NDLI: Quaternary Ammonium Salts (QAS) Modified Polysiloxane Biocide Supported on Silica Materials

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Quaternary Ammonium Salts (QAS) Modified Polysiloxane Biocide Supported on Silica Materials

Content Provider	Springer Nature Link
Author	Rózga Wijas, K. Mizerska, U. Fortuniak, W. Chojwski, J. Hałasa, R. Werel, W.
Copyright Year	2007
Abstract	Three types of silica particles modified with vinyl groups were obtained: (i) xerogel formed by hydrolytic polycondensation of the mixture of tetramethoxysilane (TMOS) and 1,1,1,7−tetramethoxy-3,5,7-trimethyl-3,5,7-trivinyltetrasiloxane, (ii) mesoporous silica obtained from the same precursors in the presence of the cetyltrimethylammonium bromide (CTAB), and (iii) commercial Fluka silica gel 60A with a vinyltriethoxysilane-treated surface. Vinyl groups on these silica materials were transformed into silyl chloride by hydrosilylation with HMe$_{2}$SiCl. These groups were used to graft living polysiloxane that was synthesized by anionic ring-opening polymerization of 2,4,6-tri(3-chloropropyl)-2,4,6-trimethylcyclotrisiloxane and initiated by BuLi. Chloropropyl groups on the grafted polymer were used to quaternize N,N-dimethyl-n-octylamine. Silica particles with grafted polysiloxane having quaternary ammonium salt (QAS) groups pendant to polymer chains were obtained. Silica material with QAS groups directly attached to the surface were generated by the action of N,N-dimethyl-n-octylamine on particles obtained by the sol–gel process involving tetraethoxysilane (TEOS) with 3-chloropropyltriethoxysilane. The bacteriocidal properties of all these materials were tested in water suspension against five representative strains for Gram-positive and Gram-negative bacteria. Some of the silica–polysiloxane hybrid materials have good antibacterial properties against Gram-positive strains, but not as good as the non-tethered QAS-substituted polysiloxane in water solution. The QAS groups that are directly bonded to the silica material surface are inactive.
Starting Page	605
Ending Page	613
Page Count	9
File Format	PDF
ISSN	15741443
Journal	Journal of Inorganic and Organometallic Polymers and Materials
Volume Number	17
Issue Number	4
e-ISSN	15741451
Language	English
Publisher	Springer US
Publisher Date	2007-07-03
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Silica hybrids Sol–gel silica Silica materials Functionalized polysiloxanes Biocidal polymers QAS Biocides Functionalized silica Polymer Sciences Organic Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Polymers and Plastics

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