Yiziphi izinto zokusetshenziswa eziyinhloko ze-hydroxypropyl methylcellulose (HPMC)?

IHydroxypropylmethylcellulose (HPMC) iphuma ku-cellulose esetshenziswa kabanzi ezimbonini ezahlukahlukene.Ukusetshenziswa okuyinhloko kwe-HPMC njengama-thieners, stabilizers nama-emulsifiers ezimbonini zokudla, ezemithi nezimonyo.I-HPMC iphinde isetshenziswe emkhakheni wezokwakha njengesengezo sikasimende, njengendawo yokumboza amaphilisi namaphilisi, nanjengesixazululo se-ophthalmic.Izinto zokusetshenziswa eziyinhloko ze-HPMC yi-cellulose nama-reagents amakhemikhali.

I-Cellulose:

I-Cellulose iyimpahla eyinhloko yokukhiqizwa kwe-HPMC.I-Cellulose iyi-polymer yemvelo etholakala ezindongeni zamaseli ezitshalo futhi iyi-polymer yemvelo eningi kakhulu eMhlabeni.Izakhiwo zamakhemikhali ze-cellulose zifana ne-HPMC, okwenza kube impahla eluhlaza efanelekile yokukhiqizwa kwe-HPMC.I-cellulose itholakala emithonjeni ehlukahlukene, kuhlanganise nokhuni, ukotini, nezitshalo ezihlukahlukene.

Umthombo ovame kakhulu we-cellulose osetshenziselwa ukukhiqizwa kwe-HPMC i-pulp yokhuni.I-Wood pulp itholakala ezinkuni ezithambile ezifana ne-spruce, i-pine ne-fir.I-Wood pulp iphathwa ngamakhemikhali ukuze iphule i-lignin ne-hemicellulose, ishiye i-cellulose ehlanzekile.I-cellulose ehlanzekile ibe i-bleached futhi igezwe ukuze kukhishwe noma yikuphi ukungcola.

I-Cellulose esetshenziselwa ukukhiqizwa kwe-HPMC kufanele ibe sezingeni eliphezulu futhi izinyathelo eziqinile zokulawula izinga kufanele zilandelwe ukuze kuqinisekiswe ukuhlanzeka kwe-cellulose.Ukuhlanzeka kwe-cellulose kubalulekile njengoba ukungcola kungathinta izakhiwo zomkhiqizo wokugcina.

Ama-reagents amakhemikhali:

Ukukhiqizwa kwe-HPMC kudinga ukusetshenziswa kwama-reagents amakhemikhali ahlukahlukene.Amakhemikhali asetshenziswa ekukhiqizeni i-HPMC ahlanganisa i-propylene oxide, i-methyl chloride, i-sodium hydroxide, i-hydrochloric acid, njll.

I-Propylene oxide isetshenziselwa ukukhiqiza i-hydroxypropyl cellulose (HPC), ebese isabela nge-methyl chloride ukukhiqiza i-HPMC.I-HPC isabela nge-methyl chloride ukuze imiselele amanye amaqembu e-hydroxyl ochungechungeni lwe-cellulose ngamaqembu e-methoxy kanye ne-hydroxypropyl, ngaleyo ndlela yakhe i-HPMC.

I-sodium hydroxide isetshenziswa ekukhiqizeni i-HPMC ukuze kwandiswe inani le-pH lesixazululo sokuphendula ukusiza ukuncibilikisa i-cellulose.

Phakathi nenqubo yokukhiqiza ye-HPMC, i-hydrochloric acid isetshenziselwa ukulungisa inani le-pH lesisombululo sokusabela.

Ama-reagents amakhemikhali asetshenziswa ekukhiqizweni kwe-HPMC kufanele abe nobumsulwa obukhulu, futhi izimo zokusabela kufanele zilawulwe ngokucophelela ukuze kuqinisekiswe ikhwalithi yomkhiqizo wokugcina.

Ekuphetheni:

Izinto zokusetshenziswa eziyinhloko ze-HPMC yi-cellulose nama-reagents amakhemikhali.I-Cellulose, etholakala emithonjeni eyahlukene okuhlanganisa ukhuni, ukotini, nezitshalo ezihlukahlukene, iwumthombo oyinhloko wokukhiqizwa kwe-HPMC.Ama-chemical reagent asetshenziswa ekukhiqizweni kwe-HPMC afaka i-propylene oxide, i-methyl chloride, i-sodium hydroxide ne-hydrochloric acid.Ukukhiqizwa kwe-HPMC kudinga izinyathelo eziqinile zokulawula ikhwalithi ukuze kuqinisekiswe ukuhlanzeka kwezinto ezingavuthiwe kanye nekhwalithi yomkhiqizo wokugcina.I-HPMC isetshenziswa kabanzi ezimbonini ezahlukahlukene futhi inezinhlelo eziningi ezahlukahlukene ngenxa yezakhiwo zayo ezihlukile.