Immobilization of quaternary ammonium salts on grafting particle polystyrene/SiO2 and preliminary study of application performance

Synthesis of pyridinium polysiloxane for antibacterial coating in supercritical carbon dioxide

“…Samples were then rinsed with distilled water three times and dried at ambient temperature after washing. The dried samples were subsequently titrated to calculate the areal density of pyridinium group by measuring the bromine content using Volhard titration method …”

“…The dried samples were subsequently titrated to calculate the areal density of pyridinium group by measuring the bromine content using Volhard titration method. 42 Instrumentation X-ray photoelectron spectroscopy (XPS) spectra were recorded with a Thermo Scientific Escalab 250Xi spectrometer. The working pressure of the spectrometer was maintained below 1 3 10 26 Pa and a low energy electron flood gun was used to neutralize surface charging.…”

Adsorption performance and mechanism of 2,4,6-trinitrotoluene on a novel adsorption material polyvinylbenzyl acid/SiO2

“…[13], grafted particles CMPVB/SiO 2 were prepared as follows: (1) the silica gel particles activated with methane sulfonic acid were first allowed to react with coupling agent MPS, which contains a molecule polymerisable bond (double bond), and the surface-modified particles MPS-SiO 2 were obtained; (2) vinylbenzene was graftpolymerized onto MPS-SiO 2 particles with azoisobutyric dinitrile as initiator in a solution polymerization system (with toluene as solvent) under N 2 atmosphere at 80 8C for 7 h, and the grafted particles PVB/SiO 2 were obtained. The grafting degree (g g À1 ) was measured with thermogravimetric analyzer and chemical structure was characterized with infrared spectroscopy; (3) the grafted PVB macromolecules on PVB/SiO 2 particles were chloromethylated using BCMB as chloromethylation reagent with catalytic action of Lewis acid (SnCl 4 ), and the grafted particles CMPVB/SiO 2 were prepared.…”

Highly antibacterial and toughened polystyrene composites with silver nanoparticles modified tetrapod‐like zinc oxide whiskers

“…On the basis of the aforementioned considerations, PS becomes increasingly less appealing for refrigeration trays manufactures, and a mechanically stronger replacement for PS with antibacterial property is thus needed. Several researches have been done to either toughen PS, or incorporate antibacterial property to PS, while very few researches have managed to incorporate both properties by adding one type of filler particles. Wang et al and Zhang et al used TiO 2 as toughening and antibacterial agent and both of them found that the maximum of impact strength and antibacterial activity appeared with the addition of 1.0 wt % TiO 2 .…”