1.(HPMC) lub cev thiab tshuaj lom neeg:
1. Pom: MC yog xim dawb lossis tawv nqaij dawb lossis cov hmoov av zoo nkauj, tsw ntxhiab.
2. Cov Khoom: MC yuav luag tsis muaj kev tiv thaiv ethog, etherone. Sai sai ruam thiab o hauv dej kub ntawm 80 ~ 90 ° C, thiab yaj sai tom qab txias. Cov tshuaj aqueous yog qhov ruaj khov nyob rau hauv chav tsev kub, thiab tuaj yeem gel ntawm qhov kub thiab txias, thiab cov gel tuaj yeem hloov pauv nrog qhov ntsuas kub. Nws muaj cov wettity zoo heev, cov nplaum, thickeneness, emulsificeness, dej tuav thiab ua yeeb yaj kiab-ua yeeb yam, thiab impermility rau roj. Cov yeeb yaj kiab tsim muaj cov kev nruj dhau los, hloov tau yooj yim thiab pob tshab. Vim tias nws tsis yog-ionic, nws tuaj yeem sib haum nrog lwm qhov emulsifiers, tab sis nws yog qhov yooj yim rau ntsev tawm, thiab kev daws teeb meem yog ruaj khov nyob rau hauv ntau ntawm PH2-12.
3. Pom meej ntom ntom: 0.30-0.70g / cm³, ntom txog 1.3g / cm³.
2. Dissolving txoj kev:
Thaum MC cov khoom tau ncaj qha ntxiv rau dej, lawv yuav coaguling thiab tom qab ntawd yaj, tab sis kev sib nrauj yog qeeb heev thiab nyuaj. Muaj peb qho lus qhia txog cov kev qhia hauv qab no, thiab cov neeg siv tuaj yeem xaiv txoj kev yooj yim tshaj plaws raws li lawv siv:
1. Dej Dej Kub: Txij li MC tsis yaj hauv dej kub, MC tuaj yeem yog cov neeg kub, thiab tom qab ntawd thaum nws txias, ob txoj kev tau piav qhia raws li nram no:
1). Muab cov dej kub uas yuav tsum tau haus dej kub rau hauv lub thawv thiab cua sov nws txog 70 ° C. MC tau ntxiv me me ntxiv nyob rau hauv qeeb stirring, pib mc floated nyob rau saum npoo ntawm dej, thiab tom qab ntawd maj mam tsim ib tug slurry, uas tau txias hauv qab nplawm.
2). Ntxiv 1/3 lossis 2/3 ntawm qhov yuav tsum tau dej rau hauv lub ntim, thiab ua kom sov rau 70 ° C. Raws li txoj kev ntawm 1), Disperse Mc los npaj cov dej kub slurry; Tom qab ntawd ntxiv qhov seem ntawm cov dej txias lossis dej khov rau ib qho dej ntws ntawm cov dej kub, cov sib tov tau txias tom qab nplawm.
2.
3. Organic huab cua: Pre-disperse lossis ntub mc nrog cov tshuaj ethanol, thiab tom qab ntawd mc kuj muaj peev xwm ntxiv tau zoo nyob rau lub sijhawm no.
3. Siv:
Cov khoom no tau siv dav hauv kev tsim kho vaj tsev, cov tshuaj pleev ib ce, cov khoom siv ua kom zoo nkauj, ua yeeb yaj kiab ua yeeb yaj kiab, ua cov duab ua yeeb yaj kiab, ua cov yeeb yaj kiab-ua yeeb yaj kiab thiab tuab dua Nyob rau hauv lub txheej kev lag luam, thiab tseem muaj siv nyob rau hauv cov roj av tshuab hluav taws xob thiab txhua hnub kev lag luam txhua hnub.
Methylcellulose (MC) lub cev thiab tshuaj lom neeg:
1. Pom: MC yog xim dawb lossis tawv nqaij dawb lossis cov hmoov av zoo nkauj, tsw ntxhiab.
2. Cov Khoom: MC yuav luag tsis muaj kev tiv thaiv ethog, etherone. Sai sai disperses thiab swells hauv dej kub ntawm 80 ~ 90> ℃, thiab yaj sai sai tom qab txias. Cov tshuaj aqueous yog qhov ruaj khov nyob rau hauv chav tsev kub, thiab tuaj yeem gel ntawm qhov kub thiab txias, thiab cov gel tuaj yeem hloov pauv nrog qhov ntsuas kub. Nws muaj cov wettity zoo heev, cov nplaum, thickeneness, emulsificeness, dej tuav thiab ua yeeb yaj kiab-ua yeeb yam, thiab impermility rau roj. Cov yeeb yaj kiab tsim muaj cov kev nruj dhau los, hloov tau yooj yim thiab pob tshab. Vim tias nws tsis yog-ionic, nws tuaj yeem sib haum nrog lwm qhov emulsifiers, tab sis nws yog qhov yooj yim rau ntsev tawm, thiab kev daws teeb meem yog ruaj khov nyob rau hauv ntau ntawm PH2-12.
3. Pom meej ntom ntom: 0.30-0.70g / cm³, ntom txog 1.3g / cm³.
4. Dissolving txoj kev:
MC> Thaum cov khoom lag luam txuas ncaj qha ntxiv rau dej, nws yuav coaguling thiab tom qab ntawd yaj, tab sis kev sib cais yog qeeb heev thiab nyuaj. Muaj peb qho lus qhia txog cov kev qhia hauv qab no, thiab cov neeg siv tuaj yeem xaiv txoj kev yooj yim tshaj plaws raws li lawv siv:
1. Dej Dej Kub: Txij li MC tsis yaj hauv dej kub, MC tuaj yeem yog cov neeg kub, thiab tom qab ntawd thaum nws txias, ob txoj kev tau piav qhia raws li nram no:
1). Muab cov dej kub uas yuav tsum tau haus dej kub rau hauv lub thawv thiab cua sov nws txog 70 ° C. MC tau ntxiv me me ntxiv nyob rau hauv qeeb stirring, pib mc floated nyob rau saum npoo ntawm dej, thiab tom qab ntawd maj mam tsim ib tug slurry, uas tau txias hauv qab nplawm.
2). Ntxiv 1/3 lossis 2/3 ntawm qhov yuav tsum tau dej rau hauv lub ntim, thiab ua kom sov rau 70 ° C. Raws li txoj kev ntawm 1), Disperse Mc los npaj cov dej kub slurry; Tom qab ntawd ntxiv qhov seem ntawm cov dej txias lossis dej khov rau ib qho dej ntws ntawm cov dej kub, cov sib tov tau txias tom qab nplawm.
2.
3. Organic huab cua: Pre-disperse lossis ntub mc nrog cov tshuaj ethanol, thiab tom qab ntawd mc kuj muaj peev xwm ntxiv tau zoo nyob rau lub sijhawm no.
5. Siv:
Cov khoom no tau siv dav hauv kev tsim kho vaj tsev, cov tshuaj pleev ib ce, cov khoom siv ua kom zoo nkauj, ua yeeb yaj kiab ua yeeb yaj kiab, ua cov duab ua yeeb yaj kiab, ua cov yeeb yaj kiab-ua yeeb yaj kiab thiab tuab dua Nyob rau hauv lub txheej kev lag luam, thiab tseem muaj siv nyob rau hauv cov roj av tshuab hluav taws xob thiab txhua hnub kev lag luam txhua hnub.
Lub Sijhawm Post: Apr-24-2023