Hydroxyethyl cellulose (HEC) wani abu ne na polymer wanda ba na ionic ruwa mai narkewa wanda aka yi amfani da shi sosai a cikin kayan shafawa, magunguna, fenti, sutura, gini da sauran fannoni. Yana da kyau kwarai thickening, dakatar, watsawa, emulsification, film-forming, ruwa riƙewa da sauran kaddarorin, don haka ya zama wani muhimmin mataimaki a masana'antu da yawa. Duk da haka, hydroxyethyl cellulose ba a samo shi kai tsaye daga kayan halitta ba, amma ana samun su ta hanyar canza kwayoyin halitta cellulose. Don wannan karshen, don fahimtar asalin halitta na hydroxyethyl cellulose, da farko muna buƙatar fahimtar tushen da tsarin cellulose.
Halitta tushen cellulose
Cellulose yana daya daga cikin mafi yawan nau'in polymers a duniya kuma yana da yawa a cikin ganuwar tantanin halitta, musamman a cikin tsire-tsire masu tsire-tsire, auduga, flax da sauran filaye na shuka. Yana da mahimmanci a cikin tsarin shuka kuma yana ba da ƙarfin injiniya da kwanciyar hankali. Asalin naúrar cellulose shine ƙwayar glucose, wanda aka haɗa ta β-1,4-glycosidic bond don samar da tsarin sarkar mai tsawo. A matsayin kayan aikin polymer na halitta, cellulose yana da kyawawan kaddarorin jiki da sinadarai, yana mai da shi muhimmin albarkatun ƙasa don abubuwan da suka samo asali daban-daban.
Shiri tsari na hydroxyethyl cellulose
Kodayake cellulose kanta yana da kyawawan kaddarorin da yawa, kewayon aikace-aikacen sa yana iyakance zuwa wani yanki. Babban dalilin shi ne cewa cellulose yana da ƙarancin narkewa, musamman ƙarancin narkewa a cikin ruwa. Domin inganta wannan kadarorin, masana kimiyya suna canza sinadarai na cellulose don shirya abubuwan da suka samo asali na cellulose daban-daban. Hydroxyethyl cellulose shine ether cellulose mai narkewa da ruwa wanda aka samu ta hanyar ethoxylating na halitta cellulose ta hanyar sinadarai.
A cikin ƙayyadaddun tsari na shirye-shiryen, an fara narkar da cellulose na halitta a cikin maganin alkali, sa'an nan kuma an ƙara ethylene oxide zuwa tsarin amsawa. Ethoxylation dauki na ethylene oxide da hydroxyl kungiyoyin a cikin cellulose faruwa don samar da hydroxyethyl cellulose. Wannan gyare-gyare yana ƙara haɓakar hydrophilicity na sarƙoƙi na cellulose, don haka inganta haɓakar solubility da kaddarorin danko a cikin ruwa.
Babban tushen albarkatun kasa
Babban tushen albarkatun kasa don shirye-shiryen hydroxyethyl cellulose shine cellulose, kuma tushen asalin cellulose sun haɗa da:
Itace: Abubuwan cellulose a cikin itace suna da yawa, musamman a cikin itacen coniferous da faffadan ganye, inda cellulose zai iya kaiwa 40% -50%. Itace tana daya daga cikin mahimman hanyoyin samar da cellulose a masana'antu, musamman wajen yin takarda da kuma samar da abubuwan da ake samu na cellulose.
Auduga: Fiber ɗin auduga ya kusan haɗa da cellulose mai tsabta, kuma abun da ke cikin cellulose a auduga ya kai fiye da 90%. Saboda yawan tsarkinsa, ana amfani da fiber na auduga sau da yawa don shirya abubuwan da suka samo asali na cellulose masu inganci.
Filayen shuka irin su flax da hemp: Suma waɗannan filayen shuka suna da wadata a cikin cellulose, kuma saboda waɗannan filayen tsire-tsire galibi suna da ƙarfin injina sosai, suna da wasu fa'idodi a cikin hakar cellulose.
Sharar noma: ciki har da bambaro, bambaro alkama, bambaro masara, da dai sauransu. Waɗannan kayan sun ƙunshi adadin adadin cellulose, kuma ana iya fitar da cellulose daga gare su ta hanyar hanyoyin da suka dace, samar da tushe mai arha da sabuntawa na albarkatun ƙasa don samar da abubuwan da suka samo asali na cellulose. .
Yankunan aikace-aikace na hydroxyethyl cellulose
Saboda kaddarorin na musamman na hydroxyethyl cellulose, ana amfani da shi sosai a fannoni da yawa. Waɗannan su ne manyan wuraren aikace-aikacen da yawa:
Masana'antar Gina: Hydroxyethyl cellulose ana amfani dashi sosai a cikin kayan gini azaman mai kauri da mai riƙe ruwa, musamman a turmi siminti, gypsum, putty foda da sauran kayan, wanda zai iya inganta haɓakar kayan gini da kiyaye ruwa yadda yakamata.
Masana'antar sinadarai ta yau da kullun: A cikin wanki, samfuran kula da fata, shamfu da sauran samfuran sinadarai na yau da kullun, ana amfani da hydroxyethyl cellulose azaman mai kauri da daidaitawa don haɓaka ji da kwanciyar hankali samfurin.
Paints da coatings: A cikin masana'antun masana'antu, ana amfani da hydroxyethyl cellulose a matsayin mai kauri da mai kula da rheology don inganta aikin aiki na sutura kuma kauce wa sagging.
Pharmaceutical filin: A Pharmaceutical shirye-shirye, hydroxyethyl cellulose za a iya amfani da a matsayin mai ɗaure, thickener da suspending wakili ga Allunan don inganta saki halaye da kwanciyar hankali na kwayoyi.
Ko da yake hydroxyethyl cellulose ba abu ne na halitta ba, ainihin albarkatunsa, cellulose, yana da yawa a cikin tsire-tsire a yanayi. Ta hanyar gyare-gyaren sinadarai, cellulose na halitta za'a iya canza shi zuwa hydroxyethyl cellulose tare da kyakkyawan aiki kuma ana amfani dashi a cikin masana'antu daban-daban. Tsire-tsire na halitta kamar itace, auduga, flax, da dai sauransu suna ba da wadataccen tushen albarkatun ƙasa don samar da hydroxyethyl cellulose. Tare da ci gaban kimiyya da fasaha da karuwar bukatar masana'antu, aikin samar da sinadarin hydroxyethyl cellulose kuma ana ci gaba da inganta shi, kuma ana sa ran zai nuna kimarsa ta musamman a wasu fannonin nan gaba.
Lokacin aikawa: Oktoba-23-2024