Methylcellulose (MC) wani nau'in cellulose ether ne. Kwayoyin cellulose ether sune abubuwan da aka samo ta hanyar gyaran sinadarai na cellulose na halitta, kuma methylcellulose wani muhimmin abu ne na cellulose wanda aka samar ta hanyar methylating (sauyawar methyl) ɓangaren hydroxyl na cellulose. Saboda haka, methylcellulose ba wai kawai wani abu ne na cellulose ba, har ma da wani abu ne na cellulose ether na yau da kullun.
1. Shiri na methylcellulose
Ana shirya Methylcellulose ta hanyar haɗa cellulose da wani wakili mai hana methylating (kamar methyl chloride ko dimethyl sulfate) a ƙarƙashin yanayin alkaline don methylate ɓangaren hydroxyl na cellulose. Wannan amsawar galibi tana faruwa ne akan ƙungiyoyin hydroxyl a matsayin C2, C3 da C6 na cellulose don samar da methylcellulose tare da matakan maye gurbin daban-daban. Tsarin amsawar shine kamar haka:
Cellulose (wani polysaccharide wanda ya ƙunshi sassan glucose) ana fara aiki da shi a ƙarƙashin yanayin alkaline;
Sannan ana gabatar da wani wakili mai hana methylation don yin aikin etherification don samun methylcellulose.
Wannan hanyar za ta iya samar da samfuran methylcellulose tare da bambance-bambancen viscosities da halayen narkewa ta hanyar daidaita yanayin amsawa da matakin methylation.
2. Halayen methylcellulose
Methylcellulose yana da waɗannan manyan kaddarorin:
Narkewa: Ba kamar cellulose na halitta ba, ana iya narkar da methylcellulose a cikin ruwan sanyi amma ba a cikin ruwan zafi ba. Wannan saboda gabatar da abubuwan maye gurbin methyl yana lalata haɗin hydrogen tsakanin ƙwayoyin cellulose, ta haka yana rage yawan lu'ulu'u. Methylcellulose yana samar da mafita mai haske a cikin ruwa kuma yana nuna halayen gelation a yanayin zafi mai yawa, wato, maganin yana kauri lokacin da aka dumama shi kuma yana sake samun ruwa bayan sanyaya.
Ba ya haifar da guba: Methylcellulose ba shi da guba kuma tsarin narkewar abinci na ɗan adam ba ya sha. Saboda haka, ana amfani da shi sau da yawa a cikin kayan abinci da magunguna a matsayin mai kauri, mai narkewar abubuwa da kuma mai daidaita su.
Tsarin Danko: Methylcellulose yana da kyawawan halaye na daidaita danko, kuma danko na maganin yana da alaƙa da yawan ruwan da kuma nauyin kwayoyin halitta. Ta hanyar sarrafa matakin maye gurbinsa a cikin amsawar etherification, ana iya samun samfuran methylcellulose masu kewayon danko daban-daban.
3. Amfani da methylcellulose
Saboda keɓantattun halayensa na zahiri da na sinadarai, ana amfani da methylcellulose sosai a masana'antu da yawa.
3.1 Masana'antar abinci
Methylcellulose wani ƙari ne na abinci da ake amfani da shi a fannoni daban-daban na sarrafa abinci, galibi a matsayin mai kauri, mai narkewar ruwa da kuma mai daidaita abinci. Tunda methylcellulose na iya yin gel idan aka dumama shi kuma ya dawo da ruwa bayan sanyaya, ana amfani da shi sau da yawa a cikin abincin daskararre, kayan gasa da miya. Bugu da ƙari, yanayin ƙarancin kalori na methylcellulose ya sa ya zama muhimmin sinadari a cikin wasu dabarun abinci masu ƙarancin kalori.
