Ethyl cellulose(Ethyl cellulose ether), kuma aka sani da cellulose ether, ake magana a kai a matsayin EC.
Tsarin kwayoyin halitta da tsarin tsari: [C6H7O2(OC2H5)3] n.
1.Amfani
Wannan samfurin yana da ayyuka na bonding, ciko, film forming, da dai sauransu Ana amfani da guduro roba robobi, coatings, roba madadin, tawada, insulating kayan, da kuma amfani da adhesives, yadi karewa jamiái, da dai sauransu, kuma za a iya amfani da matsayin dabba a noma da dabba kiwo Feed ƙari, amfani da matsayin m propellants na lantarki kayayyakin da soja.
2. Bukatun fasaha
Dangane da amfani daban-daban, ana iya raba EC da aka yi ciniki zuwa nau'i biyu: darajar masana'antu da darajar magunguna, kuma gabaɗaya suna narkewa a cikin kaushi. Don darajar EC, ingancin ingancinsa yakamata ya dace da ma'auni na Pharmacopoeia 2000 na kasar Sin (ko bugu na USP XXIV/NF19 da ma'aunin Pharmacopoeia JP na Japan).
3. Halin jiki da sinadarai
1. Bayyanar: EC fari ne ko launin toka mai haske foda, mara wari.
2. Properties: kasuwanci EC ne kullum insoluble a cikin ruwa, amma mai narkewa a daban-daban Organic kaushi. Yana da kwanciyar hankali mai kyau na zafi, ƙarancin toka sosai lokacin da aka kone, kuma da wuya ya ɗanɗana ko jin astringent. Zai iya samar da fim mai tauri. Har yanzu yana iya kiyaye sassauci. Wannan samfurin ba mai guba ba ne, yana da kaddarorin rigakafin ƙwayoyin cuta, kuma ba shi da ƙarfi, amma yana da haɗari ga lalatawar iskar oxygen a ƙarƙashin hasken rana ko hasken ultraviolet. Don maƙasudin EC na musamman, akwai kuma nau'ikan da ke narkewa a cikin lemun tsami da ruwa mai tsafta. Don EC tare da digiri na maye gurbin sama da 1.5, yana da thermoplastic, tare da maɓallin laushi na 135 ~ 155 ° C, ma'anar narkewa na 165 ~ 185 ° C, wani nau'i na musamman na 0.3 ~ 0.4 g / cm3, da kuma dangi na 1.07 ~ 1.18 g / cm 3. Matsayin etherification na EC yana rinjayar solubility, shayar ruwa, kayan inji da kaddarorin thermal. Yayin da matakin etherification ya karu, raguwa a cikin lye yana raguwa, yayin da mai narkewa a cikin kwayoyin halitta ya karu. Mai narkewa a yawancin kaushi na halitta. Maganin da aka saba amfani dashi shine toluene/ethanol azaman 4/1 (nauyi) gauraye da ƙarfi. Matsayin etherification yana ƙaruwa, wurin laushi da hygroscopicity yana raguwa, kuma zafin amfani shine -60 ° C ~ 85 ° C. Ƙarfin ƙarfi 13.7 ~ 54.9Mpa, ƙarfin juriya 10 * e12 ~ 10 * e14 ω.cm
Ethyl cellulose (DS: 2.3-2.6) shine ether cellulose maras ionic wanda ba zai iya narkewa a cikin ruwa amma mai narkewa a cikin kaushi na kwayoyin halitta.
1.Ba sauƙin ƙonewa ba.
2.Good thermal kwanciyar hankali da kyau kwarai thermos-plasticity.
3.Ba ya canza launi zuwa hasken rana.
4.Kyakkyawan sassauci.
5.Good dielectric Properties.
6.It yana da kyau kwarai juriya alkali da rauni acid juriya.
7.Good anti-tsufa yi.
8.Good gishiri juriya, sanyi juriya da danshi sha juriya.
9.It ne barga ga sunadarai kuma ba zai deteriorate a cikin dogon lokacin da ajiya.
10.It iya zama jituwa tare da yawa resins kuma yana da kyau karfinsu tare da duk plasticizers.
11.It ne sauki canza launi a karkashin karfi alkaline yanayi da zafi.
4. Hanyar rushewa
Abubuwan da aka fi amfani da su gauraye don ethyl cellulose (DS: 2.3 ~ 2.6) sune hydrocarbons na aromatic da alcohols. Aromatics na iya zama benzene, toluene, ethylbenzene, xylene, da dai sauransu, tare da adadin 60-80%; Alcohols na iya zama methanol, ethanol, da dai sauransu, tare da adadin 20-40%. A hankali ƙara EC a cikin akwati mai ɗauke da sauran ƙarfi a ƙarƙashin motsawa har sai an jika gaba ɗaya kuma ya narkar da shi.
Lambar CAS: 9004-57-3
5. Aikace-aikace
Saboda rashin narkewar ruwa.ethyl celluloseaka yafi amfani da matsayin kwamfutar hannu daure da fim shafi abu, da dai sauransu, kuma za a iya amfani da matsayin matrix abu blocker shirya daban-daban iri matrix ci-saki Allunan;
An yi amfani da shi azaman abin gauraye don shirya shirye-shiryen sakewa mai ɗorewa da ɗorewa-saki pellets;
Ana amfani dashi azaman kayan taimako na encapsulation don shirya ci gaba-saki microcapsules, don haka ana iya sakin tasirin miyagun ƙwayoyi gabaɗaya kuma ya hana wasu magunguna masu narkewar ruwa daga yin tasiri da wuri;
Hakanan za'a iya amfani dashi azaman mai watsawa, mai daidaitawa, da wakili mai riƙe ruwa a cikin nau'ikan nau'ikan nau'ikan magunguna daban-daban don hana danshi da lalacewar magunguna da haɓaka amintaccen ajiyar allunan.
Lokacin aikawa: Afrilu-28-2024