摘要
为解决智能防水透湿膜材料温敏响应度低和温敏透湿通量不足的问题,将聚N-异丙基丙烯酰胺(PNIPAM)通过涂覆的方式复合于具有多级孔结构的聚氨酯(PU)梯度膜上,通过调控PNIPAM的涂覆量制备PNIPAM/PU梯度复合膜,并对复合膜的结构、温敏亲-疏水性和温敏湿热传递性进行研究。结果表明:PNIPAM温敏层的构筑不仅没有改变膜材料的多级孔结构,还赋予了梯度复合膜材料温敏亲-疏水转变性能,即低于转变温度(30℃)时表现为亲水性,高于转变温度时表现为疏水性;PNIPAM的引入提高了梯度复合膜的温敏透湿通量,50℃时PNIPAM质量分数为6%的梯度复合膜的透湿率为6398.3 g/(m^(2)·24 h),高于PU膜的透湿率(4843.4 g/(m^(2)·24 h)),且PNIPAM的质量分数越高,梯度复合膜的溶胀性随温度的增加下降越显著。
To improve the temperature-sensitivity and moisture permeability of intelligent waterproof and moisture permeable membrane,poly-N-isopropylacrylamide(PNIPAM)was coated on hierarchical pore polyurethane(PU)membranes and PNIPAM/PU gradient composite membranes were prepared by adjusting the mass fraction of PNIPAM.Structure,thermo-sensitive hydrophilic-hydrophobic and thermo-sensitive moisture permeability were investigated.The results show that the construction of PNIPAM does not change the hierarchical pore structure.It has thermo-sensitive hydrophilic-hydrophobic transition properties,exhibiting hydrophilicity when temperature below the transition temperature(30℃),and hydrophobicity when temperature above this temperature.Meanwhile,the introduction of PNIPAM improves thermo-sensitive moisture permeability,from 4843.4 g/(m^(2)·24 h)of PU to 6398.3 g/(m^(2)·24 h)of PNIPAM/PU gradient composite membrane at 50℃when mass fraction of PNIPAM is 6%.It was also found that the higher the content of PNIPAM,the more significant decrease in swelling property with the temperature increase.
作者
杨群
梁琦
王黎明
代正伟
YANG Qun;LIANG Qi;WANG Liming;DAI Zhengwei(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China;Shanghai Engineering Research Center for Clean Production of Textile Chemistry, Shanghai 201620, China;Zhejiang Provincial Key Laboratory of Yarn Material Forming and Compound Processing Technology Research, Jiaxing, Zhejiang 314001, China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2021年第9期17-23,38,共8页
Journal of Textile Research
基金
浙江省自然科学基金青年基金项目(LQ18E030006)
上海工程技术大学科研启动项目(0239-E3-0507-19-05165)
浙江省纱线材料成形与复合加工技术研究重点实验室开放基金项目(MTC-2020-23)。
关键词
多级孔
梯度膜
温敏性
亲-疏水转变
透湿性
功能纺织材料
hierarchical pore
gradient membrane
thermo-sensitive
hydrophilic-hydrophobic transition
moisture permeability
functional textile material
