四针状氧化锌晶须/天然橡胶抗菌医用复合材料的制备  

Preparation of tetra-needle-like zinc oxide whiskers/natural rubber antibacterial medical composites

作　　者：陈晰[1] 简璐璐 张锐明[1] CHEN Xi;JIAN Lulu;ZHANG Ruiming(College of Chemistry and Materials,Longyan University,Longyan 364000,China)

机构地区：[1]龙岩学院化学与材料学院,龙岩364000

出　　处：《复合材料学报》2021年第8期2694-2705,共12页Acta Materiae Compositae Sinica

基　　金：国家级大学生创新创业训练计划项目(201911312011);福建省本科高校一般教育教学改革研究项目(创新创业教育教学改革项目)(FBJG20180119);龙岩市科技计划项目(2018LYF2008)。

摘　　要：将硬脂酸钠改性四针状氧化锌晶须(Sodium stearate-T-ZnOw)超声分散液引入天然胶乳(NRL)基体中,制备了绿色环保的Sodium stearate-T-ZnOw/橡胶(NR)抗菌医用复合材料。系统研究了Sodium stearateT-ZnOw/NR复合材料的综合力学性能、抗菌性能和热稳定性能。结果表明:当Sodium stearate-T-ZnOw含量达3wt%时,Sodium sterate-T-ZnOw/NR复合材料的综合力学性能,相比纯胶,邵尔A硬度,300%定伸应力,拉伸强度,撕裂强度,断裂伸长率,提高了8.6%、25.4%、20.3%、25.6%、6.4%。此时,复合材料的热稳定性能也达到了最大值,相比纯胶,复合材料的起始热降解温度(T_(0))和终止热降解温度(T_(f))分别比纯胶的T_(0)和T_(f)提高了21.2℃和5.9℃。当Sodiumstearate-T-ZnOw含量超过3wt%时,其能在天然胶乳中充分发挥抑制大肠杆菌、金葡萄球菌、鲍曼不动杆菌、表皮葡萄球菌生长的能力,它可以进入细菌细胞,导致细胞壁被破坏,细胞内成分泄漏,细胞死亡。The sodium stearate-tetra-needle-like zinc oxide whiskers(T-ZnOw)/natural rubber(NR) antibacterial medical composites were prepared by introducing the sodium stearate-T-ZnOw ultrasonic dispersion into natural rubber latex(NRL) matrix. The comprehensive mechanical properties,antibacterial properties and thermal stability properties of the composites were systematically studied. The results show that when sodium stearate-T-ZnOw loading of 3 wt%,the mechanical properties and thermal stability properties of the composites achieve optimum results. Compared with the pure NR,the shore a hardness,modulus at 300%,tensile strength,tear strength and elongation at break of composites are increased by 8.6%,25.4%,20.3%,25.6% and 6.4%,respectively;The initial thermal degradation temperature(T_(0)) and the termination thermal degradation temperature(T_(f)) of the composites are increased by 21.2℃ and 5.9℃. When the content of sodium stearate-T-ZnOw exceeds 3 wt%,it can inhibit the growth of Escherichia coli,Staphylococcus aureus,Acinetobacter baumannii and Staphylococcus epidermidis in natural rubber latex. It can enter bacterial cells,resulting in cell wall damage,cell leakage,cell death.

关 键 词：四针状氧化锌晶须 橡胶 天然胶乳 力学性能 抗菌性能 医用复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]