Abstract: In order to reduce bacterial damage to materials，new environmentally friendlyUV curable antibacterial coatings was prepared. In this paper，a silicone quaternaryammonium salt antibacterial agent（QAC） was synthesized by a one-step quaternization method. SiO₂ nanogel was used as the carrier，and QAC and silane coupling agents containingacrylic acid double bonds were added to the nanogel in different proportions to obtain a newUV curable organic-inorganic hybrid quaternary ammonium salt antibacterial agent（UV-SiO₂-QAC）. The UV curable antibacterial coatings was prepared by using epoxy acrylate and UV-SiO₂-QAC. The structure of QAC was determined by using H nuclear magnetic resonance（¹H NMR） and fourier transform infrared spectroscopy（FT-IR）. The apparent morphology and thermal properties of the coatings were determined by using scanning electron microscopy（SEM）， thermogravimetric analysis（TGA）， and differential scanning calorimetry（DSC）. The antibacterial properties，double bond conversion，hardness，and tensile strength of the coatingwere tested. The results showed that using antibacterial agent with a molar ratio of QAC tosilane coupling agent of 1∶ 1，the coating had the best antibacterial effect against Staphylococcus aureus at a dosage of 10%. The antibacterial zone reached 12. 5 mm at 0 day and 11.4mm at 5day，the pencil hardness was 2B，the tensile strength was 3. 72 MPa，double bond conversion rate was 81%. The comprehensive performance was the best.

Key words: UV curing, quaternary ammonium salts, antibacterial agent, antibacterial coating, SiO₂ nanogel

摘要： 为了减少细菌对材料的破坏，制备环境友好的新型光固化抗菌涂层，采用季铵化法一步合成了有机硅季铵盐抗菌剂（QAC），以 SiO₂纳米胶为载体，将 QAC与含有丙烯酸双键的硅烷偶联剂按照不同比例接入纳米胶，得到新型 UV固化有机-无机杂化季铵盐抗菌剂（UV-SiO₂-QAC）。将抗菌剂按照不同比例添加到 UV固化环氧丙烯酸酯中，在 UV光辐照下获得抗菌涂层。采用核磁共振波谱仪（¹H NMR）和傅立叶变换红外光谱仪（FT-IR）确定了 QAC的结构，采用扫描电子显微镜（SEM）、热重分析仪（TGA）、差示扫描量热法（DSC）等确定了涂层的表观形貌、双键转化率和热性能，并对涂层的抗菌性能、硬度和拉伸强度进行了测试。结果表明：采用 QAC与硅烷偶联剂物质的量比为 1∶1的抗菌剂，在添加量为 10%时，涂层对金黄色葡萄球菌的抗菌效果最优，抑菌圈直径达到 12. 5 mm，5d后达到 11. 4 mm，铅笔硬度为 2B，拉伸强度为 3. 72 MPa，双键转化率达到 81%，综合性能最佳。

关键词: 光固化, 季铵盐, 抗菌剂, 抗菌涂层, 二氧化硅纳米胶

CLC Number: 

• TQ637