Yuav ua li cas yog cov txheej txheem dissolution ntawm hydroxypropyl methylcellulose HPMC?

1. Yuav ua li cas yog cov txheej txheem dissolution ntawm hydroxypropyl methylcellulose HPMC?

Teb: Txoj kev sib cais dej kub: Txij li HPMC tsis yaj hauv dej kub, HPMC tuaj yeem sib npaug hauv cov dej kub thaum pib, thiab tom qab ntawd yaj sai sai thaum txias. Ob txoj kev raug piav raws li hauv qab no:

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

Txoj kev sib xyaw hmoov: sib tov HPMC hmoov nrog ntau ntau ntawm lwm cov hmoov hmoov, sib tov kom huv si nrog lub tov khoom, thiab tom qab ntawd ntxiv dej kom yaj, ces HPMC tuaj yeem yaj nyob rau lub sijhawm no yam tsis muaj agglomeration, vim tias tsuas muaj HPMC me me hauv txhua qhov me me. ces kaum hmoov, yuav yaj tam sim ntawd thaum sib cuag nrog dej. ——Putty hmoov thiab mortar manufacturers siv txoj kev no. [Hydroxypropyl methylcellulose (HPMC) yog siv los ua cov thickener thiab dej tuav tus neeg sawv cev hauv cov hmoov mortar.

2) Muab cov dej kub uas xav tau rau hauv lub thawv thiab ua kom sov li ntawm 70 ° C. Cov hydroxypropyl methylcellulose tau maj mam ntxiv nyob rau hauv qeeb stirring, pib lub HPMC ntab rau saum npoo dej, thiab ces maj mam tsim ib slurry, uas yog txias nyob rau hauv stirring.

2. Muaj ntau hom hydroxypropyl methylcellulose HPMC. Dab tsi yog qhov txawv ntawm lawv cov kev siv?

Teb: Hydroxypropyl methylcellulose HPMC tuaj yeem muab faib ua hom instant thiab kub dissolution hom. Cov khoom lag luam tam sim no tawg sai sai hauv dej txias thiab ploj mus rau hauv dej. Lub sijhawm no, cov kua dej tsis muaj viscosity, vim tias HPMC tsuas yog tawg mus rau hauv dej, tsis muaj qhov yaj tiag tiag. Txog 2 feeb, cov viscosity ntawm cov kua maj mam nce, tsim cov pob tshab viscous colloid. Cov khoom kub yaj, thaum ntsib nrog dej txias, tuaj yeem tawg sai sai hauv dej kub thiab ploj hauv dej kub. Thaum qhov kub thiab txias poob rau qee qhov kub, qhov viscosity yuav maj mam tshwm kom txog thaum nws tsim cov pob tshab viscous colloid. Hom kub-melt tsuas yog siv rau hauv cov hmoov putty thiab mortar. Hauv cov kua nplaum thiab pleev xim, yuav muaj kev sib koom ua ke thiab siv tsis tau. Hom instant muaj ntau yam kev siv. Nws tuaj yeem siv rau hauv cov hmoov putty thiab mortar, nrog rau cov kua nplaum thiab xim, tsis muaj contraindications.

3. Dab tsi yog daim ntawv thov tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC)?

Teb: HPMC yog dav siv nyob rau hauv cov khoom siv, coatings, hluavtaws resins, ceramics, tshuaj, khoom noj khoom haus, textiles, ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam. HPMC tuaj yeem 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 siv hauv tsev yog qib kev tsim kho. Nyob rau hauv kev tsim kho qib, putty hmoov yog siv ntau npaum li cas, li 90% yog siv rau putty hmoov, thiab tus so yog siv rau cement mortar thiab kua nplaum.

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

Teb: (1) Lub ntiajteb txawj nqus tshwj xeeb: qhov loj dua qhov tshwj xeeb lub ntiajteb txawj nqus, qhov hnyav dua qhov zoo dua. Qhov piv yog loj, feem ntau vim

(2) Whiteness: Txawm hais tias dawb tsis tuaj yeem txiav txim siab seb HPMC puas siv tau yooj yim, thiab yog tias cov tshuaj ntxuav hniav 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 cov xim zoo nkauj.

(3) Fineness: Qhov zoo ntawm HPMC feem ntau muaj 80 mesh thiab 100 mesh, thiab 120 mesh tsawg dua. Feem ntau HPMC tsim nyob rau hauv Hebei yog 80 mesh. Qhov finer qhov fineness, qhov zoo dua nws yog feem ntau.

