Hydroxypropyl Methylcellulose (HPMC)yog ib qho cellulose ether uas siv tau ntau yam hauv cov ntaub ntawv siv hauv kev tsim kho, tshuaj, khoom noj, thiab cov khoom siv tu tus kheej. Kev sib xyaw kom zoo ntawm HPMC yog qhov tseem ceeb heev kom ua tiav nws cov haujlwm tag nrho.
Kev Nkag Siab Txog Cov Khoom HPMC
Ua ntej sib tov HPMC, nws yog ib qho tseem ceeb kom nkag siab txog nws cov yam ntxwv tseem ceeb:
Kev yaj: HPMC yaj tau hauv dej txias tab sis tsis yaj hauv dej kub
Viscosity: Muaj nyob rau hauv ntau qib viscosity (los ntawm qis mus rau siab)
Kev Ua Haujlwm Ntawm Qhov Chaw: Ua haujlwm ua ib qho thickener thiab water retention agent
Thermal gelation: Tsim cov gels ntawm qhov kub siab (txawv ntawm qib)
Cov khoom no muaj feem cuam tshuam rau cov txheej txheem sib tov thiab kev ua tau zoo ntawm cov khoom kawg.
Kev Npaj Ua Ntej Sib Tov
1. Xaiv Qib HPMC Zoo
Xaiv qib HPMC tsim nyog raws li:
Cov kev cai thov (kev tsim kho, khoom noj, tshuaj)
Qhov viscosity xav tau
Qhov kub gelation xav tau
Qhov loj ntawm cov khoom me me (hmoov zoo los yog granular)
2. Cov Khoom Siv Sau Ua Ke
Lub thawv sib tov (hlau tsis xeb los yog yas)
Lub tshuab sib tov high-shear los yog lub tshuab sib tov propeller
Cov cuab yeej ntsuas ( nplai, cov thooj voos kheej kheej)
Kev tswj qhov kub thiab txias (rau qee qhov kev siv)
Lub npog ntsej muag plua plav thiab cov khoom siv tiv thaiv
3. Npaj Qhov Chaw Sib Tov
Xyuas kom meej tias qhov chaw ua haujlwm huv si thiab qhuav
Tswj cov av noo (cov av noo siab tuaj yeem ua rau muaj kev sib sau ua ke)
Khaws tag nrho cov khoom siv rau hauv chav sov tshwj tsis yog tias tau teev tseg lwm yam
Cov Kauj Ruam Sib Tov Cov Kauj Ruam
Txoj Kev 1: Kev Sib Tov Ncaj Qha (Feem ntau rau Cov Ntawv Thov Kev Tsim Kho)
Ntsuas dej: Txheeb xyuas qhov ntau ntawm cov dej uas xav tau raws li koj cov mis
Npaj lub tshuab sib tov: Pib lub tshuab sib tov los tsim lub vortex hauv dej
Maj mam ntxiv: Maj mam muab hmoov HPMC nchuav rau hauv lub vortex
Tus nqi ntxiv: 1-2% ntawm tag nrho cov hnyav sib tov ib feeb
Tsis txhob muab pov tseg ntau ntau ib zaug
Txuas ntxiv sib tov: Tom qab ntxiv tag nrho cov hmoov, sib tov rau:
15-30 feeb rau cov qib viscosity qis
30-45 feeb rau cov qib viscosity siab
Lub sijhawm ua kom dej noo: Cia cov tshuaj sawv rau:
20-30 feeb rau kev ua kom tiav dej
Ntev dua rau cov qib viscosity siab dua
Txoj Kev 2: Kev Faib Dej Kub/Txias (Rau Kev Haus Dej Sai Dua)
Ua kom dej kub: Ua kom 1/3 ntawm tag nrho cov dej kub txog 80-90°C
Disperse HPMC: Ntxiv HPMC rau hauv dej kub thaum do
Cov hmoov yuav tsis hydrate hauv dej kub tab sis yuav disperse
Ntxiv dej txias: Ntxiv 2/3 dej txias uas seem sai sai
Qhov kub poob sai ua rau muaj dej tam sim ntawd
Kev sib tov zaum kawg: Do rau 10-15 feeb kom txog thaum sib xws
Txoj Kev 3: Sib tov ua ntej nrog lwm cov hmoov (Rau cov hmoov qhuav)
Kev sib xyaw qhuav: Sib tov HPMC nrog lwm cov khoom xyaw qhuav ua ntej
Qhov piv txwv ib txwm muaj: 1 feem HPMC rau 4-5 feem lwm cov hmoov
Kev sib tov ntub: Ntxiv cov khoom qhuav sib tov rau hauv dej thaum sib tov
Qhov no tiv thaiv kev sib sau ua ke los ntawm kev sib cais cov khoom HPMC
Cov Kev Xav Tshwj Xeeb rau Cov Ntawv Thov Sib Txawv
Rau Cov Khoom Siv Hauv Tsev (Cov Nplaum Pobzeb, Cov Mortars)
Cov koob tshuaj ib txwm muaj: 0.1-1% ntawm tag nrho qhov hnyav
Sib tov nrog lwm cov khoom ntxiv ua ntej (cov hmoov uas tawg tau dua)
Xyuas kom meej tias muaj kev sib kis tag nrho kom tsis txhob muaj "ntses qhov muag"
