Polyvinylpyrrolidone (PVP) yog dab tsi?
Polyvinylpyrrolidone, abbreviated li PVP. Polyvinylpyrrolidone (PVP) yog ib qho uas tsis yog-ionic polymer compound tsim los ntawm polymerization ntawm N-vinylpyrrolidone (NVP) nyob rau hauv tej yam kev mob. Nws yog siv los ua ib qho adjuvant, additive, thiab excipient hauv ntau qhov chaw xws li tshuaj, textile, tshuaj, dej haus, thiab tshuaj txhua hnub. Raws li cov khoom xav tau, PVP tuaj yeem muab faib ua plaub hom: qib kev lag luam, qib tshuaj pleev ib ce, qib zaub mov, thiab qib tshuaj. Homopolymers, copolymer, thiab cross-linked polymer series cov khoom lag luam nrog cov txheeb ze molecular hnyav xws li ntau txhiab mus rau ntau tshaj ib lab tau siv dav vim lawv cov khoom zoo heev thiab tshwj xeeb.
PVP muab faib ua plaub theem raws li nws qhov hnyav molecular, thiab feem ntau sawv cev los ntawm K qhov tseem ceeb. Qhov sib txawv K qhov tseem ceeb sawv cev rau qhov sib thooj ntawm qhov nruab nrab molecular hnyav ntawm PVP. Tus nqi K yog qhov tseeb tus yam ntxwv muaj feem xyuam nrog cov txheeb ze viscosity ntawm PVP aqueous tov, thiab viscosity yog lub cev muaj nuj nqis ntsig txog qhov hnyav molecular ntawm polymers. Yog li ntawd, tus nqi K tuaj yeem siv los qhia qhov nruab nrab molecular hnyav ntawm PVP. Feem ntau, qhov loj dua tus nqi K, qhov siab dua nws cov viscosity thiab muaj zog nws adhesion. Cov khoom tseem ceeb ntau yam thiab cov lus qhia tshwj xeeb ntawm PVP tuaj yeem muab faib ua viscosity theem ntawm K-15, K17, K25, K-30, K60, thiab K-90 raws li qhov hnyav molecular.
UNILONG INDUSTRY tuaj yeem muab cov hauv qab noPVP-Kseries khoom:
| HOM | PVP K12 | PVP K15 | PVP K17 | PVP K25 | PVP K30 | PVP K60 | PEB K90 | |
| Qhov tshwm sim | Dawb hmoov | |||||||
| K Tus nqi | 10.2-13.8 Nws | 12.75-17.25 dr hab | 15.3-18.36 Nws | 22.5-27.0 Nws | 27-32.4 Nws | 54-64.8 | 81-97.2 ib | |
| NVP Singel impurity (Impurity A) | (CP2005/USP26) % max | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| (USP31/EP6/BP2007) ppm max | 10 | 10 | 10 | 10 | 10 | 10 | 10 | |
| Dej % max | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | |
| Cov ntsiab lus % min | 95 | 95 | 95 | 95 | 95 | 95 | 95 | |
| pH (5% aqueous tov) | 3.0-5.0 Nws | 3.0-5.0 Nws | 3.0-5.0 Nws | 3.0-5.0 Nws | 3.0-5.0 Nws | 4.0-7.0 Nws | 4.0-7.0 Nws | |
| Sulfate ash% max | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | |
| Nitrogen cov ntsiab lus ﹪ | 11.5-12.8 Nws | 11.5-12.8 Nws | 11.5-12.8 Nws | 11.5-12.8 Nws | 11.5-12.8 Nws | 11.5-12.8 Nws | 11.5-12.8 Nws | |
| 2-P cov ntsiab lus % max | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | |
| Aldehyde ppm max | 500 | 500 | 500 | 500 | 500 | 500 | 500 | |
| Heavy hlau ppm max | 10 | 10 | 10 | 10 | 10 | 10 | 10 | |
| Hydrazine ppm max | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| Hydrogen peroxide ppm max | 400 | 400 | 400 | 400 | 400 | 400 | 400 | |
