HPMC imasewera mu shampu?

Hydroxypropyl Methylcellulose (HPMC)ndi chinthu chopangidwa ndi semi-synthetic cellulose chomwe chimagwiritsidwa ntchito kwambiri mu mankhwala, chakudya, zomangamanga ndi zodzoladzola. Mu shampoo formula, HPMC, monga chowonjezera cha ntchito zambiri, imagwira ntchito makamaka pakukhuthala, kupanga filimu, kunyowetsa, kukhazikika kwa fomula ndikukweza zomwe ogwiritsa ntchito amagwiritsa ntchito.

1. Kukhuthala ndi malamulo a rheological: kukonza kapangidwe ndi momwe shampu imamvekera

Kukhuthala kwa shampu kumakhudza mwachindunji zomwe wogwiritsa ntchito akumana nazo. Ngati kapangidwe kake ndi kopyapyala kwambiri, kangayambitse kuthira kwambiri kapena kufalikira kosagwirizana; ngati kali kokhuthala kwambiri, zimakhala zovuta kugwiritsa ntchito mofanana. HPMC ndi polima wosungunuka m'madzi. Pambuyo poti unyolo wake wa mamolekyu utambasulidwe m'madzi, umapanga kapangidwe ka netiweki ya magawo atatu, komwe kumawonjezera kwambiri kukhuthala kwa dongosolo kudzera mu kutsekeka kwa thupi ndi kulumikizidwa kwa hydrogen.

Yang'anirani molondola kukhuthala

Mphamvu ya HPMC yokhuthala imagwirizana kwambiri ndi kuchuluka kwa kusintha (chiŵerengero cha magulu a hydroxypropyl ndi methoxy), kulemera kwa mamolekyulu ndi kuchuluka kwa yankho. Mwachitsanzo, HPMC yosinthidwa kwambiri (monga HPMC K100M) ingapereke mphamvu yokhuthala kwambiri, pomwe mitundu yotsika (monga HPMC E5) ndi yoyenera pazosowa zochepa zokhuthala. Opanga amatha kusankha mitundu mosinthasintha malinga ndi kapangidwe kake (gel, emulsion, ndi zina zotero).

Kapangidwe ka kuchekerera tsitsi

Anthu akamafinya botolo, kukhuthala kwa shampu yokhuthala ya HPMC kumachepa kwakanthawi chifukwa cha mphamvu yodula, zomwe zimapangitsa kuti ikhale yosavuta kuthira; ikayima, imabwezeretsa kukhuthala kwake koyambirira kuti isagawike panthawi yosungira. "thixotropy" iyi imapangitsa kuti kugwiritsa ntchito kukhale kosavuta.

2. Kupanga filimu ndi kusamalira tsitsi: Kupanga chotchinga choteteza tsitsi

Kapangidwe ka HPMC kopanga filimu ndi ubwino wake waukulu womwe umasiyanitsa ndi zinthu zokhuthala wamba. Ma hydroxyl ndi ether bonds m'mamolekyu ake amatha kupanga ma hydrogen bonds ndi hair keratin kuti apange filimu yowonekera komanso yosinthasintha pamwamba pa tsitsi.

Chepetsani kuwonongeka kwa makina

Pakutsuka tsitsi, mamba a tsitsi amatha kupindika chifukwa cha kukangana. Filimu ya HPMC imatha kusalala mamba a tsitsi ndikuchepetsa kuchuluka kwa kukangana panthawi yopaka (kafukufuku akuwonetsa kuti imatha kuchepetsa kukangana ndi pafupifupi 30%), motero imachepetsa kusweka kwa tsitsi ndi magetsi osasinthasintha.

Kukongoletsa mtundu ndi kunyezimira

Kwa anthu omwe amapaka utoto tsitsi lawo, filimu ya HPMC imatha kuchedwetsa kutayika kwa mamolekyu a pigment ndikuwonjezera kulimba kwa utoto wa tsitsi. Nthawi yomweyo, gawo lofanana la filimuyo lingapangitse kuwala kuwonekere bwino ndikupangitsa tsitsi kukhala lowala mwachilengedwe. Kafukufuku akuwonetsa kuti kuwonjezera 1% HPMC ku shampu kungawonjezere kunyezimira kwa pamwamba pa tsitsi ndi 15%-20%.

