仿生荷叶结构的聚氨酯基防水透湿膜的制备及性能.pdfVIP

耐水压为54.9kPa，透湿率（正杯法）为4775g·m-2·d-1以及断裂强力为13.7MPa。

（3）本文结合静电纺丝与静电喷雾技术成功制备出具有仿生荷叶结构的

TPU/PMHS/SiO2纳米纤维复合膜。掺杂无氟疏水剂PMHS以降低复合膜的表面能，从而提

升纤维膜的疏水性能。此外，为了在纤维基底膜表面构筑仿生荷叶的微/纳米级粗糙结构，采

用静电喷雾技术引入无氟气相SiO纳米粒子，进一步提升了纤维膜的耐水性能。实验结果表

2

明，仿生荷叶结构的TPU/PMHS/SiO2纳米纤维膜具有良好的透湿和透气性能以及耐水性，

其水接触角可以达到142°，透湿率（正杯法）达到5169g·m-2·d-1，透气性为6.9mm·s-1。

关键词：无氟聚氨酯；仿生荷叶结构；防水透湿膜；静电纺丝

PREPARATIONANDPROPERTIESOF

POLYURETHANE-BASEDWATERPROOFANDBREATHABLE

MEMBRANEWITHBIOMIMETICLOTUSLEAF

STRUCTURES

ABSTRACT

Waterproofbreathablemembraneshavethedualabilitytoresistthepenetrationofliquidwater,

whileconcurrentlypermittingthepassageofwatervapor.Thesematerialshaveattracted

considerableattentionduetotheirextensivepotentialapplicationsindiversefieldssuchashealthcare,

outdoorclothingandseawatertreatment.Inrecentyears,inresponsetothesustainabledevelopment

strategyandthecontinuousgrowthofmarketdemandforfluorinatedwaterproofandmoisture

permeablematerials,somecompaniesandresearchershavealsodevelopedsomefluorine-freeor

low-fluorinatedwaterproofandbreathablemembraneproductsinordertoseekdifferentiated

competitiveadvantagesinthemarket.Therefore,preparingfluorine-freewaterproofandbreathable

membraneswithexcellenthydrophobicityandelasticitypropertiesischallenging.Inaddition,

electrospinningisoftenrecognizedasanefficientandlow-costpreparationtechnique.Waterproof

andbreathablemembraneswiththree-dimensionalporousstructurecanbepreparedbyoptimizing

thespinningparameters.Notably,thecombinationofelectrostaticspinningandfinishingprocesses

canalsofurtherenhancethewaterproofandmoisturepermeableproperties