时,可以得到拉伸性能和耐水性优良的木质素/PVA复合膜。

With calcium lignosulfonate and PVA as the primary materials, the composite film of good mechanical properties and low water absorption was prepared. By adopting 5 factors quadratic orthogonal and rotational combination design, the effects of calcium lignosulfonate, PVA, formaldehyde, urea and borax on tensile strength, elongation at break and water-absorption rate were studied and relevant quadratic regression models were developed. The model analyses showed that all single, quadratic and mutual terms of the five factors affect the composite film properties to some extent. The results showed that the optimal condition for the composite film with good performance are follows： calcium lignosulfonate content 7 g, PVA content 14 g, formaldehyde content 10 g, urea content 7 g, borax content 2.5 g.