摘要
采用艾粉(WP)对传统的热固性塑料环氧树脂(EP)进行抗菌改性以制备具有抗菌功能的EP,解决EP被细菌侵蚀而引起的寿命缩短和卫生问题,并研究了抗菌EP固化过程的动力学问题,从而了解WP对其固化行为的影响,为其选择合理的加工条件奠定理论基础。采用复合填充改性的方法,将天然抗菌剂WP引入EP基体中,利用非等温和等温差示扫描量热(DSC)研究了环氧树脂/艾粉(EP/WP)抗菌复合材料的固化行为。结果表明:随着WP添加量的增加,复合材料抗菌率也增大,当WP添加量为20%(即EP/20%WP)时,复合材料对大肠杆菌和金黄色葡萄球菌的抗菌率达到100%。纯EP的固化活化能E_(a)为74.80 kJ/mol,EP/20%WP的固化活化能E_(a)为68.17 kJ/mol,说明WP的加入促进了EP的固化,使其固化活化能降低。通过理论模型分析发现,加入WP的EP固化行为符合自催化机理。
Wormwood powder(WP)was used to perform antibacterial modification on traditional thermosetting plastic epoxy resin(EP)to prepare EP with antibacterial function,so as to solve the problems of shortening life span and hygiene caused by bacterial erosion of EP.The dynamics of curing process of antibacterial EP was studied,so as to understand the influence of WP on its curing behavior.It lays a theoretical foundation for selecting reasonable processing conditions.The curing behavior of EP/WP was studied by DSC.The results showed that the antibacterial rate of the composites increased with the addition of WP.When the addition of WP was 20%,the antibacterial rate of the composites against Escherichia coli and Staphylococcus aureus reached 100%.The curing activation energy E_(a) of pure EP was 74.80 kJ/mol,EP/20%WP was 68.17 kJ/mol,indicating that the addition of WP promoted the curing of EP and reduced its curing activation energy.Through theoretical model analysis,it was found that the curing behavior of EP with WP was consistent with the autocatalytic mechanism.
作者
王帅
梁家宇
戚嵘嵘
WANG Shuai;LIANG Jia-yu;QI Rong-rong(School of Chemistry and Chemical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)
出处
《塑料科技》
CAS
北大核心
2024年第8期28-33,共6页
Plastics Science and Technology
基金
上海交通大学绍兴研究院开放资助项目(JDSX2022054)。
关键词
艾粉
环氧树脂
固化行为
非等温和等温DSC
Wormwood powder
Epoxy resin
Curing behavior
Non-isothermal and isothermal DSC