3.2 Masana'antun magunguna da na likitanci
Ana amfani da Methylcellulose sosai a masana'antar magunguna, musamman a fannin samar da kwamfutar hannu, a matsayin abin da ke ƙarawa da kuma ɗaurewa. Saboda kyawun ikon daidaita danko, yana iya inganta ƙarfin injina da halayen wargajewar ƙwayoyin cuta yadda ya kamata. Bugu da ƙari, ana amfani da methylcellulose a matsayin abin da ke cire hawaye na wucin gadi a fannin ido don magance bushewar idanu.
3.3 Masana'antar gini da kayan aiki
Daga cikin kayan gini, ana amfani da methylcellulose sosai a cikin siminti, gypsum, shafi da manne a matsayin mai kauri, mai riƙe ruwa da kuma fim ɗin da aka yi amfani da shi. Saboda kyawun riƙe ruwa, methylcellulose na iya inganta ruwa da aiki na kayan gini da kuma guje wa ƙirƙirar tsagewa da ɓarna.
3.4 Masana'antar kwalliya
Ana amfani da Methylcellulose a masana'antar kwalliya a matsayin mai kauri da kuma mai daidaita jiki don taimakawa wajen samar da emulsions da gels masu ɗorewa. Yana iya inganta jin daɗin samfurin kuma yana haɓaka tasirin danshi. Yana da rashin lafiyar jiki kuma mai laushi, kuma ya dace da fata mai laushi.
4. Kwatanta methylcellulose da sauran cellulose ethers
Kwayoyin Cellulose babban iyali ne. Baya ga methylcellulose, akwai kuma ethyl cellulose (EC), hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC) da sauran nau'ikan. Babban bambancinsu yana cikin nau'in da matakin maye gurbin abubuwan maye a cikin kwayar cellulose, wanda ke ƙayyade yadda suke narkewa, danko da kuma yankunan da ake amfani da su.
Methylcellulose vs Hydroxypropyl Methylcellulose (HPMC): HPMC sigar methylcellulose ce da aka inganta. Baya ga maye gurbin methyl, an kuma gabatar da hydroxypropyl, wanda hakan ke sa narkewar HPMC ta zama daban-daban. Ana iya narkar da HPMC a cikin kewayon zafin jiki mai faɗi, kuma zafin gelation ɗinsa na zafi ya fi na methylcellulose girma. Saboda haka, a cikin kayan gini da masana'antar magunguna, HPMC yana da fa'idodi da yawa.
Methylcellulose vs Ethyl Cellulose (EC): Ethyl cellulose ba ya narkewa a cikin ruwa, amma yana narkewa a cikin sinadarai masu narkewa na halitta. Sau da yawa ana amfani da shi a cikin kayan membrane mai dorewa don shafa da magunguna. Methyl cellulose yana narkewa a cikin ruwan sanyi kuma galibi ana amfani da shi azaman mai kauri da mai riƙe ruwa. Yankunan da ake amfani da shi sun bambanta da na ethyl cellulose.
5. Tsarin ci gaban ƙwayoyin cellulose
Tare da ƙaruwar buƙatar kayan aiki masu dorewa da sinadarai masu kore, mahaɗan cellulose ether, gami da methyl cellulose, suna zama muhimmin ɓangare na kayan da ba su da illa ga muhalli. An samo shi ne daga zaruruwan tsire-tsire na halitta, ana iya sabunta shi, kuma ana iya lalata shi ta halitta a cikin muhalli. A nan gaba, ana iya ƙara faɗaɗa wuraren amfani da cellulose ethers, kamar a cikin sabbin makamashi, gine-gine masu kore da kuma maganin biomedicine.
A matsayin wani nau'in cellulose ether, ana amfani da methyl cellulose sosai a masana'antu da yawa saboda keɓantattun halayensa na zahiri da na sinadarai. Ba wai kawai yana da kyakkyawan narkewa, rashin guba, da kuma kyakkyawan ikon daidaita danko ba, har ma yana taka muhimmiyar rawa a abinci, magani, gini da kayan kwalliya. A nan gaba, tare da ƙaruwar buƙatar kayan da ba su da illa ga muhalli, yuwuwar amfani da methyl cellulose zai faɗaɗa.
Lokacin Saƙo: Oktoba-23-2024