title: Surface modification of quartz fibres for dental composites through a sol-gel process.
abstract: In this study, quartz fibres (QFs) surface modification using a sol-gel method was proposed and dental posts reinforced with modified QFs were produced. A silica sol (SS) was prepared using tetraethoxysilane (TEOS) and 3-methacryloxypropyltrimethoxysilane (γ-MPS) as precursors. The amount of γ-MPS in the sol-gel system was varied from 0 to 24wt.% with a constant molar ratio of TEOS, ethanol, deionized water, and HCl. Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), and contact angle (CA) measurements were used to characterize the modified QFs, which confirmed that SS had successfully coated the surface of QFs. SEM images showed good interfacial bonding between the modified QFs and the resin matrix. The results of three-point bending tests of the fibre reinforced composite (FRC) posts showed that the QFs modified by SS with 12wt.% γ-MPS presented the best mechanical properties, demonstrating improvements of 108.3% and 89.6% for the flexural strength and flexural modulus, respectively, compared with untreated QFs. Furthermore, the sorption and solubility of the prepared dental posts were also studied by immersing the posts in artificial saliva (AS) for 4weeks, and yielded favourable results. This sol-gel surface modification method promises to resolve interfacial bonding issues of fibres with the resin matrix, and produce FRC posts with excellent properties.
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, PR China.
authors.forename: Yazi
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, PR China; Yanfeng Plastic Omnium Automotive Exterior Systems Co., Ltd., Shanghai 201805, PR China.
authors.forename: Renlin
authors.initials: R
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Université de Montréal, CP 6128, Succ. Centre-ville, Montreal, Quebec, Canada.
authors.forename: Eric
authors.initials: E
authors.lastname: Habib
authors.affiliation: Department of Chemistry, Université de Montréal, CP 6128, Succ. Centre-ville, Montreal, Quebec, Canada.
authors.forename: Ruili
authors.initials: R
authors.lastname: Wang
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, PR China.
authors.forename: Qinghong
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, PR China. Electronic address: sunbin@dhu.edu.cn.
authors.forename: Bin
authors.initials: B
authors.lastname: Sun
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, PR China. Electronic address: zhumf@dhu.edu.cn.
authors.forename: Meifang
authors.initials: M
authors.lastname: Zhu
mesh_terms: D000327:Adsorption; D003764:Dental Materials / Q000737:chemistry*; D005782:Gels / Q000737:chemistry*; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011791:Quartz / Q000737:chemistry*; D012464:Saliva, Artificial / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013818:Thermogravimetry
chemical_list: C542237:3-methacryloxypropyltrimethoxysilane; D003764:Dental Materials; D005782:Gels; D008689:Methacrylates; D012464:Saliva, Artificial; D012821:Silanes; D011791:Quartz; C040733:tetraethoxysilane; D012822:Silicon Dioxide
keywords: Fibre reinforced composite post; Quartz fibres; Sol-gel method; Surface modification