Ukuphucula iTexture kunye neRheology yeCosmetics ngeHPMC

I-HPMC (i-hydroxypropyl methylcellulose) yinto ephuma ngokwemvelo eselulose ephuma kwi-cellulose esetyenziswa ngokubanzi kwizithambiso nakwiimveliso zokhathalelo lomntu. Ngenxa yeempawu zayo ezikhethekileyo zomzimba kunye neekhemikhali, inezicelo ezininzi kukhathalelo lwesikhumba, ukhathalelo lweenwele kunye neemveliso zokuthambisa.

Iimpawu ezisisiseko ze-HPMC
I-HPMC yipolima enyibilikayo emanzini iguqulwe ngokwemichiza ukusuka kwiselulosi. Ubume bayo bemolekyuli bubandakanya amaqela e-hydrophilic hydroxyl kunye ne-hydrophobic methyl kunye namaqela epropyl, enika ukunyibilika okulungileyo kunye nokukwazi ukutyeba emanzini. Iimpawu ze-HPMC ikakhulu zixhomekeke kwiqondo layo lokuthatha indawo (umlinganiselo we-hydroxypropyl ukuya kwi-methyl) kunye nobunzima bemolekyuli. Ezi zinto zichaphazela ngokuthe ngqo ukusebenza kwayo kwiindlela ezahlukeneyo.

Indima ye-HPMC kwizinto zokuthambisa
I-Thickener: I-HPMC inokwenza isisombululo se-viscous ecacileyo emanzini, ngoko isoloko isetyenziswa njenge-thickener kwizinto zokuthambisa. Impembelelo yayo yokuqina ithambile kwaye inokunyusa kakhulu i-viscosity yemveliso kwiindawo eziphantsi. Xa kuthelekiswa nezityebe zemveli ezifana ne-carbomer, inzuzo ye-HPMC kukuba ayicaphuki kangako ulusu kwaye inokudala ukuthungwa okugudileyo, okusilika.

I-Emulsion stabilizer: Kwi-emulsion kunye nemveliso yokunamathisela, i-HPMC ingasetyenziselwa njenge-emulsion stabilizer ukunceda isigaba seoli kunye nesigaba samanzi sidibanise kakuhle kwaye sithintele ukuhlukana kweoli kunye namanzi. Le propati ibaluleke kakhulu kwiimveliso ezinokhilimu ezifana ne-sunscreens kunye ne-skin creams. I-HPMC igcina uzinzo lwemveliso ngokwenza isakhiwo se-micelle esizinzileyo esonga amathontsi e-oyile kwaye uwasasaze ngokulinganayo kwinqanaba lamanzi.

I-ejenti yokwenza ifilimu: I-HPMC ineempawu zokwenza ifilimu kwaye inokwenza ifilimu ekhuselayo ethambileyo nephefumulayo eluswini. Olu phawu lusetyenziswa kwiimveliso zokuthambisa, ezinje ngesiseko solwelo kunye nesithunzi samehlo, ukomeleza ukuqina kwemveliso kwaye ithintele ukuba ingawi okanye ibhubhe. Ukongeza, iipropathi zokwenza ifilim ze-HPMC zinokuphucula isiphumo sokuthambisa seemveliso zokhathalelo lwesikhumba kwaye zincede ukutshixa ukufuma.

I-Lubricant kunye ne-slip: I-HPMC inokuphucula ukuthanjiswa kweefomyula kwizinto zokuthambisa, ukwenza kube lula ukufaka kunye nokusabalalisa imveliso ngokulinganayo esikhumbeni okanye ezinweleni. Umzekelo, kwii-conditioners, i-HPMC inokuphucula ubusilika, yenza iinwele zibe lula kwaye zibe lula ukukama. Esi siphumo sokuthambisa sivela kwisisombululo se-viscous esenziwe yi-HPMC enyibilikiswe emanzini, enokuthi yenze ifilimu ekhuselayo eluswini okanye kumphezulu weenwele, ngaloo ndlela inciphisa ukungqubana.

