Hydroxypropyl methyl cellulose, koj puas paub?

1.HPMCyog muab faib ua hom tam sim ntawd thiab hom dispersion ceev.

Hom HPMC dispersion ceev yog tom qab nrog tsab ntawv S, thiab glyoxal yuav tsum tau ntxiv thaum lub sijhawm tsim khoom.

HPMC hom tam sim ntawd tsis ntxiv cov ntawv, xws li "100000" txhais tau tias "100000 viscosity."

2. Nrog lossis tsis muaj S, cov yam ntxwv txawv

HPMC uas tawg sai sai thaum nws ntsib dej txias nws tawg sai sai thiab ploj mus rau hauv dej. Lub sijhawm no, cov kua tsis muaj viscosity, vim tias HPMC tsuas yog tawg hauv dej yam tsis muaj kev yaj tiag tiag. Tom qab li ob feeb, qhov viscosity ntawm cov kua maj mam nce, tsim cov pob tshab viscous Tuab colloid.

HPMC tam sim ntawd tuaj yeem tawg sai sai hauv dej kub ntawm li 70 ° C. Thaum qhov kub poob rau qee qhov kub, qhov viscosity yuav tshwm sim qeeb qeeb kom txog thaum muaj cov pob tshab viscous colloid.

3. Muaj lossis tsis muaj S, lub hom phiaj txawv

HPMC tam sim ntawd tsuas yog siv tau rau hauv cov hmoov putty thiab mortar. Hauv cov kua nplaum, xim thiab cov khoom ntxuav, yuav muaj cov xwm txheej sib sau ua ke thiab siv tsis tau.

Sai sai tawg ua tej daim me meHPMCmuaj ntau yam kev siv thiab siv tau rau hauv hmoov putty, mortar, kua nplaum, xim, thiab cov khoom ntxuav tsis muaj kev tsis sib haum xeeb.

4. Txoj kev yaj

4-1. Muab dej kub raws li qhov koj xav tau, muab tso rau hauv lub thawv thiab ua kom sov txog li 80°C, thiab maj mam ntxiv cov khoom no rau hauv qab kev sib xyaw qeeb qeeb. Thaum xub thawj, cov cellulose ntab rau ntawm qhov dej, tab sis maj mam sib xyaw ua ke ua cov slurry sib xws. Cov tshuaj tau txias thaum sib xyaw.

4-2. Los yog, ua kom 1/3 lossis 2/3 ntawm cov dej kub kub txog li 85°C, ntxiv cov cellulose kom tau cov dej kub, tom qab ntawd ntxiv cov dej txias seem, txuas ntxiv do, thiab txias cov khoom sib tov.

4-3. Lub mesh ntawm cellulose yog qhov zoo heev, thiab nws muaj nyob ua cov khoom me me hauv cov hmoov sib xyaw sib npaug, thiab nws yaj sai sai thaum nws ntsib dej los tsim cov viscosity xav tau.

4-4. Maj mam thiab sib npaug ntxiv cov cellulose rau ntawm chav tsev kub, thiab txuas ntxiv do kom txog thaum cov kua pob tshab tshwm sim.

5. Muaj tej yam dab tsi cuam tshuam rau qhov khaws dej ntawm hydroxypropyl methyl cellulose?

5-1. Cellulose ether HPMC homogeneity

Cov tshuaj HPMC, methoxyl thiab hydroxypropoxyl sib npaug zos tau faib tawm, thiab tus nqi khaws dej siab.

5-2. Cellulose ether HPMC thermal gel kub

Qhov kub ntawm cov thermal gel siab dua, qhov ceev ntawm kev khaws dej siab dua; txwv tsis pub, qhov ceev ntawm kev khaws dej qis dua.

5-3. Cellulose Ether HPMC Viscosity

Thaum qhov viscosity ntawm HPMC nce ntxiv, qhov ceev ntawm kev khaws dej kuj nce ntxiv; thaum qhov viscosity nce mus txog qee qib, qhov nce ntawm qhov ceev ntawm kev khaws dej feem ntau maj mam.

6. Ntxiv cov nqi ntawm cellulose ether HPMC

Qhov ntau dua ntawm cov cellulose etherHPMCntxiv rau, qhov siab dua ntawm qhov ceev ntawm kev khaws dej thiab qhov zoo dua ntawm kev khaws dej.

Hauv qhov ntau ntawm 0.25-0.6%, tus nqi khaws dej tau nce sai nrog rau kev nce ntxiv ntawm qhov ntxiv; thaum qhov ntxiv ntxiv ntxiv, qhov sib txawv ntawm kev nce ntawm tus nqi khaws dej qeeb qeeb.