Methylcellulose (MC) abu ne na yau da kullun na polymer da aka haɗa, wani ether cellulose da aka gyara wanda aka samu ta hanyar methylating na halitta cellulose. Saboda kaddarorinsa na zahiri da sinadarai na musamman, ana amfani da shi sosai wajen gine-gine, abinci, magunguna, kayan kwalliya, takarda da sutura.
1. Rarraba ta matakin canji
Matsayin maye gurbin (DS) yana nufin matsakaicin ƙimar ƙungiyoyin hydroxyl waɗanda ƙungiyoyin methyl suka maye gurbinsu akan kowace rukunin glucose a cikin methylcellulose. Akwai ƙungiyoyin hydroxyl guda 3 akan kowane zobe na glucose na ƙwayoyin cellulose waɗanda za a iya maye gurbinsu da ƙungiyoyin methyl. Saboda haka, matakin maye gurbin methylcellulose zai iya bambanta daga 0 zuwa 3. Dangane da matakin maye gurbin, methylcellulose za a iya raba zuwa kashi biyu: babban mataki na maye gurbin da ƙananan digiri na maye gurbin.
Matsayi mai girma na maye gurbin methylcellulose (DS> 1.5): Irin wannan samfurin yana da matsayi mai girma na maye gurbin methyl, don haka ya fi hydrophobic, yana da ƙananan solubility da kyakkyawan juriya na ruwa. Ana amfani da shi sau da yawa a cikin kayan gini, sutura da sauran lokuta waɗanda ke buƙatar wani digiri na hydrophobicity.
Ƙananan digiri na maye gurbin methylcellulose (DS <1.5): Saboda ƙarancin maye gurbin methyl, irin wannan samfurin ya fi hydrophilic, yana da mafi kyawun solubility kuma ana iya narkar da shi cikin ruwan sanyi. Ƙananan methylcellulose da aka maye gurbin ana amfani dashi sosai a cikin masana'antun abinci da magunguna a matsayin mai kauri, emulsifier da stabilizer.
2. Rarraba ta amfani
Dangane da amfani da methylcellulose a fagage daban-daban, ana iya raba shi zuwa rukuni biyu: methylcellulose na masana'antu da abinci da methylcellulose na magunguna.
Masana'antu methylcellulose: Yafi amfani a cikin yi, coatings, papermaking, yumbu da sauran masana'antu a matsayin thickener, m, film tsohon, ruwa retaining wakili, da dai sauransu A cikin gine-gine masana'antu, methylcellulose da ake amfani da sumunti da gypsum kayayyakin don inganta gina yi da kuma inganta aikin yi da kuma gypsum. karko; a cikin masana'antar sutura, methylcellulose na iya haɓaka kwanciyar hankali da rarrabuwa na sutura.
Abinci da methylcellulose na magunguna: Saboda kaddarorin sa masu guba da marasa lahani, ana amfani da methylcellulose azaman ƙari a cikin abinci da magani. A cikin abinci, methylcellulose shine mai kauri na yau da kullun da emulsifier wanda zai iya daidaita tsarin abinci kuma ya hana stratification ko rabuwa; a cikin magunguna, ana iya amfani da methylcellulose azaman harsashi na capsule, mai ɗaukar magunguna, kuma yana da aikin ci gaba da sakewa da magunguna. Amfaninsa da amincinsa sun sa methylcellulose ya shahara sosai a waɗannan fagage biyu.
3. Rarrabewa ta hanyar narkewa
Methylcellulose yafi kasu kashi biyu dangane da solubility: ruwan sanyi mai narkewa da nau'in kaushi mai narkewa.
Cold water soluble methylcellulose: Ana iya narkar da irin wannan nau'in methylcellulose a cikin ruwan sanyi don samar da bayani mai haske, mai danko bayan rushewa. Ana amfani da shi sau da yawa a cikin masana'antar abinci da magunguna azaman mai kauri ko tsohon fim. Solubility na irin wannan nau'in methylcellulose yana raguwa tare da ƙara yawan zafin jiki, don haka ana iya amfani da wannan fasalin don sarrafa gine-gine lokacin da aka yi amfani da shi a cikin masana'antar gine-gine.
Organic ƙarfi mai soluble methylcellulose: Irin wannan methylcellulose za a iya narkar da Organic kaushi da kuma sau da yawa amfani a fenti, coatings da sauran masana'antu filayen da bukatar kwayoyin lokaci kafofin watsa labarai. Saboda kyawawan abubuwan samar da fina-finai da juriya na sinadarai, ya dace da amfani a ƙarƙashin yanayin masana'antu masu ƙarfi.