Ukuphucula ukuthungwa kwezinto zokuthambisa
Ukuthungwa yenye yeempawu ezibalulekileyo zezithambiso, ezichaphazela ngokuthe ngqo amava abathengi. Njengesiguquli se-thickener esisetyenziswa ngokuqhelekileyo kunye ne-rheology, i-HPMC inokuphucula kakhulu ukuthungwa kwezinto zokuthambisa, ngokukodwa kule miba ilandelayo:

Ukuziva okuthambileyo: Ulwelo lwe-colloidal olwenziwe emva kokuba i-HPMC inyibilikisiwe inochuku olugudileyo, oluvumela ukuba lunike izinto zokuthambisa kunye neekhrimu ukuthungwa okubuthathaka ngakumbi. Xa idibene nezinye izinto eziluhlaza ezifana namafutha kunye ne-wax, inokunciphisa i-graininess yemveliso, ikhulise ukuhambelana kwefomula kunye nokulula kwesicelo.

Ukuthamba: Kukhathalelo lwesikhumba, ukuthamba okuthambileyo kunceda iimveliso zingene kwaye zifunxe ngcono. Ifilimu eyenziwe yi-HPMC inokuguquguquka okuhle kunye nokunwebeka, okunokunceda iimveliso zisasazeke ngokulinganayo kumphezulu wolusu ngelixa zigcina ukuthamba okuphakathi ukuphepha iimveliso ezincangathi kakhulu okanye zomile.

I-Scalability: Kwizinto zokuthambisa, i-HPMC iphucula i-ductility yemveliso ngokuhlengahlengisa ubumanzi befomyula. Ngokukodwa kwiimveliso ze-makeup, ezifana nesiseko, i-lipstick, njl., i-HPMC inokunceda imveliso ibambelele esikhumbeni ngokulinganayo kwaye ithintele ukunamathela kwe powder okanye ukungalingani.

Ukuphucula i-rheology
I-Rheology ibhekisela kwiipropati zezinto ezihambayo kunye nokukhubazeka phantsi kweempembelelo zamandla angaphandle. Kwizimonyo, i-rheology ichaphazela ngokuthe ngqo ukusasazeka, ukuzinza kunye nokubonakala kwemveliso. Njengesilungiso se-rheology, i-HPMC inokuphucula kakhulu iipropati ze-rheological zezithambiso, zibenze zikhululeke ngakumbi kwaye zisebenze ngokulula ngexesha lokusetyenziswa.

Ukucheba ukucheba: Isisombululo se-HPMC sibonisa iimpawu ezithile zolwelo ezingezizo ezeNewtonian, ngakumbi iipropathi zokucheba ezibhityileyo kwiindawo eziphezulu. Oku kuthetha ukuba xa kusetyenziswe amandla angaphandle (umzekelo, ukusabalalisa, ukuvuselela), i-viscosity yesisombululo iyancipha, okwenza imveliso ibe lula ukusabalalisa nokusabalalisa. Nje ukuba usetyenziso luyekile, i-viscosity ibuyela ngokuthe ngcembe, iqinisekisa ukuba imveliso ayiqhubeki okanye ithontsize.

Thixotropy: I-HPMC ine-thixotropy, oku kuthetha ukuba ibonisa i-viscosity ephezulu kwi-static state ukuphepha ukuhamba kwemveliso, kodwa xa ibonakaliswe kumandla angaphandle, i-viscosity iyancipha, yenza kube lula ukuyisebenzisa. Olu phawu lwenza i-HPMC ilungele kakhulu ukusetyenziswa kwi-sunscreen, isiseko kunye nezinye iimveliso ezifuna umaleko wefilimu esikhumbeni.

Ukuzinza kwemveliso: I-HPMC ayiphuculi nje ukuthungwa kwemveliso, kodwa iphucula ukuzinza kwayo. Kwi-emulsions okanye ukumiswa, i-HPMC inokunciphisa izinto ezingazinzanga ezifana ne-oil-water stratification kunye nokuhlaliswa kwe-particle, kunye nokwandisa ubomi beshelufu yeemveliso ngokunyusa kunye nokuphucula isakhiwo sothungelwano.

Njengezinto ezisebenzayo ekrwada, i-HPMC ibonelela abaphuhlisi bokuqulunqa uluhlu olubanzi lwezicelo ezinokwenzeka ngokuphucula ukuthungwa kunye ne-rheology yezinto zokuthambisa. Ayiphuculi nje kuphela inkangeleko kunye nokusetyenziswa kwamava okuthambisa, kodwa inemisebenzi eyahlukeneyo efana nokubunjwa kwefilimu, ukuthambisa, kunye nokuzinzisa, okwenza imveliso ikhululeke ngakumbi, ihlala ixesha elide, kwaye ikhuselekile. Njengoko iimfuno zoshishino lwezithambiso zokuthungwa kunye ne-rheology yonyuka, amathuba okusebenza kwe-HPMC aya kuba banzi ngakumbi.