摘要
以二苯甲酮为光敏剂,通过紫外光辐照引发,将N,N-二甲基十四烷基对乙烯基苄基氯化铵(C9H9Cl-14DMA)单体接枝在含有乙烯基的木塑复合材料(WPC)表面,赋予WPC表面抗菌功能。利用XPS光电子能谱和扫描电子显微镜(SEM)对WPC的表面化学组成和形貌结构进行表征,采用抑菌圈法对大肠杆菌进行抑菌活性研究。探讨了单体质量浓度、光敏剂质量浓度、光照时间对接枝率的影响。结果表明,最优的接枝条件为:光敏剂质量浓度0.150 g/mL、单体质量浓度0.800 g/mL、光照时间3 min,接枝率为62.5μg/mm2,接枝后的WPC表面具有良好的抑菌性能。
A new kind of materials was prepared through grafting polymerization of C9H9Cl-14 DMA onto the surface of woodplastic composites initiated by ultraviolet（ UV） with benzophenone as photosensitizer. The surface of WPC materials was decorated to possess antimicrobial function. The XPS and SEM were used to characterize the chemical and morphological changes of wood-plastic composites. The colibacillus were employed to detect the antibacterial activities of these compounds by the inhibition zone method.The factors influencing the grafting-yield were discussed including monomer concentration,the concentration of photosensitizer and irradiation time. The best conditions of grafting effect were with the concentration of photosensitizer 0.150 g /mL,the monomer concentration of 0.800 g /mL,the illumination time of 3 min,and the grafting rate of 62.5 μg /mm2. The obtained materials had good antibacterial effect.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2014年第10期111-114,共4页
Journal of Northeast Forestry University
基金
生物质材料科学与技术教育部重点实验室(东北林业大学)开放基金项目(No2012-01)
黑龙江省大学生创新创业计划资助项目(201310232014)
关键词
木塑复合材料
紫外引发
接枝率
抑菌性
Wood-plastic composites
UV-induced graft modification
Grafting yield
Antibacterial effect
