不同发泡剂制备废纸浆增强淀粉基复合发泡材料性能的对比  

Comparation with performance of waste paper pulp reinforced starch-based foams with different foamer

作　　者：曾广胜[1,2] 林瑞珍[1,2] 郑良杰[1,3] 陈磊[1,2] 孟聪[1,2] 

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,湖南株洲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,湖南株洲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,广西南宁530000

出　　处：《功能材料》2013年第1期51-55,共5页Journal of Functional Materials

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

摘　　要：分别以水、碳酸氢氨、偶氮二甲酰胺/氧化锌(m(AC)/m(ZnO)=2∶1)为发泡剂,废纸浆为增强体,木薯淀粉为基质,聚乙烯醇(PVA)为增韧体,甘油和尿素作为复合增塑剂,辅以其它的各种助剂,利用挤出发泡法制备出可生物降解复合发泡材料,它们分别记作WPS、NPS、APS。并分别讨论和比较这些发泡材料的密度、发泡倍率、吸水性、热稳定性以及泡孔形态。研究结果显示,随着发泡剂含量的增加材料的表观密度先减少后增加,发泡倍率、吸水率则先增加后减少;NPS的热稳定性能最佳,APS稳定性次之,WPS稳定性最差;随着发泡剂含量的增加,材料泡孔数量先增加后减少,孔径先减小后增大,APS泡孔大小较WPS、NPS分布均匀,泡孔数量较WPS、NPS分布多。The foamed composites could be completely biodegradable which was mainly prepared by cassava starch as matrixes,reinforced by waste paper pulp,toughened by PVA,separately foamed by foamer of H2O,NH4HCO3 and AC/ZnO,plasticized by the mixed plasticizer of glycerol/urea and other adjuvants using extrusion foaming method.They were respectively referred as WPS,NPS,APS.Then,the foamed composites apparent density,expansion ratio,water absorption,rebound rate,thermostability and cell morphology were discussed and compared with.The results showed that the apparent density decreased with increasing foamer content,then increasing,while foaming ratio and water absorption increased,then decreasing;the thermostability of NPS was the best,and APS was the second,and WPS was the third.The number of cells firstly increased with increasing foamer content,then decreasing and the side of cells became larger with increasing content of foamer,and the size of APS was more uniform than that of WPS and NPS,and the number of APS was more than that of WPS and NPS.

关 键 词：废纸浆 木薯淀粉 发泡倍率 吸水率 泡孔形态 

分 类 号：TQ321.5[化学工程—合成树脂塑料工业]