Nyob rau hauv daim teb ntawm cov ntaub ntawv kev tshawb fawb thiab tshuaj txuj ci engineering, poly vinylprolidone (PVP rau luv luv) yog dav siv dej-soluble polymer compound. Nrog nws cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb, nws nyob hauv txoj haujlwm tseem ceeb hauv ntau yam kev lag luam xws li tshuaj, tshuaj pleev ib ce, thiab khoom noj. Txawm li cas los xij, muaj kev sib tham rhuab hauv kev lag luam tsis ntev no los ntawm seb PVP yuav decompose nyob rau hauv cov chaw kub. Qhov teeb meem no tsis yog tsuas cuam tshuam nrog qhov muaj qhov ruaj khov ntawm cov khoom lag luam, tab sis kuj cuam tshuam nrog kev nthuav dav kub thiab cov kws tshawb fawb tshwj xeeb, uas tau nyiam zoo los ntawm ntau cov tuam txhab thiab cov kws tshawb nrhiav.
Cov txheej txheem
Txheeb xyuas cov khoom tseem ceeb ntawm pvp
Kev lag luam cov xwm txheej ntawm kev cuam tshuam ntawm cov kub ntawm PvP
(I) Tswv yim los ntawm kev thov kev lag luam
(II) kev kawm tau ntawm cov chaw tshawb fawb
Kev tsom xam ntawm cov ua rau muaj kev kub siab ntxhov siab ntawm pvp
(I) theem molecular theem
(II) Cov tshuaj tiv thaiv kab ke tau yooj yim
Cov tswv yim rau kev cuam tshuam nrog kub decomposition ntawm pvp
(Kuv) tus txheej txheem ua kom zoo
(II) kev hloov kho cov khoom
Cov tswvyim kev tshawb nrhiav thiab kev lag luam Outlook
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Txheeb xyuas cov khoom tseem ceeb ntawm pvp
PVP yog ua los ntawm N-Vinylprolidone Monomers los ntawm kev dawb radical polymerization. Cov pab pawg Lactam thiab Vinyl sab saw hauv nws cov qauv molecular muab nws ua solubility zoo, ua yeeb yaj kiab ua yeeb yam, muaj peev xwm ua tau zoo thiab muaj peev xwm. Nyob rau hauv ib txwm muaj mob, pvp feem ntau yog dawb lossis ze li ntawm cov hmoov dawb lossis tsis txaus ntseeg thiab muaj peev xwm yaj, thiab muaj zog yaj, thiab muaj ntau yam ethanol thiab chloroform. Thaum lub sij hawm ua kom qhuav, nws tuaj yeem tsim kev txuas ntxiv, hloov pauv tau, zaj duab xis pob tshab nrog qee yam khoom siv hluav taws xob muaj zog thiab cov nplaum ntawm cov khoom. Nws cov tshuaj chemical yog qhov ruaj khov, thiab nws feem ntau tsis yooj yim los ua kom hnov mob nrog cov kua qaub thiab alkalis ntawm chav tsev kub.
Kev lag luam cov xwm txheej ntawm kev cuam tshuam ntawm cov kub ntawm PvP
1. Tswv yim los ntawm daim ntawv thov kev lag luam
Kws Kev Lag Luam: Qee cov tuam txhab kws tshuaj tau tshaj tawm tias yog tias PVP yog siv los ua kev zam ntawm cov tshuaj ntau lawm thiab kom tsis muaj menyuam thaum muaj qee yam tshuaj, cov khoom lag luam tsis muaj qee zaus. Piv txwv li, ib ntsiav tshuaj yeeb nrog pvp raws li cov nplaum uas qhia tau cov nplaum thiab ua kom tsis muaj menyuam yaus tom qab ua kom muaj zog ntawm 120 degree. Qee qhov kev tshawb fawb tau xav tias qhov no yuav cuam tshuam nrog cov kev hloov pauv ntawm pvp ntawm qhov kub no. Txawm hais tias muaj tsis muaj pov thawj hais tias nws yog tshwm sim los ntawm kev rhuav tshem ntawm PvP, nws tau ua rau cov chaw muag tshuaj yuav tsum ceev faj txog kev nyab xeeb ntawm kev siv PVP hauv cov txheej txheem kub-kub.
