Dab tsi yog Silicon Dioxide hauv Nroj ?
Thaum silicon khi nrog cov pa oxygen, nws tsim ib lub paj hlwb hu ua silicon dioxide (SiO2) . Lwm lub npe rau silicon dioxide yog silica, uas muaj xws li nws ntau cov ntaub ntawv, ob qho tib si ntuj thiab hluavtaws. Silica muaj peb sab categorizations: crystalline, amorphous thiab hluavtaws amorphous. Cov feem ntau ntawm cov crystalline silica yog hu ua quartz, uas pom muaj nyob rau hauv cov pob zeb thiab xuab zeb uas ua li 90 feem pua ntawm lub ntiaj teb ua kaub puab. Silicone, los sis silicon dioxide, pom muaj ntau hom hauv peb cheeb tsam, raws li nws muaj kev ywj pheej. Nws muaj nyob hauv lub ntiaj teb, hauv peb cov nqaij thiab peb cov zaub mov.
Cov Tshuaj Silicon Dioxide Siv Li Cas?
Silica nanoparticles yog siv los ntawm ntau cov lag luam nrog rau cov tshuaj, cov khoom lag luam thiab cov zaub mov lag luam. Feem ntau cov khoom siv silica yog tsim los ntawm crushing los yog milling nws los ntawm natural sources. Nyob ntawm nws daim ntawv, amorphous silica muaj ntau yam ntawm cov khoom siv physicochemical. Ib yam li nws tshwm nyob rau hauv ntau cov ntaub ntawv, nws muaj ntau yam kev siv thiab tuaj yeem pom hauv ntau cov khoom. Nws pom nyob rau hauv cov zaub mov yuav yog vim ntau yam. Amorphous silica yog siv los ua ib tus neeg ua kom rov ua dua, vim silica absorbs cov dej ntau dhau lawm thiab tiv thaiv cov khoom xyaw ua ke thaum cov tshuaj muaj cov dej noo los yog cov av qis tsis cuam tshuam nrog cov khoom xyaw dhia. Nws kuj tseem siv tau ua zaub mov ua khoom noj ua ke uas yog cov cab thiab cov ntxhiab tsw. Silicon dioxide thiab silica gel yog siv tshuaj tua kab, yog li tej zaum nws yuav pom nyob rau hauv cov zaub mov vim raug cov qoob loo, khoom noj khoom noj thiab npaj zaub mov.
Cov Khoom Uas Muaj Dab Tsi Silicon Dioxide?
Ntau yam khoom muaj silicon dioxide vim nws siv nyob rau ntau lub lag luam. Cov tshuaj siv (silicon dioxide) tuaj yeem pom muaj nyob rau hauv (lwm qhov chaw tsis zoo) xws li: • Tshuaj (xws li alprazolam los ntawm Actavis, oxycodone hydrochloride los ntawm Actavis thiab Xanax los ntawm Pfizer) • Cov tshuaj siv (xws li cov ntxhuav ntxhuav thiab muaj lwm cov khoom xyaw) ntawm cov tshuaj) • Cov tshuab luam yeeb toners • Vaub luaj • Plastics • Tshuaj pleev ib ce nrog tshuaj txhuam hniav • Tshuaj tua kab • Tshuaj lom neeg • Kev siv tshuaj lom • Cov tshuaj ntxuav nrog rau cov hmoov txhuam thiab cov hlau
Cov kev txaus ntshai muaj feem xyuam nrog silicon dioxide sib txawv thiab yog nyob ntawm seb muaj ntau yam, tshwj xeeb tshaj yog cov kua silica. Lwm yam tseem ceeb muaj xws li kev loj, xws li qhov loj me, thaj tsam npoo av, txheej xim, muaj pes tsawg tus neeg, concentration thiab duration ntawm raug. Ib qho ntawm cov kev txhawj xeeb txog silica nanoparticles yog tias lawv muaj peev xwm tso tau cov ntshav siab thaiv, uas feem ntau ua teeb meem tshuaj tawm mus rau hauv lub hlwb. Cov neeg feem ntau yuav kis tau cov mob tshwm sim tuaj yeem nrog cov kab mob silicon dioxide yog cov neeg ua hauj lwm kev lag luam hauv cheeb tsam uas ua pa ntawm cov hmoov av uas muaj ntau plua plav crystalline, tshwj xeeb tshaj yog cov ntaub ntawv quartz thiab cristobalite, vim cov no tau pom cov kab carcinogenic. Txawm hais tias lub mechanisms ntawm no toxicity tsis meej, muaj ib lub cev loj ntawm kev ua hauj lwm uas qhia qhov kev sib raug zoo no. Crystalline silicon yog txuam nrog silicosis, uas yog ib yam kab mob ntsws los ntawm kev nqus cov kua roj me me ntawm silica ntau lub sijhawm. Silicone raug kuj tau txuam nrog mob rheumatoid, mob plab hlab vasculitis, autoimmune kab mob thiab lub raum puas tsuaj, tab sis muaj kev tsis sib haum xeeb txog kev mob raum. Ib txoj kev tshawb nrhiav luam tawm 2012 nyob hauv phau ntawv xov xwm "Renal Failure" tau pom tias muaj kev sib raug zoo thiab zoo sib xws ntawm kev sib raug zoo thiab mob raum (CKD). Qhov kev tshawb nrhiav no tau pom hais tias kev raug mob ntawm silica yog cuam tshuam nrog txog feem peb ntawm kev pheej hmoo siab hauv CKD, thiab thaum lub sij hawm kis tau tus kab mob nce ntxiv, yog li qhov nce ntawm qhov kev pheej hmoo rau CKD. Teb Chaws Asmeskas Environmental Protection Agency muab tso rau silicon dioxide hauv Toxicity Category III, uas yog tus thib ob qis tshaj plaws ntawm qhov ntsuas qhov lom. Silicon dioxide thiab silicates tau muaj keeb kwm siv nyob rau hauv cov zaub mov tsis muaj teebmeem. Txawm tias muaj ntau cov ntawv tshaj tawm thiab kev tshawb fawb, muaj kev tsis sib haum xeeb thiab kev tawm tsam sib txawv ntawm silicon dioxide txoj kev nyab xeeb. Qhov no yuav yog vim muaj qhov tseeb tias nws tshwm nyob rau hauv ntau yam versions thiab feem ntau ntawm cov kev tshawb fawb tau ua nyob rau ntawm cov ntaub ntawv crystalline thiab nyuam qhuav nyuam qhuav pib ntawm cov ntaub ntawv amorphous. Muaj tsis muaj pov thawj txaus tseem tsis tau xaus rau qhov hais tias amorphous silica yog correlated nrog cov kev txaus ntshai uas crystalline silica tshwm muaj. Raws li Food and Drug Administration, silicon dioxide thiab silica gel raws li cov khoom noj khoom haus feem ntau pom tau tias muaj kev nyab xeeb (GRAS), txhais tau tias tus neeg siv nruab nrab yuav tsuas pub me me nyiaj tsawg tsis muaj teebmeem tshwm sim. Cov Kev Phom Sij Noj Qab Haus Huv raug Associated Nrog Silicon Dioxide?
Puas yog Silicon Dioxide Safe?