Ethyl cellulose(Ethyl cellulose ether), wanda kuma aka sani da cellulose ether, wanda aka sani da EC.
Tsarin kwayoyin halitta da tsarin tsari: [C6H7O2(OC2H5)3] n.
1. Amfani da
Wannan samfurin yana da ayyukan haɗawa, cikawa, samar da fim, da sauransu. Ana amfani da shi don robobi na roba na resin, shafa, maye gurbin roba, tawada, kayan rufewa, kuma ana amfani da shi azaman manne, wakilan kammala yadi, da sauransu, kuma ana iya amfani da shi azaman dabbobi a fannin noma da kiwon dabbobi. Ƙarin abinci, ana amfani da shi azaman manne a cikin kayayyakin lantarki da abubuwan da ke haifar da sojoji.
2. Bukatun fasaha
Dangane da amfani daban-daban, za a iya raba EC mai siyarwa zuwa rukuni biyu: matakin masana'antu da matakin magunguna, kuma gabaɗaya suna narkewa a cikin abubuwan narkewa na halitta. Don matakin magunguna EC, ƙimar ingancinsa yakamata ta cika ƙa'idodin bugu na Pharmacopoeia na China 2000 (ko bugu na USP XXIV/NF19 da ma'aunin Pharmacopoeia JP na Japan).
3. Sifofin jiki da sinadarai
1. Bayyanar: EC fari ne ko launin toka mai haske, ba shi da wari.
2. Halaye: EC da aka sayar da shi gabaɗaya ba ya narkewa a cikin ruwa, amma yana narkewa a cikin sinadarai daban-daban na halitta. Yana da kyakkyawan kwanciyar hankali na zafi, ƙarancin toka sosai lokacin da aka ƙone shi, kuma ba kasafai yake mannewa ko jin kamar yana da ƙarfi ba. Yana iya samar da fim mai tauri. Har yanzu yana iya kiyaye sassauci. Wannan samfurin ba shi da guba, yana da ƙarfi na hana halittu, kuma ba ya aiki a cikin metabolism, amma yana iya fuskantar lalacewar oxidative a ƙarƙashin hasken rana ko hasken ultraviolet. Don EC na musamman, akwai nau'ikan da ke narkewa a cikin lye da ruwa mai tsabta. Ga EC tare da matakin maye gurbin sama da 1.5, yana da thermoplastic, tare da wurin laushi na 135 ~ 155°C, wurin narkewa na 165 ~ 185°C, takamaiman nauyi na 0.3 ~ 0.4 g/cm3, da kuma yawan dangi na 1.07 ~ 1.18 g/cm3. Matsayin etherification na EC yana shafar narkewa, shan ruwa, halayen injiniya da halayen zafi. Yayin da matakin etherification ke ƙaruwa, narkewar ruwa a cikin lye yana raguwa, yayin da narkewar ruwa a cikin sinadarai masu narkewar ruwa ke ƙaruwa. Yana narkewa a cikin sinadarai masu narkewar ruwa da yawa. Maganin narkewar ruwa da aka saba amfani da shi shine toluene/ethanol yayin da ruwan narkewar ruwa mai gauraye 4/1 (nauyi) ya ƙaru. Matsayin etherification yana ƙaruwa, wurin laushi da hygroscopicity yana raguwa, kuma zafin amfani shine -60°C ~ 85°C. Ƙarfin tauri 13.7~54.9Mpa, juriyar girma 10*e12~10*e14 ω.cm
Ethyl cellulose (DS: 2.3-2.6) wani sinadari ne na cellulose wanda ba ionic ba wanda ba ya narkewa a cikin ruwa amma yana narkewa a cikin sinadarai masu narkewa na halitta.
1. Ba shi da sauƙin ƙonewa.
2. Kyakkyawan kwanciyar hankali na thermal da kuma kyakkyawan thermos-plasticity.
3. Ba ya canza launi zuwa hasken rana.
4. Kyakkyawan sassauci.
5. Kyakkyawan halayen dielectric.
6. Yana da juriyar alkali mai kyau da kuma juriyar acid mai rauni.
7. Kyakkyawan aikin hana tsufa.
8. Kyakkyawan juriya ga gishiri, juriya ga sanyi da juriya ga sha danshi.
9. Yana da daidaito ga sinadarai kuma ba zai lalace ba a adana shi na dogon lokaci.
10. Yana iya dacewa da resins da yawa kuma yana da kyakkyawan jituwa da duk masu amfani da filastik.
11. Yana da sauƙin canza launi a ƙarƙashin yanayin alkaline mai ƙarfi da zafi.
4. Hanyar narkewa
Mafi yawan sinadaran gauraye da ake amfani da su don ethyl cellulose (DS: 2.3~2.6) sune hydrocarbons masu ƙamshi da barasa. Ƙamshi na iya zama benzene, toluene, ethylbenzene, xylene, da sauransu, tare da adadin 60-80%; barasa na iya zama methanol, ethanol, da sauransu, tare da adadin 20-40%. A hankali a zuba EC a cikin akwati da ke ɗauke da sinadarin a ƙarƙashin juyawa har sai ya jike gaba ɗaya ya narke.
Lambar CAS: 9004-57-3
5. Aikace-aikace
Saboda rashin narkewar ruwa,ethyl cellulosegalibi ana amfani da shi azaman abin ɗaure kwamfutar hannu da kayan shafa fim, da sauransu, kuma ana iya amfani da shi azaman abin toshe kayan matrix don shirya nau'ikan allunan da ke dawwama na matrix;
Ana amfani da shi azaman kayan gauraye don shirya shirye-shiryen da aka shafa mai dorewa da kuma ƙwayoyin da aka saki mai ɗorewa;
Ana amfani da shi azaman kayan taimako na ɓoyewa don shirya ƙananan ƙwayoyin cuta masu sakin jiki mai ɗorewa, ta yadda tasirin maganin zai iya fitowa akai-akai kuma ya hana wasu magunguna masu narkewa cikin ruwa fara aiki da wuri;
Ana iya amfani da shi azaman mai wargazawa, mai daidaita jiki, da kuma wakili mai riƙe ruwa a cikin nau'ikan magunguna daban-daban don hana danshi da lalacewar magunguna da kuma inganta ajiyar allunan lafiya.
Lokacin Saƙo: Afrilu-28-2024