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

I-Hydroxypropyl starch kunye ne-hydroxypropyl methyl cellulose (HPMC) zombini zi-polysaccharides eziguquliweyo ezisetyenziswa kumashishini ahlukeneyo, kuquka 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 se-Hydroxypropyl 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. Izinto 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.