Palm olein-in-water Pickering emulsion stabilized by Fe3O4-cellulose nanocrystal nanocomposites and their responses to pH. (2nd January 2017)

• Record Type: Journal Article
• Authors: Low, Liang Ee; Tey, Beng Ti; Ong, Boon Hoong; Chan, Eng Seng; Tang, Siah Ying
• Is Part Of: Carbohydrate polymers. Volume 155(2016)
• Page Start: 391
• Page End: 399
• Publication Date: 2017-01-02
• Subjects: Ͽ density -- μ viscosity -- A cross-sectional area -- ANOVA analysis of variance -- CD drag coefficient -- CNC cellulose nanocrystal -- d droplet diameter -- FD drag force -- Fe iron -- FeCl2.4H2O iron (II) chloride tetrahydrate -- FeCl3.6H2O iron (III) chloride hexahydrate -- FE-SEM field emission scanning electron microscope -- MCNC Fe3O4-cellulose nanocrystal -- MNPs Fe3O4 nanoparticles -- Ms saturation magnetization -- O/W oil-in-water -- Re Reynolds number -- TGA thermogravimetric analysis -- u velocity -- VSM vibrating sample magnetometry; Pickering emulsion -- Fe3O4-CNC nanocomposite -- Palm olein -- Emulsifier -- pH responsive -- Magnetic responstive; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2016.08.091
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: ⿢ Preparation of palm olein-in-water Pickering emulsion using MCNC. ⿢ The zeta potential of MCNC is greatly influenced by Fe3 O4 nanoparticles. ⿢ MCNC-stabilized Pickering emulsions possessed both pH and magnetic responsiveness. ⿢ The resultant emulsions showed excellent colloidal stability upon storage. Abstract: We studied the formation of palm olein-in-water (O/W) Pickering emulsion stabilized by Fe3 O4 -cellulose nanocrystals (MCNC) nanocomposites obtained by ultrasound assisted in-situ co-precipitation method. The synthesized MCNC nanocomposites successfully stabilized Pickering emulsion with dual responses. The magnetic tests revealed a direct-relation between attractability of MCNC-stabilized Pickering emulsions and the emulsion droplet diameter. The Pickering emulsions were stable under pH ranging from 3 to 6. The stability substantially reduced around pH 8⿿10, and regained slowly when approaching pH 13. From microscopic and mastersizer analysis, monodisperse emulsion droplets were noticed at pH 3⿿6, and 13, while polydisperse emulsion were obtained at pH 8⿿12. The Pickering emulsions prepared at pH 6 are stable up to 14 days, while Pickering emulsions at pH 8 experienced coalescence. In this study, the dual stimuli-responsive Pickering emulsion stabilized by MCNC may hold potentials for biomedical and drug delivery as new generation of smart nanotherapeutic carrier.