Methylcellulose (MC) da carboxymethylcellulose (CMC) abubuwa ne guda biyu da aka fi amfani da su a fannin abinci, magani, gini, masana'antar sinadarai da sauran fannoni. Duk da cewa an yi musu kwaskwarima ta hanyar sinadarai daga cellulose na halitta, akwai manyan bambance-bambance a tsarin sinadarai, halayen zahiri da na sinadarai, da kuma aikace-aikacensu.
1. Tsarin sinadarai da tsarin shiri
Ana samar da Methylcellulose ta hanyar yin martani ga cellulose tare da methyl chloride (ko methanol) a ƙarƙashin yanayin alkaline. A lokacin wannan tsari, ana maye gurbin wani ɓangare na ƙungiyoyin hydroxyl (-OH) a cikin ƙwayoyin cellulose da ƙungiyoyin methoxy (-OCH₃) don samar da methylcellulose. Matsayin maye gurbin (DS, adadin abubuwan maye gurbin kowane rukunin glucose) na methylcellulose yana ƙayyade halayensa na zahiri da na sinadarai, kamar narkewa da ɗanko.
Ana samar da Carboxymethylcellulose ta hanyar yin martani ga cellulose tare da chloroacetic acid a ƙarƙashin yanayin alkaline, kuma ana maye gurbin ƙungiyar hydroxyl da carboxymethyl (-CH₂COOH). Matsayin maye gurbin da matakin polymerization (DP) na CMC yana shafar narkewa da danko a cikin ruwa. CMC yawanci yana wanzuwa a cikin nau'in gishirin sodium, wanda ake kira sodium carboxymethylcellulose (NaCMC).
2. Sifofin jiki da na sinadarai
Narkewa: Methylcellulose yana narkewa a cikin ruwan sanyi, amma yana rasa narkewa kuma yana samar da gel a cikin ruwan zafi. Wannan juyewar zafi yana ba da damar amfani da shi azaman mai kauri da wakili mai narkewa a cikin sarrafa abinci. CMC yana narkewa a cikin ruwan sanyi da ruwan zafi, amma danko na maganin yana raguwa yayin da zafin jiki ke ƙaruwa.
Danko: Danko na duka biyun yana shafar matakin maye gurbin da yawan ruwan da ke cikinsu. Danko na MC yana farawa yana ƙaruwa sannan ya ragu yayin da zafin jiki ke ƙaruwa, yayin da danko na CMC ke raguwa yayin da zafin jiki ke ƙaruwa. Wannan yana ba su nasu fa'idodi a aikace-aikace daban-daban na masana'antu.
Daidaiton pH: CMC ya kasance mai karko a kan kewayon pH mai faɗi, musamman a ƙarƙashin yanayin alkaline, wanda hakan ya sa ya shahara sosai a matsayin mai daidaita da kauri a cikin abinci da magunguna. MC yana da karko a ƙarƙashin yanayin tsaka tsaki da ɗan alkaline, amma zai lalace a cikin acid mai ƙarfi ko alkaline.
3. Yankunan aikace-aikace
Masana'antar abinci: Ana amfani da Methylcellulose a abinci a matsayin mai kauri, mai narkewar ruwa da kuma mai daidaita abinci. Misali, yana iya kwaikwayon dandano da yanayin kitse yayin samar da abinci mai ƙarancin kitse. Ana amfani da Carboxymethylcellulose sosai a cikin abubuwan sha, kayan gasa da kayayyakin kiwo a matsayin mai kauri da mai daidaita abinci don hana rabuwar ruwa da inganta dandano.
Masana'antar harhada magunguna: Ana amfani da Methylcellulose wajen shirya allunan magunguna a matsayin abin ɗaurewa da wargazawa, da kuma a matsayin mai shafawa da kuma wakili mai kariya, kamar a cikin digon ido na ido a matsayin madadin hawaye. Ana amfani da CMC sosai a magani saboda kyakkyawan jituwarsa da halittu, kamar shirya magunguna masu dorewa da mannewa a cikin digon ido.
Masana'antar gini da sinadarai: Ana amfani da MC sosai a kayan gini a matsayin mai kauri, wakili mai riƙe ruwa da mannewa ga siminti da gypsum. Yana iya inganta aikin gini da ingancin saman kayan. Sau da yawa ana amfani da CMC a cikin maganin laka a haƙar mai, slurry a cikin buga yadi da rini, rufin takarda, da sauransu.
4. Tsaro da kare muhalli
Dukansu ana ɗaukar su a matsayin masu aminci don amfani a fannin abinci da magunguna, amma tushensu da hanyoyin samar da su na iya samun tasiri daban-daban ga muhalli. An samo kayan MC da CMC ne daga cellulose na halitta kuma suna iya lalacewa ta hanyar halitta, don haka suna aiki da kyau dangane da kyawun muhalli. Duk da haka, tsarin samar da su na iya haɗawa da sinadarai masu narkewa da reagents, waɗanda na iya yin tasiri ga muhalli.
5. Farashi da buƙatar kasuwa
Saboda hanyoyin samarwa daban-daban, farashin samar da methylcellulose yawanci yana da girma, don haka farashin kasuwa ma ya fi na carboxymethylcellulose. CMC gabaɗaya yana da buƙatar kasuwa mafi girma saboda yawan amfani da shi da kuma ƙarancin farashin samarwa.
Duk da cewa methylcellulose da carboxymethylcellulose dukkansu asalin cellulose ne, suna da bambance-bambance masu yawa a cikin tsari, halaye, aikace-aikace da kuma buƙatar kasuwa. Ana amfani da Methylcellulose galibi a fannin abinci, magani da kayan gini saboda yanayinsa na musamman na juyar da zafi da kuma kula da danko mai yawa. An yi amfani da Carboxymethyl cellulose sosai a cikin abinci, magani, sinadarai, yadi da sauran masana'antu saboda kyawun narkewarsa, daidaita danko da kuma daidaita pH mai faɗi. Zaɓin abin da aka samo daga cellulose ya dogara ne akan takamaiman yanayin aikace-aikacen da buƙatun.
Lokacin Saƙo: Agusta-20-2024