Fabrication of PMMA nanocomposite biomaterials reinforced by cellulose nanocrystals extracted from rice husk for dental applications  

作　　者：Ahmed FOULY Walid M.DAOUSH Hesham I.ELQADY Hany S.ABDO 

机构地区：[1]Mechanical Engineering Department,College of Engineering,King Saud University,Riyadh 11421,Saudi Arabia [2]The King Salman Center for Disability Research,Riyadh 11421,Saudi Arabia [3]Department of Production Engineering and Mechanical Design,Faculty of Engineering,Minia University,Minia 61519,Egypt [4]Department of Chemistry,College of Science,Imam Mohammad Ibn Saud Islamic University(IMSIU),Riyadh 11623,Saudi Arabia [5]Faculty of Technology and Education,Helwan University,Cairo 11281,Egypt [6]Faculty of Engineering,Aswan University,Aswan 81528,Egypt [7]Center of Excellence for Research in Engineering Materials(CEREM),King Saud University,Riyadh 11421,Saudi Arabia [8]Mechanical Design and Materials Department,Faculty of Energy Engineering,Aswan University,Aswan 81521,Egypt

出　　处：《Friction》2024年第12期2808-2825,共18页摩擦（英文版）

基　　金：the King Salman Center for Disability Research for funding this work through Research Group(No.KSRG-2023-538).

摘　　要：The primary objective of global studies is to develop the properties and durability of polymers for various applications.When it comes to dental disability,denture base materials must have sufficient mechanical and tribological performance in order to withstand the forces experienced in the mouth.This work aims to investigate the effects of the addition of low content of cellulose nanocrystals(CNC)on the mechanical and tribological performance of the polymethyl methacrylate(PMMA)nanocomposites.Different weight percent of CNC(0,0.2,0.4,0.6,and 0.8 wt%)were added to the PMMA matrix followed by ball milling to evenly distribute the nanoparticles reinforced phase in the matrix phase.The findings emphasize the significant impact of CNC integration on the performance of PMMA nanocomposites.By increasing the content of the CNC nanoparticles,the mechanical properties of PMMA were improved.In addition,the tribological outcomes demonstrated a significant reduction in the friction coefficient besides an enhancement in the wear resistance as the weight percentage of nanoparticles increased.The surface of the worn samples was investigated by utilizing SEM to identify the wear mechanisms corresponding to the different compositions.In addition,a finite elment model(FEM)was developed to ascertain the thickness of the worn layer and the generated stressed on the surfaces of the nanocomposite throughout the friction process.

关 键 词：polymethyl methacrylate nanocomposite cellulose nanocrystals denture materials rice husk polymethyl methacrylate(PMMA) wear resistance 

分 类 号：TH117[机械工程—机械设计及理论]