Hydroxypropyl Methylcellulose (HPMC)yog ib qho semi-synthetic cellulose derivative dav siv hauv kev lag luam tshuaj, khoom noj, kev tsim kho thiab tshuaj pleev ib ce. Hauv cov tshuaj zawv plaub hau, HPMC, ua ib qho khoom siv ntau yam, feem ntau ua lub luag haujlwm ntawm thickening, zaj duab xis-tsim, moisturizing, stabilizing lub mis thiab txhim kho kev paub ntawm tus neeg siv.
1. Kev ua kom tuab thiab kev tswj hwm rheological: ua kom zoo dua qhov kev ntxhib los mos thiab kev xav ntawm cov tshuaj zawv plaub hau
Qhov viscosity ntawm cov tshuaj zawv plaub hau ncaj qha cuam tshuam rau tus neeg siv khoom qhov kev paub. Yog tias cov qauv nyias dhau, nws yuav ua rau muaj ntau dhau los yog tsis sib npaug; yog tias nws viscous dhau, nws nyuaj rau thov kom sib npaug. HPMC yog cov polymer uas yaj hauv dej. Tom qab nws cov saw molecular ncab hauv dej, nws tsim cov qauv network peb-seem, uas ua rau qhov viscosity ntawm lub cev ntau ntxiv los ntawm kev sib koom ua ke thiab hydrogen bonding.
Tswj tau qhov viscosity kom raug
Qhov cuam tshuam ntawm HPMC ua kom tuab yog ze rau qib ntawm kev hloov pauv (qhov sib piv ntawm hydroxypropyl thiab methoxy pawg), qhov hnyav molecular thiab qhov concentration ntawm cov kua. Piv txwv li, HPMC uas hloov pauv ntau heev (xws li HPMC K100M) tuaj yeem muab lub peev xwm ua kom tuab dua, thaum cov qauv qis-viscosity (xws li HPMC E5) yog qhov tsim nyog rau cov kev xav tau me ntsis tuab. Cov neeg tsim qauv tuaj yeem xaiv cov qauv raws li cov qauv (gel, emulsion, thiab lwm yam).
Cov yam ntxwv ntawm kev txiav cov khoom nyias nyias
Thaum cov neeg siv khoom nias lub raj mis, qhov viscosity ntawm HPMC-thickened shampoo txo qis ib ntus nyob rau hauv qhov kev ua ntawm lub zog shear, ua rau nws yooj yim dua rau nchuav; tom qab sawv ntsug, nws rov qab kho nws cov viscosity qub kom tsis txhob muaj stratification thaum lub sijhawm khaws cia. Qhov "thixotropy" no ua rau yooj yim siv.
2. Kev tsim cov zaj duab xis thiab kev saib xyuas plaub hau: Tsim kom muaj ib daim thaiv plaub hau
Lub zog ua zaj duab xis ntawm HPMC yog nws qhov zoo tseem ceeb uas ua rau nws txawv ntawm cov thickeners ib txwm muaj. Cov hydroxyl thiab ether bonds hauv nws cov molecules tuaj yeem tsim cov hydrogen bonds nrog cov plaub hau keratin los tsim cov zaj duab xis pob tshab thiab yoog tau ntawm qhov chaw ntawm cov plaub hau.
Txo kev puas tsuaj ntawm cov khoom siv kho tshuab
Thaum lub sijhawm ntxuav plaub hau, cov plaub hau yuav yooj yim nkhaus vim muaj kev sib txhuam. Zaj duab xis HPMC tuaj yeem ua rau cov plaub hau du thiab txo qhov sib txhuam thaum lub sijhawm zuag (kev tshawb fawb qhia tias nws tuaj yeem txo qhov sib txhuam li ntawm 30%), yog li txo cov plaub hau tawg thiab hluav taws xob zoo li qub.
Xim xauv thiab gloss txhim kho
Rau cov neeg uas zas plaub hau, zaj duab xis HPMC tuaj yeem ncua qhov poob ntawm cov xim molecules thiab ua kom cov xim plaub hau ntev dua. Tib lub sijhawm, cov txheej zaj duab xis sib xws tuaj yeem txhim kho kev cuam tshuam ntawm lub teeb thiab ua rau cov plaub hau ci ntsa iab. Kev sim qhia tau tias kev ntxiv 1% HPMC rau tshuaj zawv plaub hau tuaj yeem ua rau qhov cuam tshuam ntawm cov plaub hau nce ntxiv 15% -20%.
