IHydroxyethylcellulose (HEC) i-non-ionic, i-polymer enyibilikayo emanzini ephuma kwi-cellulose. Ubume bayo beekhemikhali ezizodwa kunye neepropathi zenza ukuba ibe sisithako esiguquguqukayo kunye nezicelo ezahlukeneyo kuwo wonke amashishini afana namayeza, izinto zokuthambisa, ukutya, kunye nokhathalelo lomntu. Enye yeempawu zayo eziphawulekayo ziimpawu zayo ezigqwesileyo zokunqunyanyiswa, ezidlala indima ebalulekileyo kwimixube emininzi.
Ubume kunye neePropati ze-HEC
I-HEC ithathwe kwi-cellulose, eyipolymer eyenzeka ngokwemvelo efumaneka kwiindonga zeeseli zezityalo. Ngokusebenzisa uthotho lweekhemikhali, amaqela e-hydroxyethyl angeniswa kwi-cellulose backbone, ekhokelela kwipolima enyibilikayo emanzini eneempawu ezizodwa.
Ubume beMichiza: Isakhiwo esisisiseko se-cellulose siquka ukuphindaphinda iiyunithi ze-glucose ezidityaniswe kunye ne-β-1,4-glycosidic bond. Kwi-HEC, amanye amaqela e-hydroxyl (-OH) kwiiyunithi ze-glucose athatyathwa ngamaqela e-hydroxyethyl (-OCH2CH2OH). Olu tshintsho lunika ukunyibilika kwamanzi kwipolymer ngelixa kugcinwa umqolo we-cellulose.
Ukunyibilika kwamanzi: I-HEC inyibilika kakhulu emanzini, yenze izisombululo ezicacileyo, nezibonakalayo. I-degree of substitution (DS), ebonisa inani eliqhelekileyo lamaqela e-hydroxyethyl kwiyunithi ye-glucose, ichaphazela ukunyibilika kwepolymer kunye nezinye iimpawu. Amaxabiso aphezulu e-DS akhokelela ekunyibilikeni okukhulu kwamanzi.
I-Viscosity: Izisombululo ze-HEC zibonisa ukuziphatha kwe-pseudoplastic, oku kuthetha ukuba i-viscosity yabo iyancipha phantsi koxinzelelo lwe-shear. Le propati inenzuzo kwizicelo ezifana neengubo kunye ne-adhesives, apho izinto eziphathekayo zifuna ukuhamba ngokulula ngexesha lesicelo kodwa zigcine i-viscosity xa ziphumla.
Ukuqulunqwa kwefilimu: I-HEC inokwenza iifilimu ezicacileyo, eziguquguqukayo xa zomisiwe, okwenza ukuba zilungele ukusetyenziswa njenge-agent-forming agent kwizicelo ezahlukeneyo.
IiPropati zokunqunyanyiswa kwe-HEC
Ukunqunyanyiswa kubhekiselele kwisakhono semathiriyeli eyomeleleyo ukuhlala isasazwe ngokulinganayo kumbindi wolwelo ngaphandle kokuzinza ekuhambeni kwexesha. I-HEC ibonisa iipropathi ezigqwesileyo zokunqunyanyiswa ngenxa yezinto ezininzi:
I-Hydration kunye nokuDumba: Xa amasuntswana e-HEC ahlakazwe kwindawo yolwelo, agalela amanzi kwaye adumbe, enze inethiwekhi enemigangatho emithathu ebamba kwaye imise amasuntswana aqinileyo. Ubume be-hydrophilic be-HEC buququzelela ukuthatyathwa kwamanzi, okukhokelela ekunyuseni kwe-viscosity kunye nokuphucula ukuzinza kokumiswa.
Ukuhanjiswa kobungakanani beNqanaba: I-HEC inokumisa ngokufanelekileyo uluhlu olubanzi lwee-particle ubukhulu ngenxa yokukwazi ukwenza inethiwekhi kunye nobukhulu obuhlukeneyo be-mesh. Oku kuguquguquka kwenza ukuba ilungele ukunqumamisa zombini amasuntswana acolekileyo narhabaxa kwimiqulu eyahlukeneyo.
