Synthesis and application of water resistance and endurance silane coupling agents

耐水耐久硅烷偶联剂的合成及应用

基本信息

批准号：
13470406
负责人：
TERANAKA Toshio
金额：
$ 9.34万
依托单位：
Kanagawa Dental College
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13470406/
关键词：
surface modification silane coupling agent coupling-layer hydrolysis adhesion water resistance resin composite ceramics

项目摘要

The cause of deterioration of the mechanical properties of composites is attributed to the hydrolysis of the silane-coupling layer between the inorganic silica filler, and the organic base resin. In order to improve the endurance of dental composites against hydrolysis, we have synthesized and studied silane coupling agents.Seven experimental composites were prepared, containing fillers, which were modified with either 3-methacryloyloxypropyltrimethoxysilane (3-MPS) or a mixture of 3-MPS and the hydrophobic fluoroalkyltrimethoxysilanes. They were subjected to water immersion for 1,800 days and the Thermal Cycling Test for 30,000 cycles. The composite specimen containing filler modified with a mixture of 3-MPS and methacryloyloxypropyltrimethoxysilane showed no significant on tensile strength. In contrast -MPS modified filler containing composite demonstrated significant decrease after water immersion period and thermal stress.To improve further water resistance of the polysiloxane laye … More r at the silica/resin interface, a mixture of 3-MPS and novel silane coupling agents (MAnbF, n=5,7,9,1) with a hydrophobic fluoroalkyl and methaclyloyl group (i. e. 3{[1'-(perfluoro-5-mathylhexy) methyl-2'-(methacryloyloxy9] ethoxy }propil-trimethoxysilane (MA7bF))were synthesized. The concentration of each silane solution was adjusted with ethanol at 2 mass%, at various weight ratios of MAnbF 10, 20, 30, 50, 70 and 100% to 3-MPS. The tensile bond strength of the resin composites were measured, as well the contact angles of resin monomer mixture to glass plates modified with each silane. MA5bF formed a coupling layer with high bond strength and high water resistance at the silica/resin interface in all concentrations studied. MA7bF, MA9bF and MA11bF formed these layers at concentrations within 10-30%.From the results obtained in this study, it was suggested that the surface modification of the silica with a MA5bF or a mixture of 3-MPS and nonafluorohexyltrimethoxysilane increase the water endurance of resin composite. Less

复合材料机械性能恶化的原因是无机二氧化硅填料和有机基础树脂之间的硅烷偶联层的水解。为了提高牙科复合材料的耐水解性，我们合成并研究了复合材料。制备了七种实验复合材料，其中含有填料，并用 3-甲基丙烯酰氧基丙基三甲氧基硅烷 (3-MPS) 或以下物质的混合物进行改性： 3-MPS 和疏水性氟烷基三甲氧基硅烷经过 1,800 天的水浸泡和 30,000 次热循环测试，而含有 3-MPS 和甲基丙烯酰氧基丙基三甲氧基硅烷混合物改性的复合材料样品的拉伸强度没有显着变化。 -含有复合材料的 MPS 改性填料在水浸泡期和热后表现出显着降低为了进一步提高二氧化硅/树脂界面上聚硅氧烷层的耐水性，将 3-MPS 和新型硅烷偶联剂（MAnbF，n=5,7,9,1）与疏水性氟烷基的混合物和甲基丙烯酰基（即 3{[1'-(全氟-5-甲基己基)甲基-2'-(甲基丙烯酰氧基9]合成乙氧基}丙基三甲氧基硅烷(MA7bF))。每种硅烷溶液的浓度用2质量％的乙醇调节，MAnbF 10、20、30、50、70和100％与3-MPS的重量比不同。测量了树脂复合材料的拉伸粘合强度，以及树脂单体混合物与用每种材料改性的玻璃板的接触角。 MA5bF 在所研究的所有浓度下在二氧化硅/树脂界面处形成了具有高粘合强度和高耐水性的偶联层。MA7bF、MA9bF 和 MA11bF 在 10-30% 的浓度下形成了这些层。有人建议用MA5bF或3-MPS与九氟己基三甲氧基硅烷的混合物对二氧化硅进行表面改性可提高树脂的耐水性复合.更少