Synthesis of Cobalt Ferrite Nanocomposite Coated with Aluminum Oxide, Application in Protein Removal Process in Natural Rubber

Thi Thuy Vu1,2, Thi Thu Trang Le2, Ngoc Thi Dao1, Nhat Trang Nguyen1, Thi Hong Nhung Le1, Thai Huy Nguyen1, Trung Nghia Phan1,
1 School of Chemistry and Life Sciences, Hanoi University of Science and Technology, Ha Noi, Vietnam
2 Rubber Science and Technology Center, Hanoi University of Science and Technology, Ha Noi, Vietnam

Main Article Content

Abstract

Proteins in latex are the main cause of unwanted effects for users, such as skin allergies and unpleasant odors. Therefore, it is necessary to remove protein from rubber latex before putting it into production. The study presents a method and process for synthesizing CoFe2O4 (CFO) magnetic nanoparticles coated on the surface with an Al2O3 coating. Then, based on the surface adsorption mechanism of the Al2O3 coating, the protein in the latex is adsorbed and recovered from the solution by the magnetism of the CFO magnetic core. The CFO material synthesized by the co-precipitation method has an evenly distributed spherical shape, size 27.3 nm, from a saturation of 53.9 emu/g. The synthesized CFO@Al2O3 has an evenly distributed spherical shape, size 56.2 nm, from a saturation of 39.07 emu/g, and a surface area of 216.75 m2/g. The CFO@Al2O3 nanoparticles have the ability to separate proteins up to 96.71% and have been researched and proven by the Kjeldahl method.

Article Details

References

[1] J. W. Yunginger, R. T. Jones, A. F. Fransway, J. M. Kelso, M. A. Warner, and L. W. Hunt, Extractable latex allergens and proteins in disposable medical gloves and other rubber products, Journal of Allergy Clinical Immunology vol. 93, no. 5, pp. 836-842, 1994. https://doi.org/10.1016/0091-6749(94)90374-3
[2] J. D. Katz et al., Natural rubber latex allergy: Considerations for anesthesiologists, American Society of Anesthesiologists, vol. 847, 2005.
[3] C. Nakason, A. Kaesaman, and N. Yimwan, Preparation of graft copolymers from deproteinized and high ammonia concentrated natural rubber latices with methyl methacrylate, Journal of Applied Polymer Science, vol. 87, no. 1, pp. 68-75, 2003. https://doi.org/10.1002/app.11671
[4] Y. Yamamoto, P. T. Nghia, W. Klinklai, T. Saito, and S. Kawahara, Removal of proteins from natural rubber with urea and its application to continuous processes, Journal of Applied Polymer Science, vol. 107, no. 4, pp. 2329-2332, 2008. https://doi.org/10.1002/app.27236
[5] B. Issa, I. M. Obaidat, B. A. Albiss, and Y. Haik, Magnetic nanoparticles: surface effects and properties related to biomedicine applications, International journal of molecular sciences, vol. 14, no. 11, pp. 21266-21305, 2013. https://doi.org/10.3390/ijms141121266
[6] M. Trueba and S. P. Trasatti, γ‐Alumina as a support for catalysts: a review of fundamental aspects, European journal of inorganic chemistry, vol. 2005, no. 17, pp. 3393-3403, 2005. https://doi.org/10.1002/ejic.200500348
[7] M. G. Naseri, E. B. Saion, H. A. Ahangar, A. H. Shaari, and M. Hashim, Simple synthesis and characterization of cobalt ferrite nanoparticles by a thermal treatment method, Journal of Nanomaterials, vol. 2010, pp. 1-8, 2010. https://doi.org/10.1155/2010/907686
[8] N. T. Thuong, P. T. Nghia, and S. Kawahara, Removal of proteins and its effect on molecular structure and properties of natural rubber, JST: Engineering and Technology for Sustainable Development, vol. 32, no. 2, pp. 008-015, 2022. https://doi.org/10.51316/jst.157.etsd.2022.32.2.2