Hais Txog HydroxyPropy Cellulose

1. Dab tsi yog qhov kev siv ntawm cellule tseem ceeb yog dab tsi?

HPMC yog dav siv hauv cov khoom siv tsim kho, cov khoom siv hluavtaws, cov tshuaj, cov khoom noj, cov tshuaj ua liaj ua teb, luam yeeb thiab lwm yam kev lag luam. HPMC tuaj yeem faib ua qib kev lag luam, cov zaub mov qib thiab cov qib tsev muag khoom raws li daim ntawv thov.

2. Muaj ob peb hom cellulose, thiab dab tsi yog qhov sib txawv hauv lawv cov kev siv?

HPMC tuaj yeem muab faib ua cov hom tseem ceeb (hom npe Suffix "thiab kub-yaj. Instant-hom khoom tawg tawm sai sai hauv dej txias thiab ploj mus rau hauv dej. Nyob rau lub sijhawm no, cov kua tsis muaj viscosity vim HPMC tsuas yog dispersed hauv dej yam tsis muaj kev sib cais tiag. Hais txog (nplawm) rau 2 feeb, lub viscosity ntawm cov kua maj mam nce, kev sib sau pob tshab dawb viscous colloid. Cov khoom kub kub yaj, thaum ntsib cov dej txias, tuaj yeem xa tawm sai sai hauv dej kub thiab ploj hauv dej kub. Thaum qhov kub thiab txias rau ib qho kub thiab txias (raws li cov khoom kub thiab txias (raws li cov khoom kub ntawm cov khoom), lub viscosity yuav maj mam tshwm sim kom txog thaum nws tsim lub pob tshab viscous colloid.

3. Dab tsi yog cov hau kev ntawm dissolving cellulose?

1). Txhua tus qauv tuaj yeem raug ntxiv rau cov khoom siv los ntawm kev sib xyaw qhuav;

2). Thaum nws xav tau ncaj qha ntxiv rau qhov ntsuas kub qub qub, nws yog qhov zoo dua rau kev siv dej txias hom. Nws feem ntau yuav siv 1-30 feeb kom tuab tom qab ntxiv (do thiab do)

3). Cov qauv zoo tib yam tau ua thawj zaug thiab tawg nrog dej kub, tom qab ntawd yaj hauv dej txias tom qab ua kom txias;

4). Yog hais tias agglomeration tshwm sim thaum lub sij hawm sib tov, nws yog vim tias lub stirring tsis txaus lossis tus qauv zoo tib yam yog hais ncaj qha rau dej txias. Lub sijhawm no, nws yuav tsum tau ua sai sai. tus

5). Yog tias npuas yog tsim tawm thaum xaus, lawv tuaj yeem raug txiav tawm ntawm 2-12 teev (lub sijhawm tshwj xeeb yog qhov tsim nyog, thiab lwm yam tsim nyog ntawm defojing tus neeg sawv cev tseem tuaj yeem muab ntxiv. tus

4. Yuav ua li cas thiaj txiav txim siab qhov zoo ntawm cellulose tsuas yog thiab intuitively?

1) whiteness, tsis zoo tsis tuaj yeem txiav txim siab seb HPMC yooj yim siv tau yooj yim, thiab feem ntau ntawm cov khoom lag luam zoo muaj zoo dawb.

2) Fineness: lub txiaj ntsig ntawm HPMC feem ntau muaj 80 mesh thiab 100 mesh, 120 mesh yog tsawg dua, tus finer tus finer zoo dua.

3) Kev hloov chaw teeb meem: Tom qab HPMC tau muab tso rau hauv dej los ua tus colloid, saib nws cov kev pauv teeb meem. Qhov ntau dua qhov kev hloov pauv loj, qhov zoo dua, qhia tias muaj tsawg dua insolubles hauv nws, thiab kev sib txuas ntawm cov ntsug hloov pauv feem ntau yog qhov zoo. , Cov kab rov tav yog qhov phem dua, tab sis nws tsis txhais tau tias qhov zoo tshaj ntawm txoj kab rov tav zoo dua li qhov ntawm cov ntsiab lus rov qab ua kom pom cov khoom lag luam zoo.

4) Qhov loj dua kev nqus: qhov loj dua qhov sib tsoo tshwj xeeb, qhov hnyav dua qhov zoo dua. Qhov siab dua qhov kev nqus yuam kev, ntau dua cov ntsiab lus hydroxypropylopyl hauv cov khoom. Lub siab dua cov ntsiab lus hydroxypropyl, qhov zoo dua cov dej khaws cia.

