Methylcellulose (MC) ndi chinthu chodziwika bwino chopangidwa ndi polima, chosinthika cha cellulose ether chomwe chimapezedwa ndi methylating cellulose yachilengedwe. Chifukwa cha mawonekedwe ake apadera akuthupi ndi mankhwala, amagwiritsidwa ntchito kwambiri pomanga, chakudya, mankhwala, zodzoladzola, mapepala ndi zokutira.
1. Kugawikana ndi mlingo wa kulowetsa m'malo
Digiri ya m'malo (DS) imatanthawuza kuchuluka kwa magulu a hydroxyl osinthidwa ndi magulu a methyl pagawo lililonse la shuga mu methylcellulose. Pali magulu atatu a hydroxyl pa mphete iliyonse ya shuga ya cellulose yomwe imatha kusinthidwa ndi magulu a methyl. Choncho, mlingo wa kulowetsedwa kwa methylcellulose ukhoza kusiyana kuchokera ku 0 mpaka 3. Malingana ndi mlingo wa kulowetsedwa, methylcellulose ikhoza kugawidwa m'magulu awiri: kulowetsedwa kwakukulu ndi kutsika kochepa.
Mkulu wa methylcellulose m'malo (DS> 1.5): Mtundu uwu wa mankhwala uli ndi digiri yapamwamba ya methyl substitution, choncho imakhala ya hydrophobic, imakhala ndi kusungunuka kochepa komanso kukana madzi abwino. Nthawi zambiri amagwiritsidwa ntchito pomanga, zokutira ndi zochitika zina zomwe zimafuna hydrophobicity.
Low digiri ya substitution methylcellulose (DS <1.5): Chifukwa chocheperako m'malo mwa methyl, mtundu uwu wa mankhwala ndi hydrophilic, umakhala wosungunuka bwino ndipo ukhoza kusungunuka m'madzi ozizira. Methylcellulose yotsika m'malo mwake imagwiritsidwa ntchito kwambiri m'mafakitale azakudya ndi zamankhwala monga thickener, emulsifier ndi stabilizer.
2. Gulu pogwiritsa ntchito
Malinga ndi kugwiritsa ntchito methylcellulose m'magawo osiyanasiyana, imatha kugawidwa m'magulu awiri: methylcellulose yamakampani ndi chakudya ndi mankhwala a methylcellulose.
Industrial methylcellulose: Amagwiritsidwa ntchito pomanga, zokutira, kupanga mapepala, zoumba ndi mafakitale ena monga thickener, zomatira, filimu wakale, madzi posungira wothandizila, etc. kukhazikika; mu makampani zokutira, methylcellulose akhoza kuonjezera bata ndi dispersibility wa zokutira.
Zakudya ndi mankhwala methylcellulose: Chifukwa cha zinthu zake zopanda poizoni komanso zopanda vuto, methylcellulose imagwiritsidwa ntchito ngati chowonjezera muzakudya ndi mankhwala. Mu chakudya, methylcellulose ndi wamba thickener ndi emulsifier kuti akhoza kukhazikika dongosolo chakudya ndi kupewa stratification kapena kupatukana; m'munda wamankhwala, methylcellulose ingagwiritsidwe ntchito ngati chipolopolo cha kapisozi, chonyamulira mankhwala, komanso imakhala ndi ntchito yotulutsa mankhwala osatha. Kukhazikika kwake ndi chitetezo kumapangitsa methylcellulose kukhala yotchuka kwambiri m'magawo awiriwa.
3. Gulu mwa kusungunuka
Methylcellulose amagawidwa m'magulu awiri mwa mawu a solubility: madzi ozizira sungunuka mtundu ndi organic zosungunulira sungunuka mtundu.
Madzi ozizira methylcellulose sungunuka: Mtundu uwu wa methylcellulose ukhoza kusungunuka m'madzi ozizira kuti apange njira yowonekera, yowoneka bwino pambuyo pa kusungunuka. Nthawi zambiri amagwiritsidwa ntchito m'mafakitale azakudya ndi mankhwala ngati thiener kapena filimu yakale. Kusungunuka kwa mtundu uwu wa methylcellulose kumachepa ndi kutentha kwakukulu, kotero mbaliyi ingagwiritsidwe ntchito poyang'anira ntchito yomanga ikagwiritsidwa ntchito pomanga.
Organic zosungunulira sungunuka methylcellulose: Mtundu uwu wa methylcellulose ukhoza kusungunuka mu zosungunulira organic ndipo nthawi zambiri ntchito utoto, zokutira ndi minda ina mafakitale amafuna organic gawo TV. Chifukwa cha mawonekedwe ake abwino opanga mafilimu komanso kukana kwa mankhwala, ndi oyenera kugwiritsidwa ntchito pansi pa zovuta zamakampani.