Kho qhov ceev ntawm kev sib tov kom tsis txhob muaj cua nkag ntau dhau
Rau Cov Ntawv Thov Tshuaj
Siv cov dej huv
Tej zaum yuav xav tau kev kho mob kom huv si
Feem ntau ua ke nrog lwm cov neeg sawv cev ncua
Xav txog cov kev cai viscosity rau cov khoom kawg
Rau Cov Ntawv Thov Khoom Noj
Ua raws li cov lus qhia ntawm HPMC rau cov khoom noj khoom haus
Tej zaum yuav xav tau qhov kub thiab txias tshwj xeeb
Feem ntau ua ke nrog lwm cov hydrocolloids
Kev daws teeb meem ntawm cov teeb meem sib tov uas feem ntau tshwm sim
Teeb Meem 1: Qhov Muag Ntswg Los Yog Qhov Muag Ntses
Ua rau: Ntxiv tsis raug lossis sib tov tsis txaus
Kev daws teeb meem:
Ntxiv hmoov qeeb dua
Ua kom nrawm dua thaum sib tov
Siv txoj kev sib tov ua ntej nrog lwm cov hmoov
Teeb Meem 2: Haus dej tsis tag
Ua rau: Lub sijhawm sib tov tsis txaus lossis dej txias
Kev daws teeb meem:
Ntev lub sijhawm sib tov
Siv txoj kev dej kub/dej txias
Cia lub sijhawm sawv ntev dua
Teeb Meem 3: Ua Npuas Ncauj Ntau Dhau
Ua rau: Kev sib xyaw ua ke siab lossis cov khoom tsis huv
Kev daws teeb meem:
Txo qhov ceev ntawm kev sib tov
Siv cov tshuaj ua npuas dej yog tias tso cai
Xyuas kom cov khoom siv huv si
Teeb Meem 4: Kev Hloov Pauv Viscosity
Ua rau: Kev sib xyaw lossis kev ntsuas tsis sib xws
Kev daws teeb meem:
Ua kom cov txheej txheem sib tov zoo li qub
Xyuas seb dej zoo thiab kub npaum li cas
Txheeb xyuas qhov concentration ntawm HPMC
Cov Txuj Ci Sib Xyaws Siab Tshaj Plaws
1. Kev Sib Tov Nqus Tsev
Txo qhov cua nkag
Txhim kho qhov zoo ntawm kev sib kis
Siv rau hauv cov ntawv thov siab kawg
2. Kev Sib Tov Ntau Qib
Hydrate HPMC cais
Ntxiv lwm yam khoom hauv theem
Xyuas kom meej tias txhua yam khoom xyaw ua haujlwm zoo tshaj plaws
3. Kev Sib Tov Kub Uas Tswj Tau
Tswj qhov kub tshwj xeeb thaum lub sijhawm sib tov
Tseem ceeb rau qee cov ntawv thov tshuaj
Yuav tsum tau cov khoom siv tshwj xeeb
Kev Ceev Faj Txog Kev Nyab Xeeb
Kev Tiv Thaiv Tus Kheej:
Hnav lub npog ntsej muag thaum kov cov hmoov qhuav
Siv cov khoom tiv thaiv qhov muag
Hnav hnab looj tes yog tias kov cov khoom ntau dhau
Kev Tswj Xyuas Ib Puag Ncig:
Tsis txhob ua kom muaj huab plua plav
Xyuas kom muaj cua nkag tau zoo
Ntxuav cov dej nchuav tam sim ntawd
Kev Khaws Cia:
Khaws HPMC rau hauv lub thawv qub
Khaws cia rau qhov chaw txias, qhuav
Tsis txhob raug dej noo
Kev Tswj Xyuas Zoo
Kev Ntsuas Viscosity:
Siv lub ntsuas viscometer tig
Piv rau cov lus qhia tshwj xeeb
Tshawb xyuas ntawm qhov kub thiab txias
Kev Tshuaj Xyuas Pom:
Tshawb xyuas seb puas muaj cov pob lossis cov khoom me me uas tsis tau yaj
Xyuas kom meej qhov meej (rau cov qib purity siab)
Saib xyuas cov yam ntxwv ntawm kev ntws
Kev Ntsuas pH:
Feem ntau cov tshuaj HPMC yog pH nruab nrab
Kev hloov pauv loj heev yuav qhia tau tias muaj teeb meem
Kev sib xyaw ua ke zooHPMCyuav tsum tau ua tib zoo saib xyuas qib tshwj xeeb, cov kev cai thov, thiab cov xwm txheej sib tov. Los ntawm kev ua raws li cov txheej txheem ntxaws ntxaws no - xaiv txoj kev tsim nyog, tswj cov kev sib tov, thiab siv cov kev kuaj xyuas zoo - koj tuaj yeem npaj cov tshuaj HPMC zoo lossis cov khoom sib xyaw. Nco ntsoov tias qhov sib txawv me me hauv cov txheej txheem sib tov tuaj yeem cuam tshuam rau kev ua haujlwm ntawm HPMC hauv koj cov khoom kawg, yog li kev ua kom tus qauv ntawm cov txheej txheem sib tov yog qhov tseem ceeb rau cov txiaj ntsig rov ua dua.
Lub sijhawm tshaj tawm: Plaub Hlis-10-2025