Tom qab ntxiv hydroxypropyl methylcelulose rau cov ntawv tso cai, nws tuaj yeem tuab. Tus nqi ntawm hydroxypropylulose txiav txim siab cov dej uas yuav tsum tau txais cov khoom siv Maas-based, yog li nws yuav cuam tshuam rau cov zis ntawm cug.
Ntau yam cuam tshuam rau cov viscosity ntawm hydroxypropyl methylulose:
1. Cov qib siab dua ntawm polymerization ntawm cellulose ntawm cov leeg, thiab qhov kev tawm tsam ntau dua ntawm cov kua aqueous;
2. Qhov siab dua ntawm kev nkag tau (lossis kev xav tau) ntawm cellulose ether, ntau hom viscosity ntawm nws cov kua aqueous. Txawm li cas los xij, nws yog ib qho tsim nyog kom them sai sai rau xaiv cov kev nkag tau kom tsim nyog thaum siv tau cov kev ua haujlwm ntau dhau, uas yuav cuam tshuam rau kev ua haujlwm cug thiab pob zeb. tus yam ntxwv;
3. Zoo li cov kua dej feem ntau, cov viscosity ntawm cellulose ntawm cellule tov yuav txo qis nrog qhov nce thiab ntau dua ntawm cellulose ether, qhov ntau dua ntawm cov kub ntawm kub;
4. HydroxyPropylenClcellulose kev daws teeb meem feem ntau yog pseudophu, uas muaj cov cuab yeej ntawm shear thinning. Qhov ntau dua cov shear tus nqi thaum ntsuas, qis dua viscosity.
Yog li ntawd, cov cohesion ntawm cug yuav txo qis vim txoj kev quab yuam sab nraud, uas tau txais txiaj ntsig zoo rau kev tshuaj khib, ua rau muaj kev sib xyaw ua ke thiab cohesion ntawm lub tshuaj khib nyob rau tib lub sijhawm.
Lub hydroxypropyl methylulose tshuaj yuav qhia cov yam ntxwv kua mis tshiab thaum lub siab yog tsawg thiab viscosity yog tsawg. Thaum cov kev daws teeb meem zuj zus, kev daws teeb meem yuav maj mam ua kom pom cov yam ntxwv zoo pseudoplastic kua cov yam ntxwv, thiab ntau pom tseeb ntawm pseudoplastic.
Lub Sijhawm Post: Jan-28-2023