Polyvinylpyrrolidone yog dab tsi

Polyvinylpyrrolidone, tseem hu ua PVP, muaj tus lej CAS ntawm 9003-39-8. PVP yog cov khoom siv hluavtaws ua dej-soluble polymer compound tsim los ntawm polymerization ntawm N-vinylpyrrolidone (NVP) nyob rau hauv qee yam mob. Nyob rau tib lub sijhawm, PVP muaj qhov zoo heev solubility, tshuaj stability, zaj duab xis-tsim zog, tsis tshua muaj toxicity, physiological inertness, dej nqus thiab noo noo tuav, adhesion, thiab tiv thaiv adhesion. Nws tuaj yeem siv los ua cov khoom siv ntxiv, tus neeg sawv cev pabcuam, thiab cov khoom siv pabcuam hauv kev ua ke nrog ntau cov tshuaj inorganic thiab organic.

Polyvinylpyrrolidone (PVP) yog ib txwm siv nyob rau hauv ntau yam xws li tshuaj, tshuaj pleev ib ce, khoom noj khoom haus thiab dej haus, brewing, textiles, thiab cais membranes. Nrog rau kev tsim cov khoom siv thev naus laus zis tshiab, PVP tau siv rau hauv cov khoom siv high-tech xws li photocurable resins, optical fibers, laser discs, thiab rub cov ntaub ntawv txo. PVP ntawm cov purities sib txawv tuaj yeem muab faib ua plaub qib: qib tshuaj, qib tshuaj txhua hnub, qib zaub mov, thiab qib kev lag luam.

The main reason why PVP can be used as a coprecipitant is that the ligands in the PVP molecules can combine with the active hydrogen in the insoluble molecules, which, on the one hand, makes the relatively small molecules become amorphous and enter the PVP macromolecules. On the other hand, the hydrogen bonding does not change the water solubility of PVP, so the result is that the insoluble molecules are dispersed in the PVP macromolecules through hydrogen bonding, making it easy to dissolve. There are many types of PVP. How to choose when choosing? When the amount (mass) of PVP is the same, the increase in solubility decreases in the order of PVP K15>PVP K30>PVP K90. This is because the solubilization effect of PVP itself changes in the order of PVP K15>PVP K30>PVP K90. Feem ntau, pVp K 15 feem ntau siv.

Txog kev tsim PVP: Tsuas yog NVP monomer koom nrog hauv polymerization, thiab nws cov khoom yog polyvinyl pyrrolidone (PVP). NVP monomer tau dhau los ntawm tus kheej-crosslinking cov tshuaj tiv thaiv lossis NVP monomer tau dhau los ua cov tshuaj tiv thaiv kab mob sib kis nrog tus neeg sawv cev crosslinking (ib qho chaw uas muaj ntau pawg tsis txaus ntseeg), thiab cov khoom yog polyvinyl pyrrolidone (PVPP). Nws tuaj yeem pom tias los ntawm kev tswj cov txheej txheem polymerization sib txawv, ntau yam khoom siv polymerization tuaj yeem tsim tawm.

Peb nkag siab cov txheej txheem ntws ntawm PVP:

Kev siv cov qib kev lag luam PVP: PVP-K series tuaj yeem siv los ua zaj duab xis qub, thickener, lubricant, nplaum nyob rau hauv cov khoom siv tshuaj txhua hnub, siv tshuaj tsuag plaub hau, mousse, tshuaj tsuag plaub hau, tus neeg sawv cev, thiab lwm yam. PVP tuaj yeem muab ntxiv rau cov plaub hau zas xim, ua ib qho kev hloov kho hauv cov khoom tu tawv nqaij, ua npuas dej stabilizer hauv tshuaj zawv plaub hau, ua ib qho dispersant hauv yoj tus neeg sawv cev, thiab ua tus neeg sawv cev. Nws tuaj yeem txhim kho qhov ntub dej thiab lubrication ntawm lub ntsej muag cream thiab tshuaj pleev thaiv hnub; Thib ob, ntxiv PVP rau cov tshuaj ntxuav tes muaj cov nyhuv tiv thaiv xim zoo thiab tuaj yeem txhim kho lub peev xwm decontamination.

Kev siv PVP hauv kev lag luam thiab kev siv tshuab siab: PVP tuaj yeem siv los ua tus neeg sawv cev txheej txheej, dispersant, thickener, nplaum, thiab lwm yam hauv cov xim, luam ntawv inks, textiles, luam ntawv thiab dyeing, xim duab raj, uas tuaj yeem txhim kho kev sib raug zoo. kev ua tau zoo ntawm cov nplaum rau hlau, iav, yas thiab lwm yam ntaub ntawv. Tsis tas li ntawd, PVP kuj tau siv dav hauv cov khoom siv high-tech xws li kev sib cais membranes, ultrafiltration membranes, microfiltration membranes, nanofiltration membranes, oil exploration, photocurable resins, paints and coatings, optical fibers, laser video discs, etc.
Daim ntawv thov ntawm cov tshuaj qib PVP: Hauv PVP-K series, k30 yog ib qho ntawm cov khoom siv hluavtaws siv, feem ntau yog siv los ua cov neeg ua haujlwm tsim khoom, cov nplaum rau microparticles, cov tshuaj tiv thaiv-tso tawm, excipients thiab stabilizers rau txhaj tshuaj, flow aids, dispersants thiab colorants rau Kev npaj ua kua, stabilizers rau enzymes thiab thermosensitive tshuaj, coprecipitants rau cov tshuaj nyuaj-to-tolerate, fillers rau ophthalmic lubricants, txheej film-forming agents, thiab lwm yam.

Polyvinyl pyrrolidone thiab nws cov polymers, raws li cov khoom siv tshuaj zoo tshiab, tau siv dav hauv tshuaj, khoom noj, tshuaj txhua hnub, luam ntawv thiab dyeing, xim txheej, biomaterials, cov ntaub ntawv kho dej thiab lwm yam, thiab muaj kev lag luam dav dav. Tom qab xyoo ntawm kev tshawb nrhiav tas li, peb tau tsim ntau yam khoom siv polymer, suav nrog: