Flexural Strength and Dynamic Mechanical Behavior of Rice Husk Ash Silica Filled Acrylic Resin Denture Base Material

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.

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Thermal stability and dynamic mechanical behavior of acrylic resin and acrylic melamine coatings

Journal of Applied Polymer Science ◽

10.1002/app.13145 ◽

2003 ◽

Vol 91 (1) ◽

pp. 27-34 ◽

Cited By ~ 17

Author(s):

D. K. Chattopadhyay ◽

D. B. Rohini Kumar ◽

B. Sreedhar ◽

K. V. S. N. Raju

Keyword(s):

Thermal Stability ◽

Mechanical Behavior ◽

Acrylic Resin ◽

Dynamic Mechanical ◽

Dynamic Mechanical Behavior

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The Utility of Rice Husk Ash from Biomass Power Plant of Nakhon Ratchasima Province for Synthesis of Nano-Silica for Using Cathode Material of Lithium Ion Battery

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.766.51 ◽

2018 ◽

Vol 766 ◽

pp. 51-57

Author(s):

Onlamee Kamon In ◽

Suthum Srilomsak ◽

Nonglak Meethong

Keyword(s):

Chemical Composition ◽

Silica Nanoparticles ◽

Rice Husk ◽

Rice Husk Ash ◽

Lithium Ion ◽

Physical Structure ◽

Silica Content ◽

Chemical Extraction ◽

Composition Analysis ◽

Sem Images

The high purity nanosilica materials could preparation from different synthesis route. In this research, rice husk ash was extracted into silica powder, by chemical extraction method. Then, chemical composition analysis with XRF technique. In addition, the extracted silica nanoparticles were analyzed by XRD technique. Physical structure of nanoscale particles by SEM imaging. The results showed that the chemical composition of rice husk ash consists mainly of silica. While, the extracted silica nanoparticles had a high silica content of 99.9999%. In addition, silica extracted with silica nanoparticles was confirmed by XRD at position 2θ ≈ 22° and the crystalline extracts were amorphous to the physical characteristics of the SEM images. In the future, nanosilicon powder may be used to synthesize lithium-ion batteries.

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Improve the Quality of the Paper with a Surface Coating of Silica in Rice Husk

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.505.3 ◽

2012 ◽

Vol 505 ◽

pp. 3-7

Author(s):

T. Burana ◽

Nitus Tipsotnaiyana ◽

P. Kajondecha

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Acrylic Resin ◽

Extraction Yield ◽

Color Gamut ◽

Paper Coating ◽

Uniform Size ◽

Silica Sample ◽

Silica Powder ◽

X Ray

Rice husk is a form of agricultural biomass that provides an abundant silicon dioxides source. This study used rice husk ash as a material to prepare paper coating. Silica powder has been synthesized by the refluxing of rice husk ash with HCl 1,2 and 3 M at different time (60 and 120 min.) The silicon dioxide extraction yield reached 85% and was effect by concentration of HCl solution and reaction time. The structure of the obtained silica powder were characterized by X-Ray Fluorescence (XRF), Particle size distribution (PSD), X-Ray diffraction (XRD), CIE L*a*b* (Visible spectrophotometer) and Scanning Electron Microscope (SEM). The highest purity of silica sample were 98.7% SiO2, CIE L*a*b* = 94.79 +0.48 +1.24, ∆E ≈ 3.28 (white powder) and 2Ɵ = 22o (silica). Particle had a uniform size less than 3 μm. The paper coating was made from acrylic resin mixed with synthesized silica that refluxing by HCl 2 M 120 min at different ratio (2%, 4% and 6%) and paper coated with a gravure printing machine. The qualities of paper coating were analyzed from viscosity, Transparency (Density) and color gamut of inkjet printing. The paper coating that mixed synthesized silica from rice husk 4% was highest qualities because have viscosity 358 ± 24.99ctp., Density = 0.19, and widely color gamut.

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