Preparation of monodisperse polystyrene/silver composite microspheres and their catalytic properties

Yougen, Hu; Zhao, Tong; Zhu, Pengli; Sun, Rong

doi:10.1007/s00396-011-2555-0

Cited by 24 publications

(12 citation statements)

References 36 publications

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“…Bên cạnh các pha gia cường như silica [1,7,11], hạt nano kim loại [14], graphene [4,8,10,12] thì khoáng montmorillonite (MMT) là một trong những chất biến tính lí tưởng bởi MMT có cấu trúc 2:1 nên các nhóm OH không nằm ngoài. Vì thế, giữa các lớp (2:1) với nhau không có liên kết hydrogen mà chỉ có liên kết Vander walls yếu, cho nên khoảng cách giữa hai lớp sét (hay khoang sét) dễ được nong rộng ra bởi các ion, nước hoặc hợp chất phân cực khác.…”

Section: Mở đầUunclassified

Synthesis and properties of bone cement based on poly(methyl methacrylate) reinforced by organo-clay

Truong

Mai

et al. 2016

Sci. Tech. Dev. J.

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Poly(methyl methacrylate) (PMMA) and nanocomposites PMMA/nano-clay were widely applied in many different fields. Bone cement is one of the important application which makes artificial bones and joints. The purpose of our study is the improvement of properties of PMMA. Therefore, organo-clay modified by polyethylene oxide (PEO) was used to reinforce the PMMA resin. In order to increase the interaction between PMMA and organo-clay, the in-situ emulsion polymerization has been used to synthesize nanocomposites. Accordingly, nanocomposites with the weight percentage of organo-clay of 1 %, 3 %, 5 %, 7 % increase the thermal and mechanical properties compared to PMMA. These were evidence of the good interaction between PMMA and organo-clay. In addition, PMMA/5 % MMT-PEO nanocomposite is also synthesized by in-situ Pickering emulsion polymerization [3] to compare with the method of emulsion polymerization.

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Section: Mở đầUunclassified

Synthesis and properties of bone cement based on poly(methyl methacrylate) reinforced by organo-clay

Truong

Mai

et al. 2016

Sci. Tech. Dev. J.

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“…Vì thế tính chất cơ lý và khả năng chịu nhiệt của polystyren ngày càng được quan tâm nghiên cứu nhằm thỏa mãn các mục tiêu ứng dụng khác nhau. Bên cạnh các phụ gia như các hợp chất của phospho [13], halogen [14], amonium và các dạng dẫn xuất của chúng thì các pha gia cường như silica [3,19,22], đất sét [4,5,12,17], hạt nano kim loại [30] cũng được đưa vào PS nhằm tăng khả năng chịu nhiệt và tính chất cơ lý. Trong đó, graphit oxit [23,25] hay graphen [10,20,21,27] được biết đến có khả năng gia tăng nhiệt độ phân hủy, chống cháy theo cơ chế pha rắn đồng thời tăng tính năng cơ lý khi được đưa vào polyme nói chung và polystyren nói riêng.…”

Section: Mở đầUunclassified

Synthesis and study on rheological behavior of polystyrene/graphene oxide nanocomposites

Mai

et al. 2013

Sci. Tech. Dev. J.

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Polymer nanocomposites reinforced by graphene oxide is one of the new research and developed from 2005 up to date. In this study, we had successfully fabricated polystyrene/graphene oxide nanocomposite by solution-based method. Graphite oxide was synthesized by the method of Hummers and exfoliated in solvent under the effect of ultrasound. The thermal and mechanical properties of PS/RGO nanocomposites were superitor to original polystyrene. In addition, our research has focused on the effect of graphene oxide to the rheological properties of polystyrene – one of the most important properties of polymer materials.

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“…However, most of practical applications of silver nanoparticles involve thin films deposited on various solid surfaces. Such films can serve as catalytic materials (Yougen et al 2012), anti-reflecting layers (Kachan et al 2006 coatings), antibacterial coatings (Lee et al 2003), and active substrates for spectroscopy (Lee et al 1997). …”

Section: Introductionmentioning

confidence: 99%

Self-assembled silver nanoparticles monolayers on mica-AFM, SEM, and electrokinetic characteristics

2013

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A monodisperse silver particle suspension was produced by a chemical reduction method in an aqueous medium using sodium citrate. The average particle size determined by dynamic light scattering (DLS), transmission electron microscopy (TEM), and atomic force microscopy (AFM) was 28.5 nm. The DLS measurements confirmed that the suspension was stable for the ionic strength up to 3 × 10−2 M NaCl. The electrophoretic mobility measurements revealed that the electrokinetic charge of particles was negative for pH range 3–10, assuming −50 e for pH = 9 and 0.01 M NaCl. Using the suspension, silver particle monolayers on mica modified by poly(allylamine hydrochloride) were produced under diffusion-controlled transport. Monolayer coverage, quantitatively determined by AFM and SEM, was regulated within broad limits by adjusting the nanoparticle deposition time. This allowed one to uniquely express the zeta potential of silver monolayers, determined by the in situ streaming potential measurements, in terms of particle coverage. Such dependencies obtained for various ionic strengths and pH, were successfully interpreted in terms of the 3D electrokinetic model. A universal calibrating graph was produced in this way, enabling one to determine silver monolayer coverage from the measured value of the streaming potential. Our experimental data prove that it is feasible to produce uniform and stable silver particle monolayers of well-controlled coverage and defined electrokinetic properties.

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Preparation of monodisperse polystyrene/silver composite microspheres and their catalytic properties

Cited by 24 publications

References 36 publications

Synthesis and properties of bone cement based on poly(methyl methacrylate) reinforced by organo-clay

Synthesis and properties of bone cement based on poly(methyl methacrylate) reinforced by organo-clay

Synthesis and study on rheological behavior of polystyrene/graphene oxide nanocomposites

Self-assembled silver nanoparticles monolayers on mica-AFM, SEM, and electrokinetic characteristics

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