Ana samun Carboxymethyl cellulose (CMC) bayan carboxymethylation na cellulose. Maganin sa na ruwa yana da ayyuka na thickening, fim-forming, bonding, ruwa riƙewa, colloid kariya, emulsification da dakatarwa, kuma ana amfani da ko'ina a cikin man fetur, abinci, magani, da dai sauransu, yadi da takarda masana'antu, yana daya daga cikin mafi muhimmanci. cellulose ethers.Natural cellulose shi ne mafi yadu rarraba kuma mafi yawan polysaccharide a cikin yanayi, kuma tushensa suna da wadata sosai. Fasahar gyare-gyare na yanzu na cellulose ya fi mayar da hankali kan etherification da esterification. Carboxymethylation nau'in fasahar etherification ne.
kaddarorin jiki
Sodium carboxymethyl cellulose (CMC) ne anionic cellulose ether, tare da fari ko dan kadan rawaya flocculent fiber foda ko farin foda bayyanar, wari, m, mara guba; mai sauƙin narkewa a cikin ruwan sanyi ko ruwan zafi, yana samar da takamaiman bayani bayyananne. Maganin yana da tsaka tsaki ko dan kadan alkaline, wanda ba zai iya narkewa a cikin ethanol, ether, isopropanol, acetone da sauran kaushi na kwayoyin halitta, mai narkewa a cikin 60% ruwa mai dauke da ethanol ko acetone bayani. Yana da hygroscopic, barga zuwa haske da zafi, danko yana raguwa tare da haɓakar zafin jiki, maganin yana da ƙarfi a pH 2-10, pH yana ƙasa da 2, akwai hazo mai ƙarfi, kuma danko yana raguwa lokacin da pH ya fi 10. A discoloration zafin jiki ne 227 ℃, da carbonization zafin jiki ne 252 ℃, da kuma surface tashin hankali na 2% ruwa bayani ne. 71mn/n.
sinadaran Properties
An shirya shi daga abubuwan da suka samo asali na cellulose na masu maye gurbin carboxymethyl, suna magance cellulose tare da sodium hydroxide don samar da alkali cellulose, sa'an nan kuma amsa tare da monochloroacetic acid. Rukunin glucose wanda ya ƙunshi cellulose yana da ƙungiyoyin hydroxyl guda 3 waɗanda za a iya maye gurbinsu, don haka ana iya samun samfuran tare da digiri daban-daban na maye gurbin. A matsakaita, an gabatar da 1 mmol na carboxymethyl a kowace g 1 na busassun nauyi, wanda ba zai iya 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
Carboxymethyl cellulose (CMC) ba mai guba ba ne kuma farin foda mara wari tare da ingantaccen aiki kuma yana iya 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, da maras narkewa. a cikin kwayoyin kaushi kamar ethanol. Ana iya amfani da CMC azaman m, thickener, suspending wakili, emulsifier, dispersant, stabilizer, size wakili, da dai sauransu.
Sodium carboxymethyl cellulose (CMC) shine samfurin tare da mafi girma fitarwa, mafi yawan amfani da kuma mafi dacewa amfani tsakanin cellulose ethers, wanda aka fi sani da "monosodium glutamate masana'antu".
1. Ana amfani da shi wajen hako mai da iskar gas, hakar rijiyoyi da sauran ayyuka
① Laka mai dauke da CMC na iya sanya bangon rijiyar ya zama siriri mai tsauri kuma mai tsauri tare da ƙarancin ƙarfi, wanda ke 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, tarkace yana da sauri jefar a cikin ramin laka.
③Hano laka, kamar sauran tarwatsewar dakatarwa, yana da takamaiman lokacin wanzuwa, kuma ƙari na CMC na iya sa ya tsaya tsayin daka da tsawaita lokacin wanzuwa.
④ Laka da ke dauke da CMC yana da wuya a yi amfani da mold, don haka ba lallai ba ne don kula da ƙimar pH mai girma da amfani da masu kiyayewa.
⑤ Ya ƙunshi CMC a matsayin mai hakowa laka wankin ruwan magani, wanda zai iya tsayayya da gurɓata na daban-daban mai narkewa salts.
⑥ Laka mai dauke da CMC yana da kwanciyar hankali mai kyau kuma yana iya rage asarar ruwa ko da yawan zafin jiki yana sama da 150 ℃.
CMC tare da babban danko da babban matsayi na maye gurbin ya dace da laka tare da ƙananan yawa, 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 dashi a masana'antar yadi, bugu da rini. Masana'antun masana'anta suna amfani da CMC a matsayin ma'auni mai mahimmanci don ƙirar yarn mai haske na auduga, ulun siliki, fiber na sinadarai, gauraye da sauran abubuwa masu ƙarfi;
3. Amfani a cikin takarda masana'antu CMC za a iya amfani da takarda surface smoothing wakili da sizing wakili a takarda masana'antu. Ƙara 0.1% zuwa 0.3% CMC zuwa ɓangaren litattafan almara na iya haɓaka ƙarfin juzu'i na takarda ta 40% zuwa 50%, ƙara ƙaddamar da ƙaddamarwa ta 50%, kuma ƙara haɓaka 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 kamar masana'antar man goge baki CMC glycerin aqueous bayani ana amfani dashi azaman tushen ɗanko don man goge baki; ana amfani da masana'antar harhada magunguna azaman thickener da emulsifier; Maganin ruwa na CMC yana kauri kuma ana amfani dashi don sarrafa ma'adinai mai iyo, da sauransu.
5. A cikin masana'antar yumbu, ana iya amfani dashi azaman manne, filastik, wakili mai dakatarwa don glaze, mai gyara launi, da dai sauransu.
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 canji a matsayin mai kauri don ice cream, abincin gwangwani, noodles mai saurin dafawa, da mai daidaita kumfa don giya, da dai sauransu Don masu kauri, masu ɗaure ko abubuwan haɓakawa.
8. Masana'antar harhada magunguna ta zaɓi CMC tare da danko mai dacewa azaman mai ɗaure kwamfutar hannu, rarrabuwa, da wakili mai dakatarwa don dakatarwa.
Lokacin aikawa: Nov-03-2022