Kev Lag Luam Kev Lag Luam: Hauv cov txheej txheem ntau lawm ntawm cov tshuaj pleev ib ce, qee cov txheej txheem koom nrog cua sov, xws li kev npaj cov di ncauj thiab di ncauj. Qee cov tshuaj pleev ib ce cov chaw tsim khoom tau pom tias thaum qhov kev tsim khoom ntau tshaj 100 kev kawm ntawv uas muaj pvp yuav muaj kev sib txuam me me thiab hloov pauv cov khoom lag luam. Qee hom lag luam R & D cov neeg ua haujlwm uas tsis txaus ntseeg tias qhov no yog vim tias pvp tau undergone muaj qee qhov kev cuam tshuam ntawm kev cuam tshuam ntawm kev cuam tshuam ntau, uas nyeg cuam tshuam rau cov tsos thiab kev ua tau zoo ntawm cov khoom.
Kev lag luam khoom noj khoom haus: nyob rau hauv qhov kev kub siab thiab kub-kub convenation cov txheej txheem ntawm cov zaub mov noj, qhov ruaj ntseg ntawm pvp ua zaub mov ntxiv kuj tseem kuaj. Qee cov tuam txhab qhia tias thaum lub sij hawm cov kua txiv hmab txiv ntoo siab (qhov kub thiab nag lossis nag lossis daus
2. Kev Tshawb Fawb Kev Npaj
Ntau lub koom haum tshawb fawb tau tshawb fawb txog kev ruaj ntseg ntawm PVP hauv qhov chaw kub. Tsis ntev los no, cov ntaub ntawv tshawb nrhiav tshuaj muaj txiaj ntsig tau kuaj PvP siv maj mam ua kom sov (tga) Kev Ntsuam Xyuas Ntxiv Los ntawm Fourier Transform Infrared Spectroscopy (FT-ir) qhia tau tias nyob rau hauv qhov kub thiab cov lus hais tias nws yuav tau undergone ib qho kev txiav txim siab. Txawm li cas los xij, PVP nrog cov tes hnyav molecular thiab qib sib txawv thiab cov qib ntawm polymerization muaj qhov sib txawv ntawm qhov sib txawv thiab cov degrees. Feem ntau, pvp nrog qis dua molecular hnyav zoo li muaj ntau rhiab rau qhov kub thiab tuaj yeem qhia pom qhov tseeb ntawm kev rhuav tshem.
Kev tsom xam ntawm cov ua rau muaj kev kub siab ntxhov siab ntawm pvp
1. Molecular qauv qauv
Lub zog ntawm cov kev sib tw ntawm Lactam nplhaib Lactam nplhaib Lactam nplhaib ntawm lub pvp molecule hloov ntawm cov kub. Raws li qhov kub nce, molecular thermal suab qhov hluav taws xob ua kom lub ntsej muag Lactam thiab CC sib khi rau sab tes yuav tsis ruaj khov rau kev nqus tau ntau lub zog ntau dhau. Thaum lub zog tshaj li lub zog tawg ntawm kev sib raug zoo ntawm kev sib tsoo, ua rau muaj kev puas tsuaj ntawm PvP molecular qauv thiab ua rau cov kev xav tsis zoo. Piv txwv li, thaum kub, lub lactam nplhaib yuav qhib, thiab lwm sab saw yuav tawg, kev cuam tshuam, cuam tshuam nrog tus thawj molecular saw qauv ntawm pvp.
2. Cov tshuaj tiv thaiv Kinetics yam
Los ntawm cov kev pom ntawm cov tshuaj tiv thaiv kinetics, kub muab lub zog rau kev txiav txim siab ntawm pvp thiab nrawm qhov tshuaj tiv thaiv kab mob. Thaum lub caij nyoog kub nce, qhov sib tsoo zaus ntawm PvP molecules nce, thiab kev sib tw ntawm cov kev sib tsoo tau zoo, ua rau kev txiav txim siab muaj kev cuam tshuam ntau yuav tshwm sim. Tsis tas li ntawd, nyob rau hauv ib qho chaw aerobic, qhov kub siab kuj tseem yuav ua rau pvp kom yauv oxidation cov tshuaj tiv thaiv nrog pa oxygen, ntxiv cov txheej txheem decomposition. Cov kev tshawb fawb pom tau tias nyob rau hauv tib lub siab mob tshwm sim sai dua li ntawd hauv kev txhawb nqa lub luag haujlwm tseem ceeb hauv kev txhawb nqa lub siab-decomposition ntawm pvp.
