CAJ | 학술논문

采用紫外辐照法将 N-异丙基丙烯酰胺(NIPAAm)接枝于聚氨酯(PU)膜表面,得到聚氮异丙基丙烯酰胺接枝改性 PU 膜(PU-g-PNIPAAm )。采用SEM和IR对接枝前后PU膜的形貌结构及成分进行表征分析,计算其接枝率和透湿率,并考察其在不同温度下的溶胀性能。结果表明,PNIPAAm 通过紫外辐照成功接枝于PU膜表面；当NIPAAm 单体浓度为5%(质量分数)时,接枝率最高；PU 膜的透湿率在接枝后显著降低,更接近于人体皮肤；PU-g-PNIPAAm膜在32℃附近发生明显的溶胀行为变化。该接枝改性多孔膜有望用作人工皮肤的表皮材料。
채용자외복조법장 N-이병기병희선알(NIPAAm)접지우취안지(PU)막표면,득도취담이병기병희선알접지개성 PU 막(PU-g-PNIPAAm )。채용SEM화IR대접지전후PU막적형모결구급성분진행표정분석,계산기접지솔화투습솔,병고찰기재불동온도하적용창성능。결과표명,PNIPAAm 통과자외복조성공접지우PU막표면；당NIPAAm 단체농도위5%(질량분수)시,접지솔최고；PU 막적투습솔재접지후현저강저,경접근우인체피부；PU-g-PNIPAAm막재32℃부근발생명현적용창행위변화。해접지개성다공막유망용작인공피부적표피재료。
N-isopropyl acrylamide (NIPAAm)grafted polyurethane (PU)was prepared by UV irradiation.The grafted PU membrane was observed by SEM and its compositions was analyzed by IR.In addition,the grafting ratio and the water vapor transmission rate were calculated,and the swelling behavior in different temperatures was studied.The results show that,NIPAAm has been grafted onto PU membrane successfully and the graft-ing ratio was up to the maximum when the concentration of NIPAAm monomer was 5wt%;the water vapor transmission rate has dropped obviously and was more close to that of human skin;also,the swelling behavior of PU-g-PNIPAAm membrane has changed dramatically at near 32 ℃,which was the lower critical solution temperature (LCST)of PNIPAAm hydrogel.So,the PU-g-PNIPAAm membrane has the potential to be used as the epidermis of artificial skin.