Scholarlink

<p>Polymer parts fabricated by 3D-printing Vat photopolymerization techniques often exhibit inferior mechanical strength and moderate thermal stability compared to conventional manufacturing methods. In the present study, mesoporous silica, type SBA-15, was synthesized by the sol–gel method, functionalized with hexadecyltrimethoxysilane, and subsequently, homogeneously dispersed in a photocurable resin by sonication. The nanocomposite resins were 3D-printed using digital light processing (DLP). Several characterizations, including Fourier transform infrared (FTIR) spectroscopy, UV-Vis spectroscopy, mechanical testing, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and x-ray diffraction, were performed to evaluate the effect of mesoporous silica amount and surface functionalization on the properties of the printed nanocomposites. The FTIR results revealed the successful synthesis and surface functionalization of mesoporous silica, type SBA-15. The measurement of mechanical properties showed that the tensile strength and Young’s modulus of the printed nanocomposite containing 0.25 wt.% SBA-15 outperformed the pure printed resin. The tensile strength increased from 25.8 to 35.6&#xa0;MPa, while the elastic modulus rose from 1.32 to 1.91 GPa, marking an improvement of 38.33% and 44.70%, respectively An enhancement in hardness was obtained mainly in nanocomposites containing functionalized nanoparticles due to better nanoparticle dispersion, as revealed by SEM micrographs. Furthermore, TGA results indicated an improvement in the thermal stability of the printed nanocomposites compared to the pure printed resin. The nanocomposite with 0.25 wt.% functionalized mesoporous silica (H-SBA-15) exhibited a 12&#xa0;°C increase in <i>T</i><sub>d,5</sub>, improving its thermal stability over the unfilled printed resin.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigation on 3D-Printed Mesoporous Silica/Photocurable Resin-Based Nanocomposites: Mechanical, Morphological, and Thermal Properties

  • 期刊论文

  • 发表日期：

    2025年6月2日

查看全文
  • Sofiane Lasmi,
  • Boussaha Bouchoul,
  • Ángel Antonio Marcos-Fernández,
  • Leila Lamiri,
  • Mohamed Hamidouche,
  • Fouzia Zoukrami,
  • Hadjira Guerba

摘要

Polymer parts fabricated by 3D-printing Vat photopolymerization techniques often exhibit inferior mechanical strength and moderate thermal stability compared to conventional manufacturing methods. In the present study, mesoporous silica, type SBA-15, was synthesized by the sol–gel method, functionalized with hexadecyltrimethoxysilane, and subsequently, homogeneously dispersed in a photocurable resin by sonication. The nanocomposite resins were 3D-printed using digital light processing (DLP). Several characterizations, including Fourier transform infrared (FTIR) spectroscopy, UV-Vis spectroscopy, mechanical testing, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and x-ray diffraction, were performed to evaluate the effect of mesoporous silica amount and surface functionalization on the properties of the printed nanocomposites. The FTIR results revealed the successful synthesis and surface functionalization of mesoporous silica, type SBA-15. The measurement of mechanical properties showed that the tensile strength and Young’s modulus of the printed nanocomposite containing 0.25 wt.% SBA-15 outperformed the pure printed resin. The tensile strength increased from 25.8 to 35.6 MPa, while the elastic modulus rose from 1.32 to 1.91 GPa, marking an improvement of 38.33% and 44.70%, respectively An enhancement in hardness was obtained mainly in nanocomposites containing functionalized nanoparticles due to better nanoparticle dispersion, as revealed by SEM micrographs. Furthermore, TGA results indicated an improvement in the thermal stability of the printed nanocomposites compared to the pure printed resin. The nanocomposite with 0.25 wt.% functionalized mesoporous silica (H-SBA-15) exhibited a 12 °C increase in Td,5, improving its thermal stability over the unfilled printed resin.