Cov kauj ruam tsim khoom thiab cov teb thov ntawm HPMC

1. Kev Taw Qhia Txog Hydroxypropyl Methylcellulose (HPMC)

Hydroxypropyl Methylcellulose (HPMC)yog ib qho cellulose ether uas tsis yog ionic ua los ntawm cov paj rwb ntuj lossis cov ntoo pulp los ntawm kev hloov kho tshuaj lom neeg. HPMC muaj cov dej solubility zoo, thickening, stability, zaj duab xis-tsim cov khoom thiab biocompatibility, yog li nws yog dav siv hauv kev tsim kho, tshuaj, khoom noj, tshuaj txhua hnub thiab lwm yam teb.

2. Cov kauj ruam tsim khoom ntawm HPMC

Kev tsim cov HPMC feem ntau suav nrog cov kauj ruam tseem ceeb hauv qab no:

Kev npaj cov khoom siv raw

Cov khoom siv tseem ceeb ntawm HPMC yog cov cellulose ntuj uas muaj cov khoom qab zib siab (feem ntau yog los ntawm paj rwb lossis ntoo pulp), uas xav tau kev kho mob ua ntej kom tshem tawm cov khoom tsis huv thiab xyuas kom meej tias cov cellulose huv thiab sib xws.

Kev kho mob alkalinization

Muab cov cellulose tso rau hauv lub reactor thiab ntxiv cov sodium hydroxide (NaOH) kom txaus kom cov cellulose o hauv ib puag ncig alkaline los tsim cov alkali cellulose. Cov txheej txheem no tuaj yeem ua rau cov cellulose ua haujlwm ntau dua thiab npaj rau cov tshuaj tiv thaiv etherification tom ntej.

Kev ua haujlwm ntawm Etherification

Raws li alkali cellulose, cov neeg sawv cev methylating (xws li methyl chloride) thiab cov neeg sawv cev hydroxypropylating (xws li propylene oxide) tau qhia los ua cov tshuaj tiv thaiv etherification. Cov tshuaj tiv thaiv feem ntau yog ua nyob rau hauv lub tshuab hluav taws xob kaw siab. Ntawm qee qhov kub thiab siab, cov pab pawg hydroxyl ntawm cellulose raug hloov los ntawm methyl thiab hydroxypropyl pab pawg los tsim hydroxypropyl methylcellulose.

Kev ntxuav tsis muaj zog

Tom qab ua tiav qhov kev tshuaj tiv thaiv, cov khoom yuav muaj cov tshuaj reagents thiab cov khoom lag luam tsis tau ua haujlwm, yog li nws yog qhov tsim nyog ntxiv cov kua qaub rau kev kho mob neutralization, thiab tom qab ntawd ntxuav nrog ntau cov dej lossis cov kuab tshuaj organic kom tshem tawm cov khoom alkaline thiab cov khoom tsis huv.

Kev ziab thiab ziab

Cov tshuaj HPMC uas ntxuav lawm yog centrifuged lossis lim kom tshem tawm cov dej ntau dhau, thiab tom qab ntawd siv cov thev naus laus zis ziab qis-kub los ua cov hmoov qhuav lossis flakes kom tswj tau cov khoom siv lub cev thiab tshuaj ntawm HPMC.

Kev sib tsoo thiab kev tshuaj ntsuam

Cov HPMC qhuav raug xa mus rau cov khoom siv sib tsoo rau kev sib tsoo kom tau txais HPMC hmoov ntawm ntau qhov loj me sib txawv. Tom qab ntawd, kev tshuaj ntsuam thiab kev ntsuas qib raug ua kom ntseeg tau tias cov khoom sib xws kom ua tau raws li cov kev xav tau sib txawv.

Ntim thiab khaws cia

Tom qab kuaj xyuas zoo, cov khoom kawg tau ntim raws li kev siv sib txawv (xws li 25kg / hnab) thiab khaws cia rau hauv qhov chaw qhuav thiab muaj cua nkag kom tiv thaiv cov dej noo lossis cov kuab paug.

3. Cov chaw thov tseem ceeb ntawm HPMC

Vim nws cov khoom zoo thickening, zaj duab xis-tsim, dej-tuav, emulsifying thiab biocompatibility, HPMC tau siv dav hauv ntau yam lag luam:

Kev lag luam tsim kho

HPMC yog ib qho khoom siv tseem ceeb rau cov ntaub ntawv tsim kho, feem ntau yog siv rau:

Cov tshuaj cement: txhim kho kev ua haujlwm ntawm kev tsim kho, txhim kho kev nplaum, thiab tiv thaiv kev poob dej ntau dhau.

