Uyini umehluko we-HPMC nge-S noma ngaphandle kwayo?

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 Thick colloid esobala.

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 inohlelo olubanzi lwezinhlelo zokusebenza futhi ingasetshenziswa ku-putty powder, udaka, iglue ewuketshezi, upende, nemikhiqizo yokuwasha ngaphandle kokuphikiswa.

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 inhle kakhulu, futhi ikhona njengezinhlayiya 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.