3. Kunyowetsa ndi kukonza tsitsi: Kusunga bwino madzi m'tsitsi

Madzi a tsitsi labwino ndi pafupifupi 10%-15%. Njira yonyowetsera tsitsi ya HPMC imaphatikizapo zinthu ziwiri:

Hygroscopicity

Magulu okonda madzi (-OH, -OCH3) omwe ali mu molekyulu amatha kugwirizana ndi chinyezi chomwe chili m'chilengedwe. Pansi pa chinyezi cha 60%, kuyamwa kwa chinyezi cha HPMC kumatha kufika 12%-15%, zomwe zimathandiza tsitsi kukhala ndi chinyezi chapakati.

Kutseka

Filimu yopangidwayo imatha kuchepetsa kuuma kwa madzi. Pambuyo poyesa, mutagwiritsa ntchito shampu yokhala ndi HPMC, kuchuluka kwa madzi omwe amataya tsitsi pamalo ouma kwa maola 8 kumachepa ndi pafupifupi 25%.

4. Kukhazikika kwa fomula: "Mainjiniya wa kapangidwe ka zinthu" wa dongosolo la magawo ambiri

Ma shampu amakono nthawi zambiri amakhala ovuta kugwiritsa ntchito okhala ndi mafuta a silicone, zotulutsa zomera, ndi tinthu tating'onoting'ono tomwe timachotsedwa (monga mankhwala oletsa dandruff ZPT). HPMC imalimbitsa kukhazikika kwa tsitsi kudzera mu njira zotsatirazi:

Kufalikira kwa kuyimitsidwa

Kapangidwe ka netiweki kangathe kunyamula tinthu tating'onoting'ono tokhala ndi kachulukidwe kakakulu (monga kachulukidwe ka ZPT ≈ 1.8 g/cm³) kuti tipewe kutayikira kwa madzi. Kuwonjezera 0.5% HPMC kungapangitse kuti kukhazikika kwa ZPT kukhale kolimba kuyambira masiku atatu mpaka miyezi yoposa 6.

Thandizo la emulsification

Gwirizanani ndi ma surfactants kuti muchepetse kupsinjika kwa madzi ndi mafuta ndikuwonjezera mphamvu ya emulsification ya zinthu zotsutsana ndi madzi monga mafuta a silicone. Kafukufuku wasonyeza kuti HPMC ikhoza kuchepetsa kufalikira kwa tinthu tating'onoting'ono ta emulsions kuyambira 5-50μm mpaka 1-10μm.

5. Kufatsa ndi chitetezo: zosakaniza zosavuta zomwe zimagwirizana ndi khungu la mutu

Poyerekeza ndi zothina zachikhalidwe (monga ma polima a acrylic), HPMC ili ndi ubwino waukulu:

Non-ionic: palibe kutsutsana kwa mphamvu ndi ma surfactants a anionic (monga SLES)

Kulekerera pH kwakukulu: kokhazikika pa pH ya 3-11, koyenera machitidwe osiyanasiyana opangira

Kugwirizana kwakukulu kwa zamoyo: Mayeso a OECD, kuchuluka kwake kwa kuyabwa pakhungu ndi 0 (kosakwiyitsa), index ya kuyabwa m'maso ndi 1.2 (pansi pa malire a 3.0)

6. Zitsanzo za kagwiritsidwe ntchito ndi njira zatsopano zogwirira ntchito

Fomula yopanda silicone: HPMC ndi cationic guar gum zimaphatikizidwa kuti zilowe m'malo mwa mafuta a silicone kuti zikhale zosalala. Mwachitsanzo, mtundu wina wa shampu ya "0 silicone oil" imagwiritsa ntchito 1.2% HPMC + 0.5% guar gum C-14S, ndipo mphamvu yophimba imachepetsedwa ndi 42%.

Kupereka mwachangu: Gwiritsani ntchito mphamvu za HPMC zomwe zimakhudzidwa ndi kutentha (kutentha kochepa kwa yankho ndi pafupifupi 60°C) kuti mupange mankhwala anzeru a shampu omwe amatha kutulutsa zosakaniza zosamalira tsitsi kutentha kwa thupi.

HPMCimakwaniritsa bwino magwiridwe antchito ndi chitetezo cha shampu. Kufunika kwake sikungowoneka kokha pakukonza magwiridwe antchito oyambira, komanso kumapereka mwayi wopanga njira zatsopano. Pamene kufunikira kwa ogula "kukongola koyera" ndi kuwonekera bwino kwa magwiridwe antchito kumawonjezeka, chopangira ichi chochokera mwachilengedwe chidzapitirizabe kuchita gawo lofunika kwambiri. M'tsogolomu, kupanga zinthu zochokera ku zwitterionic HPMC kudzera mu kusintha kwa mankhwala kungakhale njira yatsopano yowonjezera kugwirizana kwake ndi magwiridwe antchito.