1. Cellulose yog dhau los ntawm D-glucopyranose β- Ib qho linear polymer tsim los ntawm kev sib txuas ntawm 1,4 glycoside bonds. Cov cellulose membrane nws tus kheej yog crystalline heev thiab tsis tuaj yeem gelatinized hauv dej los yog tsim rau hauv daim nyias nyias, yog li nws yuav tsum tau hloov kho. Cov hydroxyl dawb ntawm txoj haujlwm C-2, C-3 thiab C-6 endows nws nrog tshuaj lom neeg ua haujlwm thiab tuaj yeem ua oxidized cov tshuaj tiv thaiv, etherification, esterification thiab graft copolymerization. Lub solubility ntawm hloov cellulose tuaj yeem txhim kho thiab muaj cov yeeb yaj kiab zoo ua haujlwm.
2. Nyob rau hauv 1908, Swiss chemist Jacques Brandenberg npaj thawj cellulose zaj duab xis cellophane, uas pioneered txoj kev loj hlob ntawm niaj hnub pob tshab mos ntim cov ntaub ntawv. Txij li xyoo 1980s, tib neeg pib kawm hloov cellulose ua zaj duab xis thiab txheej. Hloov kho cellulose daim nyias nyias yog cov khoom siv membrane ua los ntawm cov derivatives tau tom qab kev hloov tshuaj ntawm cellulose. Cov ntaub ntawv no muaj lub zog tensile siab, yoog raws, pob tshab, roj tsis kam, tsis muaj ntxhiab thiab tsis qab, nruab nrab dej thiab oxygen tsis kam.
3. CMC yog siv nyob rau hauv cov khoom noj kib, xws li Fabkis fries, kom txo tau qhov nqus ntawm cov rog. Thaum nws siv ua ke nrog calcium chloride, cov nyhuv zoo dua. HPMC thiab MC tau siv dav hauv cov khoom noj khoom haus, tshwj xeeb tshaj yog nyob rau hauv cov zaub mov kib, vim lawv yog cov thermal gels. Nyob rau hauv teb chaws Africa, MC, HPMC, pob kws protein thiab amylose yog siv los thaiv cov roj edible nyob rau hauv sib sib zog nqus kib liab taum khob cij raws li cov zaub mov, xws li tshuaj tsuag thiab dipping cov raw cov ntaub ntawv daws rau cov taum liab pob los npaj edible films. Cov khoom siv dipped MC membrane yog qhov zoo tshaj plaws hauv cov roj teeb meem, uas tuaj yeem txo cov roj nqus los ntawm 49%. Feem ntau hais lus, cov qauv dipped qhia cov roj tsawg dua li cov tshuaj tsuag.
4. MCthiab HPMC kuj tseem siv rau hauv cov hmoov txhuv nplej siab xws li cov qos yaj ywm, batter, qos yaj ywm chips thiab khob noom cookie los txhim kho qhov kev ua tau zoo, feem ntau yog txau. Kev tshawb fawb qhia tau hais tias MC muaj qhov ua tau zoo tshaj plaws ntawm kev thaiv cov dej noo thiab roj.Nws lub peev xwm tuav dej yog vim nws qhov dej tsis tshua muaj zog. Los ntawm lub microscope, nws tuaj yeem pom tias MC zaj duab xis muaj qhov adhesion zoo rau cov zaub mov kib. Cov kev tshawb fawb tau pom tias HPMC txheej txau ntawm cov pob qaib muaj cov dej tuav tau zoo thiab tuaj yeem txo cov roj cov ntsiab lus thaum lub sij hawm kib. Cov ntsiab lus dej ntawm cov qauv zaum kawg tuaj yeem nce ntxiv los ntawm 16.4%, cov ntsiab lus ntawm cov roj tuaj yeem raug txo los ntawm 17.9%, thiab cov ntsiab lus ntawm cov roj tuaj yeem txo los ntawm 33.7%.HPMC. Nyob rau theem pib ntawm cov gel, cov viscosity nce sai heev, kev sib txuas sib txuas tau tshwm sim sai, thiab cov tshuaj gels ntawm 50-90 ℃. Cov gel txheej tuaj yeem tiv thaiv kev tsiv teb tsaws ntawm dej thiab roj thaum kib. Ntxiv hydrogel rau txheej txheej ntawm kib nqaij qaib strips dipped nyob rau hauv lub khob cij crumbs tuaj yeem txo qhov teeb meem ntawm cov txheej txheem kev npaj, thiab tuaj yeem txo cov roj nqus ntawm cov nqaij qaib mis thiab tswj cov khoom zoo ntawm cov qauv.
5. Txawm hais tias HPMC yog cov khoom siv zoo tshaj plaws uas siv tau nrog cov khoom siv zoo thiab cov dej vapor tsis kam, nws muaj kev lag luam me me. Muaj ob yam uas txwv nws daim ntawv thov: ua ntej, nws yog ib tug thermal gel, uas yog, ib tug viscoelastic khoom zoo li gel tsim nyob rau hauv high kub, tab sis muaj nyob rau hauv ib tug tov nrog tsawg viscosity nyob rau hauv chav tsev kub. Yog li ntawd, lub matrix yuav tsum tau preheated thiab qhuav ntawm qhov kub thiab txias thaum lub sij hawm npaj txheej txheem. Txwv tsis pub, nyob rau hauv cov txheej txheem ntawm txheej, txau los yog dipping, cov tshuaj yog ib qho yooj yim mus ntws, sib sau cov ntaub ntawv tsis sib xws ntawm zaj duab xis, cuam tshuam rau kev ua tau zoo ntawm edible films. Tsis tas li ntawd, qhov kev ua haujlwm no yuav tsum xyuas kom meej tias tag nrho cov rhiav kev tsim khoom tau khaws cia siab tshaj 70 ℃, nkim cua sov ntau. Yog li ntawd, nws yog tsim nyog los txo nws cov gel point los yog nce nws viscosity nyob rau hauv qis kub. Qhov thib ob, nws kim heev, txog 100000 yuan / tuj.
Post lub sij hawm: Apr-26-2024