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

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

Teb: Hydroxypropyl cov ntsiab lus thiab viscosity, cov neeg siv feem ntau txhawj xeeb txog ob qhov ntsuas no. Cov uas muaj hydroxypropyl cov ntsiab lus siab feem ntau muaj cov dej tuav tau zoo dua. High viscosity, dej tuav, kuj (tshaj li

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

Teb: Putty hmoov feem ntau yog 100,000 yuan, thiab qhov yuav tsum tau rau mortar yog siab dua, thiab nws yooj yim siv 150,000 yuan. Ntxiv mus, qhov tseem ceeb tshaj plaws ua haujlwm ntawm HPMC yog dej tuav, ua raws li thickening. Hauv cov hmoov putty, tsuav yog cov dej tuav tau zoo thiab cov viscosity tsawg (70,000-80,000), kuj tseem tuaj yeem ua tau. Tau kawg, qhov siab dua qhov viscosity, qhov zoo dua qhov txheeb ze dej tuav. Thaum lub viscosity siab tshaj 100,000, lub viscosity yuav cuam tshuam cov dej tuav. Tsis ntau ntxiv lawm. Yog lawm) kuj zoo dua, thiab cov viscosity siab dua, thiab nws yog qhov zoo dua los siv hauv cov cement mortar.

7. Cov ntaub ntawv tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC) yog dab tsi?

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

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

Teb: Hauv cov hmoov putty, HPMC plays peb lub luag hauj lwm ntawm thickening, dej tuav thiab kev tsim kho. Thickening: Cellulose tuaj yeem ua kom tuab kom tshem tawm thiab ua kom cov tshuaj sib txawv nce thiab nqis, thiab tiv thaiv sagging. Kev tuav dej: ua kom cov hmoov putty qhuav maj mam, thiab pab cov hmoov tshauv calcium kom hnov ​​​​mob hauv qab 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 cov tshuaj tiv thaiv, tab sis tsuas yog ua lub luag haujlwm pabcuam. Ntxiv dej rau cov hmoov putty thiab muab tso rau ntawm phab ntsa yog cov tshuaj tiv thaiv, vim hais tias cov tshuaj tshiab yog tsim. Yog tias koj tshem cov hmoov putty rau ntawm phab ntsa ntawm phab ntsa, zom rau hauv cov hmoov, thiab siv nws dua, nws yuav tsis ua haujlwm vim tias cov tshuaj tshiab (calcium carbonate) tau tsim. ) thiab. Cov khoom tseem ceeb ntawm cov hmoov tshauv calcium hmoov yog: sib tov ntawm Ca (OH) 2, CaO thiab ib qho me me ntawm CaCO3, CaO + H2O = Ca (OH) 2 — Ca (OH) 2 + CO2 = CaCO3↓ + H2O Ash calcium yog nyob rau hauv dej thiab huab cua Raws li qhov kev txiav txim ntawm CO2, calcium carbonate yog tsim, thaum HPMC tsuas yog khaws cov dej, pab cov tshuaj tiv thaiv zoo ntawm cov tshauv calcium, thiab tsis koom nrog. tej yam tshuaj tiv thaiv nws tus kheej.

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

Teb: Nyob rau hauv layman cov ntsiab lus, non-ion yog ib yam khoom uas yuav tsis ionize nyob rau hauv dej. Ionization yog hais txog cov txheej txheem uas ib qho electrolyte dissociated rau hauv ions them uas tuaj yeem txav mus los ntawm cov kuab tshuaj tshwj xeeb (xws li dej, cawv). Piv txwv li, sodium chloride (NaCl), ntsev uas peb noj txhua hnub, yaj hauv dej thiab ionizes los tsim cov sodium ions (Na +) uas muaj txiaj ntsig zoo thiab cov tshuaj chloride ions (Cl) uas tsis zoo. Uas yog hais tias, thaum HPMC muab tso rau hauv dej, nws yuav tsis dissociate rau ions them, tab sis muaj nyob rau hauv daim ntawv ntawm molecules.

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

Teb: Cov hmoov poob ntawm putty hmoov yog feem ntau muaj feem xyuam rau qhov zoo ntawm cov hmoov tshauv calcium, thiab muaj me ntsis ua rau HPMC. Cov ntsiab lus calcium uas tsis tshua muaj ntawm grey calcium thiab qhov tsis zoo ntawm CaO thiab Ca (OH) 2 hauv cov calcium grey yuav ua rau cov hmoov poob. Yog tias nws muaj qee yam ua rau HPMC, ces yog HPMC muaj cov dej tuav tsis zoo, nws tseem yuav ua rau hmoov poob.

