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Synthesis, Surface Properties, and Antibacterial Activity of Novel Ester‐Containing Cationic Silicone Surfactants and Their Utilization as Fabric‐Finishing Agents
Author(s) -
Wei Yuan,
Zheng Cheng,
Zhang Zhenqiang,
Zeng Zhaowen,
Mao Taoyan,
Long Shikang,
Ling Hui
Publication year - 2019
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1002/jsde.12211
Subject(s) - cationic polymerization , chemistry , thermogravimetric analysis , pulmonary surfactant , antibacterial activity , dynamic light scattering , fourier transform infrared spectroscopy , silicone , adsorption , surface tension , alkyl , aqueous solution , critical micelle concentration , scanning electron microscope , transmission electron microscopy , polymer chemistry , chemical engineering , nuclear chemistry , organic chemistry , micelle , nanoparticle , materials science , composite material , biochemistry , biology , bacteria , engineering , genetics , physics , quantum mechanics
In this study, a series of cationic silicone surfactants SiQC n Cl containing ester groups and double long‐chain alkyls ( n = 9, 11, 13, 15, and 17) were synthesized by microwave irradiation and characterized using infrared Fourier transform (FTIR), 1 H nuclear magnetic resonance ( 1 H NMR), and thermogravimetric analysis (TGA). Surface activity and adsorption of these surfactants were investigated by measuring the equilibrium surface tension. The critical micelle concentration (CMC) decreased with increasing alkyl length of SiQC n Cl at 25 °C and so did the corresponding surface tension at the CMC ( γ CMC ). The aggregation behavior in aqueous solutions was also investigated systemically through transmission electron microscopy (TEM) and dynamic light scattering (DLS). Spherical or ellipsoidal‐like aggregates with diameters ranging from 300 to 900 nm were observed. It is also shown that the cationic silicone surfactants exhibit certain antibacterial properties against Staphylococcus aureus but slightly poor to Escherichia coli . The morphological structure of SiQC 15 Cl‐treated cotton fabrics was observed using scanning electron microscopy (SEM), which showed that the surface became neat and smooth. What is more, the finished cotton fabrics maintained some antibacterial properties with improved softness, which may provide a more comfortable and healthy lifestyle. This work may also be helpful to the design and application of functional cationic silicone surfactants.