Kedu ihe ndị na-emetụta ịdị ọcha nke hydroxypropyl methyl cellulose?

N'ime ihe mkpuchi mkpuchi ụlọ na ntụ ntụ, nha hydroxypropyl methylcellulose dị ọcha na-emetụta àgwà nke ihe owuwu injinia, yabụ kedu ihe ndị na-emetụta ịdị ọcha nke hydroxypropyl methylcellulose? Iji nyere gị aka ịza ajụjụ a taa.

N'ime usoro mmepụta nke hydroxypropyl methylcellulose, ikuku oxygen nke fọdụrụ na kettle mmeghachi omume ga-eduga ná mmebi nke hydroxypropyl methylcellulose ma belata ibu molekụla. Otú ọ dị, ikuku oxygen fọdụrụnụ nwere oke, n'ihi ya, ọ naghị esiri ike itinyeghachi ụmụ irighiri ihe ndị ahụ gbajiri agbaji. Ọnụ ọgụgụ isi saturation na ọdịnaya hydroxypropyl nwere mmekọrịta dị ukwuu, ụfọdụ ụlọ ọrụ na-achọ naanị ibelata ọnụ ahịa na ọnụahịa, achọghị imeziwanye ọdịnaya nke hydroxypropyl, yabụ àgwà enweghị ike iru ọkwa nke ngwaahịa mba ọzọ yiri ya.

Ọnụego njide mmiri nke hydroxypropyl methylcellulose na hydroxypropyl nwekwara mmekọrịta dị ukwuu, na maka usoro mmeghachi omume dum, hydroxypropyl methylcellulose na-ekpebikwa njigide mmiri nke hydroxypropyl methylcellulose. Mmetụta nke alkalization, oke nke chloromethane na propylene oxide, ntinye nke alkali na oke mmiri na owu a nụchara anụcha niile na-ekpebi arụmọrụ nke ngwaahịa ahụ.

The àgwà nke akụrụngwa, alkalization mmetụta, usoro ratio akara, ihe mgbaze ruru na neutralization mmetụta, niile na-ekpebi àgwà nke hydroxypropyl methyl cellulose, ụfọdụ hydroxypropyl methyl cellulose mere ka igbari mgbe dị ka mmiri ara ehi bụ nnọọ urukpuru, ụfọdụ milky ọcha, ụfọdụ odo, ụfọdụ doro anya na nghọta. Ọ bụrụ na ịchọrọ idozi ya, gbanwee site na isi ihe ndị dị n'elu. Mgbe ụfọdụ acetic acid nwere ike imetụta transmittance nke ukwuu, acetic acid na-kacha mma na-eji mgbe dilution, nnukwu mmetụta ma ọ bụ mmeghachi omume na-akpali bụ edo, usoro ruru kwụsiri ike (ụfọdụ ihe mmiri mmiri, ọdịnaya adịghị ike, dị ka mgbake nke ihe mgbaze). n'ezie, ọtụtụ ihe na-emetụta. Site na nkwụsi ike nke ngwá ọrụ na ọrụ nke ndị na-arụ ọrụ a zụrụ azụ, ngwaahịa ndị a na-emepụta kwesịrị ịdị nnọọ mma. Mbufe ahụ ekwesịghị ịfe ± 2%, yana ngbanwe edo edo nke otu nọchiri anya kwesịrị ịchịkwa nke ọma. Ndochi n'ụdị, nnyefe ga-adị mma.

Ya mere, a na-ekpebi ịdị mma ngwaahịa site na akụrụngwa, teknụzụ mmepụta na ihe ndị ọzọ. Naanị njikwa siri ike site n'otu njedebe ruo na njedebe nwere ike ịmepụta ngwaahịa nwere àgwà kwụsiri ike.