Kev npaj cov tshuaj pleev xim Hydroxypropyl Methylcellulose (HPMC) yog ib qho txheej txheem tseem ceeb hauv kev lag luam tshuaj thiab khoom noj. HPMC yog ib qho polymer siv ntau hauv cov tshuaj pleev xim vim nws cov khoom zoo heev, kev ruaj khov, thiab kev sib raug zoo nrog ntau yam khoom xyaw nquag. Cov tshuaj pleev xim yog siv los muab cov txheej tiv thaiv, tswj cov qauv tso tawm, thiab txhim kho qhov tsos thiab kev ua haujlwm ntawm cov ntsiav tshuaj, tshuaj ntsiav, thiab lwm yam tshuaj khov.
1. Cov Khoom Siv Yuav Tsum Muaj:
Hydroxypropyl Methylcellulose (HPMC)
Cov kuab tshuaj (feem ntau yog dej los yog sib tov dej thiab cawv)
Plasticizer (xaiv tau, los txhim kho qhov yooj ntawm zaj duab xis)
Lwm cov khoom ntxiv (xaiv tau, xws li cov xim, cov khoom ua kom tawv, lossis cov neeg sawv cev tiv thaiv kev sib xyaw)
2. Cov Khoom Siv Uas Xav Tau:
Lub thawv sib tov los yog lub thawv
Lub tshuab nplawm (mechanical los yog magnetic)
Kev ntsuas qhov hnyav
Qhov chaw cua sov (yog tias xav tau)
Siv lub tshuab lim (yog tias tsim nyog los tshem tawm cov pob)
Lub ntsuas pH (yog tias xav tau kev hloov kho pH)
Cov khoom siv kev nyab xeeb (hnab looj tes, tsom iav, tsho tiv no hauv chaw kuaj mob)
3. Txheej Txheem:
Kauj Ruam 1: Ntsuas Cov Khoom Xyaw
Ntsuas qhov ntau npaum li cas ntawm HPMC siv lub ntsuas qhov hnyav. Qhov ntau npaum li cas yuav txawv nyob ntawm qhov xav tau ntawm cov tshuaj pleev xim thiab qhov loj ntawm cov khoom.
Yog tias siv cov tshuaj plasticizer lossis lwm yam khoom ntxiv, ntsuas qhov ntau thiab tsawg uas xav tau thiab.
Kauj Ruam 2: Kev Npaj Cov Tshuaj Solvent
Txheeb xyuas hom tshuaj uas yuav siv raws li daim ntawv thov thiab kev sib xws nrog cov khoom xyaw nquag.
Yog tias siv dej ua cov kuab tshuaj, xyuas kom meej tias nws yog qhov huv si thiab zoo dua yog distilled lossis deionized.
Yog tias siv cov dej thiab cawv sib xyaw, txiav txim siab qhov sib piv tsim nyog raws li qhov solubility ntawm HPMC thiab cov yam ntxwv xav tau ntawm cov tshuaj pleev xim.
Kauj Ruam 3: Sib tov
Muab lub thawv sib tov rau ntawm lub stirrer thiab ntxiv cov tshuaj yaj.
Pib do cov tshuaj yaj ntawm qhov ceev nruab nrab.
Maj mam ntxiv cov hmoov HPMC uas tau hnyav ua ntej rau hauv cov tshuaj sib tov kom tsis txhob sib sau ua ke.
Txuas ntxiv do kom txog thaum cov hmoov HPMC tawg sib npaug hauv cov kuab tshuaj. Cov txheej txheem no yuav siv sijhawm me ntsis, nyob ntawm qhov concentration ntawm HPMC thiab qhov ua tau zoo ntawm cov khoom siv do.
Kauj Ruam 4: Kev Ua Kub (yog tias xav tau)
Yog tias HPMC tsis yaj tag ntawm chav sov, tej zaum yuav tsim nyog ua kom sov maj mam.
Ua kom sov thaum do kom txog thaum HPMC yaj tag. Ceev faj kom tsis txhob kub dhau, vim tias qhov kub ntau dhau tuaj yeem ua rau HPMC lossis lwm yam khoom ntawm cov tshuaj puas tsuaj.
Kauj Ruam 5: Ntxiv cov Plasticizer thiab lwm yam khoom ntxiv (yog tias siv tau)
Yog tias siv cov tshuaj plasticizer, maj mam ntxiv rau hauv cov tshuaj thaum do.
Ib yam li ntawd, ntxiv lwm yam khoom ntxiv xws li cov xim lossis cov opacifiers ntawm theem no.
Kauj Ruam 6: Kev Kho pH (yog tias tsim nyog)
Siv lub pH meter los ntsuas qhov pH ntawm cov tshuaj pleev xim.
Yog tias pH tsis nyob ntawm qhov xav tau vim yog qhov ruaj khov lossis kev sib haum xeeb, kho nws los ntawm kev ntxiv me me ntawm cov kua qaub lossis cov tshuaj yooj yim raws li qhov tsim nyog.
Do cov tshuaj kom zoo tom qab txhua zaus ntxiv thiab rov xyuas dua pH kom txog thaum tau txais qib xav tau.
Kauj Ruam 7: Kev Sib Tov thiab Kev Ntsuas Zaum Kawg
Thaum twg muab tag nrho cov khoom xyaw ntxiv rau hauv thiab sib tov kom huv si lawm, ces txuas ntxiv do ob peb feeb ntxiv kom paub tseeb tias nws sib xyaw zoo.
Ua txhua yam kev ntsuam xyuas zoo tsim nyog xws li kev ntsuas viscosity lossis kev tshuaj xyuas pom rau txhua yam cim ntawm cov khoom me me lossis kev sib cais theem.
Yog tias xav tau, muab cov tshuaj ntawd nchuav rau hauv lub lim kom tshem tawm cov pob lossis cov khoom me me uas tseem tsis tau yaj.
Kauj Ruam 8: Kev Khaws Cia thiab Ntim Khoom
Hloov cov tshuaj HPMC txheej uas tau npaj tseg rau hauv cov thawv cia khoom tsim nyog, zoo dua yog lub raj mis iav amber lossis cov thawv yas zoo.
Sau cov ntaub ntawv tsim nyog rau ntawm cov thawv xws li tus lej ntawm cov khoom ua ke, hnub npaj, kev sib xyaw, thiab cov xwm txheej khaws cia.
Khaws cov tshuaj no rau hauv qhov chaw txias, qhuav uas tiv thaiv kom tsis txhob muaj lub teeb thiab noo noo kom nws ruaj khov thiab siv tau ntev.
4. Cov Lus Qhia thiab Kev Xav Txog:
Ib txwm ua raws li cov kev coj ua zoo hauv chaw kuaj mob thiab cov lus qhia kev nyab xeeb thaum siv cov tshuaj thiab cov khoom siv.
Tswj kom huv si thiab tsis muaj kab mob thoob plaws hauv cov txheej txheem npaj kom tsis txhob muaj kuab paug.
Ua ntej siv ntau, sim seb cov tshuaj pleev xim puas sib haum nrog cov khoom siv uas xav tau (ntsiav tshuaj, tshuaj ntsiav).
Ua cov kev tshawb fawb txog kev ruaj khov los ntsuam xyuas qhov ua tau zoo mus sij hawm ntev thiab cov xwm txheej khaws cia ntawm cov tshuaj pleev xim.
Sau cov txheej txheem npaj thiab khaws cov ntaub ntawv rau lub hom phiaj tswj xyuas zoo thiab ua raws li txoj cai.
Lub sijhawm tshaj tawm: Lub Peb Hlis-07-2024