Ana samun Carboxymethyl cellulose (CMC) bayan carboxymethylation na cellulose.Maganin sa na ruwa yana da ayyuka na thickening, samar da fim, mannewa, riƙewar ruwa, kariya ta colloid, emulsification da dakatarwa, da dai sauransu Ana amfani da shi sosai a cikin man fetur, abinci, magani , masana'antun yadi da takarda, yana daya daga cikin mafi mahimmancin ethers cellulose. .Natural cellulose shine mafi yawan rarraba kuma mafi yawan polysaccharide a cikin yanayi, kuma tushensa yana da wadata sosai.Fasahar gyare-gyare na yanzu na cellulose ya fi mayar da hankali kan etherification da esterification.Halin Carboxymethylation nau'in fasaha ne na etherification.
kaddarorin jiki
Sodium carboxymethylcellulose (CMC) ne anionic cellulose ether.Siffar sa fari ce ko ɗan rawaya flocculent fiber foda ko farin foda, mara wari, mara daɗi, kuma mara guba;yana da sauƙin narkewa a cikin ruwan sanyi ko ruwan zafi kuma yana haifar da ɗanɗano.m bayani.Maganin yana tsaka tsaki ko dan kadan alkaline, wanda ba zai iya narkewa a cikin ethanol, ether, isopropanol, acetone da sauran kaushi na kwayoyin halitta, amma mai narkewa a cikin 60% ethanol ko acetone bayani.Yana da hygroscopic kuma barga zuwa haske da zafi.Danko yana raguwa tare da karuwar zafin jiki.Maganin yana da ƙarfi a pH 2-10.Lokacin da pH ya yi ƙasa da 2, daskararru suna haɓaka.Lokacin da pH ya fi 10, danko yana raguwa.Matsakaicin zafin jiki shine 227 ° C, yanayin zafin carbonization shine 252 ° C, da tashin hankali na 2% maganin ruwa shine 71mn / n.
sinadaran Properties
Ana samunsa ta hanyar maganin cellulose tare da maye gurbin carboxymethyl, maganin cellulose tare da sodium hydroxide don samar da alkali cellulose, sa'an nan kuma amsa tare da monochloroacetic acid.Ƙungiyar glucose wadda ta ƙunshi cellulose tana da ƙungiyoyin hydroxyl guda uku waɗanda za a iya maye gurbinsu, don haka ana iya samun samfurori tare da digiri daban-daban na maye gurbin.A matsakaici, 1 mmol na ƙungiyar carboxymethyl a kowace gram 1 na busassun nauyi ba shi da narkewa a cikin ruwa da tsarma acid, amma ana iya kumbura kuma ana amfani dashi don musayar chromatography.Carboxymethyl pKa yana kusan 4 a cikin ruwa mai tsabta kuma kusan 3.5 a cikin 0.5mol/L NaCl.Yana da raunin acidic cation Exchanger kuma yawanci ana amfani dashi don rabuwa da tsaka tsaki da sunadarai 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 cikin ruwa don samar da ingantaccen maganin colloidal mai ƙarfi.
Babban manufar
Carboxymethylcellulose (CMC) ba mai guba ba ne, farin foda mai wari tare da ingantaccen aiki kuma yana da sauƙin narkewa cikin ruwa.Maganin sa mai ruwa da tsaki shine ruwa mai tsaka-tsaki ko alkaline mai bayyana danko, mai narkewa a cikin sauran manne da resins masu narkewa da ruwa, kuma maras narkewa a cikin kaushi na halitta kamar ethanol.Ana iya amfani da CMC azaman mai ɗaure, mai kauri, wakili mai dakatarwa, emulsifier, dispersant, stabilizer, wakili mai ƙima, da sauransu.
Sodium carboxymethyl cellulose (CMC) shine samfurin tare da mafi girman fitarwa, mafi girman kewayon amfani da mafi dacewa da amfani tsakanin ethers cellulose, wanda aka fi sani da "monosodium glutamate masana'antu".
