摘要
采用聚乙二醇和异佛尔酮二异氰酸酯为主要原料合成预聚体,A-95改性的MoS2纳米片(N-MoS2)作为封端剂,加入白及多糖(BSP)水溶液作为扩链剂,制备了双重交联的聚氨酯脲水凝胶。采用红外光谱、透射电镜、扫描电镜和X射线衍射对N-MoS2纳米片和凝胶的结构和形貌进行了表征,采用拉伸强度-应变测试和抗菌实验对其力学性能和抗菌性能进行了测试。结果表明,改性的N-MoS2纳米片具有单层或少层结构,在可见光照下对大肠杆菌和金黄色葡萄球菌的抑菌效果明显。水凝胶样品MPUBs的拉伸强度随N-MoS2含量的增加先增大后减小,溶胀率先减小后增大;当N-MoS2纳米片的添加量为2%时,得到的MPUB5凝胶样品的综合性能最佳,溶胀率为177.8%、溶胀拉伸强度达1.28 MPa,并且在2种细菌的培养基中均能观察到明显抑菌圈,显示出良好的抗菌性能。
Double cross-linked polyurethane hydrogels were prepared by using polyethylene glycol and isophorone diisocyanate as main raw material,A-95 modified MoS2(N-MoS2)as ending agent and Bletilla Striata polysaccharide(BSP)solution as chain extender.The structure and morphology of N-MoS2 nanosheets and gels were characterized by FT-IR,TEM,SEM and XRD.The mechanical properties and antibacterial properties of N-MoS2 nanosheets and gels were tested by tensile strength-strain test and antibacterial test.The results show that the N-MoS2 nanosheets have a single or few-layer structure and obvious antibacterial effect against E.coli and S.aureus under visible light.The tensile strength of hydrogel samples(MPUBs)increases firstly and then decreases with the increase of N-MoS2 content,and the swelling rate decreases firstly and then increases.When the addition amount of N-MoS2 is 2%,the comprehensive performance of the MPUB5 gel is the best,the swelling rate is 177.8%,and the tensile strength of the swelling gel is 1.28 MPa.The obvious inhibition zone could be observed in the culture medium of the two kinds of bacteria,showing good antibacterial performance.
作者
陈天雨
许戈文
黄毅萍
鲍俊杰
Tianyu Chen;Gewen Xu;Yiping Huang;Junjie Bao(Key Laboratory of Environmental-Friendly Polymer Materials of Anhui Province,College of Chemistry and Chemical Engineering,Anhui University,Hefei 230601,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2023年第7期33-40,共8页
Polymer Materials Science & Engineering
基金
安徽省高校科学研究项目(KJ2018ZD004)
安徽省自然科学基金资助项目(1808085QE173)。
关键词
二硫化钼
聚氨酯脲水凝胶
双重交联
抗菌
molybdenum disulfide
polyurethane urea hydrogel
double cross-linking
antibacterial
