Journal ArticleDOI
Flexural Strength and Dynamic Mechanical Behavior of Rice Husk Ash Silica Filled Acrylic Resin Denture Base Material
Panjaporn Wongwitthayakool,Tanittha Sintunon,Wichaya Tanagetanasombat,Pongkarn Soonthornchai,Ahmed A. Abbas +4 more
Reads0
Chats0
TLDR
In this article, the microhardness, flexural strength and dynamic mechanical properties of RHA-Si filled poly(methyl methacrylate) (PMMA) or acrylic resin powder were determined.Abstract:
Silica extracted from rice husk ash (RHA-Si) by pretreatment with hydrochloric acid followed by calcination at 700°C, was prepared. It was investigated with regard to its chemical composition and structure using X-Ray Fluorescence spectroscopy (XRF) and X-Ray Diffractometry (XRD). RHA-Si (0, 0.25, 0.5 and 1% w/w) was incorporated into poly(methyl methacrylate) (PMMA) or acrylic resin powder. Microhardness, flexural strength and dynamic mechanical properties of RHA-Si filled PMMA were then determined. The chemical composition analysis showed that RHA-Si contains a large amount of silica with an amorphous structure. The microhardness of acrylic resin filled with RHA-Si does not change significantly with increasing RHA-Si loading. Flexural strength of filled acrylic resin increases with increasing RHA-Si loadings up to 0.25% w/w. It then decreases with increasing RHA-Si loadings. Dynamic mechanical behavior illustrates that polymer-filler interactions play an important role in reinforcement.read more
Citations
More filters
Journal ArticleDOI
Utilization of Silica Nanoparticles from Rice Husks for Improving the Mechanical Properties of Dental Materials: A Literature Review
TL;DR: In this article , a literature review aims to describe the method of synthesizing silica nanoparticles from rice husks and their effectiveness in improving the mechanical properties of dental materials, including fillers and reinforcements.
Journal ArticleDOI
Capability of Rice Husk Silica on Flexural Improvement in Metal Ceramic Restoration
TL;DR: This study investigates the effect of silica added to commercially opaque porcelain powder in increasing the flexural strength of metal ceramic restoration (MCR), and concludes that adding 0.5% silica resulted in the optimal flexuralstrength of MCR.
Journal ArticleDOI
The Effectiveness of Adding Rice Husk Nanosilica to the Flexural Strength of Opaque Porcelain Coatings on Metal Ceramic Dental Crowns
TL;DR: There is an increase in the flexural strength of metal ceramic crowns with the addition of 0.25% silica, and the effectiveness of nano-silica particles from rice husks on the flexures strength of the opaque layer on Co-Cr metal-ceramic crowns is determined.
References
More filters
Book
Phillips' Science of Dental Materials
TL;DR: The science of dental materials is studied in detail in the context of toothpastes, using X-ray diffraction analysis for the determination of particle numbers.
Journal ArticleDOI
Preparation of Silica from Rice Husks
TL;DR: In this paper, preliminary leaching of rice husks with a solution of hydrochloric acid before their combustion at 600°C is shown to be required to obtain relatively pure silica (∼99.5%) with a high specific surface area that is maintained even after heating at 800°C.
Journal ArticleDOI
PMMA denture base material enhancement: a review of fiber, filler, and nanofiller addition.
Mohammed M. Gad,Shaimaa M. Fouda,Shaimaa M. Fouda,Fahad A. Al-Harbi,Ritva Näpänkangas,Aune Raustia,Aune Raustia +6 more
TL;DR: There is no ideal denture base material, but the properties of PMMA could be improved with some modifications, especially with silanized nanoparticle addition and a hybrid reinforcement system.
Journal ArticleDOI
Comparison of reinforcing efficiency between Si-69 and Si-264 in a conventional vulcanization system
TL;DR: In this paper, two types of silane coupling agents, e.g., bis -(3-triethoxysilylpropyl) tetrasulfane (Si-69) and 3-thiocyanatopropyl triethoxy silane (si-264), were selected for comparison of their reinforcing efficiency in a conventional vulcanization (CV) system.
Journal ArticleDOI
Conversion of rice hull ash into soluble sodium silicate
TL;DR: In this article, rice hull ash (RHA) and aqueous sodium hydroxide were used in open and closed reaction systems to produce a closed closed system at 200 °C.