Ana samun Carboxymethyl cellulose (CMC) bayan carboxymethylation na cellulose. Maganin ruwa yana da ayyukan kauri, samar da fim, haɗawa, riƙe ruwa, kariyar colloid, emulsification da dakatarwa, kuma ana amfani da shi sosai a masana'antar mai, abinci, magani, da sauransu, yadi da takarda, yana ɗaya daga cikin mahimman ƙwayoyin cellulose. Cellulose na halitta shine polysaccharide mafi yaɗuwa kuma mafi yawan polysaccharide a yanayi, kuma tushen sa yana da wadata sosai. Fasahar gyara ta yanzu ta cellulose ta fi mayar da hankali kan etherification da esterification. Carboxymethylation wani nau'in fasahar etherification ne.
halayen jiki
Sodium carboxymethyl cellulose (CMC) wani sinadari ne na anionic cellulose ether, wanda ke da farin foda mai launin fari ko rawaya ko fari, ba shi da ƙamshi, ba shi da ɗanɗano, ba shi da guba; yana narkewa cikin sauƙi a cikin ruwan sanyi ko ruwan zafi, yana samar da wani bayani mai haske. Maganin yana tsaka tsaki ko ɗan alkaline, ba ya narkewa a cikin ethanol, ether, isopropanol, acetone da sauran sinadarai masu narkewa na halitta, yana narkewa a cikin maganin ethanol ko acetone mai ɗauke da ruwa 60%. Yana da hygroscopic, yana da daidaito ga haske da zafi, ɗanɗano yana raguwa tare da ƙaruwar zafin jiki, maganin yana da daidaito a pH 2-10, pH yana ƙasa da 2, akwai ruwan sama mai ƙarfi, kuma ɗanɗano yana raguwa lokacin da pH ya fi 10. Zafin canza launi shine 227℃, zafin carbonization shine 252℃, kuma matsin lamba na saman maganin ruwa na 2% shine 71mn/n.
kaddarorin sinadarai
Ana shirya shi daga abubuwan da aka samo daga cellulose na abubuwan maye gurbin carboxymethyl, ana shafa cellulose da sodium hydroxide don samar da alkali cellulose, sannan ana mayar da martani da monochloroacetic acid. Nau'in glucose wanda ya ƙunshi cellulose yana da ƙungiyoyi hydroxyl guda 3 waɗanda za a iya maye gurbinsu, don haka ana iya samun samfuran da ke da matakai daban-daban na maye gurbinsu. A matsakaici, an gabatar da 1 mmol na carboxymethyl a kowace 1 g na busasshen nauyi, wanda ba ya narkewa a cikin ruwa da acid mai narkewa, amma ana iya kumbura shi kuma ana amfani da shi don chromatography na musayar ion. Carboxymethyl pKa yana da kusan 4 a cikin ruwa mai tsabta kuma kusan 3.5 a cikin 0.5mol/L NaCl. Mai musayar cation ne mai rauni kuma yawanci ana amfani da shi don raba sunadaran tsaka tsaki da na asali a pH>4. Fiye da kashi 40% na ƙungiyoyin hydroxyl ana maye gurbinsu da ƙungiyoyin carboxymethyl, waɗanda za a iya narkar da su a cikin ruwa don samar da mafita mai ƙarfi ta colloidal.
Babban manufar
Carboxymethyl cellulose (CMC) foda ne mai launin fari mara guba kuma mara ƙamshi, yana da ƙarfi kuma yana narkewa cikin sauƙi a cikin ruwa. Maganin ruwansa ruwa ne mai laushi mai tsaka-tsaki ko alkaline, mai narkewa a cikin wasu manne da resins masu narkewa cikin ruwa, kuma ba ya narkewa a cikin sinadarai masu narkewa kamar ethanol. Ana iya amfani da CMC azaman manne, mai kauri, wakili mai dakatarwa, emulsifier, mai wargazawa, mai daidaita girma, da sauransu.
Sodium carboxymethyl cellulose (CMC) shine samfurin da ke da mafi girman fitarwa, mafi yawan amfani da shi kuma mafi dacewa a tsakanin cellulose ethers, wanda aka fi sani da "industrial monosodium glutamate".