Ukuziphatha kwe Thixotropic: Izisombululo ze-HEC zibonisa ukuziphatha kwethixotropic, oku kuthetha ukuba i-viscosity yabo iyancipha ngokuhamba kwexesha phantsi koxinzelelo lwe-shear rhoqo kwaye iphinda ibuyele xa uxinzelelo lususiwe. Le propati ivumela ukuthulula lula kunye nesicelo ngelixa ugcina uzinzo kunye nokumiswa kweengqungquthela eziqinileyo.
I-pH Ukuzinza: I-HEC izinzile phezu koluhlu olubanzi lwamaxabiso e-pH, okwenza ukuba ilungele ukusetyenziswa kwi-acidic, i-neutral, kunye ne-alkaline formulations ngaphandle kokuphazamisa iimpawu zayo zokumisa.
Ukusetyenziswa kwe-HEC kwiiFomu zokuNxingwa
Iipropathi ezigqwesileyo ze-HEC zenza ukuba ibe sisithako esixabisekileyo kwiimveliso ezininzi kumashishini ahlukeneyo:
Iipeyinti kunye neeNgqungquthela: I-HEC isetyenziswa njenge-thickener kunye ne-arhente yokumisa kwiipeyinti ezisekelwe emanzini kunye neengubo zokuthintela ukuhlaliswa kwee-pigments kunye nezongezo. Ukuziphatha kwayo kwe-pseudoplastic kuququzelela ukusetyenziswa okugudileyo kunye nokugubungela okufanayo.
IiMveliso zoNakekelo loMntu: Kwii-shampoos, ukuhlamba umzimba, kunye nezinye iimveliso zokunyamekela, i-HEC inceda ukumisa izithako ze-particulate ezifana ne-exfoliants, ii-pigments, kunye ne-fragrance beads, ukuqinisekisa ukusabalalisa kunye nokuzinza kokuqulunqwa.
Uqulunqo lwamachiza: I-HEC iqeshwe ekunqunyanyisweni kwamachiza ukumisa izithako ezisebenzayo kunye nokuphucula ubumnandi kunye nokuzinza kweefom zedosi yolwelo lomlomo. Ukuhambelana kwayo kunye noluhlu olubanzi lwe-APIs (i-Active Pharmaceutical Ingredients) kunye ne-excipients yenza ukuba kube yinto ekhethiweyo yokukhethwa kwabaqulunqi.
Ukutya kunye neeMveliso zesiselo: I-HEC isetyenziswa kwizicelo zokutya ezinje ngokunxitywa kwesaladi, iisosi, kunye neziselo ukumisa izithako ezinganyibilikiyo ezifana nemifuno, iziqholo, kunye nentlaka. Ubume bayo obungenavumba kwaye obungenancasa buyenza ilungele ukusetyenziswa kwimixube yokutya ngaphandle kokuchaphazela iimpawu zoluvo.
IHydroxyethylcellulose (HEC) yipolima esebenza ngeendlela ezininzi eneempawu ezikhethekileyo zokunqunyanyiswa, nto leyo eyenza ukuba ibe sisithako esixabisekileyo kuluhlu olubanzi lwemixube kuwo wonke amashishini. Ikhono layo lokunqumamisa amasuntswana aqinileyo ngokulinganayo kumajelo eendaba angamanzi, kunye nezinye iimpawu ezinqwenelekayo ezifana nokunyibilika kwamanzi, ukulawulwa kwe-viscosity, kunye nokuzinza kwe-pH, kuyenza ibe yimfuneko kubaqulunqi abafuna ukuzuza iimveliso ezizinzileyo nezikumgangatho ophezulu. Njengoko iinzame zophando kunye nophuhliso ziqhubela phambili, izicelo ze-HEC ekumisweni kokunqunyanyiswa kulindeleke ukuba zande ngakumbi, ziqhube izinto ezintsha kunye nokuphucula ukusebenza kwemveliso kumacandelo ahlukeneyo.
Ixesha lokuposa: May-09-2024