首页|附着力增强型EG-BPSQ/SiO2防雾减反射涂层的设计及制备

附着力增强型EG-BPSQ/SiO2防雾减反射涂层的设计及制备

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在N2氛围下,以二甲基丙烯酸乙二醇酯(EGD)和3-巯基丙基三甲氧基硅烷(MPTMS)为单体[n(EGD)∶n(MPTMS)=1.0∶2.4],以1,8-二氮杂环[5,4,0]十一碳-7-烯(DBU)为催化剂,经巯-烯点击反应制备了巯醚-酯基桥连倍半硅氧烷(EG-BSQ)前驱体,再与乙酸和NaOH反应得到了EG预聚物(EG-BPSQ);然后,EG预聚物和SiO2溶胶原位水解缩聚制备了EG-BPSQ/SiO2(简称S-EG)复合溶胶;最后,采用浸渍提拉法制备了S-EG复合涂层.采用FTIR、SEM对S-EG复合涂层进行了表征,考察了V(EG预聚物)∶V(SiO2溶胶)及处理温度对制备的 S-EG 复合涂层的静态水接触角、透过率、附着力、防雾性能和减反射性能的影响.结果表明,在 SiO2溶胶中引入EG-BPSQ,可以增强SiO2纳米颗粒彼此之间、涂层与基底之间的黏结性能,EG-BPSQ同时具有着"黏结"与"造孔"的作用.当V(EG预聚物)∶V(SiO2溶胶)=1∶3、处理温度为150℃时,复合涂层(HT-S-EG-3C)光透过率高达 98.5%,比空白基底提高约 8%,附着力均达到 0 级;静态水接触角为 15°,较高的亲水性使其具有防雾效果和减反射性能.
Design and preparation of adhesion-enhanced EG-BPSQ/SiO2 antifogging and antireflective coatings
Thioether-ester-bridged sesquioxane(EG-BSQ)precursor was prepared from mercaptoene click reaction of ethylene dimethacrylate(EGD)and 3-mercaptopropyl trimethoxysilane(MPTMS)[n(EGD)∶n(MPTMS)=1.0∶2.4]at the catalysis of 1,8-diazecyclic[5,4,0]undeca-7-ene(DBU)under N2 atmosphere,and then reacted with acetic acid and NaOH to obtain EG prepolymer(EG-BPSQ),which was further reacted with SiO2 sol through in situ hydrolytic polycondensation to synthesize S-EG composite sols.Finally,EG-BPSQ/SiO2(S-EG for short)composite coatings were obtained via impregnation pulling method,and characterized by FTIR and SEM.The effects of V(EG prepolymer)∶V(SiO2 sol)and treatment temperature on static water contact angle,transmittance,adhesion,anti-fog and anti-reflection performance of S-EG composite coatings were investigated.The results showed that the introduction of EG-BPSQ into SiO2 sol enhanced the bonding between SiO2 nanoparticles as well as coating and substrate,EG-BPSQ displayed the effect of"bonding"and"pore formation"at the same time.When V(EG prepolymer)∶V(SiO2 sol)=1∶3 and treatment temperature 150℃,the transmittability of the composite coating(HT-S-EG-3C)reached up to 98.5%,~8%higher than that of the blank substrate,while the adhesion reached grade 0.Static water contact angle of 15° indicated high hydrophilicity,which led to anti-fog and anti-reflection performance.

antireflectionantifoggingorganic-bridged polysilsesquioxaneadhesionsol-gelfunctional materials

张策、姚孝伟、董勋、杨晓梅、张万斌、张光华

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陕西科技大学 前沿科学与技术转移研究院,陕西省轻化工助剂化学与技术协同创新中心,陕西 西安 710021

陕西科技大学 化学与化工学院,教育部轻化工助剂化学与技术重点实验室,陕西 西安 710021

中交二公局东萌工程有限公司,陕西 西安 710021

减反射 防雾 有机桥连聚倍半硅氧烷 附着力 溶胶-凝胶 功能材料

国家自然科学基金国家自然科学基金陕西省轻化工助剂化学与技术协同创新中心开放课题轻化工助剂化学与技术教育部重点实验室项目

1190422051803111KFKT2022-10KFKT2022-10

2024

精细化工
大连化工研究院设计院 中国化工学会精细化工专业委员会 辽宁省化工研究院

精细化工

CSTPCD北大核心
影响因子:0.557
ISSN:1003-5214
年,卷(期):2024.41(6)
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