Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (25): 4601-4604.doi: 10.3969/j.issn.1673-8225.2012.25.009

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Modified nano-silica by two kinds of coupling agents influences the mechanical properties of resin base

Xiao Yue1, Liu Bin1, Wang Jian-ping1, Yu Ting-ting1, Wang Jin-gang2   

  1. 1Second Affiliated Hospital, Stomatology Hospital, Jiamusi University, Jiamusi 154002, Heilongjiang Province, China;
    2Central Hospital of Jiamusi City, Jiamusi 154002, Heilongjiang Province, China
  • Received:2011-11-24 Revised:2011-12-26 Online:2012-06-17 Published:2013-11-04
  • Contact: Wang Jian-ping, Master, Chief physician, Professor, Second Affiliated Hospital, Stomatology Hospital, Jiamusi University, Jiamusi 154002, Heilongjiang Province, China Wjp597286193@ 163.com
  • About author:Xiao Yue, Chief physician, Second Affiliated Hospital, Stomatology Hospital, Jiamusi University, Jiamusi 154002, Heilongjiang Province, China jmsxiaoyue@ 163.com

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Abstract:

BACKGROUND: Polymethyl methacryl (PMMA) is widely used based on its good biocompatibility, good color and ease of molding. However, this material is easy to be fractured because of its poor toughness and hardness.
OBJECTIVE: To study the changes of bending strength, flexural modulus and hardness of PMMA materials induced by modified nano-SiO2 particles which are modified with two kinds of coupling agents.
METHODS: SiO2/PMMA nanocomposites were prepared with 3% nano-SiO2 particles modified by two kinds of coupling agents (KH-570 and KH-502) and PMMA powders. There were four groups, PMMA group, SiO2/PMMA group, KH-570-SiO2/PMMA group and KH-502-SiO2/PMMA group.
RESULTS AND CONCLUSION: The bending strength, flexural modulus and harnesses of the SiO2/PMMA group and the PMMA group had no significant difference (P > 0.05), while the bending strength, flexural modulus and hardness of modified-SiO2/PMMA were obviously increased compared with PMMA group (P < 0.05). The KH-502-SiO2/PMMA had the best bending strength, flexural modulus and harnesses among these groups (P < 0.05). It is indicated that the SiO2/PMMA nanocomposites prepared by adding modified-SiO2 particles into PMMA have better bending strength, flexural modulus and harnesses. Performance improvement is more obvious in KH-502-SiO2/PMMA.

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