聚乳酸超细纤维敷料的熔喷成形工艺及其快速导液特性  

Preparation and fast wettability of polylactic acid micro-nanofibrous dressing by melt blowing process

作　　者：王镕琛 张恒 翟倩 刘瑞焱 黄鹏宇 李霞 甄琪 崔景强 WANG Rongchen;ZHANG Heng;ZHAI Qian;LIU Ruiyan;HUANG Pengyu;LI Xia;ZHEN Qi;CUI Jingqiang(School of Textile,Zhongyuan University of Technology,Zhengzhou,Henan 451191,China;Henan Key Laboratory of Medical Polymer Materials Technology and Application,Xinxiang,Henan 453400,China;School of Clothing,Zhongyuan University of Technology,Zhengzhou,Henan 451191,China;Henan Tuoren Medical Device Co.,Ltd.,Xinxiang,Henan 453400,China)

机构地区：[1]中原工学院纺织学院,河南郑州451191 [2]河南省医用高分子材料技术与应用重点实验室,河南新乡453400 [3]中原工学院服装学院,河南郑州451191 [4]河南驼人医疗器械集团有限公司,河南新乡453400

出　　处：《纺织学报》2024年第1期30-38,共9页Journal of Textile Research

基　　金：国家自然科学基金项目(52003306);河南省高等学校重点科研项目(23A540003);河南省重大科技专项资助项目(221100310500);河南省医用高分子材料技术与应用重点实验室项目(1-TR-B-03-220317)。

摘　　要：为拓展聚乳酸(PLA)超细纤维非织造材料在医用敷料领域的应用,以聚乙二醇(PEG)、十二烷基硫酸钠(SDS)共混改性PLA为原料,利用熔喷非织造成形方法制备PLA/PEG/SDS超细纤维材料,并对其结构和导液特性进行测试与分析。结果表明:随着SDS质量分数由0%增大到1.5%,PLA/PEG/SDS共混聚合物的冷结晶温度从116.02℃降至93.58℃(降低约23.9%),熔融温度从164.10℃降至150.58℃(降低约8.9%);材料中超细纤维(纤维直径<5μm)的数量占比从0%增大至57%,同时5μL水的浸没时间从0.24 s降低至0.06 s,液体扩散面积从36.05 cm^(2)增大至78.26 cm^(2),吸水速率从4.38%/s提升至9.15%/s,液态水分扩散速率从2.21 mm/s提升至8.34 mm/s,表明液体导液特性有所提升,可用做敷料和补片等医用护理材料的基材。Objective Polylactic acid(PLA)micro-nanofibrous nonwovens have weak hydrophilicity and low cell adhesion,adversely affecting wound healing,and are more likely to cause inflammation when used for preparing dressings.This considerably limitsthe effective use of PLA micro-nanofibrous nonwovens in the healthcare sector.Therefore,it is necessary to modify PLA hydrophilicity to improve itsuse in healthcare applications.Method Polyethylene glycol(PEG),sodium dodecyl sulfate(SDS)and polylactic acid are fused and blended.PLA blending raw materials with the SDS mass ratio of 0%,0.3%,0.6%,0.9%,1.2%and 1.5%are fed into screw extruder to melt.The melt is quantitatively transported to the spinneret hole of the die head by the pump and extruded in the form of melt stream through the spinneret hole.PLA micro-nanofibrous are formed by melt microflow under the action of high temperature and high-speed air flow at the die,which are then collected on the receiving screen after drafting and self-bonded to form PLA micro-nanofibrous nonwovens.Finally,the PLA micro-nanofibrous dressing is prepared by thermal lamination of the PLA micro-nanofibrous nonwoven and the viscose spunlaced nonwoven.Results The contact angle of the sample free of SDS was 116°(>90°)and did not change with time.With the increase of SDS ratio,the wetting time of the sample was gradually shortened.When the SDS ratio reached 1.5%,the dropletscould be completely spread on the material in 0.06 s,and the sample showed super hydrophilic effect at this time.The absorption intensities of infrared curves at 1080 and 1750 cm-1 were enhanced after SDS addition,indicating that the ester group of PLA fiber increased after SDS addition,so the dynamic contact angle of the sample with SDS addition decreased at the same time,and the liquid conductivity of the sample was enhanced compared with that without SDS addition.The diffusion area of liquid on PLA micro-nanofibrous nonwovens increased from 36.05 cm^(2) to 78.26 cm^(2),which increased by 117.08%.The wetting time of the surf

关 键 词：非织造材料 熔喷技术 超细纤维 聚乳酸 聚乙二醇 十二烷基硫酸钠 亲水改性 敷料 

分 类 号：TS172[轻工技术与工程—纺织材料与纺织品设计]