Preparation and characterization of magnetic Co0.5Zn0.5Fe2O4-chitosan nanoparticles as surfactants in oilfield

Chitosan nanoparticles with magnetic properties can be potentially used as separation materials in adsorption of oil for enhanced oil recovery. Different from the traditional surfactants, the novel magnetic Co0.5Zn0.5Fe2O4-chitosan nanoparticles are of excellent biodegradation and a high level of controllability. The Co0.5Zn0.5Fe2O4-chitosan nanoparticles with core-shell structure were prepared successfully. The image of transmission electron microscope and the scanning electron microscopy showed that the cubic-shape magnetic Co0.5Zn0.5Fe2O4-particles were encapsulated by the spherical chitosan nanoparticles. The size of the Co0.5Zn0.5Fe2O4-chitosan nanoparticles was below 100 nm. The saturated magnetization of the Co0.5Zn0.5Fe2O4-chitosan nanoparticles could reach 80 emu g−1 and showed the characteristics of superparamagnetism at the same time. The evaluation on the interfacial properties of the product demonstrated that the interfacial tension between crude oil and water could be reduce to ultra-low values (to about 10−3 mN m−1) when the magnetic Co0.5Zn0.5Fe2O4-chitosan nanoparticle was used in several blocks in Shengli Oilfield without other additives. Meanwhile, the magnetic Co0.5Zn0.5Fe2O4-chitosan nanoparticles possessed good salt-resisting capacity.

[1]  Ibrahim M. Banat,et al.  Microbial production of surfactants and their commercial potential. , 1997 .

[2]  J. Bacri,et al.  Some biomedical applications of ferrofluids , 1999 .

[3]  S. L. Fox,et al.  Production of surfactant from Bacillus subtilis ATCC 21332 using potato substrates , 2000 .

[4]  I. Banat,et al.  Potential commercial applications of microbial surfactants , 2000, Applied Microbiology and Biotechnology.

[5]  Ralph Weissleder,et al.  Tat peptide directs enhanced clearance and hepatic permeability of magnetic nanoparticles. , 2002, Bioconjugate chemistry.

[6]  John F. Kennedy,et al.  Metal complexation by chitosan and its derivatives: a review , 2004 .

[7]  A. Kamari,et al.  Adsorption behaviour of Fe(II) and Fe(III) ions in aqueous solution on chitosan and cross-linked chitosan beads. , 2005, Bioresource technology.

[8]  Yang-Chuang Chang,et al.  Preparation and adsorption properties of monodisperse chitosan-bound Fe3O4 magnetic nanoparticles for removal of Cu(II) ions. , 2005, Journal of colloid and interface science.

[9]  J. Contiero,et al.  Rhamnolipid Surfactants: An Update on the General Aspects of These Remarkable Biomolecules , 2005, Biotechnology progress.

[10]  A. Singh,et al.  Physiological aspects. Part 1 in a series of papers devoted to surfactants in microbiology and biotechnology. , 2006, Biotechnology advances.

[11]  Jing‐Juan Xu,et al.  Fabrication, characterization of Fe3O4 multilayer film and its application in promoting direct electron transfer of hemoglobin , 2006 .

[12]  Bing Xu,et al.  Biofunctional magnetic nanoparticles for protein separation and pathogen detection. , 2006, Chemical communications.

[13]  L. Rodrigues,et al.  Low-cost fermentative medium for biosurfactant production by probiotic bacteria , 2006 .

[14]  Ramkrishna Sen,et al.  Towards commercial production of microbial surfactants. , 2006, Trends in biotechnology.

[15]  Jia Guo,et al.  Preparation and characterization of chitosan–poly(acrylic acid) polymer magnetic microspheres , 2006 .

[16]  L. Deng,et al.  Study of the epoxydized magnetic hydroxyl particles as a carrier for immobilizing penicillin G acylase , 2007 .

[17]  Salvador Pintos,et al.  Global sensitivity analysis of Alkali–Surfactant–Polymer enhanced oil recovery processes , 2007 .

[18]  Ajay Singh,et al.  Surfactants in microbiology and biotechnology: Part 2. Application aspects. , 2007, Biotechnology advances.

[19]  R. B. Hernández,et al.  Coordination study of chitosan and Fe3 , 2008 .

[20]  C. A. Rodrigues,et al.  Adsorption of Cr(VI) using Fe-crosslinked chitosan complex (Ch-Fe). , 2010, Journal of hazardous materials.

[21]  Ibrahim M Banat,et al.  Advances in utilization of renewable substrates for biosurfactant production , 2011, AMB Express.

[22]  H. Meyer.  Sustainability and Biotechnology , 2011 .

[23]  Chensi Shen,et al.  Highly efficient detoxification of Cr(VI) by chitosan-Fe(III) complex: process and mechanism studies. , 2013, Journal of hazardous materials.