Cov txheej txheem yaj ntawm hydroxypropyl methylcellulose HPMC yog dab tsi?

1. Cov txheej txheem yaj ntawm hydroxypropyl methylcellulose HPMC yog dab tsi?

Lus Teb: Txoj kev yaj dej kub: Vim tias HPMC tsis yaj hauv dej kub, HPMC tuaj yeem yaj sib npaug hauv dej kub thaum pib, thiab tom qab ntawd yaj sai sai thaum txias. Ob txoj kev ib txwm muaj piav qhia raws li hauv qab no:

1), ntxiv 1/3 lossis 2/3 ntawm cov dej uas xav tau rau hauv lub thawv, thiab ua kom sov txog 70 ° C, faib HPMC raws li txoj kev 1), thiab npaj cov dej kub slurry; tom qab ntawd ntxiv cov dej txias seem rau hauv cov dej kub slurry, qhov sib tov tau txias tom qab do.

Txoj kev sib tov hmoov: sib tov HPMC hmoov nrog ntau yam khoom siv hmoov, sib tov kom huv si nrog lub tshuab sib tov, thiab tom qab ntawd ntxiv dej kom yaj, tom qab ntawd HPMC tuaj yeem yaj tau lub sijhawm no yam tsis muaj kev sib sau ua ke, vim tias tsuas muaj me ntsis HPMC hauv txhua lub ces kaum me me Hmoov, yuav yaj tam sim ntawd thaum sib cuag nrog dej. —— Cov chaw tsim khoom hmoov putty thiab mortar siv txoj kev no. [Hydroxypropyl methylcellulose (HPMC) yog siv los ua cov khoom siv tuab thiab khaws dej hauv putty hmoov mortar.

2) Muab cov dej kub uas xav tau rau hauv lub thawv thiab ua kom sov txog li 70 ° C. Cov hydroxypropyl methylcellulose maj mam ntxiv rau hauv qab qeeb qeeb, thaum xub thawj HPMC ntab rau saum npoo dej, thiab tom qab ntawd maj mam tsim cov slurry, uas tau txias hauv qab nplawm.

2. Muaj ntau hom hydroxypropyl methylcellulose HPMC. Qhov txawv ntawm lawv siv yog dab tsi?

Lus Teb: Hydroxypropyl methylcellulose 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, tsis muaj qhov 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.

3. Daim ntawv thov tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?

Lus 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 muaj peev xwm muab faib ua: qib kev tsim kho, qib zaub mov thiab qib tshuaj raws li kev siv. Tam sim no, feem ntau ntawm cov khoom hauv tsev yog qib kev tsim kho. Hauv qib kev 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.

4. Yuav ua li cas txiav txim siab qhov zoo ntawm hydroxypropyl methylcellulose (HPMC) yooj yim thiab intuitively?

Lus Teb: (1) Lub zog hnyav tshwj xeeb: Lub zog hnyav tshwj xeeb loj dua, qhov hnyav dua qhov zoo dua. Qhov piv loj, feem ntau vim tias

(2) Kev dawb: Txawm hais tias kev dawb tsis tuaj yeem txiav txim siab seb HPMC puas yooj yim siv, thiab yog tias cov neeg sawv cev dawb ntxiv thaum lub sijhawm tsim khoom, nws yuav cuam tshuam rau nws qhov zoo. Txawm li cas los xij, feem ntau ntawm cov khoom zoo muaj kev dawb zoo.

(3) Kev Zoo: Qhov zoo ntawm HPMC feem ntau muaj 80 mesh thiab 100 mesh, thiab 120 mesh tsawg dua. Feem ntau HPMC tsim tawm hauv Hebei yog 80 mesh. Qhov zoo dua qhov zoo, qhov zoo dua nws feem ntau.