1. Ana amfani da shi wajen hako mai da iskar gas, hakar rijiya da sauran ayyuka
① CMC-dauke da laka na iya sa bangon rijiyar ta samar da kek na bakin ciki da ƙarfi mai ƙarfi tare da ƙarancin haɓaka, rage asarar ruwa.
② Bayan an ƙara CMC a cikin laka, na'urar hakowa na iya samun ƙaramin ƙarfi na farko na farko, ta yadda laka za ta iya sakin iskar gas ɗin da aka nannade a cikinta cikin sauƙi, kuma a lokaci guda, za a iya zubar da tarkace cikin sauri a cikin ramin laka.
③ Haƙon laka, kamar sauran dakatarwa da tarwatsawa, yana da takamaiman rayuwa.Ƙara CMC na iya sanya shi kwanciyar hankali da tsawaita rayuwar shiryayye.
④ CMC-dauke da laka da wuya mold ya shafa, don haka ba lallai ba ne don kula da babban pH darajar da amfani da preservatives.
⑤ Ya ƙunshi CMC a matsayin wakili na jiyya don hako ruwan laka, wanda zai iya tsayayya da gurɓataccen gishiri daban-daban.
⑥ CMC-dauke da laka yana da kwanciyar hankali mai kyau kuma yana iya rage asarar ruwa ko da zafin jiki yana sama da 150 ° C.
CMC tare da babban danko da babban matsayi na maye gurbin ya dace da laka tare da ƙananan ƙima, kuma CMC tare da ƙananan danko da babban matsayi na maye gurbin ya dace da laka tare da babban yawa.Ya kamata a ƙayyade zaɓi na CMC bisa ga yanayi daban-daban kamar nau'in laka, yanki, da zurfin rijiyar.
2. Ana amfani da shi a masana'antar yadi, bugu da rini.A cikin masana'antar masana'anta, ana amfani da CMC azaman ma'auni don ƙirar yarn mai haske na auduga, ulun siliki, fiber na sinadarai, haɗuwa da sauran abubuwa masu ƙarfi;
3. An yi amfani da shi a cikin masana'antar takarda CMC za a iya amfani da shi azaman wakili mai laushi na takarda da ma'auni a cikin masana'antar takarda.Ƙara 0.1% zuwa 0.3% na CMC a cikin ɓangaren litattafan almara na iya ƙara ƙarfin juzu'i na takarda ta 40% zuwa 50%, ƙara yawan juriya ta 50%, kuma ƙara yawan kayan da aka yi da kullun ta hanyar 4 zuwa 5 sau.
4. CMC za a iya amfani da shi azaman adsorbent mai datti lokacin da aka ƙara zuwa kayan aikin roba;ana amfani da sinadarai na yau da kullun irin su masana'antar man goge baki CMC glycerol aqueous bayani ana amfani dashi azaman tushen gumakan haƙori;ana amfani da masana'antar harhada magunguna azaman thickener da emulsifier;Ana amfani da maganin ruwa na CMC azaman taso kan ruwa bayan kauri Mining da sauransu.
5. Ana iya amfani da shi azaman m, filastik, mai dakatarwa na glaze, mai gyara launi, da dai sauransu a cikin masana'antar yumbu.
6. An yi amfani da shi wajen ginawa don inganta haɓakar ruwa da ƙarfi
7. Ana amfani dashi a masana'antar abinci.Masana'antar abinci tana amfani da CMC tare da babban matsayi na maye gurbin a matsayin mai kauri don ice cream, abincin gwangwani, noodles nan take, da mai daidaita kumfa don giya.Don masu kauri, masu ɗaure ko wakilai masu dacewa.
8. A Pharmaceutical masana'antu zabi CMC tare da dace danko a matsayin mai ɗaure,
wakili mai tarwatsewa na allunan, da wakilin dakatarwa, da sauransu.
Lokacin aikawa: Nuwamba-24-2022