熔喷非织造用聚(3-羟基丁酸-co-3-羟基戊酸共聚酯)/聚乳酸双组分生物降解材料的可纺性能  

Study on spinnability of biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/poly(lactic acid) blends for melt-blown nonwovens

作　　者：朱斐超 韩建[1,2] 于斌[1,2] 余洁[1] 欧璐[1] 

机构地区：[1]浙江理工大学材料与纺织学院,浙江杭州310018 [2]浙江理工大学"产业纺织材料制备技术"浙江省重点实验室,浙江杭州310018

出　　处：《纺织学报》2016年第2期21-26,共6页Journal of Textile Research

基　　金：国家自然科学基金资助项目(51203141);"产业用纺织材料技术"浙江省重点科技创新团队项目(2011R50003)

摘　　要：采用熔融共混法制备了质量比为100/0、75/25、50/50、25/75、0/100的熔喷非织造用PHBV/PLA共混材料,分别采用热重分析法(TG)、熔融指数法(MFI)、热台偏光镜法(POM)和毛细管流变法对共混材料的可纺性能进行了研究,并对其初生纤维的纺丝性能给予了初步评价。研究表明:PHBV的热稳定性差,加工窗口窄且熔体流动性差,PHBV/PLA共混材料的热稳定性和熔体流动性明显改善;PHBV结晶速率快,PLA对PHBV的结晶具有稀释作用;PHBV/PLA共混物为典型的切力变稀型流体,PHBV对温度和剪切速率变化敏感度高,PHBV/PLA共混材料的表观黏度随PLA含量的提高而有所增大,但均小于纯PLA;PHBV纤维发黏现象严重,纺丝困难,随着共混材料中PLA含量的提高,纺丝性能提高,初生纤维表面变得光滑。Poly （3-hydroxybutyrate-co-3-hydroxyvalerate） （ PHBV ） and poly （ lactic acid ） （ PLA ） blends for melt-blown nonwovens with different ratios （ 100/0,75/25,50/50, 25/75,0/100 ） were prepared by melt mixing. The thermal properties, melt flowing indexes, crystallization and theological behaviors of PHBV/PLA blends were investigated, and its as-spun fiber was also prepared to evaluate the spinnability of the blends. The results showed that pure PHBV had poor thermal stability, narrow processing window and low melt flowing rate, and blended with PLA improved the thermal stability and melt fluidity of PHBV; pure PHBV also had fast crystallization rate with nucleating agent and PLA had a dilution effect on the crystallization of PHBV; PHBV had high sensitivity to the temperature and shear rate changes, PHBV/PLA blends had mixing characteristic of shear thinned liquid and the apparent viscosity of blends increased with the increasing of the content of PLA but was less than pure PLA; and PHBV had poor spinnability with serious sticky situation and low drawing ratio of as-spun fiber, but it could be improved by the blending of PLA and the surface also became smoother.

关 键 词：聚(3-羟基丁酸-co-3-羟基戊酸共聚酯) 聚乳酸 可纺性能 熔喷 

分 类 号：TS172[轻工技术与工程—纺织材料与纺织品设计]