Umahluko phakathi kwe-hydroxypropyl starch kunye ne-Hydroxypropyl methyl cellulose

I-Hydroxypropyl starch kunye ne-hydroxypropyl methyl cellulose (HPMC) zombini iipolysaccharides eziguquliweyo ezisetyenziswa kumashishini ahlukeneyo, kubandakanya ukutya, amayeza, izinto zokuthambisa, kunye nokwakha. Ngelixa babelana ngokufana okuthile, banomahluko ohlukileyo malunga nokwakheka kweekhemikhali, iipropathi, kunye nokusetyenziswa. Nantsi eyona mahluko phakathi kwe-hydroxypropyl starch kunye ne-HPMC:

Ulwakhiwo lweMichiza:

1. Isitatshi seHydroxypropyl:
   • I-Hydroxypropyl starch sisitatshi esilungisiweyo esifunyenwe ngokwazisa amaqela e-hydroxypropyl kwi-molecule ye-starch.
   • Isitatshi yipolysaccharide eyenziwe ngeeyunithi zeglucose ezidityaniswe kunye neebhondi ze-glycosidic. I-Hydroxypropylation ibandakanya ukutshintshwa kwamaqela e-hydroxyl (-OH) kwi-molecule ye-starch kunye namaqela e-hydroxypropyl (-CH2CHOHCH3).
2. I-Hydroxypropyl Methyl Cellulose (HPMC):
   • I-HPMC yi-ether ye-cellulose elungisiweyo efunyenwe ngokwazisa omabini amaqela e-hydroxypropyl kunye ne-methyl kwi-molecule ye-cellulose.
   • I-Cellulose yi-polysaccharide eyenziwe ngeeyunithi ze-glucose ezidityaniswe kunye nge-β(1→4) iibhondi ze-glycosidic. I-Hydroxypropylation yazisa amaqela e-hydroxypropyl (-CH2CHOHCH3), ngelixa i-methylation izisa amaqela e-methyl (-CH3) kwi-cellulose backbone.

Iinkcazelo ngeempawu:

1. Ukunyibilika:
   • Isitashi seHydroxypropyl siqhele ukunyibilika kumanzi ashushu kodwa sinokubonisa ukunyibilika okulinganiselweyo kumanzi abandayo.
   • I-HPMC iyanyibilika emanzini abandayo kunye nashushu, yenza izisombululo ezicacileyo, ezibonakala. Ukunyibilika kwe-HPMC kuxhomekeke kwiqondo lokuthatha indawo (DS) kunye nobunzima bemolekyuli bepolymer.
2. Viscosity:
   • Isitashi seHydroxypropyl sinokubonisa iipropati zokuphucula i-viscosity, kodwa i-viscosity yayo iphantsi ngokubanzi xa ithelekiswa ne-HPMC.
   • I-HPMC yaziwa ngokugqwesa kwayo okugqwesileyo kunye neempawu zokuguqula i-viscosity. I-viscosity yezisombululo ze-HPMC inokulungelelaniswa ngokutshintsha i-polymer concentration, i-DS, kunye nobunzima bemolekyuli.

Usetyenziso:

1. Ukutya kunye naMayeza:
   • Isitashi seHydroxypropyl siqhele ukusetyenziswa njenge-thickener, stabilizer, kunye ne-gelling agent kwiimveliso zokutya ezifana neesuphu, iisosi, kunye nezimuncumuncu. Isenokusetyenziswa nakwimixube yamayeza.
   • I-HPMC isetyenziswa kakhulu ekutyeni, kumayeza, nakwizithambiso njenge-thickener, emulsifier, stabilizer, ifilimu yangaphambili, kunye ne-arhente ekhutshwayo elawulwayo. Ngokuqhelekileyo ifumaneka kwiimveliso ezifana neepilisi, i-ointments, i-creams, kunye nezinto zokunyamekela.
2. Izixhobo zokwakha kunye nezixhobo zokwakha:
   • I-HPMC isetyenziswa kakhulu kushishino lolwakhiwo njengesongezo kwiimveliso ezisekwe kwisamente ezifana nokuncamathelisa iithayile, udaka, unikezelo, kunye nesamente. Ibonelela ngokugcinwa kwamanzi, ukusebenza, ukubambelela, kunye nokusebenza okuphuculweyo kwezi zicelo.

Isiphelo:

Ngelixa zombini isitashi se-hydroxypropyl kunye ne-HPMC ziguqulwe iipolysaccharides ezinemisebenzi efanayo, zinezakhiwo zeekhemikhali ezahlukeneyo, iipropathi, kunye nokusetyenziswa. Isitashi seHydroxypropyl sisetyenziswa ikakhulu ekutyeni nakwizicelo zamayeza, ngelixa i-HPMC ifumana ukusetyenziswa kakhulu ekutyeni, kumayeza, kwizinto zokuthambisa, nakwizinto zokwakha. Ukhetho phakathi kwe-hydroxypropyl starch kunye ne-HPMC kuxhomekeke kwiimfuno ezithile zesicelo esijoliswe kuyo.