Surface modification of microporous polyurethane membrane with poly(ethylene glycol) to evelop a novel membrane
Surface modification of microporous polyurethane membrane with poly(ethylene glycol) to evelop a novel membrane
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DOI：
10.1016/j.memsci.2005.08.004
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发表时间：
2006-04-05
影响因子：
9.5
通讯作者：
Obendorf, SK
中科院分区：
文献类型：
--
作者：
Tan, K;Obendorf, SK
为了研制一种新型的防护服用微孔聚氨酯膜，采用不同分子量的聚乙二醇（PEG）接枝聚合法对其表面进行改性。确定了表面接枝，确定了合适的接枝时间和接枝温度。聚乙二醇对微孔聚氨酯膜进行表面改性后，其亲水性得到了改善。通过图像分析和毛细管流孔仪对PU膜的孔径分布进行分析，发现PU膜的表面孔径减小，散装PU膜的贯通孔收缩部分减小。减小的孔径有望通过减少有害颗粒和液体传播病原体渗透的可能性来增强屏障性能。水蒸气透过率（WVTR）测试表明，改性PU膜的孔隙对含水量有响应。(c) 2005 Elsevier B.V.版权所有
To develop a novel microporous membrane that responds to moisture/liquid content for use in protective clothing, the surface of microporous polyurethane membrane was modified by graft polymerization with different molecular weights of poly(ethylene glycol) (PEG). Surface grafting was confirmed, and appropriate grafting time and temperature were determined. The hydrophilicity of microporous polyurethane membranes was improved after surface modification with PEG. Both the surface pore sizes of the PU membranes and the constricted parts of through pore sizes of the bulk PU membranes were reduced, as revealed by the pore size distribution using image analysis and capillary flow porometer, respectively. The reduced pore sizes are expected to enhance the barrier properties by reducing the possibility of harmful particles and liquid borne pathogen penetration. Water vapor transmission rate (WVTR) measurements indicated that the pores of the modified PU membranes were responsive to the moisture content. (c) 2005 Elsevier B.V. All rights reserved.