CMC (sodium carboxymethyl cellulose) thiab HPMC (hydroxypropyl methyl cellulose) yog ob feem ntau siv cellulose derivatives, uas yog dav siv nyob rau hauv ntau yam lag luam. Raws li qhov twg yog qhov zoo dua, nws nyob ntawm qhov kev thov tshwj xeeb scenario thiab xav tau.
1. Cov khoom siv tshuaj
CMC yog anionic dej-soluble polymer compound tau los ntawm kev kho cov cellulose ntuj nrog sodium chloroacetate nyob rau hauv alkaline tej yam kev mob. Carboxymethyl pawg tau nkag mus rau hauv nws cov saw molecular, uas ua rau nws muaj dej solubility zoo thiab thickening zog.
HPMC yog non-ionic cellulose ether tau los ntawm reacting cellulose nrog methyl chloride thiab propylene oxide. Cov methoxy thiab hydroxypropoxy pawg nyob rau hauv cov qauv molecular ntawm HPMC muab nws zoo thickening, stability thiab dej tuav, thiab kuj zoo thermal gel zog.
2. Daim ntawv thov teb
Kev lag luam khoom noj khoom haus: CMC feem ntau siv rau hauv cov khoom noj ua cov thickener, stabilizer, suspending agent thiab emulsifier, thiab lwm yam, thiab feem ntau pom muaj nyob rau hauv yogurt, ice cream, jelly, dej haus thiab khoom ci. Nws tuaj yeem txhim kho qhov kev ntxhib los mos ntawm cov zaub mov thiab txuas ntxiv lub neej txee. Txawm hais tias HPMC tseem siv hauv kev lag luam khoom noj, nws yog siv los ua cov khoom noj khoom haus fiber ntau, tshwj xeeb tshaj yog nyob rau hauv qee cov khoom tsis muaj gluten.
Kev lag luam kws tshuaj: HPMC tau siv dav hauv kev lag luam tshuaj, tshwj xeeb tshaj yog hauv cov ntsiav tshuaj txheej, tshuaj tswj-tso tawm thiab tshuaj ntsiav tshuaj. Nws cov khoom tsis-ionic thiab zoo biocompatibility muab nws qhov tshwj xeeb zoo hauv kev xa tshuaj. CMC kuj tseem siv hauv kev lag luam tshuaj, tab sis ntau dua li cov thickener thiab nplaum rau cov tshuaj.
Kev tsim kho thiab txheej txheej kev lag luam: HPMC tau siv dav hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv mortar qhuav, gypsum, thiab putty hmoov, vim nws cov dej tuav tau zoo, thickening thiab anti-slip. CMC kuj muaj qee qhov kev siv hauv kev lag luam coatings, tab sis nws feem ntau yog siv los ua cov thickener rau cov dej-raws li txheej.
Tshuaj pleev ib ce thiab kev saib xyuas tus kheej: HPMC feem ntau siv rau hauv tshuaj pleev ib ce, tshwj xeeb tshaj yog nyob rau hauv cov tshuaj pleev ib ce, cream, tshuaj zawv plaub hau thiab tshuaj txhuam hniav, raws li ib tug thickener, emulsion stabilizer thiab moisturizer. CMC kuj tseem siv rau hauv daim ntawv thov zoo sib xws, tab sis nws cov nyhuv moisturizing tsis zoo li HPMC.
3. Cov yam ntxwv ua tau zoo
Dej solubility: CMC tuaj yeem yaj tau zoo hauv dej txias thiab kub, thaum HPMC yooj yim soluble hauv dej txias, tab sis insoluble hauv dej kub thiab muaj thermal gelation. Yog li, HPMC yog qhov tsim nyog rau cov khoom lag luam uas xav tau cov khoom siv thermal gelation hauv qee qhov kev siv, xws li cov tshuaj tswj-tso tawm hauv cov tshuaj.
Kev tswj viscosity: CMC muaj qhov viscosity tsawg thiab yooj yim los tswj, thaum HPMC muaj ntau yam viscosity thiab hloov tau ntau dua. HPMC tuaj yeem muab cov viscosity siab dua thiab nyob ruaj khov ntawm qhov sib txawv ntawm qhov kub thiab txias, uas ua rau nws muaj txiaj ntsig zoo hauv cov ntawv thov uas yuav tsum tau tswj cov viscosity meej.
Kev ruaj ntseg: HPMC muaj kev ruaj ntseg zoo dua li CMC. Nws qhia tau hais tias kev ruaj ntseg zoo nyob rau hauv acidic los yog alkaline ib puag ncig, thaum CMC yuav degrade nyob rau hauv muaj zog acids los yog muaj zog bases.
4. Nqe thiab nqi
Feem ntau, CMC kuj pheej yig thiab tsim nyog rau cov ntawv thov kev lag luam loj, thaum HPMC kuj tseem kim vim nws cov txheej txheem ntau lawm thiab tus nqi siab. CMC tej zaum yuav ntxim nyiam dua nyob rau hauv cov xwm txheej uas yuav tsum tau muaj ntau thiab tus nqi yog rhiab heev. Txawm li cas los xij, hauv qee qhov kev ua haujlwm siab, xws li tshuaj thiab tshuaj pleev ib ce siab, HPMC tseem siv dav vim nws qhov kev ua tau zoo tshwj xeeb txawm tias nws tus nqi siab.
5. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
Ob leeg CMC thiab HPMC muaj biodegradability zoo thiab kev tiv thaiv ib puag ncig, thiab tsis tshua muaj kev cuam tshuam rau ib puag ncig thaum siv. Ob leeg raug suav tias yog zaub mov muaj kev nyab xeeb thiab tshuaj ntxiv, thiab tuaj yeem siv tau zoo hauv ntau yam khoom tom qab kev saib xyuas nruj thiab ntawv pov thawj.
CMC thiab HPMC muaj lawv tus kheej qhov zoo thiab qhov tsis zoo, thiab nws tsis yooj yim sua kom hais tias qhov twg zoo dua. Rau cov ntawv thov uas xav tau tus nqi qis, kev tsim khoom loj, xws li kev lag luam zaub mov dav dav thiab cov kev xav tau yooj yim thickening, CMC yog qhov kev xaiv zoo. Hauv cov haujlwm uas yuav tsum tau ua haujlwm siab, xws li cov tshuaj tswj kev tso tawm, cov khoom siv hauv tsev siab thiab cov tshuaj pleev ib ce, HPMC tuaj yeem tsim nyog dua vim nws qhov kev ua tau zoo heev. Yog li, kev xaiv ntawm cov cellulose derivative yog nyob ntawm qhov kev thov tshwj xeeb, cov kev xav tau ntawm kev ua haujlwm thiab cov nqi txiav txim siab.
Post lub sij hawm: Aug-13-2024