I-Ethyl cellulose(I-Ethyl cellulose ether), eyaziwa nangokuthi i-cellulose ether, ebizwa ngokuthi i-EC.
Ukwakheka kwamangqamuzana kanye nefomula yesakhiwo: [C6H7O2(OC2H5)3] n.
1.Ukusebenzisa
Lo mkhiqizo unemisebenzi yokuhlanganisa, ukugcwalisa, ukwakheka kwefilimu, njll. Usetshenziselwa amapulasitiki enziwe nge-resin, okokuhlanganisa, ama-rubber substitutes, oyinki, izinto ezivikelayo, futhi asetshenziswe njengama-adhesives, ama-textile finishing agents, njll., futhi angasetshenziswa njengezilwane kwezolimo kanye nemfuyo Isengezo sokuphakelayo, esisetshenziswa njenge-adhesive emikhiqizweni ye-elekthronikhi kanye ne-propellants yezempi.
2. Izidingo zobuchwepheshe
Ngokusetshenziswa okuhlukile, i-EC yokuhweba ingahlukaniswa izigaba ezimbili: ibanga lezimboni kanye nebanga lezemithi, futhi ngokuvamile iyancibilika kuzincibilikisi zemvelo. Okwebanga lezemithi le-EC, izinga layo lekhwalithi kufanele lihlangabezane nezindinganiso ze-Chinese Pharmacopoeia 2000 edition (noma i-USP XXIV/NF19 edition kanye ne-Japanese Pharmacopoeia JP standard).
3. Izakhiwo zomzimba namakhemikhali
1. Ukubukeka: I-EC iyimpushana yoketshezi olumpunga emhlophe noma ekhanyayo, ayinaphunga.
2. Izakhiwo: I-EC yezentengiselwano ngokuvamile ayincibiliki emanzini, kodwa incibilika kuzincibilikisi zemvelo ezihlukahlukene. Inokuqina okuhle kokushisa, okuqukethwe komlotha okuphansi kakhulu lapho kushisiwe, futhi ayivamisile ukunamathela noma ukuzwa i-astringent. Ingenza ifilimu eqinile. Isengakwazi ukulondoloza ukuguquguquka. Lo mkhiqizo awunabo ubuthi, unezindawo eziqinile zokulwa nebhayoloji, futhi awunawo amandla e-metabolic, kodwa uthambekele ekuwohlokeni kwe-oxidative ngaphansi kokukhanya kwelanga noma ukukhanya kwe-ultraviolet. Ngenhloso ekhethekile ye-EC, kukhona futhi izinhlobo ezincibilika ku-lye namanzi ahlanzekile. Ku-EC enezinga lokushintsha elingaphezu kuka-1.5, iyi-thermoplastic, enephuzu lokuthambisa elingu-135~155°C, indawo yokuncibilika engu-165~185°C, amandla adonsela phansi angama-pseudo angu-0.3~0.4 g/cm3, kanye nokuminyana okuhlobene kuka-1.07/3cm. Izinga le-etherification ye-EC lithinta ukuncibilika, ukumuncwa kwamanzi, izakhiwo zemishini kanye nezakhiwo ezishisayo. Njengoba izinga le-etherification likhula, ukuncibilika ku-lye kuncipha, kuyilapho ukuncibilika kuzinyibilikisi zemvelo kuyanda. Incibilika kuzincibilikisi eziningi eziphilayo. I-solvent evame ukusetshenziswa yi-toluene/ethanol njenge-4/1 (isisindo) esixubene se-solvent. Izinga le-etherification liyakhuphuka, indawo yokuthambisa kanye ne-hygroscopicity iyancipha, futhi izinga lokushisa lokusetshenziswa lingu-60°C~85°C. Amandla okuqina 13.7~54.9Mpa, ukumelana nevolumu 10*e12~10*e14 ω.cm
I-Ethyl cellulose (DS: 2.3-2.6) iyi-ether engeyona i-ionic cellulose engancibiliki emanzini kodwa encibilika kuzincibilikisi zemvelo.
1.Akulula ukushiswa.
2.Ukuzinza okuhle kwe-thermal kanye ne-thermos-plasticity enhle kakhulu.
3.Awushintshi umbala ube ukukhanya kwelanga.
4.Ukuguquguquka okuhle.
5.Izakhiwo ezinhle ze-dielectric.
I-6.Inokumelana okuhle kakhulu kwe-alkali nokumelana ne-asidi ebuthakathaka.
7.Ukusebenza okuhle kokuguga.
I-8.Ukumelana okuhle kukasawoti, ukumelana nokubanda kanye nokumelana nokumunca umswakama.
9.Izinzile kumakhemikhali futhi ngeke yonakale ekugcinweni kwesikhathi eside.
I-10.Ingakwazi ukuhambisana nama-resin amaningi futhi inokuhambisana okuhle nawo wonke ama-plasticizers.
11.Kulula ukushintsha umbala ngaphansi kwemvelo eqinile ye-alkaline nokushisa.
4. Indlela yokuhlakaza
Izinyibilikisi ezixubile ezivame ukusetshenziswa kakhulu ze-ethyl cellulose (DS: 2.3~2.6) ama-hydrocarbon anephunga elimnandi notshwala. I-aromatics ingaba i-benzene, i-toluene, i-ethylbenzene, i-xylene, njll., enenani lika-60-80%; utshwala kungaba methanol, ethanol, njll, ngenani 20-40%. Faka kancane kancane i-EC esitsheni esiqukethe i-solvent ngaphansi kokunyakaziswa kuze kube yilapho isimanzi ngokuphelele futhi incibilike.
Inombolo ye-CAS: 9004-57-3
5. Isicelo
Ngenxa yokungancibiliki kwamanzi,i-ethyl celluloseisetshenziswa kakhulu njenge-binder yethebhulethi kanye nezinto zokumboza ifilimu, njll., futhi ingasetshenziswa njengesivimbeli se-matrix ukuze kulungiswe izinhlobo ezahlukene zamathebulethi akhishwa okuqhubekayo e-matrix;
Isetshenziswa njengezinto ezixubile ukuze kulungiswe amalungiselelo okukhululwa okuqinile okuboshiwe kanye nama-pellets akhishwa okuqhubekayo;
Isetshenziswa njengezinto ezisizayo ze-encapsulation ukuze kulungiswe ama-microcapsules ahlala njalo, ukuze umphumela wezidakamizwa ukhululwe ngokuqhubekayo futhi uvimbele ezinye izidakamizwa ezincibilika emanzini ukuthi zisebenze ngaphambi kwesikhathi;
Ingasetshenziswa futhi njenge-dispersant, stabilizer, kanye ne-ejenti egcina amanzi ngezindlela ezihlukahlukene zemithamo yemithamo ukuze kuvinjelwe umswakama kanye nokuwohloka kwemithi kanye nokwenza ngcono ukugcinwa okuphephile kwamaphilisi.
Isikhathi sokuthumela: Apr-28-2024