IHydroxypropyl Methylcellulose (HPMC)yi-semi-synthetic cellulose derivative esetyenziswa kakhulu kwi-pharmacy, food, construction kunye ne-cosmetics. Kwi-shampoo formula, i-HPMC, njenge-multifunctional additive, idlala indima enkulu yokwenza i-formula ibe nkulu, i-film-formal, i-moisturizing, i-stabilizing the formular kunye nokuphucula amava omsebenzisi.
1. Ukuqina kunye nolawulo lwe-rheological: ukuphucula ubume kunye nokuziva kweshampu
Ukuqina kweshampu kuchaphazela ngokuthe ngqo amava omthengi. Ukuba ubume bayo buncinci kakhulu, inokubangela ukugalelwa kakhulu okanye ukusasazwa okungalinganiyo; ukuba ixinene kakhulu, kunzima ukuyisebenzisa ngokulinganayo. I-HPMC yipolymer enyibilikayo emanzini. Emva kokuba uthotho lwayo lweemolekyuli lunwebe emanzini, lwenza isakhiwo senethiwekhi esinemilinganiselo emithathu, nto leyo eyandisa kakhulu ukuqina kwenkqubo ngokuxinana komzimba kunye nokubophelela ihydrogen.
Lawula ngokuchanekileyo i-viscosity
Isiphumo sokutyeba se-HPMC sinxulumene ngokusondeleyo nomlinganiselo wokutshintshwa (umlinganiselo wamaqela e-hydroxypropyl kunye ne-methoxy), ubunzima be-molecular kunye noxinzelelo lwesisombululo. Umzekelo, i-HPMC efakwe endaweni ephezulu (njenge-HPMC K100M) inokubonelela ngamandla okutyeba aqinileyo, ngelixa iimodeli ezine-viscosity ephantsi (njenge-HPMC E5) zifanelekile kwiimfuno zokutyeba okuncinci. Ii-formulators zinokukhetha iimodeli ngokuguquguqukayo ngokwendlela ekujoliswe kuyo (i-gel, i-emulsion, njl.njl.).
Iimpawu zokunciphisa ukucheba
Xa abathengi becinezela ibhotile, ukuqina kweshampu enobukhulu be-HPMC kuncipha okwethutyana ngenxa yesenzo samandla okucheba, okwenza kube lula ukuthulula; emva kokuma, ibuyisela ukuqina kwayo kokuqala ukuze iphephe ukuqhekeka ngexesha lokugcina. Le "thixotropy" yenza kube lula ukuyisebenzisa.
2. Ukwakheka kwefilimu kunye nokunyamekela iinwele: Ukwakha umqobo wokukhusela iinwele
Ipropati yokwenza ifilimu ye-HPMC yinzuzo yayo ephambili eyahlula kwii-thickeners eziqhelekileyo. Iibhondi ze-hydroxyl kunye ne-ether kwiimolekyuli zayo zinokwenza iibhondi ze-hydrogen kunye ne-keratin yeenwele ukuze zenze ifilimu ecacileyo neguquguqukayo phezu kobuso beenwele.
Nciphisa umonakalo woomatshini
Ngexesha lenkqubo yokuhlanjwa ngeshampu, izikali zeenwele zinokulungela ukugoba ngenxa yokungqubana. Ifilimu yeHPMC ingayilungisa izikali zeenwele kwaye inciphise umlinganiselo wokungqubana ngexesha lokukama (uphando lubonisa ukuba inokunciphisa ukungqubana malunga ne-30%), ngaloo ndlela inciphise ukuqhekeka kweenwele kunye nombane ongashukumiyo.
Uphuculo lombala kunye nokutshixa
Kubantu abadaya iinwele zabo, ifilimu ye-HPMC inokulibazisa ukulahleka kweemolekyuli zepigment kwaye yandise ukuqina kombala weenwele. Kwangaxeshanye, umaleko wefilimu ofanayo unokuphucula ukukhanya kwaye wenze iinwele zibe nokukhanya kwendalo. Uvavanyo lubonisa ukuba ukongeza i-1% ye-HPMC kwishampu kunokunyusa ukukhanya komphezulu weenwele nge-15%-20%.
3. Ukufumisa nokulungisa iinwele: Ukugcina ulungelelwano lokufuma kweenwele
Umthamo wamanzi ezinweleni ezisempilweni umalunga ne-10%-15%. Indlela yokufumisa ye-HPMC ibandakanya iinkalo ezimbini:
I-Hygroscopicity
Amaqela athanda amanzi (-OH, -OCH3) kwimolekyuli anokubopha kumswakama okwindalo esingqongileyo. Phantsi kweemeko zokufuma ezingama-60%, ukufunxwa komswakama olinganayo kwe-HPMC kunokufikelela kwi-12%-15%, okunceda iinwele zigcine ukufuma okuphakathi.
