可用于建筑材料领域的低密度聚乙烯-木质素复合材料的制备及应用

Preparation and Application of Low-density Polyethylene-Lignin Composites for Construction Materials

木质素是自然界中广泛存在的天然高分子材料,将木质素与低密度聚乙烯材料共混制备新型复合材料是高效利用这种工艺副产品的研究热点之一。通过马来酸酐界面改性,木质素与低密度聚乙烯材料,制备了具有良好界面相容性的复合材料。在此前提下,研究了木质素掺杂含量对制备的复合材料整体的力学性能、保温特性、热性能以及抗腐蚀能力的影响,评估获得该复合材料最佳木质素掺杂量。结果显示:当掺杂含量为20%时,制备的复合材料表现出最佳的综合性能,同时,其强度特征、热学特性、保温特性以及耐腐蚀能力均满足建筑材料使用标准。获得的低密度聚乙烯-木质素复合体系可用于传统的建筑领域。

Lignin is natural polymers widely found in nature,and the preparation of new composite materials by blending lignin with low-density polyethylene materials is one of the research hot spots for the efficient utilization of this process by-product.Composites with good interfacial compatibility were prepared by blending lignin with low-density polyethylene materials in combination with maleic anhydride.To evaluate the optimal lignin doping amount,the effect of lignin doping content on the mechanical properties,thermal properties,thermal insulation properties and corrosion resistance of the prepared composites was investigated.The results demonstrate that the composites have the best overall performance when the doping content is 20%,and the mechanical properties,thermal properties,thermal insulation properties and corrosion resistance meet the standards for the use of construction materials.Also,the prepared low-density polyethylene-lignin composites can be effectively used in construction materials.