Momwe Mungasankhire hydroxypropyl methylcellulose?

Kodi pali kusiyana kotanihydroxypropyl methylcellulose(HPMC) ndi kapena popanda S?

1. HPMC lagawidwa mu mtundu yomweyo ndi mtundu mofulumira kubalalitsidwa

HPMC mofulumira dispersing mtundu suffixed ndi chilembo S. Panthawi yopanga, glyoxal ayenera kuwonjezeredwa.

HPMC yomweyo mtundu sawonjezera zilembo, monga "100000" ndi "100000 mamasukidwe akayendedwe mofulumira kupezeka mtundu HPMC".

2. Ndi kapena popanda S, makhalidwe ndi osiyana

Mofulumira kubalalitsa HPMC imabalalitsa mwachangu m'madzi ozizira ndikuzimiririka m'madzi.Panthawiyi, madziwa alibe mamasukidwe akayendedwe, chifukwa HPMC amangomwazikana m'madzi, ndipo palibe kuvunda kwenikweni.Pambuyo pa mphindi ziwiri, kukhuthala kwamadzimadzi kumawonjezeka pang'onopang'ono, ndikupanga madzi omata.Colloid wandiweyani.

Instant HPMC imatha kubalalika mwachangu m'madzi otentha pafupifupi 70°C.Kutentha kumatsika mpaka kutentha kwina, kukhuthala kumawonekera pang'onopang'ono mpaka mawonekedwe a viscous colloid apangidwa.

3. Ndi kapena popanda S, cholinga ndi chosiyana

Instant HPMC ikhoza kugwiritsidwa ntchito mu putty powder ndi matope.Mu zomatira zamadzimadzi, zokutira ndi zinthu zoyeretsera, clumping idzachitika ndipo sungagwiritsidwe ntchito.

Mofulumira kubalalitsa HPMC ali osiyanasiyana ntchito.Itha kugwiritsidwa ntchito mu putty powder, matope, guluu wamadzimadzi, utoto, ndi zinthu zotsuka popanda zotsutsana.

Njira yothetsera

1. Tengani madzi otentha ofunikira, muyike mu chidebe ndikuwotchera pamwamba pa 80 ° C, ndipo pang'onopang'ono yonjezerani mankhwalawa poyambitsa pang'onopang'ono.Ma cellulose amayandama pamadzi poyamba, koma amamwazikana pang'onopang'ono kupanga matope ofanana.Kuziziritsa njira ndi oyambitsa.

2. Kapena kutentha 1/3 kapena 2/3 ya madzi otentha pamwamba pa 85 ° C, onjezani mapadi kuti mupeze slurry ya madzi otentha, kenaka yikani madzi otsala otsala, pitirizani kuyambitsa, ndi kuziziritsa kusakaniza kotsatira.

3. Ma cellulose ali ndi nambala yabwino kwambiri ya mauna, ndipo amakhala ngati tinthu tating'ono tating'ono mu ufa wosakanikirana, ndipo amasungunuka mwachangu akakumana ndi madzi kuti apange mamasukidwe ofunikira.

4. Onjezani cellulose pang'onopang'ono komanso mofanana kutentha kwa firiji, ndipo pitirizani kusonkhezera panthawi yowonjezera mpaka yankho lowonekera lipangidwa.

Kodi ndi zinthu ziti zomwe zimakhudza kusungidwa kwa madzi kwa hydroxypropyl methylcellulose?

Kusungidwa kwa madzi kwa mankhwala a hydroxypropyl methylcellulose HPMC pawokha kumakhudzidwa ndi izi:

1. Ma cellulose ether HPMC homogeneity

HPMC yogwirizana mofanana ili ndi kugawa kofanana kwa magulu a methoxy ndi hydroxypropoxy ndi kusunga madzi kwakukulu.

2. Selulosi etha HPMC kutentha gel osakaniza kutentha

Kutentha kwa gel osakaniza kumapangitsa kuti madzi asapitirire;apo ayi, m'munsimu mlingo wosungira madzi.

3. Ma cellulose ether HPMC mamasukidwe akayendedwe

Pamene mamasukidwe akayendedwe a HPMC akuwonjezeka, kuchuluka kwa madzi osungirako kumawonjezekanso;pamene mamasukidwe akayendedwe afika pa mlingo winawake, kuwonjezeka kwa mlingo wosungira madzi kumakhala kofatsa.

Cellulose ether HPMC kuchuluka kwa kuchuluka

Kuchulukirachulukira kwa cellulose ether HPMC kumapangitsa kuti madzi asungidwe komanso kuti madzi asungidwe bwino.

Pakati pa 0.25-0.6%, kuchuluka kwa madzi osungira madzi kumawonjezeka mofulumira ndi kuwonjezeka kwa ndalama zowonjezera;pamene kuchuluka kwa ndalama kumawonjezeka, kuwonjezeka kwa madzi osungira madzi kumakhala pang'onopang'ono.