Inkomba ye-viscosity ye-hydroxypropyl methylcellulose iyinkomba ebaluleke kakhulu. I-viscosity akumeleli ubumsulwa. I-viscosity ye-cellulose HPMC incike kunqubo yokukhiqiza. Izindawo ezihlukene zokusebenzisa kufanele zikhethe i-cellulose HPMC ene-viscosity ehlukene, hhayi ukuphakama kwe-viscosity ye-cellulose HPMC, kungcono! Okulungile kulungile!
1. Ukulawulwa kwe-viscosity
I-high-viscosity i-hydroxypropyl methylcellulose ayikwazi ukukhiqiza i-cellulose ephezulu kakhulu kuphela ngokufaka i-vacuum kanye nokushintshwa kwe-nitrogen ekukhiqizeni. Ngokuvamile, ukukhiqizwa kwe-cellulose ephezulu-viscosity e-China akukwazi ukulawulwa. Kodwa-ke, uma imitha ye-oxygen yokulandelela ingafakwa ku-kettle, ukukhiqizwa kwe-viscosity yayo kungalawulwa ngokwenziwa.
2. Ukusetshenziswa kwe-ejenti yenhlangano
Ngaphezu kwalokho, uma kucatshangelwa isivinini sokushintsha i-nitrogen, kulula ukukhiqiza imikhiqizo ene-viscosity ephezulu kungakhathaliseki ukuthi uhlelo lunomoya ongakanani. Vele, izinga le-polymerization likakotini ocolisisiwe nalo libalulekile. Uma lokho kungasebenzi, kwenze nge-hydrophobic association. Kukhona ama-agent enhlangano kule ndawo e-China. Hlobo luni lwe-ejenti yenhlangano okufanele uyikhethe enethonya elikhulu ekusebenzeni komkhiqizo wokugcina.
3. Okuqukethwe kwe-Hydroxypropyl
I-oksijeni esele ku-reactor ibangela ukuwohloka kwe-cellulose nokuncipha kwesisindo samangqamuzana, kodwa i-oksijeni esele ilinganiselwe, inqobo nje uma ama-molecule aphukile exhunywa kabusha, akunzima ukwenza i-viscosity ephezulu. Kodwa-ke, izinga lokugcwala lihlobene kakhulu nokuqukethwe kwe-hydroxypropyl. Ezinye izimboni zifuna kuphela ukunciphisa izindleko nentengo, kodwa azizimisele ukwandisa okuqukethwe kwe-hydroxypropyl, ngakho ikhwalithi ayikwazi ukufinyelela izinga lemikhiqizo efanayo yangaphandle.
4. Ezinye izici
Izinga lokugcinwa kwamanzi lomkhiqizo linobudlelwane obuhle ne-hydroxypropyl, kodwa kuyo yonke inqubo yokusabela, liphinde linqume izinga lokugcinwa kwamanzi, umphumela we-alkalization, isilinganiso se-methyl chloride ne-propylene oxide, ukugxila kwe-alkali nokugcinwa kwamanzi. Isilinganiso ukotini ocolisisiwe sinquma ukusebenza komkhiqizo.
Isikhathi sokuthumela: Apr-04-2023