Preparation of flower-like magnesium hydroxide nanostructure and its influence on the thermal stability of poly vinyl acetate and poly vinyl alcohol

Ghanbari, Davood; Salavati‐Niasari, Masoud; Sabet, Mohammad

doi:10.1016/j.compositesb.2012.09.007

Cited by 120 publications

(41 citation statements)

References 15 publications

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“…Here, we report synthesis of Co 2 FeAl (CFA) nanoparticles using co-precipitation method, recognized as an effective, available and simple method for the production ultrafine materials [8,9], in the presence of a well-known polymeric template, polyvinyl alcohol (PVA) [10]. This study also presents hysteresis loops and first order reversal curves (FORCs) for the detailed description of the magnetic behavior of products.…”

Section: Introductionmentioning

confidence: 96%

Magnetic and Structural Characterizations of Co-based Heusler Nanoparticles Fabricated via Simple Co-precipitation Method

et al. 2015

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Nanoparticles of Co 2 FeAl magnetic alloy was successfully fabricated in the presence of a well-known capping agent, polyvinyl alcohol, as a polymer template. The magnetic properties were studied using hysteresis curve and firstorder reversal curve (FORC) measurements at room temperature. FORC diagrams demonstrated a wide distribution of the coercive field owing to the presence of different particle sizes in products. TEM image also showed that the synthesized samples are composed of some large clusters containing a few smaller particles. The maximum value of magnetization (*76 emu/g) and coercivity (573 Oe) were obtained in the annealed sample with 5°C/min. A wider distribution of grain size with a smaller average of 20.5 nm as well as lower-degree of crystallinity was observed in the sample annealed with higher rate of 10°C/min.

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Section: Introductionmentioning

confidence: 96%

Magnetic and Structural Characterizations of Co-based Heusler Nanoparticles Fabricated via Simple Co-precipitation Method

et al. 2015

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“…Aluminum oxide provides heat insulation by reflecting heat when it accumulates on the surface. It's widely used because of its low cost and non-toxicity and easy to incorporate into various thermo-sets polymers [1][2][3][4][5]. One of the main disadvantages of nonnanostructure Al(OH) 3 is that for pass flame retardancy tests, 30-65 wt% of aluminum hydroxide is required.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Al(OH)3, Al2O3 Nanoparticles and Polymeric Nanocomposites

et al. 2015

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Applying of the most toxic halogenated and aromatic flame retardants is limited with respect to the environmental requirements. Nontoxic Al(OH) 3 nanoparticles were synthesized via a simple surfactant-free precipitation reaction at room temperature. The effect of various precipitation-agents on the morphology of the products was investigated. Al(OH) 3 nanoparticles were added to the polysulfone and poly styrene (PS) matrices. Electron microscope images show excellent dispersion of aluminium hydroxide in PS matrix. Nanoparticles appropriately enhanced both thermal stability and flame retardant property of the polymeric matrices. The enhancement of flame retardancy is due to endothermic decomposition of Al(OH) 3 that absorbs heat and simultaneously releases of water (makes combustible gases diluted and cold). Dispersed nanoparticles play the role of a barrier layer against flame, oxygen and polymer volatilization. Al(OH) 3 was converted to Al 2 O 3 and its photo-catalyst property in degradation three different organic dyes as pollutants was investigated.

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“…The sample is classified V-2 if it satisfies the combustion time criteria of V-1, but flaming drips are allowed. Materials are ranked as N.C. in UL-94 tests when the maximum total flaming time is above 50 s [24][25][26][27][28].…”

Section: Materials and Physical Measurementsmentioning

confidence: 99%

“…The use of halogen-free flame retardants is widespread due to the increasing concern about the health and environmental risks. The scientific literature contains very diverse strategies for improving fire resistance of poly vinyl alcohol and cellulose acetate [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Sonochemical Synthesis of Spherical Silica Nanoparticles and Polymeric Nanocomposites

2015

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In this work spherical SiO 2 nanoparticles were synthesized by sonochemical method using a new Schiff-base as a capping agent. The silica nanoparticles were obtained by hydrolysis of tetraethyl orthosilicate in aqueous alcohol solution. The effect of different parameters such as molar concentration of Schiffbase ligands and ultrasonic irradiation on the morphology and size of the products was examined. The results demonstrated that applying the appropriate amount of Schiff-base could be effective in control of particle size. The influence of SiO 2 nanostructures on the flame retardancy of the poly styrene, poly vinyl alcohol, cellulose acetate and ethyl cellulose was studied. In-situ and ex situ nanocomposites were investigated and results confirm that flame retardancy of in situ nanocomposites were better than ex situ samples. HOÁÁÁSi-O-SiÁÁÁOH barrier prevents reaching of flame, heat and oxygen to the polymeric nanocomposites.

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Preparation of flower-like magnesium hydroxide nanostructure and its influence on the thermal stability of poly vinyl acetate and poly vinyl alcohol

Cited by 120 publications

References 15 publications

Magnetic and Structural Characterizations of Co-based Heusler Nanoparticles Fabricated via Simple Co-precipitation Method

Magnetic and Structural Characterizations of Co-based Heusler Nanoparticles Fabricated via Simple Co-precipitation Method

Synthesis and Characterization of Al(OH)3, Al2O3 Nanoparticles and Polymeric Nanocomposites

Sonochemical Synthesis of Spherical Silica Nanoparticles and Polymeric Nanocomposites

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