PVPRaws li cov khoom siv hluavtaws hluavtaws, muaj cov khoom siv dav dav ntawm cov dej-soluble polymer tebchaw, suav nrog kev tiv thaiv colloid, zaj duab xis-tsim, kev sib txuas, kev nqus dej, solubilization lossis coagulation. Txawm li cas los xij, nws qhov tshwj xeeb tshaj plaws yog nws cov solubility zoo heev thiab kev sib raug zoo ntawm lub cev, uas tau nyiam mloog. Nyob rau hauv hluavtaws polymers, PVP, uas yog soluble nyob rau hauv ob qho tib si dej thiab feem ntau cov organic solvents, muaj tsawg toxicity, thiab zoo physiological compatibility, yog tsis pom zoo, tshwj xeeb tshaj yog nyob rau hauv cov teb ze ze rau tib neeg noj qab haus huv xws li tshuaj, zaub mov, thiab tshuaj pleev ib ce. Cov hauv qab no yog ib qho kev qhia tshwj xeeb rau nws qhov chaw thov:
Hauv kev lag luam niaj hnub tshuaj pleev ib ce
Hauv cov tshuaj pleev ib ce niaj hnub, PVP thiab copolymer muaj qhov sib txawv zoo thiab cov cuab yeej ua yeeb yaj kiab. PVP tuaj yeem tiv thaiv colloid hauv cov tshuaj pleev ib ce, thiab tuaj yeem siv rau hauv cov roj thiab cov tshuaj tsis muaj roj, xws li teeb cov kua, tshuaj tsuag plaub hau thiab mousse chaw tus neeg saib xyuas, tshuaj pleev thaiv hnub plaub hau, tshuaj zawv plaub hau ua npuas ncauj, yoj tus neeg sawv cev, thiab cov plaub hau zas dispersant thiab affinity agent. Ntxiv PVP rau daus cream, tshuaj pleev thaiv hnub, thiab cov tshuaj tshem tawm cov plaub hau tuaj yeem txhim kho qhov ntub dej thiab lubrication.
Ntxuav teb
PVP muaj cov khoom tiv thaiv fouling thiab rov los nag thiab tuaj yeem siv los npaj cov kua pob tshab lossis cov tshuaj detergents hnyav. Ntxiv PVP rau cov tshuaj detergents muaj cov nyhuv zoo los tiv thaiv cov xim thiab tuaj yeem txhim kho kev tu lub peev xwm. Thaum ntxuav cov ntaub, nws tuaj yeem tiv thaiv cov khoom siv hluavtaws los ntawm kev khaus ntawm daim tawv nqaij, tshwj xeeb tshaj yog cov hluavtaws fibers. Qhov kev ua tau zoo no yog qhov zoo tshaj li carboxymethyl cellulose (CMC) detergents. PVP tuaj yeem sib xyaw nrog borax ua cov khoom muaj txiaj ntsig zoo hauv kev tsim cov tshuaj tua kab mob phenolic. Cov tshuaj ntxuav tes uas muaj PVP thiab hydrogen peroxide muaj lub luag haujlwm ntawm cov tshuaj dawb thiab tua cov kab mob.
Textile printing thiab dyeing
PVP muaj kev sib raug zoo nrog ntau cov organic dyes thiab tuaj yeem ua ke nrog hydrophobic hluavtaws fibers xws li polyacrylonitrile, esters, nylon, thiab fiber ntau cov ntaub ntawv los txhim kho lub zog dyeing thiab hydrophilicity. Tom qab PVP thiab nylon grafting copolymerization, cov ntaub tsim tau txhim kho nws cov dej tsis kam thiab ya raws.
Coatings thiab pigments
Cov xim thiab cov xim coated nrog PVP yog pob tshab yam tsis cuam tshuam rau lawv cov xim ntuj, txhim kho gloss thiab dispersibility ntawm coatings thiab pigments, txhim kho thermal stability, thiab txhim kho dispersibility ntawm inks thiab inks.
