1. I-HPMC ihlukaniswe yaba uhlobo olusheshayo kanye nohlobo lokuhlakazeka okusheshayo
Uhlobo lokuhlakazeka okusheshayo lwe-HPMC lufakwe uhlamvu S, futhi i-glyoxal kufanele yengezwe ngesikhathi senqubo yokukhiqiza.
Uhlobo olusheshayo lwe-HPMC alungezi noma yiziphi izinhlamvu, njengokuthi “100000″ kusho ukuthi “100000 viscosity fast dispersion type HPMC”.
2. Nge-S noma ngaphandle kwayo, izici zihlukile
I-HPMC ehlakazeke ngokushesha ihlakazeka ngokushesha lapho ihlangana namanzi abandayo bese inyamalala emanzini. Ngalesi sikhathi, uketshezi alunayo i-viscosity, ngoba i-HPMC ihlakazeka emanzini ngaphandle kokuhlakazeka kwangempela. Ngemva kwemizuzu engaba mibili, i-viscosity yoketshezi ikhula kancane kancane, yakha i-viscous esobala e-Thick colloid.
I-HPMC esheshayo ingahlakazwa ngokushesha emanzini ashisayo cishe ku-70°C. Lapho izinga lokushisa lehla lifinyelela ezingeni elithile lokushisa, i-viscosity izovela kancane kuze kube yilapho i-viscous colloid esobala yakheka.
3. Nge-S noma ngaphandle kwayo, inhloso ihlukile
I-HPMC esheshayo ingasetshenziswa kuphela ku-putty powder nodaka. Ku-glue ye-liquid, upende kanye nemikhiqizo yokuwasha, kuzoba ne-grouping phenomenon futhi ayikwazi ukusetshenziswa.
I-HPMC ehlakazeke ngokushesha inezinhlobonhlobo zezinhlelo zokusebenza futhi ingasetshenziswa ku-putty powder, udaka, iglue ewuketshezi, upende, nemikhiqizo yokuwasha ngaphandle kokungqubuzana.
Indlela yokuqedwa
1. Thatha inani elidingekayo lamanzi ashisayo, ulifake esitsheni bese ushisa ngaphezu kuka-80 ° C, futhi kancane kancane wengeze lo mkhiqizo ngaphansi kokuvuselela kancane. I-cellulose intanta phezu kwamanzi ekuqaleni, kodwa kancane kancane ihlakazeka ukuze yenze udaka olufanayo. Isixazululo sipholile ngenkathi sinyakaza.
2. Ngaphandle kwalokho, shisa i-1/3 noma i-2/3 yamanzi ashisayo ibe ngaphezu kuka-85 ° C, engeza i-cellulose ukuze uthole i-slurry yamanzi ashisayo, bese ufaka inani elisele lamanzi abandayo, qhubeka uvuselela, futhi upholise ingxube ewumphumela.
3. Imeshi ye-cellulose ilungile uma kuqhathaniswa, futhi ikhona njengezinhlayiyana ezincane kumpushana ogoqiwe ngokulinganayo, futhi incibilika ngokushesha lapho ihlangana namanzi ukuze yakhe i-viscosity edingekayo.
4. Kancane kancane futhi ngokulinganayo wengeze i-cellulose ekamelweni lokushisa, uvuselela ngokuqhubekayo kuze kube yilapho kwakhiwa isisombululo esibonakalayo.
Yiziphi izici ezithinta ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose?
Ukugcinwa kwamanzi komkhiqizo we-hydroxypropyl methylcellulose HPMC ngokwawo kuvame ukuthintwa yizinto ezilandelayo:
1. Ukufana kwe-cellulose ether HPMC
I-HPMC esabela ngokulinganayo, i-methoxyl ne-hydroxypropoxyl isatshalaliswa ngokulinganayo, futhi izinga lokugcinwa kwamanzi liphezulu.
2. Izinga lokushisa elishisayo le-gelation ye-cellulose ether HPMC
Lapho izinga lokushisa lejeli elishisayo liphakeme, izinga lokugcinwa kwamanzi liphakeme; uma kungenjalo, izinga lokugcinwa kwamanzi liphansi.
3. I-Cellulose ether HPMC viscosity
Lapho i-viscosity ye-HPMC ikhula, izinga lokugcinwa kwamanzi liyanda; lapho i-viscosity ifinyelela ezingeni elithile, ukwanda kwezinga lokugcinwa kwamanzi kuvame ukuba flat.
Inani elingeziwe le-cellulose ether HPMC
Uma likhulu inani le-cellulose ether HPMC engeziwe, izinga lokugcinwa kwamanzi liyakhuphuka kanye nomphumela wokugcina amanzi ube ngcono.
Ebangeni lokuhlanganisa okungu-0.25-0.6%, izinga lokugcinwa kwamanzi likhuphuka ngokushesha ngokunyuka kwenani elingeziwe; lapho inani elingeziwe likhuphuka, inkambiso yokwenyuka kwezinga lokugcina amanzi iyancipha.
Isikhathi sokuthumela: Nov-17-2022