(4) Kev xa hluav taws xob: muab hydroxypropyl methylcellulose (HPMC) rau hauv dej kom tsim tau cov pob tshab colloid, thiab xyuas nws cov kev xa hluav taws xob. Qhov siab dua qhov kev xa hluav taws xob, qhov zoo dua, qhia tias muaj cov insolubles tsawg dua hauv nws. . Lub permeability ntawm lub reactor ntsug feem ntau zoo, thiab ntawm lub reactor kab rov tav yog qhov phem dua, tab sis nws tsis txhais tau tias qhov zoo ntawm lub reactor ntsug zoo dua li ntawm lub reactor kab rov tav, thiab muaj ntau yam los txiav txim siab qhov zoo ntawm cov khoom. Cov ntsiab lus ntawm hydroxypropyl pawg hauv nws yog siab, thiab cov ntsiab lus ntawm hydroxypropyl pawg yog siab, thiab cov dej khaws cia zoo dua.

5. Cov cim qhia tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?

Lus Teb: Cov ntsiab lus Hydroxypropyl thiab viscosity, feem ntau cov neeg siv txhawj xeeb txog ob qho cim no. Cov neeg uas muaj cov ntsiab lus hydroxypropyl siab feem ntau muaj kev khaws cia dej zoo dua. Cov viscosity siab, kev khaws cia dej, zoo li (es tsis yog

6. Qhov viscosity tsim nyog ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?

Lus Teb: Hmoov Putty feem ntau yog 100,000 yuan, thiab qhov yuav tsum tau rau cov mortar siab dua, thiab nws yooj yim siv 150,000 yuan. Ntxiv mus, qhov tseem ceeb tshaj plaws ntawm HPMC yog kev khaws dej, ua raws li kev tuab. Hauv cov hmoov putty, tsuav yog qhov khaws dej zoo thiab viscosity qis (70,000-80,000), nws kuj ua tau. Tau kawg, qhov siab dua qhov viscosity, qhov zoo dua qhov kev khaws dej txheeb ze. Thaum qhov viscosity tshaj 100,000, qhov viscosity yuav cuam tshuam rau qhov khaws dej. Tsis ntau lawm. Kiag li) kuj zoo dua, thiab viscosity siab dua, thiab nws zoo dua los siv hauv cov cement mortar.

7. Cov khoom siv tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?

Lus Teb: Cov khoom siv tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC): paj rwb zoo, methyl chloride, propylene oxide, thiab lwm yam khoom siv raw, caustic soda, acid, toluene, isopropanol, thiab lwm yam.

8. Lub luag haujlwm tseem ceeb ntawm daim ntawv thov HPMC hauv cov hmoov putty yog dab tsi, thiab nws puas tshwm sim los ntawm tshuaj lom neeg?

Lus Teb: Hauv cov hmoov putty, HPMC ua peb lub luag haujlwm ntawm kev ua kom tuab, khaws dej thiab tsim kho. Kev ua kom tuab: Cellulose tuaj yeem ua kom tuab kom ncua thiab khaws cov tshuaj sib xws nce thiab nqis, thiab tiv taus kev poob qis. Kev khaws dej: ua kom cov hmoov putty qhuav qeeb qeeb, thiab pab cov tshauv calcium kom ua haujlwm raws li dej. Kev tsim kho: Cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau cov hmoov putty muaj kev tsim kho zoo. HPMC tsis koom nrog hauv kev tshuaj lom neeg, tab sis tsuas yog ua lub luag haujlwm pabcuam. Ntxiv dej rau cov hmoov putty thiab muab tso rau ntawm phab ntsa yog kev tshuaj lom neeg, vim tias cov tshuaj tshiab tau tsim. Yog tias koj tshem cov hmoov putty ntawm phab ntsa ntawm phab ntsa, zom nws ua hmoov, thiab siv nws dua, nws yuav tsis ua haujlwm vim tias cov tshuaj tshiab (calcium carbonate) tau tsim.) ib yam nkaus. Cov khoom tseem ceeb ntawm cov hmoov tshauv calcium yog: sib xyaw ntawm Ca (OH) 2, CaO thiab me me ntawm CaCO3, CaO + H2O = Ca (OH) 2—Ca (OH) 2 + CO2 = CaCO3↓ + H2O Cov tshauv calcium nyob hauv dej thiab huab cua Hauv qab qhov kev ua ntawm CO2, calcium carbonate yog tsim, thaum HPMC tsuas yog khaws dej, pab txhawb kev ua haujlwm zoo dua ntawm cov tshauv calcium, thiab tsis koom nrog hauv kev ua haujlwm nws tus kheej.