Ukutywina
Ifilimu eyenziweyo inokunciphisa ukufuma kwamanzi. Emva kokuvavanya, emva kokusebenzisa ishampu ene-HPMC, izinga lokulahleka kwamanzi kweenwele kwindawo eyomileyo kangangeeyure ezisi-8 lincitshiswa malunga nama-25%.
4. Uzinzo lwefomula: “Injineli yesakhiwo” yenkqubo yezigaba ezininzi
Iishampoo zanamhlanje zizinto ezintsonkothileyo eziqulathe ioyile ye-silicone, izicatshulwa zezityalo, kunye namasuntswana axotyulweyo (njenge-anti-dandruff agent ZPT). I-HPMC yonyusa uzinzo ngokusebenzisa ezi ndlela zilandelayo:
Ukusasazeka kokumiswa
Ulwakhiwo lwenethiwekhi lunokuthwala amasuntswana anoxinano oluphezulu (njengoxinano lwe-ZPT ≈ 1.8 g/cm³) ukuthintela ukubola kwenkunkuma. Ukongeza i-0.5% ye-HPMC kunokwandisa uzinzo lokumiswa kwe-ZPT ukusuka kwiintsuku ezi-3 ukuya kwiinyanga ezingaphezu kwezi-6.
Uncedo lokuxuba i-emulsification
Sebenzisana nama-surfactants ukunciphisa uxinzelelo phakathi kweoyile namanzi kunye nokuphucula ukusebenza kakuhle kwe-emulsification yezinto ezisebenzisa amanzi amdaka njengeoyile ye-silicone. Izifundo zibonise ukuba i-HPMC inokunciphisa ukusasazwa kobukhulu bee-particle ze-emulsions ukusuka kwi-5-50μm ukuya kwi-1-10μm.
5. Ubumnene kunye nokhuseleko: izithako ezibuthathaka ezilungele ulusu lwentloko
Xa kuthelekiswa neziqhoboshi zemveli (ezifana nee-polymers ze-acrylic), i-HPMC ineengenelo ezibalulekileyo:
I-Non-ionic: akukho ngxabano yetshaja kunye ne-anionic surfactants (ezifana ne-SLES)
Ukunyamezelana kwe-pH ebanzi: izinzile kuluhlu lwe-pH oluyi-3-11, ifanelekile kwiinkqubo ezahlukeneyo zokwenziwa
Ukuhambelana okuphezulu kwezinto eziphilayo: Uvavanyo lwe-OECD, amanqaku ayo okucaphuka kwesikhumba yi-0 (ayicaphukisi), isalathisi sokucaphuka kwamehlo yi-1.2 (ngaphantsi komda we-3.0)
6. Imizekelo yokusetyenziswa kunye neendlela ezintsha
Ifomula engena-silicone: I-HPMC kunye ne-cationic guar gum zixutywe ukuze zithathe indawo ye-silicone oil ukuze zinike uburhabaxa. Umzekelo, uhlobo oluthile lwe-shampoo ethi “0 silicone oil” isebenzisa i-1.2% HPMC + 0.5% guar gum C-14S, kwaye amandla okukama ancitshiswa ngama-42%.
Ukuhanjiswa okusebenzayo: Sebenzisa iipropati ze-HPMC ezinobuthathaka kubushushu (ubushushu obuphantsi besisombululo esibalulekileyo bumalunga nama-60°C) ukuze uphuhlise iimveliso zeshampu ezikrelekrele ezinokukhupha izithako zokhathalelo lweenwele kubushushu bomzimba.
I-HPMCifezekisa ulungelelwano phakathi kokusebenza kunye nokhuseleko kwi-shampoo. Ixabiso layo alibonakali kuphela ekuphuculeni ukusebenza okusisiseko, kodwa likwabonelela ngethuba lokuvelisa ifomyula. Njengoko imfuno yabathengi "yobuhle obucocekileyo" kunye nokucaca kokusebenza kakuhle isanda, esi sithako sendalo siya kuqhubeka sidlala indima ephambili. Kwixesha elizayo, uphuhliso lwe-zwitterionic HPMC derivatives ngokuguqulwa kweekhemikhali lunokuba yindlela entsha yokuphucula ukuhambelana kwayo kunye nokusebenza kwayo.
Ixesha leposi: Epreli-16-2025