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Preparation of magnetic nanocomposite with modified polyguanidine and its antibacterial properties
Author(s) -
Lan Pham Thi,
Mai Phan Thi Tuyet,
Minh Vu Xuan,
Hanh Le Thi My,
Van Bien Tran,
Thao Do Thi,
Dung Nguyen Tuan
Publication year - 2020
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.2019000157
Subject(s) - nanocomposite , epichlorohydrin , materials science , solubility , chemical engineering , particle size , viscosity , antibacterial activity , nuclear chemistry , antimicrobial , polymer , chemistry , nanotechnology , composite material , organic chemistry , bacteria , engineering , biology , genetics
Guanidine‐based polymers are well‐known strong antimicrobial agents against a wide range of microorganisms. However, the high water solubility restricted their potential applications in the field of water treatment. In this study, polyguanidine (PG) has been modified with epichlorohydrin (Ep) and then used for synthesis of nanocomposite with Fe 3 O 4 nanoparticles. The intrinsic viscosity measurements of modified product showed clearly that the viscosity increased with the increasing of Ep content. The characterization results indicated that magnetite Fe 3 O 4 /PG‐Ep nanocomposites were successfully synthesized, with 20‐30 nm particle size and high saturation magnetization, 62 emu.g ‐1 . The TGA results showed that PG‐Ep amount containing in the nanocomposite was about 10 % (wt.). As‐prepared nanocomposite Fe 3 O 4 /PG‐Ep demonstrated good antibacterial activity against Escherichia coli and had the potential to be used in disinfection applications.