4. Rarraba da nauyin kwayoyin halitta (dankowa)
Nauyin kwayoyin methylcellulose yana da tasiri mai mahimmanci akan kaddarorinsa na jiki, musamman ma aikin danko a cikin maganin. Dangane da nauyin kwayoyin halitta, ana iya raba methylcellulose zuwa nau'in danko mara nauyi da nau'in danko mai girma.
Ƙananan danko methylcellulose: Nauyin kwayoyin yana da ƙananan ƙananan kuma maganin danko yana da ƙasa. Ana amfani dashi sau da yawa a cikin abinci, magunguna da kayan kwalliya, galibi don emulsification, dakatarwa da kauri. Ƙananan danko methylcellulose na iya kula da ruwa mai kyau da daidaituwa, kuma ya dace da aikace-aikacen da ke buƙatar ƙananan ƙananan ƙwararru.
High-viscosity methylcellulose: Yana da babban nauyin kwayoyin halitta kuma yana samar da bayani mai girma-danko bayan rushewa. Ana amfani dashi sau da yawa a cikin kayan gini, sutura da mannen masana'antu. High-danko methylcellulose iya yadda ya kamata ƙara inji ƙarfi, sa juriya da adhesion na bayani, don haka shi ne yadu amfani a cikin kayan da bukatar high ƙarfi da high lalacewa juriya.
5. Rarraba ta matakin gyare-gyaren sinadarai
Methylcellulose wani sinadari ne na cellulose wanda aka gyara. Bisa ga hanyar gyare-gyare da digiri, ana iya raba shi zuwa cellulose na methyl guda ɗaya da kuma cellulose da aka gyara.
Single methyl cellulose: yana nufin ethers cellulose waɗanda aka maye gurbinsu da methyl kawai. Wannan nau'in samfurin yana da ingantattun kaddarorin jiki da sinadarai masu tsayayye, kuma solubility, kauri da kaddarorin yin fim suna da kyau.
Haɗin cellulose da aka gyara: Baya ga methylation, ana ƙara bi da shi ta hanyar sinadarai, kamar hydroxypropylation, ethylation, da sauransu, don samar da samfur ɗin da aka gyara. Alal misali, hydroxypropyl methylcellulose (HPMC) da kuma carboxymethyl cellulose (CMC). Wadannan gyare-gyaren celluloses yawanci suna da mafi kyawun solubility na ruwa, juriya na zafi da kwanciyar hankali, kuma suna iya daidaitawa zuwa nau'in buƙatun masana'antu.
6. Rarraba ta masana'antar aikace-aikacen
Faɗin aikace-aikacen methylcellulose yana ba da damar rarraba shi gwargwadon halayen aikace-aikacensa a cikin masana'antu daban-daban.
Masana'antar gine-gine methylcellulose: Ana amfani da su a cikin tushen siminti da kayan gypsum a matsayin mai riƙe ruwa da kauri. Yana iya haɓaka aikin kayan gini, hana asarar ruwa da wuri, da haɓaka ƙarfin injina na samfuran da aka gama.
Masana'antar abinci methylcellulose: A matsayin emulsifier, thickener da stabilizer a sarrafa abinci. Yana iya hana asarar ruwa, inganta dandano da tsarin abinci, da kuma ƙara tsawon rayuwar abinci.
Masana'antar harhada magunguna methylcellulose: A matsayin mai ɗaure kwamfutar hannu ko abin da aka ci gaba da fitarwa don magunguna. Hakanan za'a iya amfani da Methylcellulose a cikin shirye-shiryen magungunan gastrointestinal a matsayin mai lafiya da inganci mai ɗaukar magunguna.
Masana'antar kwaskwarima methylcellulose: A cikin samfuran kula da fata da kayan kwalliya, ana amfani da methylcellulose azaman mai kauri, emulsifier da moisturizer don taimakawa samfuran su samar da rubutu mai laushi da santsi yayin tsawaita sakamako mai laushi.
A taƙaice, akwai hanyoyi da yawa don rarraba methylcellulose, wanda za'a iya rarraba shi gwargwadon halayen tsarin sinadarai, ko kuma bisa ga filayen aikace-aikacensa da kaddarorin solubility. Waɗannan hanyoyin rarrabuwa daban-daban suna taimaka mana ƙarin fahimtar halaye da ayyukan methylcellulose, da kuma samar da tushen ka'idar aikace-aikacensa a fagage daban-daban.
Lokacin aikawa: Oktoba-23-2024