Fabrication of starch-based nanospheres to stabilize pickering emulsion

• Published in: Carbohydrate polymers Vol. 88; no. 4; pp. 1358 - 1363
• Main Authors: Tan, Ying, Xu, Kun, Liu, Chang, Li, Yangling, Lu, Cuige, Wang, Pixin
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 16.05.2012; Elsevier
• Subjects: Amphiphilic; Applied sciences; Chemistry; Colloidal state and disperse state; Emulsions. Microemulsions. Foams; Exact sciences and technology; General and physical chemistry; Nanospheres; Natural polymers; pH-responsive; Physicochemistry of polymers; Pickering emulsion; Starch; Starch and polysaccharides; Pickering emulsion; Nanospheres; Amphiphilic; Starch; pH-responsive; Water oil emulsion; Chemical precipitation; Oil water emulsion; Nanoparticle; Emulsifying power; Benzo[c]furan-1,3dione(1,3-dihydro); Experimental study; Corn starch; Acetic anhydride; Esterification; Polyelectrolyte; Particle size distribution; Preparation; Oside polymer; Polyacid; Spherical particle; Starch derivative; Growth from solution; Amphiphilic polymer
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2012.02.018

► Starch-based nanospheres were used as solid particulate emulsifier. ► A amphiphilic group was introduced into the backbone of starch by a simple esterified reaction. ► Amphiphilic starch-based nanospheres were fabricated by a nanoprecipitation procedure. ► Nanospheres adsorbed at the interface between oil and water phase. ► The catastrophic inversion and transitional inversion could be easily achieved. Starch is successively modified by acetic anhydride and phthalic anhydride, and then starch-based nanospheres are fabricated by a simple nanoprecipitation procedure. These pH-responsive amphiphilic starch-based nanospheres of uniform size are used as particulate emulsifiers to stabilize Pickering emulsions. CLSM and SEM characterization find that starch-based nanospheres adsorbed at the interface between oil phase and water phase. Moreover, the catastrophic inversion and transitional inversion of such emulsions can be easily achieved by varied the water/oil volume ratio and pH of aqueous dispersion, respectively.