Fumed silica yog silica-based polymer nrog ib tug nyiam ntawm absorbing ya raws. Nws yog siv rau hauv cov cuab yeej siv high technology los yog raws li muaj cov khoom xim, coatings, electronics thiab optical fibers industries.
Muaj ntau ntau yam ntawm cov khoom no, uas tau txhais los ntawm lawv cov qauv teeb meem loj. Nws yog siv los muab cov khoom thixotropic hauv coatings thiab adhesives. Nws kuj pabcuam kom muaj kev khiav haujlwm hauv kev lag luam, xws li cov tshuaj pleev ib ce thiab cov chaw muag tshuaj.
Hydrophilic fumed silica, lub teeb dawb hmoov, yog coj los ntawm cov tshuaj tiv thaiv ntawm cov hluav taws xob oxyhydrogen thiab cov tshuaj chlorosilanes (Silicon tetrachloride) ua rau lub cev muaj ntsev ntawm silicon dioxide (thiab hydrogen chloride). Tus qauv ntawm qhov khoom yog nyob ntawm qhov chaw ntawm daim ntawv thov thiab kev ua lag luam. Cov kev hloov ntawm qhov ntau ntawm cov cheeb tsam no yog qhov ua rau cov qib kawm.
Qhov dej hydrophilic ntawm fumed silica yog qhov tshwm sim ntawm kev txuas ntawm hydroxyl pawg mus rau atomic silica nyob rau ntawm qhov chaw ntawm lub particle; qhov khoom yog tam sim no muaj peev xwm ntawm hydrogen tsevneeg- qhov no ua rau nws dispersible hauv dej. Qhov no ua rau cov khoom ruaj khov nyob rau hauv chav tsev sov, yog li nce lub txee lub neej ib zaug qhib.
Los ntawm reacting hydrophilic fumed silica nrog reactive silanes, hydrophobic silica yuav ua tau. Qhov sib ntxiv ntawm cov khoom no nyob rau hauv adhesives thiab coatings nce lub zog zog nplaum quab yuam ntawm substrate.