Kev kho mob teb
PVP muaj qhov zoo ntawm lub cev tsis muaj zog, tsis koom nrog tib neeg cov metabolism, thiab muaj biocompatibility zoo heev, uas tsis ua rau muaj kev ua xua rau ntawm daim tawv nqaij, mucosa, ob lub qhov muag, thiab lwm yam. tuaj yeem siv los ua cov ntawv khi rau cov ntsiav tshuaj thiab granules, co hnyav rau kev txhaj tshuaj, thiab kev pabcuam txaus rau cov tshuaj ntsiav; Detoxifiers, extenders, lubricants thiab film-forming agents rau qhov muag tee, dispersants rau kua formulations, stabilizers rau enzymes thiab thermosensitive tshuaj, thiab kuj yuav siv tau raws li low-temperature preservatives. Siv rau cov lo ntsiab muag kom lawv cov hydrophilicity thiab lubrication. Tsis tas li ntawd, PVP kuj tuaj yeem siv los ua cov xim pleev xim thiab X-ray sib piv tus neeg sawv cev; Nws tuaj yeem siv rau ntau hom kev siv tshuaj xws li ntsiav tshuaj, granules, thiab dej. Nws muaj detoxification, hemostasis, muaj zog dissolution concentration, tiv thaiv peritoneal adhesion, thiab txhawb erythrocyte sedimentation tus nqi. PVP K30 tau raug tso tawm los ntawm kev pom zoo los ntawm lub tuam tsev kws tshuaj hauv tebchaws.
Kev ua zaub mov
PVP nws tus kheej tsis yog carcinogenic thiab muaj zaub mov zoo. Nws tuaj yeem tsim cov complexes nrog cov tshuaj polyphenolic tshwj xeeb (xws li tannins) thiab feem ntau yog siv los ua kom pom tseeb thiab ruaj khov hauv kev ua zaub mov, xws li npias, kua txiv hmab txiv ntoo, thiab cawv. PVP tuaj yeem tsim cov complexes nrog cov tshuaj polyphenolic tshwj xeeb (xws li tannins), uas ua lub luag haujlwm kom paub meej thiab tiv thaiv coagulant hauv cov kua txiv hmab txiv ntoo. Daim ntawv thov kev sib txuas ntawm PVP hauv npias thiab tshuaj yej haus yog qhov tshwj xeeb tshaj plaws. Cov tshuaj polyphenolic hauv npias tuaj yeem khi nrog cov proteins hauv npias los tsim cov tannin macromolecular complexes, uas cuam tshuam rau qhov tsw ntawm npias thiab ua rau nws lub neej ntev. Crosslinked polyvinylpyrrolidone (PVPP) tuaj yeem chelate nrog tannic acid thiab anthocyanins hauv npias, yog li qhia meej rau npias, txhim kho nws qhov ruaj khov, thiab txuas ntxiv nws lub txee lub neej. Hauv cov dej haus tshuaj yej, kev siv PVPP tuaj yeem tsim nyog txo cov ntsiab lus ntawm cov tshuaj yej polyphenols, thiab PVPP tsis nyob hauv cov dej haus tshuaj yej, ua rau nws rov siv tau thiab txo cov nqi.
Cov cheeb tsam tseem ceeb ntawm PVP tam sim no yog tsom rau hauv kev lag luam tshuaj thiab tshuaj niaj hnub, thiab kev loj hlob ntawm ob qhov kev lag luam no tseem yuav ua rau cov kev xav tau tseem ceeb rau PVP noj yav tom ntej. Nyob rau hauv qhov tshwm sim ntawm PVP, nyob rau hauv lub lithium roj teeb kev lag luam, PVP yuav siv tau raws li ib tug dispersant rau lithium roj teeb electrodes thiab ib tug kev pab rau cov ntaub ntawv conductive; Hauv kev lag luam photovoltaic, PVP tuaj yeem siv los ua cov khoom tawg los tsim cov hmoov zoo zoo nkauj zoo nkauj rau cov khoom siv hluav taws xob zoo, cov ntawv zoo li cov hmoov nyiaj rau cov khoom tsis zoo electrode silver paste, thiab nano silver particles. Nrog kev txhim kho txuas ntxiv ntawm lithium roj teeb nkag mus thiab qhov nce ntawm photovoltaic ntsia muaj peev xwm, ob qhov kev tawm tshiab no yuav ua rau muaj kev xav tau rau PVP.
Unilong yog tus kws tshaj lij kev muag khoom, thiab covPVP seriestau tsim thiab tsim rau kaum xyoo. Nrog rau kev hloov pauv hauv kev ua lag luam, cov khoom lag luam ntawm PVP cov khoom tsis txaus. Tam sim no, peb tau ntxiv ob txoj kab ntau lawm, nrog rau cov khoom txaus thiab cov nqi zoo. Thov koj xav nug.
Post lub sij hawm: Dec-01-2023