The Effect Of Emulsion Polymerization Technology On Large...

Monodisperse sub-200nm polystyrene nanoparticles were synthesized by a facile one-step emulsion polymerization technology using sodium dodecyl sulfonate (SDS) and 2, 2†²-azobis (2-methylpropionamide) dihydrochloride (AIBA) as the surfactant and initiator, respectively. The in situ neutralization between negatively charged surfactant SDS and positively charged AIBA was used to control the primary particle (or swollen micelle) volume and the extent of the particle coagulation. As the oligomeric radicals with cationic AIBA chain ends were captured by anionic swollen micelles, the electrostatic stability of swollen micelles gradually reduced, further promoting the primary particle coagulation. As a result, the initial particle number decreased with the addition of AIBA. The earlier primary particle coagulation not only enlarged the particle size, but also narrowed the particle size distribution of the final latex particles. This approach was easy to scale-up as a facile industrial t echnology to produce monodisperse polymeric nanoparticles on large scale. Keywords: Emulsion polymerization; Nanoparticle; Monodisperse; Particle coagulation; AIBA 1. Introduction Emulsion polymerization technology is widely applied in many fields including synthetic rubber, thermoplastics, coating, adhesive, and plastic modifier [1–4]. Much of the interest in it derives from the possibilities for the preparation of monodisperse or functional latex particles [5,6]. Until today, the challengesShow MoreRelatedFood Protein Derived Bioactive Peptides ( Bps )5959 Words   |  24 Pagesto their huge potential of use in functional foods and other dietary interventions of disease control and health promotion. However, successful product development is limited by the fact that current manufacturing processes are either difficult to scale up, high in cost, or have the potential to affect the structure-activity properties of these peptides. To overcome these challenges, we have proposed in this review, the use of omic techniques and high throughput simulation models to forecast theRead MoreEvolution Of Nanoscale Science And Technology5337 Words   |  22 Page sand Nanotechnologies have become more significant and have found a lot of applications in many aspects; the synthesis making nanostructured materials with helpful and tunable properties is central to the evolution of nanoscale science and technology. Nanometre scale metal particles exhibit optical, electronic, magnetic and chemical properties which have wonderful technological and scholar value. Among them silver, copper, and gold nanoparticles (NP) offer powerful adsorption bands (Localised SurfaceRead MoreBrief Historical Development and Contributions of Chemistry for Modern Civilization4507 Words   |  19 Pagesresources like ores, rocks, coal, and gas. According to me, Chemistry is the study of the composition and properties of matter. Chemistry answers questions like, What kind of stuff is this sample made of? What does the sample look like on a molecular scale? How does the structure of the material determine its properties? How do the properties of the material change when I increase temperature, or pressure, or some other environmental variable? Chemistry is the study of the reactivity of substances. OneRead MoreThe Extraction of Pectin from Orange Peels13647 Words   |  55 Pages- - - 43-44 CHAPTER FOUR 4.0 Experimental Results and Discussion - - - 45 4.1 Experimental Results - - - - - - 45 4.2 Discussion of Results - - - - - - 48 4.2.1 Effect of Pre-treatment on the yield of Pectin - - 48 2. Effect of Concentration Agent of Extracting Agent on the Yield - - - - - - 48-49 4.2.3 Effect of precipitating Agent on the Yield of pectin - 49 4.2 .2 Colloidal stabilizations of milk solution - - - 49 4.3 Conclusion and Recommendation - - - - 53 REFRENCES -Read MoreDesigning A New Type Of Internal Combustion Engine10284 Words   |  42 Pagesoxides of nitrogen (NOx) and particulate matter (PM). NOx and PM are the two primary pollutants of diesel engines. It was stated by Lloyd and Cackete, that Diesel emissions contribute to the development of cancer; cardiovascular and respiratory health effects; pollution of air, water, and soil; soiling; reductions in visibility; and global climate change. Research on reducing emissions resulted from diesel engines and studies on decreased fuel consumption are being founded worldwide, especially in EU countries