Ungayikhetha Kanjani i-hydroxypropyl methylcellulose?

Uyini umehluko phakathii-hydroxypropyl methylcellulose(HPMC) ene-S noma engenayo?

1. I-HPMC ihlukaniswe ngohlobo olusheshayo kanye nohlobo lokuhlakazeka okusheshayo

Uhlobo lokuhlakazeka okusheshayo lwe-HPMC lune-suffixed ngohlamvu u-S. Ngesikhathi senqubo yokukhiqiza, kufanele kufakwe i-glyoxal.

Uhlobo olusheshayo lwe-HPMC alufaki noma yiziphi izinhlamvu, njengokuthi “100000″ luyi-“100000 viscosity fast dispersion type HPMC”.

2. Uma kukhona noma kungekho S, izici zihlukile

I-HPMC ehlakazeka ngokushesha ihlakazeka ngokushesha emanzini abandayo bese inyamalala emanzini. Ngalesi sikhathi, uketshezi alunawo umswakama, ngoba i-HPMC ihlakazeka emanzini kuphela, futhi akukho ukuncibilika kwangempela. Ngemva kwemizuzu engaba mibili, umswakama woketshezi uyanda kancane kancane, wakhe uketshezi olunamathelayo olubonakalayo. I-colloid ejiyile.

I-HPMC esheshayo ingasakazeka ngokushesha emanzini ashisayo cishe ku-70°C. Lapho izinga lokushisa lehla liye ezingeni lokushisa elithile, i-viscosity ibonakala kancane kancane kuze kube yilapho kwakheka i-colloid ecacile egobile.

3. Uma une-S noma ungenayo, injongo ihlukile

I-HPMC esheshayo ingasetshenziswa kuphela ku-putty powder kanye nodaka. Ezintweni zokunamathisela eziwuketshezi, ezimbozweni nasezintweni zokuhlanza, kuzovela ukugoqana futhi akukwazi ukusetshenziswa.

I-HPMC ehlakazeka ngokushesha inezindlela eziningi zokusebenzisa. Ingasetshenziswa ku-putty powder, udoti, i-glue ewuketshezi, upende, kanye nemikhiqizo yokuwasha ngaphandle kokuphikisana.

Indlela yokuncibilikisa

1. Thatha inani elidingekayo lamanzi ashisayo, uwafake esitsheni bese uwafudumeza ngaphezu kuka-80°C, bese ufaka kancane kancane lo mkhiqizo ngaphansi kokuxubha kancane. I-cellulose iyantanta emanzini ekuqaleni, kodwa kancane kancane ihlakazeka ukuze yakhe i-slurry efanayo. Pholisa isixazululo ngokuxubha.

2. Noma fudumeza ingxenye yesithathu noma ingxenye yesithathu yamanzi ashisayo ibe ngaphezu kwama-85°C, engeza i-cellulose ukuze uthole i-slurry yamanzi ashisayo, bese ufaka inani elisele lamanzi abandayo, qhubeka uvuselela, bese upholisa ingxube ephumayo.

3. I-Cellulose inenombolo encane ye-mesh, futhi ikhona njengenhlayiya encane eyodwa ku-powder evuselelwe ngokulinganayo, futhi iyancibilika ngokushesha lapho ihlangana namanzi ukuze yakhe i-viscosity edingekayo.

4. Faka i-cellulose kancane kancane nangokulinganayo ekushiseni kwegumbi, bese uqhubeka nokuvuselela ngesikhathi senqubo yokwengeza kuze kube yilapho kwakheka isixazululo esibonakalayo.

Yiziphi izici ezithinta ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose?

Ukugcinwa kwamanzi komkhiqizo we-hydroxypropyl methylcellulose HPMC uqobo kuvame ukuthintwa yizici ezilandelayo:

1. Ukulingana kwe-cellulose ether HPMC

I-HPMC esabela ngendlela efanayo inokusatshalaliswa okufanayo kwamaqembu e-methoxy kanye ne-hydroxypropoxy kanye nokugcinwa kwamanzi okuphezulu.

2. Ukushisa kwejeli lokushisa le-cellulose ether HPMC

Uma izinga lokushisa lejeli lokushisa liphezulu, izinga lokugcina amanzi liphezulu; uma kungenjalo, izinga lokugcina amanzi liphansi.

3. I-ether ye-cellulose HPMC viscosity

Uma i-viscosity ye-HPMC ikhula, izinga lokugcina amanzi nalo liyakhula; lapho i-viscosity ifinyelela ezingeni elithile, ukwanda kwesilinganiso sokugcina amanzi kuvame ukuba mnene.

Inani lokwengeza le-HPMC le-cellulose ether

Uma inani elingeziwe le-cellulose ether HPMC lilikhulu, izinga lokugcina amanzi liyanda futhi umphumela wokugcina amanzi uba ngcono.

Ebangeni elingu-0.25-0.6%, izinga lokugcina amanzi likhula ngokushesha ngokukhuphuka kwenani lokwengeza; lapho inani lokwengeza likhula ngokwengeziwe, ukuthambekela okwandayo kwesilinganiso sokugcina amanzi kuba kancane.