疏水型纸浆纤维基隔热泡沫材料的制备及性能研究  

Preparation and Properties of Hydrophobic Pulp Fiber-Based Insulating Foam Materials

作　　者：张自聪 郝发义[1] 刘伟丽 余文龙 ZHANG Zicong;HAO Fayi;LIU Weii;YU Wenong(College of Publishing,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学出版学院,上海200093

出　　处：《包装工程》2024年第21期125-132,共8页Packaging Engineering

摘　　要：目的开发具有疏水性、可回弹的生物降解型纸浆纤维基隔热泡沫。方法以纸浆纤维为主要原料,十二烷基硫酸钠为发泡剂,聚乙烯醇为交联剂,阳离子型聚丙烯酰胺为黏结剂,经过打浆、搅拌发泡、滤水和干燥,制备纸浆纤维基泡沫材料。在此基础上,通过涂布聚乳酸/二氧化硅进行疏水改性,降低纸浆纤维基泡沫的吸湿性。结果性能测试表明,所得纸浆泡沫具有超低密度(0.0443~0.0698 g/cm^(3))、高孔隙率(95.22%~97.04%)、低热导率(0.0711~0.0811W/(m·K))、优异的回弹性(1次压缩回弹率可达91.65%,10次压缩回弹率为87.77%)。聚乳酸/二氧化硅涂层显著提高了纸浆纤维基泡沫的隔热性能、疏水性(接触角为132.3°)。结论疏水型纸浆纤维基泡沫可代替传统泡沫用于冷链包装,支持包装行业的可持续发展。The work aims to develop a hydrophobic,resilient,and biodegradable pulp fiber-based insulating foam.With pulp fibers as the main raw material,sodium dodecyl sulfate as the foaming agent,polyvinyl alcohol as the cross-linking agent,and cationic polyacrylamide as the binder,the pulp fiber-based foam materials were prepared through a process involving pulping,mixing and foaming,drainage,and drying.To reduce the hygroscopicity of the pulp fiber-based foam,a hydrophobic modification was performed by coating with a polylactic acid/silica layer.The performance tests showed that the pulp fiber-based foam had ultra-low density(0.0443-0.0698 g/cm^(3)),high porosity(95.22%-97.04%),low thermal conductivity(0.0711-0.0811 W/(m·K)),excellent resilience(resilience up to 91.65%after once compression,87.77%after ten times of compression).The polylactic acid/silica coating significantly improved the thermal insulation,and hydrophobicity(contact angle 132.3°)of the pulp fiber-based foam.Hydrophobic pulp fiber-based foams can be used in cold chain packaging instead of traditional foams,supporting the sustainable development of the packaging industry.

关 键 词：纸浆纤维 泡沫材料 疏水 隔热 

分 类 号：TB34[一般工业技术—材料科学与工程]