11. Lub gel kub ntawm hydroxypropyl methylcellulose cuam tshuam txog dab tsi?

Teb: Lub gel kub ntawm HPMC muaj feem xyuam rau nws cov ntsiab lus methoxy, qhov qis dua cov ntsiab lus methoxy ↓, qhov kub ntawm gel ntau dua.

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

Teb: Daim ntawv thov ntawm cov hmoov putty: qhov yuav tsum tau muaj tsawg, thiab cov viscosity yog 100,000, uas yog txaus. Qhov tseem ceeb yog khaws cov dej kom zoo. Daim ntawv thov ntawm mortar: siab dua, siab viscosity, 150,000 zoo dua. Daim ntawv thov ntawm cov kua nplaum: cov khoom siv tam sim nrog cov viscosity siab yog yuav tsum tau.

13. Dab tsi yog qhov txawv ntawm hom dej txias tam sim no thiab hom kub-soluble hydroxypropyl methylcellulose hauv cov txheej txheem tsim khoom?

Teb: Cov dej txias tam sim ntawm HPMC yog ntog kho nrog glyoxal, thiab nws tawg sai sai hauv dej txias, tab sis nws tsis yaj tiag tiag. Nws tsuas yog yaj thaum lub viscosity nce. Kub yaj hom tsis nto kho nrog glyoxal. Yog hais tias tus nqi ntawm glyoxal yog loj, dispersion yuav ceev, tab sis lub viscosity yuav nce maj mam, thiab yog hais tias tus nqi yog me me, qhov opposite yuav muaj tseeb.

14. Dab tsi yog qhov tsw ntawm hydroxypropyl methylcellulose (HPMC)?

Teb: HPMC tsim los ntawm cov txheej txheem hnyav siv toluene thiab isopropanol ua cov kuab tshuaj. Yog tias kev ntxhua khaub ncaws tsis zoo, yuav muaj qee qhov tsw ntxhiab tsw.

15. Lwm lub npe rau hydroxypropyl methylcellulose yog dab tsi?

Teb: Hydroxypropyl Methyl Cellulose, Lus Askiv: Hydroxypropyl Methyl Cellulose Abbreviation: HPMC los yog MHPC Alias: Hypromellose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl methyl Cellulose ether. Cellulose hydroxypropyl methyl ether Hyprolose.

16. Dab tsi yuav tsum tau them rau hauv kev siv tiag tiag ntawm kev sib raug zoo ntawm viscosity thiab kub ntawm HPMC?

Teb: Lub viscosity ntawm HPMC yog inversely proportional rau qhov kub thiab txias, uas yog hais tias, lub viscosity nce raws li qhov kub thiab txias. Lub viscosity ntawm ib yam khoom peb feem ntau xa mus rau qhov kev xeem ntawm nws 2% aqueous tov ntawm qhov kub ntawm 20 degrees Celsius.

Hauv kev siv tswv yim, nws yuav tsum raug sau tseg tias nyob rau hauv cov cheeb tsam uas muaj qhov sib txawv ntawm qhov kub thiab txias ntawm lub caij ntuj sov thiab lub caij ntuj no, nws raug nquahu kom siv cov viscosity tsawg hauv lub caij ntuj no, uas yog qhov zoo rau kev tsim kho. Txwv tsis pub, thaum kub qis, viscosity ntawm cellulose yuav nce, thiab txhais tes xav tias yuav hnyav thaum khawb. Nruab nrab viscosity: 75000-100000 Mas siv rau putty. Yog vim li cas: tuav dej zoo. High viscosity: 150000-200000 Feem ntau yog siv rau polystyrene particle thermal rwb thaiv tsev mortar kua nplaum hmoov thiab vitrified microbead thermal rwb thaiv tsev mortar. Yog vim li cas: siab viscosity, mortar tsis yooj yim rau poob, dai, thiab txhim kho kev tsim kho.

17. Kev thov ntawm HPMC hauv cov hmoov putty, yog vim li cas rau cov npuas hauv cov hmoov putty?

Teb: Hauv cov hmoov putty, HPMC plays peb lub luag hauj lwm ntawm thickening, dej tuav thiab kev tsim kho. Tsis txhob koom nrog kev tawm tsam. Yog vim li cas rau npuas: 1. Muab dej ntau dhau. 2. Cov txheej hauv qab tsis qhuav, tsuas yog txhuam lwm txheej rau saum, thiab nws yooj yim ua npuas dej.