5. Tus nqi ntawm cellulose hauv cov hmoov putty?

Tus nqi ntawm HPMC siv hauv cov ntawv thov kev kawm cuam tshuam los ntawm huab cua, kub, cov mis ntawm cov hmoov noj thiab cov neeg siv khoom zoo. Muaj cov sib txawv ntawm cov chaw sib txawv, feem ntau hais lus, nws yog nruab nrab ntawm 4-5 kg.

6. Dab tsi yog qhov tsim nyog viscosity ntawm cellulose?

Feem ntau, 100,000 cov hmoov putty yog txaus, thiab qhov yuav tsum tau nyob rau hauv txau yog siab dua, thiab nws xav tau 150,000 yuav tsum tau yooj yim siv. Ntxiv mus, cov haujlwm tseem ceeb tshaj plaws ntawm HPMC yog dej tuav, ua raws li thickening. Hauv cov hmoov putty, tsuav li lub taub dej ceev yog qhov zoo thiab lub viscosity yog tsawg (7-8), nws tseem ua tau. Ntawm chav kawm, qib siab dua viscosity, zoo dua cov txheeb ze cov dej rov qab khaws cia. Thaum lub viscosity tshaj 100,000, lub viscosity tsis muaj kev cuam tshuam ntawm dej khaws cia. Loj.

7. Dab tsi yog cov ntsuas ntsuas tseem ceeb ntawm cellulose?

Hydroxypropyl cov ntsiab lus

Methyl Cov Ntsiab Lus

viscosity

Txhos

Poob rau ziab

8. Dab tsi yog cov ntaub ntawv nyoos ntawm cellulose?

Cov ntaub ntawv raw tseem ceeb ntawm HPMC: Refined Paj Rwb, Methyl chloride, Propylene Oxide, ua kua Ceustric dej qab zib, thiab lwm yam.

9. Dab tsi yog qhov ua haujlwm tseem ceeb ntawm daim ntawv thov cellulose hauv putty hmoov? Puas muaj tshuaj lom neeg siv tshuaj?

Ntawm cov hmoov putty, nws ua peb lub luag hauj lwm ntawm thickening, dej tuav thiab tsim kho. Thickening, cellulose tuaj yeem thicken kom ncua, ua kom cov kev daws teeb meem thiab nqis, thiab tiv taus sagging. Dej khaws cia: Ua cov hmoov ua kom qhuav maj mam, thiab pab cov ntug dej tshauv kom muaj kev cuam tshuam hauv kev ua dej. Kev tsim kho: Cellulose muaj cov nyhuv muaj lubricating nyhuv, uas tuaj yeem ua rau cov hmoov puty muaj kev tsim kho zoo. HPMC tsis koom nrog kev siv tshuaj lom neeg, tab sis tsuas yog ua lub luag haujlwm pab pawg.

10. Cellulose yog cov tsis-ionic cellulose ether, yog li dab tsi tsis yog-ionic?

Nyob rau hauv cov lus sau cov lus, cov tshuaj tsw qab tsis koom nrog tshuaj lom neeg.

CMC (Carboxymethyl cellulose) yog cellulose cellulose, yog li nws yuav hloov mus rau hauv taum taum tshauv thaum nws ntsib cov hmoov av calcium.

11 Lub qhov kub thiab txias ntawm cellulose ntsig txog dab tsi?

Lub qhov kub thiab txias ntawm HPMC muaj feem cuam tshuam nrog nws cov ntsiab lus methoxy, qis dua cov ntsiab lus methoxy, ntau dua cov gel kub.

12. Puas muaj kev sib raug zoo ntawm cov hmoov poob ntawm cov hmoov putty thiab cellulose?

Muaj kev sib raug zoo! ! ! Ntawd yog, cov dej tsis zoo khaws cia HPMC yuav ua rau hmoov hmoov zoo li cov hmoov tshauv, muaj cov cement, kev siv ntsuas kub, thiab phab ntsa txhua tus yuav raug cuam tshuam).

13. Dab tsi yog qhov sib txawv ntawm dej txias nrawm thiab kub soluble cellulose hauv cov txheej txheem ntau lawm?

Cov dej txias tam sim ntawm HPMC yog cov npoo-kho nrog glyoxal, thiab nws disperses sai sai hauv dej txias, tab sis nws tsis paub tiag tiag. Nws tsuas yaj tag thaum viscosity nce. Kub qhuav hom tsis yog cov npoo kho nrog glyoxal. Yog tias tus nqi ntawm glyoxal yog loj, kev dispersion yuav tau nrawm, tab sis cov viscosity yuav nce qeeb, thiab yog tias tus nqi me, qhov fab ntxeev yuav muaj tseeb.

