Hydroxyethyl cellulose (HEC) shine ether nonionic cellulose ether mai narkewa da ruwa, kuma babban tushensa shine cellulose na halitta. Halitta cellulose yana yadu a cikin tsire-tsire kuma shine babban bangaren ganuwar tantanin halitta. Musamman, ana yin hydroxyethyl cellulose ta hanyar amsawa ta hanyar sinadarai na halitta cellulose tare da ethylene oxide a ƙarƙashin yanayin alkaline. Wannan tsarin halayen sinadaran yawanci ana kiransa ethoxylation, kuma sakamakon shine cewa ƙungiyoyin hydroxyl akan kwayoyin halittar cellulose na halitta an maye gurbinsu gaba ɗaya ko gaba ɗaya don samar da hydroxyethyl cellulose tare da ƙungiyoyin ethoxy.
Wadannan su ne takamaiman matakai na tsarin shiri na hydroxyethyl cellulose:
Tushen cellulose: Yawanci ana fitar da cellulose daga kayan shuka kamar auduga da itace. Selulose da aka fitar ana tsarkakewa kuma ana bleached don cire ƙazanta irin su lignin, hemicellulose da sauran abubuwan da ba na cellulose ba don samun cellulose mai tsafta.
Maganin Alkalinization: Mix cellulose tare da maida hankali sodium hydroxide (NaOH) bayani, da kuma hydroxyl kungiyoyin a cellulose amsa da sodium hydroxide don samar da sodium cellulose. A cikin wannan tsari, tsarin kwayoyin halitta na cellulose yana fadada zuwa wani matsayi, yana sa ya fi sauƙi don amsawa tare da ethylene oxide.
Ethoxylation dauki: Alkalized sodium cellulose an gauraye da ethylene oxide (C2H4O) a wani zazzabi da kuma matsa lamba. Tsarin zobe na ethylene oxide yana buɗewa don samar da ƙungiyoyin ethoxy (-CH2CH2OH), waɗanda ke haɗuwa tare da ƙungiyoyin hydroxyl akan ƙwayoyin cellulose don samar da hydroxyethyl cellulose. Ana iya aiwatar da wannan tsarin amsawa zuwa digiri daban-daban, wanda ke haifar da hydroxyethyl cellulose tare da digiri daban-daban na maye gurbin.
Bayan-jiyya: Samfurin bayan amsa yawanci yana ƙunshe da alkali marasa amsawa, kaushi da sauran samfuran da ba a yi ba. Domin samun tsantsar hydroxyethyl cellulose, ana buƙatar matakan jiyya irin su neutralization, wankewa da bushewa. Makasudin waɗannan matakan jiyya shine cire ragowar alkali, kaushi da samfuran samfuran don samun samfurin tsarkakewa na ƙarshe.
Hydroxyethyl cellulose an yi amfani da ko'ina a daban-daban masana'antu saboda ta musamman sinadaran Properties da kyau kwarai yi. Musamman, hydroxyethyl cellulose yana da kyakkyawan narkewar ruwa, kauri, kwanciyar hankali, yin fim da lubricity, kuma galibi ana amfani dashi a cikin fagage masu zuwa:
Kayan gini: A cikin kayan gini, ana amfani da hydroxyethyl cellulose galibi azaman mai kauri da mai riƙe ruwa don kayan tushen siminti da kayan tushen gypsum. Zai iya inganta aikin gine-gine na kayan aiki yadda ya kamata, inganta haɓakar ruwa, iya aiki da kuma hana turmi, tsawaita lokacin budewa da tabbatar da ci gaba mai kyau na ginin.
Masana'antar fenti: A cikin fenti, ana amfani da hydroxyethyl cellulose azaman mai kauri, wakili mai dakatarwa da emulsifier don haɓaka rheology da kwanciyar hankali na fenti, hana lalata launi, da haɓaka haɓakar laushi da sheki na shafi.
Kayan shafawa da samfuran kulawa na sirri: A cikin kayan kwalliya, ana amfani da hydroxyethyl cellulose sau da yawa azaman mai kauri, tsohon fim da mai ɗanɗano. Zai iya samar da samfurori tare da jin dadi mai kyau, inganta yanayin kwanciyar hankali da mannewa, da haɓaka sakamako mai laushi.
Masana'antar harhada magunguna: A cikin masana'antar harhada magunguna, ana amfani da hydroxyethyl cellulose azaman abin haɓakawa don shirye-shiryen magunguna. A matsayin wani ɓangare na dorewa-saki Allunan, fim coatings, da dai sauransu, zai iya sarrafa da saki na kwayoyi da kuma inganta kwanciyar hankali da bioavailability na kwayoyi.
Masana'antar abinci: A cikin masana'antar abinci, ana amfani da hydroxyethyl cellulose azaman ƙari na abinci don taka rawa wajen kauri, emulsification da daidaitawa. Ana amfani da shi sosai a cikin abubuwan sha, kayan abinci, kayan kiwo da sauran abinci don haɓaka laushi da ɗanɗano samfuran.
Hydroxyethyl cellulose kuma yana da mahimman aikace-aikace a cikin hakar mai, yin takarda, bugu na yadi da masana'antar rini. A cikin hakar mai, ana amfani da hydroxyethyl cellulose a matsayin mai kauri da stabilizer don hako ruwa, wanda zai iya inganta ƙarfin dakatarwa na hako ruwa da hana rushewar bangon rijiyar. A cikin masana'antar yin takarda, ana amfani da shi azaman mai riƙewa da ƙarfafawa don inganta ƙarfin da ƙarfin takarda. A cikin bugu na yadi da rini, ana amfani da hydroxyethyl cellulose azaman mai kauri don taimakawa bugu da rini slurry don rarraba daidai da haɓaka ingancin bugu da rini.
Ana samun hydroxyethyl cellulose daga cellulose na halitta ta hanyar jerin halayen sinadaran. Faɗin aikace-aikacensa ba wai kawai saboda kyawawan halayensa na zahiri da sinadarai ba, har ma saboda yana iya samar da mafita iri-iri a cikin masana'antu da yawa don saduwa da buƙatun fasaha daban-daban.
Lokacin aikawa: Agusta-13-2024