Cellulose ether wani nau'in polymer ne da aka yi daga cellulose na halitta ta hanyar gyaran sinadarai. Cellulose ether wani nau'in cellulose ne da aka samo daga cellulose na halitta. Samar da cellulose ether ya bambanta da polymers na roba. Mafi mahimmancin kayansa shine cellulose, wani mahaɗin polymer na halitta. Saboda takamaiman tsarin cellulose na halitta, cellulose kanta ba ta da ikon yin aiki tare da wakilan etherification. Duk da haka, bayan maganin maganin kumburi, haɗin hydrogen mai ƙarfi tsakanin sarƙoƙin kwayoyin halitta da sarƙoƙi suna lalacewa, kuma sakin ƙungiyar hydroxyl mai aiki ya zama cellulose mai amsawa. Sami cellulose ether.
Halayen ethers na cellulose sun dogara ne akan nau'in, adadi da rarrabawar abubuwan maye. Rarraba ether na cellulose kuma ana rarraba shi bisa ga nau'in abubuwan maye, matakin etherification, narkewa da halayen aikace-aikacen da suka shafi hakan. Dangane da nau'in abubuwan maye akan sarkar kwayoyin halitta, ana iya raba shi zuwa monoether da gauraye ether. MC da muke amfani da shi yawanci shine monoether, kuma HPMC gauraye ether ne. Methyl cellulose ether MC shine samfurin bayan an maye gurbin ƙungiyar hydroxyl akan sashin glucose na cellulose na halitta da methoxy. Samfuri ne da aka samu ta hanyar maye gurbin wani ɓangare na ƙungiyar hydroxyl akan naúrar tare da rukunin methoxy da wani ɓangare tare da rukunin hydroxypropyl. Tsarin tsarin shine [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEMC, waɗannan sune manyan nau'ikan da ake amfani da su sosai kuma ana sayarwa a kasuwa.
Dangane da narkewar sinadaran, ana iya raba shi zuwa ionic da non-ionic. Ethers cellulose marasa ionic masu narkewa cikin ruwa galibi sun ƙunshi jerin alkyl ethers guda biyu da hydroxyalkyl ethers. Ana amfani da Ionic CMC galibi a cikin sabulun sabulu na roba, buga yadi da rini, binciken abinci da mai. Ana amfani da Non-ionic MC, HPMC, HEMC, da sauransu galibi a cikin kayan gini, shafa latex, magani, sinadarai na yau da kullun, da sauransu. Ana amfani da su azaman mai kauri, wakilin riƙe ruwa, mai daidaita, mai wargazawa da wakilin samar da fim.
Gano ingancin cellulose ether:
Tasirin sinadarin methoxyl akan inganci: riƙe ruwa da aikin kauri
Ingancin tasirin hydroxyethoxyl/hydroxypropoxyl: mafi girman abun ciki, mafi kyawun riƙe ruwa.
Tasirin ingancin danko: mafi girman matakin polymerization, mafi girman danko kuma mafi kyawun riƙe ruwa.
Tasirin ingancin fineness: mafi ƙanƙanta watsawa da narkewa a cikin turmi, mafi sauri da daidaiton sa, kuma riƙe ruwa mai alaƙa ya fi kyau
Ingancin tasirin watsa haske: mafi girman matakin polymerization, mafi daidaiton matakin polymerization, da ƙarancin ƙazanta
Tasirin ingancin zafin gel: zafin gel don gini yana kusa da 75°C
Tasirin ingancin ruwa: <5%, cellulose ether yana da sauƙin sha danshi, don haka ya kamata a rufe shi a adana shi.
Tasirin ingancin toka: <3%, mafi girman tokar, haka nan ƙazanta ke ƙaruwa
Tasirin ingancin darajar PH: kusa da tsaka tsaki, cellulose ether yana da aiki mai ƙarfi tsakanin PH: 2-11
Lokacin Saƙo: Fabrairu-14-2023