Methylcellulose (MC) ndi Carboxymethylcellulose (CMC) ndi ma cellulose awiri omwe amagwiritsidwa ntchito kwambiri, amagwiritsidwa ntchito kwambiri mu chakudya, mankhwala, ntchito zomangamanga zamankhwala ndi minda ina. Ngakhale kuti onse amasinthidwa kuchokera ku cellulose wachilengedwe, pali zosiyana zazikulu za kapangidwe kake, zakuthupi ndi mankhwala, ndi mankhwala, ndi mapulogalamu.
1. Kapangidwe ka mankhwala ndi njira yokonzekera
Methylcellulose imapangidwa ndi cellulose yokhala ndi methyl chloride (kapena methanol) pansi pa mikhalidwe ya alkalinine. Panthawi imeneyi, gawo la magulu a hydroxyl (-Oh) mu ma molekyulu opanga ma cellulose amasinthidwa ndi magulu a methoxy (-Och₃) kupanga methylcellulose. Mulingo wazolowa (DS, kuchuluka kwa gawo la magaluti) a methylcellulose kuseweretsa mawonekedwe ake mwakuthupi ndi mankhwala, monga kusungunuka komanso mamasukidwe.
Carboxymethylcellulose imapangidwa ndi cellulose yokhala ndi acid a alkalinine mikhalidwe, ndipo gulu la hydroxyyl limasinthidwa ndi carboxymethyl (-ch₂cooh). Mulingo wa polowa m'malo mwa polymerization (DP) ya CMC imakhudza kusungunuka kwake ndikuwuyika m'madzi. CMC nthawi zambiri imakhala ndi mchere wa sodium, yotchedwa sodium carboxymethmethmethmelose (nacmc).
2. Mphamvu ndi mankhwala
Kusungunuka: Methyllulose imasungunuka m'madzi ozizira, koma kutaya kususuka ndikupanga gel m'madzi otentha. Kutembenuza kwamatenthedwe kumeneku kumapangitsa kuti azigwiritsa ntchito ngati thickener ndi gelling wothandizika pakudya. CMC imasungunuka m'madzi onse ozizira komanso otentha, koma mamasukidwe a yankho lake amachepetsa pamene kutentha kumawonjezeka.
Ma Isccess: Maonekedwe a zonse ziwirizi zimakhudzidwa ndi kuchuluka kwa kuchuluka kwa kuloweza ndi njira yothetsera mavuto. Makulidwe a MC woyamba amawonjezeka kenako amachepetsa pamene kutentha kumawonjezeka, pomwe mamasukidwe a CMC amachepetsa pamene kutentha kumawonjezeka. Izi zimawapatsa zabwino zawo zosiyanasiyana mafakitale osiyanasiyana.
Khalidwe la PH: CMC imangokhala yokhazikika pamafu osiyanasiyana, makamaka pansi pa mikhalidwe ya alkali, yomwe imapangitsa kuti ikhale yotchuka kwambiri ngati chitchinga komanso chimaliziro mu chakudya ndi mankhwala. MC imakhazikika pansi pa zosalowerera ndale komanso pang'ono mchere, koma zimasokoneza ma acid amphamvu kapena alkalis.
3. Magawo ogwiritsa ntchito
Makampani Ogulitsa Chakudya: Methyllulose nthawi zambiri amagwiritsidwa ntchito mu chakudya ngati thicker, emulsifier ndi kukhazikika. Mwachitsanzo, imatha kufanana ndi kukoma ndi kapangidwe ka mafuta popanga zakudya zamafuta ochepa. Carboxymethylcellulose amagwiritsidwa ntchito kwambiri m'mphepete mwa zakumwa, zinthu zophika ndi mkaka monga kukula ndi kukhazikika kwa kupatukana kwamadzi ndikusintha.
Makampani ogulitsa mankhwala: methyllulose imagwiritsidwa ntchito pokonza mapiritsi opanga mankhwala ngati binder ndi kusokonekera, komanso ngati wamoyo komanso woteteza ngati misozi ngati misozi. CMC imagwiritsidwa ntchito kwambiri mu mankhwala chifukwa cha kusabereka kwake, monga kukonzekera mankhwala omasulidwa ndi zomata m'maso.
Makampani omanga ndi makampani: MC imagwiritsidwa ntchito kwambiri pomanga zinthu zomanga ngati thiccener, wogulitsa madzi ndikumalimbikitsa simenti ndi gypsum. Itha kukonza zomangamanga ndi mawonekedwe apamwamba. CMC nthawi zambiri imagwiritsidwa ntchito mu mankhwala a matope mu migodi yamafuta, kusefukira pamatumba kusindikiza ndi kupaka utoto, zokutira zapamwamba, etc.
4. Chitetezo cha chitetezo ndi chilengedwe
Onsewa amadziwika kuti amagwiritsa ntchito chakudya ndi ntchito zamankhwala, koma magwero awo ndi njira zomwe zimapangidwa zimatha kukhala ndi zovuta zachilengedwe. Zida zopangira za MC ndi CMC zimachokera ku cellulose yachilengedwe ndipo ndi biodegrable, choncho amachita bwino malinga ndi mgwirizano wachilengedwe. Komabe, njira zawo zopanga zingakhudzire ma sol sol sol ndi ma reagents, omwe angakhudzidwe ndi chilengedwe.
5. Mtengo ndi msika
Chifukwa cha njira zosiyanasiyana zopangira, mtengo wopanga wa methylcelulose nthawi zambiri umakhala wokwera, kotero mtengo wake wamsika ndiwokwera kuposa carboxymellulose. CMC nthawi zambiri imakhala ndi ndalama zambiri pamsika chifukwa cha ntchito yake yonse komanso ndalama zochepa.
Ngakhale methylculose ndi carboxymethylcelulose ndi zochokera ku cellulose, zimakhala ndi kusiyana kwakukulu pamapangidwe, katundu, ntchito ndi zofunika pamsika. Methylcellulose imagwiritsidwa ntchito makamaka m'minda yazakudya, mankhwala ndi zida zomangira chifukwa cha kusinthika kwake kwapadera komanso kuwongolera kwambiri. Carboxymethyl cellulose yagwiritsidwa ntchito kwambiri mu chakudya, mankhwala, petrochem, nsalu ndi mafakitale ena chifukwa chosinthana ndi ma vidiyo. Kusankha kwa cellulose kutengera kachitidwe kazinthu kagwiritsidwe kake ndi zosowa zake.
Post Nthawi: Aug-20-2024