I. Gabatarwa
Hydroxyethyl Cellulose (HEC) wani nau'in polymer ne wanda ba shi da ionic mai narkewa wanda aka yadu a cikin hakar mai, sutura, gini, sinadarai na yau da kullun, yin takarda da sauran fannoni. Ana samun HEC ta hanyar gyare-gyaren sinadarai na cellulose, kuma kaddarorinsa da amfani da shi galibi ana ƙaddara su ta hanyar maye gurbin hydroxyethyl akan ƙwayoyin cellulose.
II. Tsarin samarwa
Tsarin samar da HEC ya ƙunshi matakai masu zuwa: etherification cellulose, wankewa, bushewa, bushewa da nika. Mai zuwa shine cikakken gabatarwa ga kowane mataki:
Cellulose etherification
Ana fara maganin Cellulose tare da alkali don samar da alkali cellulose (Cellulose Alkali). Yawancin lokaci ana aiwatar da wannan tsari a cikin injin daskarewa, ta amfani da maganin sodium hydroxide don magance cellulose na halitta don samar da alkali cellulose. Maganin sinadaran kamar haka:
Cell-OH+NaOH→Cell-O-Na+H2OCell-OH+NaOH→Cell-O-Na+H 2O
Sa'an nan, alkali cellulose reacts da ethylene oxide ya samar da hydroxyethyl cellulose. Ana aiwatar da aikin a ƙarƙashin babban matsin lamba, yawanci 30-100 ° C, kuma takamaiman matakin shine kamar haka:
Cell-O-Na+CH2CH2O→Cell-O-CH2CH2OHCell-O-Na+CH 2CH 2O→Cell-O-CH 2CH 2OH
Wannan amsa yana buƙatar daidaitaccen sarrafa zafin jiki, matsa lamba da adadin ethylene oxide da aka ƙara don tabbatar da daidaito da ingancin samfurin.
Wanka
Sakamakon danyen HEC yawanci ya ƙunshi alkali da ba a yi amfani da su ba, ethylene oxide da sauran samfuran da aka samu, waɗanda ke buƙatar cirewa ta hanyar wankewar ruwa da yawa ko wankin ƙarfi na halitta. Ana buƙatar ruwa mai yawa yayin aikin wanke ruwa, kuma ruwan datti bayan wanke yana buƙatar kulawa da fitar da shi.
Rashin ruwa
Rigar HEC bayan wankewa yana buƙatar bushewa, yawanci ta hanyar tacewa ko kuma rabuwa ta tsakiya don rage yawan danshi.
bushewa
An bushe HEC da ba ta da ruwa, yawanci ta bushewar feshi ko bushewar filasha. Dole ne a sarrafa zafin jiki da lokaci sosai yayin aikin bushewa don guje wa lalatawar zafin jiki mai girma ko haɓakawa.
Nika
Busashen HEC busasshen yana buƙatar ƙasa kuma a siffata don cimma daidaitaccen girman girman barbashi, sannan a samar da foda ko samfurin granular.
III. Halayen ayyuka
Ruwa mai narkewa
HEC yana da mai narkewar ruwa mai kyau kuma yana iya narke da sauri a cikin ruwan sanyi da ruwan zafi don samar da bayani mai haske ko haske. Wannan kayan solubility yana sanya shi amfani da ko'ina azaman thickener da stabilizer a cikin sutura da samfuran sinadarai na yau da kullun.
Kauri
HEC yana nuna tasiri mai ƙarfi mai ƙarfi a cikin maganin ruwa, kuma danko yana ƙaruwa tare da haɓakar nauyin kwayoyin halitta. Wannan dukiya mai kauri yana ba shi damar taka rawa wajen yin kauri, riƙe ruwa da inganta aikin gini a cikin rufin ruwa da ginin turmi.
Rheology
Maganin ruwa na HEC yana da kaddarorin rheological na musamman, kuma dankon sa yana canzawa tare da canjin juzu'i, yana nuna raguwar ƙarfi ko pseudoplasticity. Wannan kayan aikin rheological yana ba shi damar daidaita yawan ruwa da aikin gini a cikin sutura da ruwan hako mai.
Emulsification da dakatarwa
HEC yana da kyawawan emulsification da kaddarorin dakatarwa, wanda zai iya daidaita abubuwan da aka dakatar da su ko ɗigon ruwa a cikin tsarin watsawa don hana lalata da lalata. Sabili da haka, ana amfani da HEC sau da yawa a cikin samfurori irin su suturar emulsion da dakatarwar ƙwayoyi.
Halittar halittu
HEC wani nau'in cellulose ne na halitta tare da kyakkyawan biodegradability, babu gurɓataccen yanayi, kuma ya sadu da bukatun kare muhalli na kore.
IV. Filin Aikace-aikace
Rufi
A cikin ruwa na tushen ruwa, ana amfani da HEC azaman mai kauri da ƙarfafawa don inganta haɓakar ruwa, aikin gine-gine da kaddarorin anti-sagging na sutura.
Gina
A cikin kayan gini, ana amfani da HEC a cikin turmi mai tushe da siminti da foda don inganta aikin ginin da riƙe ruwa.
Daily Chemicals
A cikin kayan wanke-wanke, shamfu, da man goge baki, ana amfani da HEC azaman mai kauri da daidaitawa don haɓaka ji da kwanciyar hankali na samfur.
Filin mai
A cikin hakowa mai da fashewar ruwa, ana amfani da HEC don daidaita rheology da kaddarorin dakatarwa na hakowa da haɓaka haɓakar hakowa da aminci.
Yin takarda
A cikin tsarin yin takarda, ana amfani da HEC don sarrafa ruwa na ɓangaren litattafan almara da inganta daidaituwa da kaddarorin takarda.
Hydroxyethyl cellulose (HEC) da aka yadu amfani a da yawa masana'antu filayen saboda da kyau kwarai ruwa solubility, thickening, rheological Properties, emulsification da dakatar Properties, kazalika da kyau biodegradability. Tsarin samar da shi yana da ɗan ƙaramin girma. Ta hanyar matakai na etherification cellulose, wankewa, bushewa, bushewa da nika, ana iya shirya samfuran HEC tare da ingantaccen aiki da inganci mai kyau. A nan gaba, tare da inganta bukatun kare muhalli da ci gaban fasaha, aikace-aikacen da ake bukata na HEC zai kasance mafi girma.
Lokacin aikawa: Jul-02-2024