4. Gulu motengera kulemera kwa molekyulu (kukhuthala)
Kulemera kwa molekyulu ya methylcellulose kumakhudza kwambiri mphamvu zake zakuthupi, makamaka magwiridwe antchito a viscosity mu yankho. Malinga ndi kulemera kwa maselo, methylcellulose imatha kugawidwa m'magulu otsika kukhuthala komanso mtundu wapamwamba kwambiri wa viscosity.
Low mamasukidwe akayendedwe methylcellulose: Kulemera kwa maselo ndi kochepa ndipo kukhuthala kwa yankho ndikotsika. Nthawi zambiri amagwiritsidwa ntchito mu chakudya, mankhwala ndi zodzoladzola, makamaka emulsification, kuyimitsidwa ndi thickening. Low-viscosity methylcellulose amatha kukhalabe ndi madzi abwino komanso ofanana, ndipo ndi oyenera kugwiritsa ntchito zomwe zimafuna njira zochepetsera kukhuthala.
High-viscosity methylcellulose: Ili ndi kulemera kwakukulu kwa maselo ndipo imapanga yankho lapamwamba kwambiri pambuyo pa kusungunuka. Nthawi zambiri amagwiritsidwa ntchito muzomangamanga, zokutira ndi zomatira zamakampani. High-viscosity methylcellulose amatha kuonjezera mphamvu zamakina, kuvala kukana ndi kumamatira kwa yankho, motero amagwiritsidwa ntchito kwambiri pazinthu zomwe zimafuna mphamvu zambiri komanso kukana kwamphamvu kwambiri.
5. Gulu ndi mlingo wa kusintha kwa mankhwala
Methylcellulose ndi mankhwala opangidwa kuchokera ku cellulose. Malinga ndi njira yosinthira ndi digiri, imatha kugawidwa kukhala cellulose imodzi ya methyl ndi cellulose yosinthidwa.
Single methyl cellulose: imatanthawuza ma cellulose ether omwe amangolowetsedwa m'malo ndi methyl. Mtundu uwu wa mankhwala ali ndi mphamvu zokhazikika zakuthupi ndi mankhwala, ndipo kusungunuka kwake, kukhuthala ndi kupanga mafilimu ndi zabwino.
Ma cellulose osinthidwa: Kuphatikiza pa methylation, amathandizidwanso ndi mankhwala, monga hydroxypropylation, ethylation, etc., kuti apange mankhwala osinthidwa. Mwachitsanzo, hydroxypropyl methylcellulose (HPMC) ndi carboxymethyl cellulose (CMC). Ma cellulose osinthidwawa nthawi zambiri amakhala ndi kusungunuka kwamadzi bwino, kukana kutentha komanso kukhazikika, ndipo amatha kutengera zosowa zamafakitale.
6. Gulu ndi makampani ogwiritsira ntchito
Kugwiritsidwa ntchito kwakukulu kwa methylcellulose kumalola kuti igawidwe molingana ndi mawonekedwe ake m'mafakitale osiyanasiyana.
Makampani omanga methylcellulose: Amagwiritsidwa ntchito makamaka muzinthu zopangira simenti ndi gypsum monga chosungira madzi ndi thickener. Itha kusintha magwiridwe antchito a zida zomangira, kupewa kutaya madzi koyambirira, ndikuwonjezera mphamvu zamakina pazomalizidwa.
Makampani azakudya methylcellulose: Monga emulsifier, thickener ndi stabilizer pakukonza chakudya. Itha kuletsa kutayika kwa madzi, kukonza kukoma ndi kapangidwe ka chakudya, ndikuwonjezera moyo wa alumali wa chakudya.
Makampani opanga mankhwala a methylcellulose: Monga chomangira piritsi kapena chinthu chomasulidwa chokhazikika chamankhwala. Methylcellulose angagwiritsidwenso ntchito pokonza mankhwala m`mimba monga otetezeka ndi ogwira mankhwala chonyamulira.
Cosmetic industry methylcellulose: Mu mankhwala osamalira khungu ndi zodzoladzola, methylcellulose amagwiritsidwa ntchito ngati thickener, emulsifier ndi moisturizer kuthandiza mankhwala kupanga wosakhwima ndi wosalala mawonekedwe pamene kutalikitsa zotsatira moisturizer.
Mwachidule, pali njira zambiri zogawira methylcellulose, yomwe imatha kugawidwa molingana ndi mawonekedwe ake amankhwala, kapena molingana ndi magawo ake ogwiritsira ntchito komanso mphamvu zosungunuka. Njira zosiyanasiyana zogawira izi zimatithandiza kumvetsetsa bwino mawonekedwe ndi ntchito za methylcellulose, komanso kupereka maziko ongoganizira momwe amagwiritsidwira ntchito m'magawo osiyanasiyana.
Nthawi yotumiza: Oct-23-2024