| GE Ping,AN Qiu-feng,GU Jiang-dong,LU Pan,HUANG Liang-xian.Synthesis, Morphology and Antibacterial Properties of Bactericidal Nano-hybrid Fluorosilicone Resin[J],51(8):418-426, 434 |
| Synthesis, Morphology and Antibacterial Properties of Bactericidal Nano-hybrid Fluorosilicone Resin |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.08.038 |
| KeyWord:fluorosilicon resin bactericide quaternary ammonium salt nano particle hybrid coating |
| Author | Institution |
| GE Ping |
Key Laboratory of Auxiliary Chemistry and Technology for Light Chemical Industry, Shaanxi Provincial, Shaanxi University of Science and Technology, Xi'an , China |
| AN Qiu-feng |
Key Laboratory of Auxiliary Chemistry and Technology for Light Chemical Industry, Shaanxi Provincial, Shaanxi University of Science and Technology, Xi'an , China |
| GU Jiang-dong |
Key Laboratory of Auxiliary Chemistry and Technology for Light Chemical Industry, Shaanxi Provincial, Shaanxi University of Science and Technology, Xi'an , China |
| LU Pan |
Key Laboratory of Auxiliary Chemistry and Technology for Light Chemical Industry, Shaanxi Provincial, Shaanxi University of Science and Technology, Xi'an , China |
| HUANG Liang-xian |
Key Laboratory of Auxiliary Chemistry and Technology for Light Chemical Industry, Shaanxi Provincial, Shaanxi University of Science and Technology, Xi'an , China |
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| Abstract: |
| In recent years, with the deterioration of the environment and the breeding and spread of highly pathogenic bacteria and viruses, how to inhibit bacteria and kill bacteria has become a topic of great concern. The antibacterial and bactericidal properties of silicone quaternary ammonium salt have the advantages of broad spectrum, low toxicity, high efficiency, and resistance to pH changes. After the positively charged long carbon chain quaternary ammonium group is adsorbed on the surface of negatively charged bacteria, it can be It restrains the activity of bacteria, inhibits the respiratory function of bacteria, penetrates the cell membrane and enters the bacterial cells, destroys the metabolism of intracellular enzymes and makes them die, thereby achieving the antibacterial and bactericidal effect; long-chain fluorocarbon groups can increase the water repellency of the resin. Oil repellent performance, and make it difficult for bacteria, viruses or bacteria-carrying microorganisms to adhere to the surface of the substrate after the resin treatment, and then easy to fall off and remove. Purpose to synthesize a protective material with integrated water repellent, oil repellent and antibacterial. In the presence of acid catalysis, the hydrolytic copolymerization of perfluorohexyl ethyl trimethoxysilane (FTMS) with organosilicon fungicide, (trimethoxysilpropyl)octadecyldimethyl ammonium chloride (TMSPQ) and ethyl orthosilicate (TEOS) undergoes hydrolysis and sequential copolymerization, a long chain fluoroalkyl/quaternary ammonium commodified fluorosilicone resin (QFS) with good water-repellent, oil-repellent and bactericidal properties has been prepared. The chemical structure, film morphology and performance of QFS were characterized by FT-IR, TEM, AFM, XPS and other instruments. The experiment results show that the newly synthesized QFS is a typical inorganic-organic nano hybrid resin. There are a large number of spherical and nano components in the transparent QFS system, and the average particle size is about 164.2 nm. Because of the influence of the spherical structure and the long chain fluoroalkyl group, the surface of QFS is uneven and the microstructure is relatively rough. At the same time, the mean square roughness (Ra) of the QFS film surface in the AFM scanning range of 5 μm×5 μm reaches 1.273 nm; and FESEM can see that the microscopic surface of QFS coating film is composed of micron-nano structure，When the amount of FTMS added is 25%, the water contact angle (θWCA) of the coating film can reach 145°, the minimum rolling angle is 12°, and the oil pen resistance can reach 79 times; In addition, the inhibition zone experiment indicates that QFS showed good bactericidal and antibacterial properties for staphylococcus aureus and escherichia coli. Thus, the inhibition zone of QFS reached 18.1 mm for staphylococcus aureus and 15.8 mm for escherichia coli, respectively; At the same time, QFS was synthesized by one-pot copolymerization and sequential copolymerization respectively, and finally, the sequential copolymerization method was selected from the comprehensive consideration of the water contact angle of the coating film, the thickness of the film, the average particle size and the particle size range. The coating film prepared by QFS containing low surface energy long-chain fluorocarbon groups and bactericidal quaternary ammonium groups can protect the substrate from three directions:water repellency, oil repellency and antibacterial. |
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