Inkomba ye-viscosity yei-hydroxypropyl methylcellulosekuyinkomba ebaluleke kakhulu. I-viscosity ayimeleli ubumsulwa. I-viscosity ye-cellulose HPMC incike enqubweni yokukhiqiza. Izindawo ezahlukene zokusebenzisa kufanele zikhethe i-cellulose HPMC ene-viscosities ehlukene, hhayi i-viscosity ephezulu ye-cellulose HPMC, kungcono! Okulungile kulungile √
Ukulawula Ukuthamba
1. I-hydroxypropyl methylcellulose ene-viscosity ephezulu ayikwazi ukukhiqiza i-cellulose ephezulu kakhulu ngokuyihlanza nge-vacuum bese ifakwa esikhundleni sayo nge-nitrogen. Ngokuvamile, ukukhiqizwa kwe-cellulose ene-viscosity ephezulu eShayina akunakulawulwa. Kodwa-ke, uma ithuluzi lokulinganisa i-oxygen encane lingafakwa eketheni, ukukhiqizwa kwe-viscosity kungalawulwa ngokwenziwa.
Ukusetshenziswa kwama-associative agents
2. Ngaphezu kwalokho, uma ucabangela ijubane lokufaka esikhundleni i-nitrogen, futhi ngesikhathi esifanayo, kulula kakhulu ukukhiqiza imikhiqizo ene-viscosity ephezulu kungakhathaliseki ukuthi uhlelo lungena umoya kangakanani. Yiqiniso, izinga le-polymerization yekotini elicwengisisiwe nalo libalulekile. Uma lokho kungasebenzi, kwenze ngokuhlanganisa i-hydrophobic. Kukhona ama-associative agents asekhaya kulokhu. Uhlobo luni lwe-associative agent olukhethiwe lunethonya elikhulu ekusebenzeni komkhiqizo wokugcina.
Okuqukethwe kwe-Hydroxypropyl
3. I-oxygen esele ku-reactor iholela ekuwohlokeni kwe-cellulose kanye nokwehla kwesisindo sama-molecule, kodwa i-oxygen esele ilinganiselwe. Akunzima ukwenza i-viscosity ephezulu uma nje ama-molecule aphukile exhunywe kabusha. Kodwa-ke, izinga lokugcwala kwamanzi lihlobene kakhulu nokuqukethwe kwe-hydroxypropyl. Amanye amafektri afuna ukunciphisa izindleko nentengo kuphela, futhi awafuni ukwandisa okuqukethwe kwe-hydroxypropyl, ngakho ikhwalithi ayikwazi ukufinyelela ezingeni lemikhiqizo efanayo yangaphandle.
ezinye izinto
4. Izinga lokugcina amanzi lomkhiqizo linobudlelwano obuhle ne-hydroxypropyl, kodwa kuyo yonke inqubo yokusabela, liphinde linqume izinga lokugcina amanzi, umphumela we-alkaliization, isilinganiso se-methyl chloride ne-propylene oxide, kanye nokuhlushwa kwe-alkali. Futhi isilinganiso samanzi nekotini elicwengekile sinquma ukusebenza komkhiqizo.
Isikhathi sokuthunyelwe: Okthoba-19-2022