14. Vim li cas cellulose muaj tsw ntxhiab?

HPMC tau tsim los ntawm cov txheej txheem hnyav siv tau toluene thiab isopropanol raws li cov kuab tshuaj. Yog hais tias ntxuav tsis zoo heev, yuav muaj qee cov ntxhiab tsw. (Nuv nyiaj rov qab yog qhov txheej txheem tseem ceeb ntawm cov ntxhiab)

15. Yuav ua li cas xaiv cov cellulose rau cov laj thawj sib txawv?

Putty Hmoov: Yuav tsum tau siv dej siab, siv tau zoo yooj yim

Capaent dogas dog dig-raws li cug: yuav tsum tau siv dej siab, cov kub tsis kam, thiab nrawm viscire

Daim ntawv thov ntawm kev siv kua nplaum: Cov khoom lag luam uas muaj cov viscosity siab. (Pom zoo qib

Gypsum kev sib xyaw: cov dej siab khaws cia, nruab nrab thiab qis viscosity, tam sim ntawd pom viscosity nce

16. Dab tsi yog lwm lub npe rau cellulose?

Raug xa mus rau li HPMC lossis MHPC ALIAS HYPROMELLED, cellulose hydroxypropyl methylropey ether.

17. Daim ntawv thov ntawm cellulose hauv putty hmoov, dab tsi yog vim li cas rau lub npuas hauv cov hmoov putty?

Hauv cov hmoov putty, HPMC ua si peb lub luag haujlwm ntawm thickening, dej tuav thiab tsim kho. Cov laj thawj rau lub npuas yog:

1. Cov dej ntau dhau ntxiv.

2. Hauv qab txheej tsis qhuav, tsuas yog txhuam lwm txheej rau saum, thiab nws yooj yim rau ua npuas ncauj.

18. Dab tsi yog qhov sib txawv ntawm cellulose thiab mc:

MC yog methyl cellulose, uas yog ua los ntawm cellulose ether los ntawm kev kho cov paj rwb nrog alkali, siv tshuaj methane, thiab tab tom muaj kev cuam tshuam. Feem ntau, cov qib degree hloov chaw yog 1.6-2.0, thiab lub solubility nrog sib txawv degree hloov chaw. Txawv, nws belongs rau cov tsis-ionic cellulose ether.

(1) Cov dej ua kom muaj methylcellulose nyob ntawm nws cov nyiaj ntxiv, viscosity, particle txaus thiab ua kom kawg. Feem ntau, yog tias qhov nyiaj ntxiv yog qhov loj, lub fineness yog me me, thiab viscosity yog qhov loj, dej khaws cia siab dua yog siab. Ntawm lawv, tus nqi ntxiv muaj kev cuam tshuam ntau dua rau tib neeg dej khaws cia. Lub viscosity tsis yog ib feem ntawm cov dej khaws cia. Qhov kev cais tawm tsuas yog nyob ntawm cov npoo ntawm cov cellulose. Degree ntawm kev hloov kho thiab particle txaus. Ntawm cov saum toj no ntau cov cellulose muaj kev hais ua kom muaj kev hais ua ke ntawm methyl cellulose thiab jinshuiqiao cellulose loj dua.

(2) Methylcellulose yog soluble hauv dej txias, thiab nws yuav nyuaj rau yaj hauv dej kub. Nws cov kev daws teeb meem aqueous yog qhov ruaj khov heev hauv cov xov tooj ntawm PH = 3-12. Nws muaj qhov sib xyaw zoo nrog cov hmoov txhuv nplej siab, thiab lwm yam thiab ntau yam surfactants. Thaum qhov kub thiab txias thaum lub gelation kub tau mus txog, gelation yuav tshwm sim.

(3) Kev hloov pauv qhov kub yuav cuam tshuam rau cov dej tuav ntawm tus nqi methyl ntawm methyl polulose. Feem ntau, qhov ntsuas kub siab dua, qhov tsis zoo ntawm cov dej khaws cia. Yog tias lub tshuaj khib qhov kub tshaj 40 degrees, dej ceev ceev ntawm methyl cellulose yuav raug txo qis, uas yuav cuam tshuam rau kev tsim kho cov tshuaj khib.

(4) Methyl cellulose muaj qhov cuam tshuam tseem ceeb ntawm kev tsim kho thiab nplaum ntawm cug. Adhesion ntawm no yog hais txog lub zog nplaum tau hnov ​​ntawm tus neeg ua haujlwm cov cuab tam thiab lub phab ntsa substrate, uas yog, cov shear tiv thaiv ntawm lub cug. Cov nplaum yog qhov siab, cov shear tiv thaiv ntawm cov neeg ua haujlwm yog loj, thiab lub zog ntawm cov neeg ua haujlwm ntawm cov txheej txheem yog loj, thiab kev tsim kho ntawm lub tshuaj khib yog neeg pluag.