1. Lub npe cuav ntawm hydroxypropyl methylcellulose yog dab tsi?
——Teb: Hydroxypropyl Methyl Cellulose, Lus Askiv: Hydroxypropyl Methyl Cellulose Lub Npe Luv: HPMC lossis MHPC Alias: Hypromellose; Cellulose Hydroxypropyl Methyl Ether; Hypromellose, Cellulose, 2-hydroxypropylmethyl Cellulose ether. Cellulose hydroxypropyl methyl ether Hyprolose.
2. Daim ntawv thov tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?
——Teb: HPMC siv dav hauv cov ntaub ntawv siv hauv kev tsim kho, tshuaj pleev xim, cov khoom siv ua los ntawm cov khoom siv av nplaum, tshuaj, khoom noj, ntaub, kev ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam. HPMC tuaj yeem muab faib ua qib tsim kho, qib zaub mov thiab qib tshuaj raws li lub hom phiaj. Tam sim no, feem ntau ntawm cov khoom lag luam hauv tsev yog qib tsim kho. Hauv qib tsim kho, hmoov putty siv ntau heev, kwv yees li 90% yog siv rau hmoov putty, thiab qhov seem yog siv rau cov cement mortar thiab kua nplaum.
3. Muaj ntau hom hydroxypropyl methylcellulose (HPMC), thiab qhov sib txawv ntawm lawv siv yog dab tsi?
——Teb: HPMC muaj peev xwm muab faib ua hom tam sim ntawd thiab hom kub yaj. Cov khoom hom tam sim ntawd tawg sai sai hauv dej txias thiab ploj mus rau hauv dej. Lub sijhawm no, cov kua tsis muaj viscosity vim HPMC tsuas yog tawg hauv dej yam tsis muaj kev yaj tiag tiag. Kwv yees li 2 feeb, qhov viscosity ntawm cov kua maj mam nce, tsim cov colloid viscous pob tshab. Cov khoom kub-yaj, thaum ntsib nrog dej txias, tuaj yeem tawg sai sai hauv dej kub thiab ploj mus rau hauv dej kub. Thaum qhov kub poob rau qee qhov kub, qhov viscosity yuav maj mam tshwm sim kom txog thaum nws tsim cov colloid viscous pob tshab. Hom kub-yaj tsuas yog siv tau rau hauv hmoov putty thiab mortar. Hauv kua nplaum thiab xim, yuav muaj cov xwm txheej sib sau ua ke thiab tsis tuaj yeem siv. Hom tam sim ntawd muaj ntau yam kev siv. Nws tuaj yeem siv rau hauv hmoov putty thiab mortar, nrog rau kua nplaum thiab xim, tsis muaj kev tsis sib haum xeeb.
4. Yuav ua li cas xaiv hydroxypropyl methylcellulose (HPMC) uas haum rau ntau lub hom phiaj sib txawv?
——Teb::Kev siv hmoov putty: Qhov yuav tsum tau ua yog qis heev, thiab qhov viscosity yog 100,000, uas txaus. Qhov tseem ceeb yog kom dej zoo. Kev siv mortar: qhov yuav tsum tau ua siab dua, viscosity siab, 150,000 zoo dua. Kev siv kua nplaum: xav tau cov khoom lag luam tam sim ntawd nrog viscosity siab.
5. Yuav tsum tau them sai sai rau dab tsi hauv kev siv tiag tiag ntawm kev sib raug zoo ntawm viscosity thiab kub ntawm HPMC?
——Teb: Qhov viscosity ntawm HPMC yog inversely proportional rau qhov kub thiab txias, uas yog hais tias, qhov viscosity nce ntxiv thaum qhov kub thiab txias txo qis. Qhov viscosity ntawm cov khoom uas peb feem ntau xa mus rau yog hais txog qhov tshwm sim ntawm nws cov kua dej 2% ntawm qhov kub thiab txias ntawm 20 degrees Celsius.
Hauv kev siv ua haujlwm, yuav tsum nco ntsoov tias nyob rau hauv thaj chaw uas muaj qhov sib txawv ntawm qhov kub thiab txias ntawm lub caij ntuj sov thiab lub caij ntuj no, nws raug pom zoo kom siv cov viscosity qis dua thaum lub caij ntuj no, uas yog qhov zoo dua rau kev tsim kho. Txwv tsis pub, thaum qhov kub qis, qhov viscosity ntawm cellulose yuav nce ntxiv, thiab tes yuav hnyav thaum khawb.
Nruab nrab viscosity: 75000-100000 feem ntau yog siv rau putty
Vim li cas: kev khaws dej zoo
Siab viscosity: 150000-200000 Feem ntau siv rau polystyrene particle thermal insulation mortar roj hmab hmoov thiab vitrified microbead thermal insulation mortar.
Vim li cas: Qhov viscosity siab, cov mortar tsis yooj yim poob, sag, thiab kev tsim kho tau zoo dua.
6. HPMC yog ib qho non-ionic cellulose ether, yog li ntawd non-ionic yog dab tsi?
——Teb: Hauv cov lus yooj yim, cov non-ions yog cov tshuaj uas tsis ionize hauv dej. Ionization hais txog cov txheej txheem uas cov electrolyte raug dissociated mus rau hauv cov ions them uas tuaj yeem txav mus los tau yooj yim hauv cov kuab tshuaj tshwj xeeb (xws li dej, cawv). Piv txwv li, sodium chloride (NaCl), cov ntsev uas peb noj txhua hnub, yaj hauv dej thiab ionizes los tsim cov sodium ions (Na +) uas txav tau yooj yim uas muaj nqi zoo thiab chloride ions (Cl) uas muaj nqi tsis zoo. Uas yog hais tias, thaum HPMC raug muab tso rau hauv dej, nws yuav tsis dissociate mus rau hauv cov ions them, tab sis muaj nyob rau hauv daim ntawv ntawm cov molecules.
Lub sijhawm tshaj tawm: Plaub Hlis-26-2023