1. Ana amfani da shi wajen haƙa mai da iskar gas, haƙa rijiyoyi da sauran ayyuka.
① Laka da ke ɗauke da CMC na iya sa bangon rijiyar ya zama sirara kuma mai ƙarfi tare da ƙarancin iskar shaka, wanda ke rage asarar ruwa.
② Bayan ƙara CMC a cikin laka, injin haƙa zai iya samun ƙarancin ƙarfin yankewa na farko, don haka laka zai iya sakin iskar gas da aka naɗe a cikinsa cikin sauƙi, kuma a lokaci guda, ana zubar da tarkacen cikin sauri a cikin ramin laka.
③Haƙar laka, kamar sauran watsawar dakatarwa, yana da wani lokaci na wanzuwa, kuma ƙara CMC na iya sa ya zama mai karko da kuma tsawaita lokacin wanzuwar.
④ Laka da ke ɗauke da CMC ba ta cika shafar mold ba, don haka ba lallai ba ne a kiyaye ƙimar pH mai yawa da amfani da abubuwan kiyayewa.
⑤ Ya ƙunshi CMC a matsayin maganin wanke laka, wanda zai iya tsayayya da gurɓatar gishiri daban-daban masu narkewa.
⑥ Laka da ke ɗauke da CMC yana da kyakkyawan kwanciyar hankali kuma yana iya rage asarar ruwa koda kuwa zafin jiki ya wuce 150℃.
CMC mai yawan danko da kuma babban matakin maye gurbin ya dace da laka mai ƙarancin yawa, kuma CMC mai ƙarancin danko da babban matakin maye gurbin ya dace da laka mai yawan yawa. Ya kamata a tantance zaɓin CMC bisa ga yanayi daban-daban kamar nau'in laka, yanki da zurfin rijiya.
2. Ana amfani da shi a masana'antar yadi, bugu da rini. Masana'antar yadi tana amfani da CMC a matsayin mai auna girman zare mai sauƙi na auduga, ulu na siliki, zare na sinadarai, gauraye da sauran kayan aiki masu ƙarfi;
3. Ana amfani da shi a masana'antar takarda CMC a matsayin mai laushi saman takarda da kuma mai auna girma a masana'antar takarda. Ƙara 0.1% zuwa 0.3% CMC zuwa ɓangaren litattafan zai iya ƙara ƙarfin taurin takardar da kashi 40% zuwa 50%, ƙara fashewar matsi da kashi 50%, da kuma ƙara ƙarfin murƙushewa da sau 4 zuwa 5.
4. Ana iya amfani da CMC a matsayin mai shaƙar datti idan aka ƙara shi a cikin sabulun wanke-wanke na roba; sinadarai na yau da kullun kamar masana'antar man goge baki Ana amfani da maganin ruwa na CMC glycerin a matsayin tushen ɗanko ga man goge baki; masana'antar magunguna ana amfani da shi azaman mai kauri da emulsifier; maganin ruwa na CMC yana kauri kuma ana amfani da shi don sarrafa ma'adinai masu iyo, da sauransu.
5. A masana'antar yumbu, ana iya amfani da shi azaman manne, mai hana filastik, mai hana ruwa don glaze, mai hana launi, da sauransu.
6. Ana amfani da shi a gini don inganta riƙe ruwa da ƙarfi
7. Ana amfani da shi a masana'antar abinci. Masana'antar abinci tana amfani da CMC mai babban matakin maye gurbin abinci a matsayin mai kauri ga ice cream, abincin gwangwani, taliyar da aka dafa cikin sauri, da kuma mai daidaita kumfa ga giya, da sauransu. Ga masu kauri, masu ɗaurewa ko abubuwan da ke ƙarawa.
8. Masana'antar magunguna ta zaɓi CMC mai ɗanko mai dacewa a matsayin abin ɗaure kwamfutar hannu, mai wargazawa, da kuma wakili mai dakatarwa don dakatarwa.
Lokacin Saƙo: Nuwamba-03-2022