3. Ua kom cov plaub hau noo thiab txias: Tswj cov plaub hau kom noo noo sib npaug
Cov dej ntawm cov plaub hau noj qab haus huv yog li 10% -15%. Lub tshuab ua kom noo noo ntawm HPMC suav nrog ob yam:
Kev Hygroscopicity
Cov pawg hydrophilic (-OH, -OCH3) hauv lub molecule tuaj yeem khi rau cov dej noo hauv ib puag ncig. Hauv qab 60% cov av noo, qhov sib npaug ntawm cov dej noo nqus ntawm HPMC tuaj yeem ncav cuag 12% -15%, pab cov plaub hau kom tswj tau cov dej noo nruab nrab.
Kev kaw
Cov zaj duab xis uas tsim tau tuaj yeem txo cov dej evaporation. Tom qab sim, tom qab siv cov tshuaj zawv plaub hau uas muaj HPMC, qhov dej poob ntawm cov plaub hau hauv qhov chaw qhuav rau 8 teev raug txo kom txog li 25%.
4. Kev ruaj khov ntawm cov mis: "Tus kws tsim qauv" ntawm ntau lub kaw lus
Cov tshuaj zawv plaub hau niaj hnub no feem ntau yog cov txheej txheem nyuaj uas muaj cov roj silicone, cov nroj tsuag extracts, thiab cov khoom me me (xws li cov tshuaj tiv thaiv dandruff ZPT). HPMC txhim kho kev ruaj khov los ntawm cov txheej txheem hauv qab no:
Kev ncua kev tawg
Cov qauv network tuaj yeem nqa cov khoom me me uas muaj qhov ceev dua (xws li ZPT qhov ceev ≈ 1.8 g / cm³) los tiv thaiv kev ua kom av noo. Ntxiv 0.5% HPMC tuaj yeem txuas ntxiv qhov ruaj khov ntawm ZPT los ntawm 3 hnub mus rau ntau dua 6 lub hlis.
Kev pab txhawb kev ua kom cov emulsification
Ua haujlwm nrog surfactants kom txo qhov kev sib txhuam ntawm cov roj-dej thiab txhim kho qhov ua tau zoo ntawm cov khoom hydrophobic xws li roj silicone. Cov kev tshawb fawb tau qhia tias HPMC tuaj yeem txo qhov faib tawm ntawm cov khoom me me ntawm cov emulsions los ntawm 5-50μm mus rau 1-10μm.
5. Mos thiab muaj kev nyab xeeb: cov khoom xyaw uas zoo rau daim tawv nqaij rhiab heev
Piv nrog cov thickeners ib txwm muaj (xws li acrylic polymers), HPMC muaj cov txiaj ntsig zoo:
Tsis yog-ionic: tsis muaj kev sib cav sib ceg nrog cov surfactants anionic (xws li SLES)
Kev kam rau siab pH dav: ruaj khov hauv pH ntau ntawm 3-11, tsim rau ntau hom kev tsim tshuaj sib txawv
Kev sib raug zoo siab: OECD xeem, nws cov qhab nia khaus tawv nqaij yog 0 (tsis khaus), qhov muag khaus qhov ntsuas yog 1.2 (qis dua qhov txwv ntawm 3.0)
6. Piv txwv ntawm daim ntawv thov thiab cov qauv tshiab
Cov mis mos uas tsis muaj silicone: HPMC thiab cationic guar gum raug sib xyaw ua ke los hloov cov roj silicone kom du. Piv txwv li, ib hom tshuaj zawv plaub hau "0 silicone oil" siv 1.2% HPMC + 0.5% guar gum C-14S, thiab lub zog sib xyaw txo qis 42%.
Kev xa khoom nquag: Siv cov khoom siv kub-rhiab ntawm HPMC (qhov kub qis tseem ceeb yog li 60 ° C) los tsim cov khoom siv zawv plaub hau ntse uas tuaj yeem tso cov khoom xyaw saib xyuas plaub hau ntawm lub cev kub.
HPMCua tiav qhov sib npaug ntawm kev ua haujlwm thiab kev nyab xeeb hauv tshuaj zawv plaub hau. Nws tus nqi tsis yog tsuas yog pom tseeb hauv kev ua kom zoo ntawm kev ua tau zoo xwb, tab sis kuj muab qhov ua tau rau kev tsim kho tshiab. Raws li cov neeg siv khoom xav tau "kev zoo nkauj huv si" thiab kev pom tseeb ntawm kev ua haujlwm nce ntxiv, cov khoom xyaw ntuj no yuav txuas ntxiv ua lub luag haujlwm tseem ceeb. Yav tom ntej, kev txhim kho ntawm zwitterionic HPMC derivatives los ntawm kev hloov kho tshuaj yuav dhau los ua ib qho kev taw qhia tshiab los txhim kho nws qhov sib xws thiab kev ua haujlwm.
Lub sijhawm tshaj tawm: Plaub Hlis-16-2025