ngenisa
I-Cellulose TETERS ama-polymers anyibilika amanzi asuselwa ku-cellulose. Lawa ma-polymers anezicelo eziningi ezimbonini ezahlukahlukene ezinjengokudla, amakhambi, izimonyo kanye nokwakha ngenxa yezakhiwo zawo njengokuqina, ukugcwala, kwakha amafilimu, nokugcizelela. Enye yezinto ezibaluleke kakhulu ze-cellulose aferters izinga lokushisa lazo le-germation (TG), izinga lokushisa lapho i-polymer ibhekana khona noshintsho lwesigaba kusuka ku-sol to gel. Le mpahla ibalulekile ekutholeni ukusebenza kwezibopho ze-cellulose kuzicelo ezahlukahlukene. Kulesi sihloko, sixoxa ngokushisa okushisayo kwe-gelation ye-hydroxypropyllllylyll methylcellulose (HPMC), enye yezithambiso ezisetshenziswa kakhulu embonini embonini.
Ukushisa okushisayo kwe-gelalation ye-HPMC
I-HPMC iyi-serthetic celtulose ether esetshenziswa kakhulu kwizicelo ezahlukahlukene ngenxa yezakhiwo zayo ezihlukile. I-HPMC incane kakhulu emanzini, yakha izixazululo ezicacile ze-viscous ekugxileni okuphansi. Ekugxilisweni okuphezulu, amafomu e-HPMC ama-gels aphindiselwe ekushiseni nasekupholiseni. I-Thermal Gelation ye-HPMC yinqubo yezinyathelo ezimbili ezibandakanya ukwakheka kwama-Micelles alandelwa yi-Aggregation of Micelles ukwakha inethiwekhi yejeli (Umdwebo 1).
Amazinga okushisa afudumele we-HPMC ancike ezicini eziningana ezifana nezinga lokufaka esikhundleni (DS), isisindo samangqamuzana, ukugxilisa ingqondo, kanye nekhambi. Ngokuvamile, kukhuphuka isisindo se-DS kanye ne-molecular ye-HPMC, kukhuphuka izinga lokushisa elishisayo le-gelation. Ukuhlushwa kwe-HPMC kwisixazululo kuthinta ne-TG, kukhuphuka okuhlushwa, okuphezulu kwe-TG. I-PH yesisombululo futhi ithinta i-TG, ngezixazululo ze-acidic eziholela kwi-TG ephansi.
I-Thermal Gelation ye-HPMC iyaphindisela futhi ingathinteka yizici ezahlukahlukene zangaphandle ezifana ne-shear Force, izinga lokushisa, kanye nokuhlushwa usawoti. I-Shear yephula isakhiwo sejeli futhi yehlisa i-TG, ngenkathi kukhuphuka izinga lokushisa libangela ukuba ijeli lincibilike futhi linciphise i-TG. Ukungeza usawoti kwisisombululo futhi kuthinta i-TG, kanye nokuba khona kwezindawo ezifana ne-calcium ne-magnesium kwandisa i-TG.
Ukusetshenziswa kwe-TG HPMC ehlukile
Ukuziphatha kwe-thermogelling ye-HPMC kungalinganiswa ngezicelo ezihlukile. I-Low TG HPMCS isetshenziswa kuzinhlelo zokusebenza ezidinga i-gelisation esheshayo, njenge-dessert esheshayo, isoso kanye nokwakhiwa kwesobho. I-HPMC ene-TG ephezulu isetshenziswa kuzinhlelo zokusebenza ezidinga ukubekelwa ukubambezeleka noma ukuhlala isikhathi eside, njengokuhlelwa kwezinhlelo zokulethwa kwezidakamizwa, amaphilisi wokukhishwa okulondoloziwe, nokugqoka isilonda.
Embonini yokudla, i-HPMC isetshenziswa njengesikhulu, i-Stabilizer kanye ne-ejenti ye-gelling. I-Low TG HPMC isetshenziswa ekwakhiweni kwama-dessert okusheshayo adinga ukufutheka okusheshayo ukuhlinzeka ngokuthungwa okufunayo nomlomo. I-HPMC ene-TG ephezulu isetshenziswa ukwakheka kwamafutha aphansi lapho kuthathwa khona okubambezelekile noma isikhathi eside kufiswa ukuvikela i-syneresis nokugcina ukwakheka kwesakhiwo.
Embonini yezemithi, i-HPMC isetshenziswa njenge-binder, ukuqhelelana ne-ejenti yokukhishwa okuqhubekayo. I-HPMC ene-TG ephezulu isetshenziswa ekwakhiweni kwamathebulethi okukhishwa okunwetshiwe, lapho kudingeka khona ukubambezeleka noma ukuhlala isikhathi eside kudingeka ukukhipha umuthi esikhathini eside. I-Low TG HPMC isetshenziswa ekwakhiweni kwamathebulethi okusabalalisa ngomlomo, lapho kudingeka khona ukuhlukaniswa okusheshayo kanye ne-gelation kudinga ukuhlinzeka ngomlomo owufunayo wokugwinya.
Ekuphetheni
Ukushisa okushisayo kwe-gelation ye-HPMC kuyindawo esemqoka enquma ukuziphatha kwayo kuzicelo ezahlukahlukene. I-HPMC ingalungisa i-TG yayo ngezinga lokufakwa esikhundleni, isisindo se-molecular, ukugxilisa kanye nenani le-PH yesisombululo ukuze lihambisane nezicelo ezihlukile. I-HPMC ene-TG ephansi isetshenziselwa izinhlelo zokusebenza ezidinga i-gelation esheshayo, ngenkathi i-HPMC ene-TG ephezulu isetshenziselwa izinhlelo zokusebenza ezidinga ukubekelwa phansi noma isikhathi eside. I-HPMC iyi-ether ehlukahlukene futhi eguquguqukayo ye-cellulose enezicelo eziningi ezingaba khona ezimbonini ezahlukahlukene.
Isikhathi sePosi: Aug-24-2023