废纸板纤维/淀粉发泡复合材料加工流变特性及泡孔形态  

Processing rheological property and cell morphology of waste paper pulp/starch foam composites

作　　者：曾广胜[1,2] 林瑞珍[1,2] 郑良杰[1,3] 

机构地区：[1]湖南工业大学包装新材料与技术中国包装总公司重点实验室,株洲412008 [2]湖南工业大学先进包装材料与技术湖南省普通高校重点实验室,株洲412008 [3]广西大学有色金属及材料加工新技术国家重点实验室,南宁530000

出　　处：《复合材料学报》2013年第5期107-112,共6页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(61174100);湖南省科技厅科技计划项目(2010JT4039)

摘　　要：将废旧瓦楞纸板粉碎制取废纸板纤维,与玉米淀粉、聚乙烯醇共混辅以发泡剂偶氮二甲酰胺-氧化锌(AC-ZnO),利用注塑发泡法制备废纸板纤维/淀粉发泡复合材料。采用双料筒毛细管流变仪,研究了甘油-邻苯二甲酸二辛酯(G-DOP)混合塑化剂含量、废纸板纤维含量、相容剂聚丙烯酸(EAA)含量、AC-ZnO含量以及温度对废纸板纤维/淀粉发泡复合材料的流变行为的影响,采用SEM研究了不同熔体黏度对泡孔形态的影响。结果表明:废纸板纤维/淀粉发泡复合材料熔体流动特征表现为假塑性。随着混合塑化剂含量的增加,熔体黏度下降;随着废纸板纤维含量的增加,熔体黏度增加;随着EAA含量的增加,熔体黏度增加;随着AC-ZnO含量的增加,熔体黏度下降;随着温度的升高,熔体黏度先降低后升高。随着熔体黏度的降低,泡孔数量减小,孔径增大,当熔体黏度为900Pa·s时,泡孔合并现象严重。The waste corrugated paper was grinded to paper pulp, and used to prepare the foamed waste paper pulp/starch composites by injection molding foaming with starch, polyving akohol and foamer of azodicarbonamide- zinc oxide（AC- ZnO）. The double-barrel capillary rheometer was used to research the influence of waste paper pulp content, mixed plasticizer of glycerol and dioctyl - phthalate （G - DOP） content, compatilizer of polyacrylic acid （EAA） content, foamer of AC - ZnO content and temperature on the theological behavior of the composites melt. SEM was also used to observe the effect of different viscosity of melt on the cell morphologies. The results show that： the melt performs of the waste paper pulp/starch foam composites are pseudoplastic flow. The viscosity of melt is significantly reduced with the content of mixed plasticizer increasing, decreased with increasing of AC- ZnO content and increased with the content of the waste paper pulp and EAA increasing. The viscosity of melt is firstly decreased with the temperature rising, then increased. The number of cell increases and size of cell becomes smaller with the viscosity decreasing. When the viscosity is 900 Pa s, cells happens to rupture and merge.

关 键 词：废纸板纤维 玉米淀粉 发泡 流变行为 泡孔形态 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ321.5[化学工程—合成树脂塑料工业]