Cov tswv yim rau kev cuam tshuam nrog kub decomposition ntawm pvp
1.Cov txheej txheem optimization kev txhim kho cov ntau lawm:Rau cov tuam txhab siv PVP, lub tswv yim tseem ceeb yog los ua kom zoo dua cov txheej txheem ntau li ntau tau thiab txo cov kev ua haujlwm ntawm kev sib txuas nrog PVP. Piv txwv li, hauv cov khoom siv tshuaj, qee cov kev siv hluav taws xob qis dua los kho cov khoom siv kom tsis muaj zog ntawm cov khoom siv kom tsis muaj zog, ua kom muaj zog kom muaj zog ua kom muaj zog dua li ntawm pvp
Tswjhwm lub caij sov:Ntxiv rau qhov kub thiab txias, lub sijhawm sov kuj yog qhov tseem ceeb. Hauv kev tsim cov tshuaj pleev ib ce thiab cov khoom noj, cov tuam txhab tsis txhob muaj ib puag ncig kev kub siab ntev los ntawm kev tswj lub caij sov. Piv txwv li, hauv cov txheej txheem ntawm kev ua tus mem pleev di ncauj, lub sijhawm cua sov thiab sib tov yog luv kom paub tseeb tias pvp tsis decompose ntau dhau thaum ua tiav cov txheej txheem xav tau.
2.Cov khoom hloov kho ntxiv cov ntsaws ruaj ruaj:Cov kws tshawb nrhiav sim ua kom muaj kev ruaj khov ntawm pvp los ntawm kev ntxiv stabilizers. Piv txwv li, ntxiv qee cov tshuaj antioxidants xws li vitamins E thiab Butylated P-Cresol (BHT) Hauv qee qhov kev sim, tom qab ntxiv 0. 5% {% BHT rau kev txo qis, thiab cov khoom lag luam zoo heev tau txhim kho.
Tshuaj Kho Mob Tshuaj:Kho cov qauv molecular ntawm PVP los ntawm kev hloov kho tshuaj lom neeg kuj tseem yog txoj hauv kev tseem ceeb los txhim kho nws qhov kev ruaj khov siab. Piv txwv li, kev sib tw thev naus laus zis txuas tau siv los qhia txog cov kab lis kev cai ntawm pvp molecular chains los tsim ib qho kev sib tw ntawm peb-seem. Tus ntoo khaub lig no sib txuas (xws li hla-txuas polyvinyl pyrrolidone PVPP) muaj cov qauv txheej txheem sib dhos thiab ua kom muaj kev kub ntxhov siab. Cov kev tshawb fawb tau pom tias kev ruaj ntseg ntawm PVPP ntawm 150 qib yog siab dua li ntawm pvp, thiab nws cov khoom pov thawj zoo dua li cov kev siv, khoom noj thiab lwm yam kev lag luam.
Cov tswvyim kev tshawb nrhiav thiab kev lag luam Outlook
Cov kws tshaj lij kev lag luam taw qhia hais tias txawm hais tias qhov teeb meem decomposition ntawm pvp hauv kev ntsuas kub siab, nws tseem tau muab cov kev tshawb fawb tshiab rau cov ntaub ntawv tshawb fawb. Ntawm ib sab tes, cov tuam txhab yuav tsum tau ua raws li PVP cov khoom siv kub thiab xaiv cov kev daws teeb meem raws li kev xav tau tiag tiag; Ntawm qhov tod tes, kev tshawb fawb cov chaw tshawb fawb yuav tsum ua rau lawv cov peev txheej hauv kev tshawb fawb ntawm PVP kub siab thiab tsim cov txheej txheem kho kom zoo dua thiab tsim kho cov thev naus laus zis ntau dua. Nrog rau qhov sib txawv ntawm kev tshawb fawb thiab kev nce qib ntawm PVP cov khoom siv nrog cov pa hluav taws xob ntau, xws li cov kev loj hlob kub thiab lwm yam.)
Lub decomposition ntawmPoly Vinylprolidone PvpHauv qhov kub ib puag ncig tau dhau los ua qhov tseem ceeb ntawm kev lag luam kev lag luam tam sim no. Los ntawm cov lus teb tiag tiag ntawm kev tshawb fawb txog kev tshawb fawb ntawm kev tshawb fawb, nws yog qhia tias qhov kev kub siab tau cuam tshuam rau kev ruaj ntseg ntawm pvp. Los ntawm kev txheeb xyuas cov ua rau nws cov kev txiav txim siab, peb tau pom cov tswv yim daws cov tswv yim los ntawm cov txheej txheem hloov kho cov khoom. Yav tom ntej, kev lag luam xav tau kev lag luam thiab kev tshawb fawb txog pvp hauv kev sib tw ntawm pvp kub siab, thiab ua kom muaj kev nyab xeeb ntawm kev txhim kho kev lag luam ntsig txog kev lag luam.