Cov nplaum rau pobzeb: ua kom cov dej khaws cia ntawm cov nplaum rau pobzeb thiab txhim kho kev ua haujlwm ntawm kev tsim kho.

Cov khoom siv gypsum: txhim kho kev tiv thaiv kab nrib pleb thiab kev ua haujlwm ntawm kev tsim kho.

Hmoov Putty: txhim kho kev nplaum, kev tiv thaiv tawg thiab kev tiv thaiv kev sagging.

Pem teb uas nws tus kheej leveled: txhim kho kev npliag, kev tiv thaiv kev hnav thiab kev ruaj khov.

Kev lag luam tshuaj

HPMC yog siv dav hauv kev lag luam tshuaj xws li:

Cov tshuaj pleev xim thiab cov tshuaj ua zaj duab xis rau cov ntsiav tshuaj: txhim kho kev ruaj khov ntawm cov tshuaj thiab tswj kev tso tawm ntawm cov tshuaj.

Cov tshuaj uas tso tawm tas mus li thiab cov tshuaj uas tswj tau: siv rau hauv cov ntsiav tshuaj uas tso tawm tas mus li thiab cov plhaub tshuaj uas tswj tau los tswj kev tso tawm tshuaj.

Cov tshuaj hloov tshuaj ntsiav: siv rau hauv kev tsim cov tshuaj ntsiav zaub (tshuaj ntsiav zaub).

4. Kev lag luam zaub mov

HPMC yog siv ua cov khoom noj khoom haus ntxiv rau:

Cov khoom ua kom tuab thiab emulsifier: siv rau hauv cov khoom ci, jellies, kua ntses, thiab lwm yam los txhim kho qhov saj ntawm cov zaub mov.

Stabilizer: siv rau hauv ice cream thiab cov khoom noj siv mis kom tiv thaiv cov protein precipitation.

Khoom noj tsis muaj nqaij: siv ua cov khoom ua kom tuab rau cov khoom noj cog los hloov cov khoom ruaj khov los ntawm tsiaj xws li gelatin.

Kev lag luam tshuaj lom neeg txhua hnub

HPMC yog ib qho khoom xyaw tseem ceeb hauv cov tshuaj pleev ib ce thiab cov khoom siv tu tus kheej:

Cov khoom siv saib xyuas tawv nqaij: siv rau hauv cov tshuaj pleev, lub ntsej muag lub ntsej muag, thiab lwm yam los muab cov dej noo thiab ruaj khov.

Tshuaj zawv plaub hau thiab tshuaj da dej: ua kom cov npuas dej ruaj khov thiab txhim kho qhov viscosity.

Tshuaj txhuam hniav: siv ua cov khoom ua kom tuab thiab moisturizer los txhim kho saj.

Cov xim thiab cov kua mem

HPMC muaj cov khoom zoo ua zaj duab xis thiab kev ruaj khov ntawm kev ncua thiab tuaj yeem siv rau:

Xim latex: txhim kho qhov txhuam thiab rheology ntawm cov xim thiab tiv thaiv kom tsis txhob muaj nag.

Kua mem: Txhim kho rheology thiab txhim kho qhov zoo ntawm kev luam ntawv.

Lwm cov ntawv thov

HPMC kuj tseem siv tau rau:

Kev lag luam ceramic: Ua ib qho binder, txhim kho lub zog ntawm cov khoom siv ceramic.

Kev Ua Liaj Ua Teb: Siv rau hauv kev ncua tshuaj tua kab thiab cov txheej txheem noob kom txhim kho kev ruaj khov ntawm tus neeg sawv cev.

Kev lag luam ua ntawv: Ua tus neeg sawv cev sizing, txhim kho qhov tsis kam dej thiab kev luam tawm ntawm daim ntawv.

HPMCyog cov khoom siv polymer ua haujlwm dav dav, siv dav hauv kev tsim kho, tshuaj, khoom noj, tshuaj txhua hnub, tshuaj pleev xim thiab lwm yam lag luam. Nws cov txheej txheem tsim khoom suav nrog kev kho cov khoom siv raw, alkalization, etherification, ntxuav, ziab, sib tsoo thiab lwm yam kauj ruam, txhua qhov txuas cuam tshuam rau qhov zoo ntawm cov khoom kawg. Nrog rau kev txhim kho ntawm cov kev cai tiv thaiv ib puag ncig thiab kev loj hlob ntawm kev thov ua lag luam, cov thev naus laus zis tsim khoom ntawm HPMC kuj tseem raug kho kom zoo dua kom tau raws li qhov xav tau ntawm ntau lub lag luam.