9. HPMC yog ib qho non-ionic cellulose ether, yog li ntawd non-ionic yog dab tsi?

Lus Teb: Hauv cov lus yooj yim, cov khoom tsis yog ion yog ib yam khoom uas yuav 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 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.

10. Puas muaj kev sib raug zoo ntawm qhov poob ntawm cov hmoov putty thiab HPMC?

Lus Teb: Qhov poob ntawm cov hmoov putty feem ntau yog cuam tshuam nrog qhov zoo ntawm cov tshauv calcium, thiab tsis muaj feem cuam tshuam nrog HPMC. Cov calcium tsawg ntawm grey calcium thiab qhov sib piv tsis raug ntawm CaO thiab Ca (OH) 2 hauv grey calcium yuav ua rau poob hmoov. Yog tias nws muaj feem cuam tshuam nrog HPMC, ces yog tias HPMC tsis khaws dej zoo, nws tseem yuav ua rau poob hmoov.

11. Qhov kub ntawm hydroxypropyl methylcellulose hauv gel muaj feem xyuam li cas?

Lus Teb: Qhov kub ntawm HPMC gel muaj feem cuam tshuam nrog nws cov ntsiab lus methoxy, qhov qis dua cov ntsiab lus methoxy↓, qhov kub ntawm gel siab dua.

12. Yuav ua li cas xaiv cov hydroxypropyl methylcellulose (HPMC) uas tsim nyog rau ntau lub hom phiaj sib txawv?

Lus Teb: Kev siv cov 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 cov mortar: qhov yuav tsum tau ua siab dua, viscosity siab, 150,000 zoo dua. Kev siv cov kua nplaum: cov khoom lag luam tam sim ntawd nrog viscosity siab yog qhov yuav tsum tau ua.

13. Qhov txawv ntawm hom dej txias uas yaj tau sai thiab hom hydroxypropyl methylcellulose uas yaj tau kub hauv cov txheej txheem tsim khoom yog dab tsi?

Lus Teb: Hom HPMC uas siv dej txias tam sim ntawd yog kho nrog glyoxal, thiab nws tawg sai sai hauv dej txias, tab sis nws tsis yaj tiag tiag. Nws tsuas yog yaj thaum qhov viscosity nce ntxiv. Hom kub yaj tsis kho nrog glyoxal. Yog tias qhov ntau ntawm glyoxal loj, qhov tawg yuav sai, tab sis qhov viscosity yuav nce qeeb, thiab yog tias qhov ntau me me, qhov sib txawv yuav yog qhov tseeb.

14. Hydroxypropyl methylcellulose (HPMC) muaj ntxhiab li cas?

Lus Teb: HPMC tsim los ntawm txoj kev siv cov tshuaj yaj siv toluene thiab isopropanol ua cov tshuaj yaj. Yog tias ntxuav tsis zoo heev, yuav muaj qee qhov tsw ntxhiab seem.

15. Lub npe hu ua 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-hydroxypropyl methyl Cellulose ether. Cellulose hydroxypropyl methyl ether Hyprolose.

16. 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?

Lus 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 2% aqueous kua ntawm qhov kub 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. Qhov viscosity nruab nrab: 75000-100000 Feem ntau siv rau putty. Vim li cas: khaws dej zoo. Qhov viscosity siab: 150000-200000 Feem ntau siv rau polystyrene particle thermal insulation mortar kua nplaum hmoov thiab vitrified microbead thermal insulation mortar. Vim li cas: viscosity siab, mortar tsis yooj yim poob, dai, thiab txhim kho kev tsim kho.

17. Daim ntawv thov ntawm HPMC hauv putty hmoov, dab tsi yog qhov laj thawj rau cov npuas hauv cov hmoov putty?

Lus Teb: Hauv cov hmoov putty, HPMC ua peb lub luag haujlwm ntawm kev ua kom tuab, khaws dej thiab tsim kho. Tsis txhob koom nrog txhua qhov kev tawm tsam. Vim li cas rau cov npuas: 1. Muab dej ntau dhau. 2. Txheej hauv qab tsis qhuav, tsuas yog khawb lwm txheej rau saum, thiab nws yooj yim ua npuas.