Ethyl cellulose(I-Ethyl cellulose ether), ekwaziwa njenge-cellulose ether, ekubhekiselwa kuyo njenge-EC.
Ukubunjwa kweemolekyuli kunye nefomula yesakhiwo: [C6H7O2 (OC2H5) 3] n.
1.Ukusebenzisa
Le mveliso inemisebenzi yokudibanisa, ukuzaliswa, ukubunjwa kwefilimu, njl. Isetyenziselwa i-resin synthetic plastics, i-coatings, i-rubber substitutes, i-inki, izinto zokugquma, kwaye isetyenziswe njenge-adhesive, i-textile finishing agents, njl.
2. Iimfuno zobugcisa
Ngokokusetyenziswa okwahlukeneyo, i-EC yorhwebo inokohlulwa ibe ngamacandelo amabini: ibakala lemizi-mveliso kunye nebakala lamayeza, kwaye ngokubanzi ziyanyibilika kwizinyibilikisi zendalo. Kwibakala le-EC lamayeza, umgangatho walo womgangatho kufuneka uhlangabezane nemigangatho ye-Chinese Pharmacopoeia 2000 edition (okanye i-USP XXIV/NF19 edition kunye ne-Japan Pharmacopoeia JP standard).
3. Iimpawu zomzimba kunye neekhemikhali
1. Imbonakalo: I-EC imhlophe okanye i-gray powder powder ekhanyayo, ayinavumba.
2. Iipropathi: i-EC yorhwebo ayinyibiliki ngokubanzi emanzini, kodwa inyibilika kwizinyibilikisi ezahlukeneyo zezinto eziphilayo. Inozinzo olululo lwe-thermal, isiqulatho sothuthu esiphantsi kakhulu xa sitshisiwe, kwaye ayifane incamathele okanye ivakalelwe kukuba ine-astringent. Inokwenza ifilimu enzima. Isenokugcina ukuba bhetyebhetye. Le mveliso ayinayo ityhefu, inezixhobo ezinamandla ezichasene ne-biological, kwaye i-inert ye-metabolically inert, kodwa ijwayele ukuthotywa kwe-oxidative phantsi kokukhanya kwelanga okanye ukukhanya kwe-ultraviolet. Ngenjongo eyodwa ye-EC, kukho iindidi ezinyibilikayo kwi-lye kunye namanzi acocekileyo. Kwi-EC kunye neqondo lokutshintshela ngaphezu kwe-1.5, i-thermoplastic, kunye ne-softening point ye-135 ~ 155 ° C, i-melting point ye-165 ~ 185 ° C, i-pseudo ethile ye-gravity ye-0.3 ~ 0.4 g / cm3, kunye nobuninzi be-1.07 / 3 cm. Iqondo le-etherification ye-EC lichaphazela ukunyibilika, ukufunxa kwamanzi, iipropati zomatshini kunye neempawu zokushisa. Njengoko iqondo le-etherification lisanda, ukunyibilika kwi-lye kuncipha, ngelixa ukunyibilika kwizinyibilikisi ze-organic kukhula. Inyibilika kwizinyibilikisi ezininzi eziphilayo. I-solvent esetyenziswa ngokuqhelekileyo yi-toluene/ethanol njenge-4/1 (ubunzima) i-solvent exutyiweyo. Iqondo lokunyuka kwe-etherification liyanda, i-softening point kunye ne-hygroscopicity iyancipha, kwaye ubushushu bokusebenzisa ngu-60 ° C ~ 85 ° C. Amandla e-tensile 13.7 ~ 54.9Mpa, ukuxhathisa umthamo 10 * e12 ~ 10 * e14 ω.cm
I-Ethyl cellulose (DS: 2.3-2.6) yi-ether ye-cellulose engekho i-ionic enganyibiliki emanzini kodwa i-soluble kwi-solvents eziphilayo.
1.Akukho lula ukutshisa.
2.Ukuzinza okuhle kwe-thermal kunye ne-thermos-plasticity egqwesileyo.
3.Ayitshintshi umbala kukukhanya kwelanga.
4.Ukuguquguquka okuhle.
5.Iipropati ezilungileyo ze-dielectric.
I-6.Inokumelana okugqwesileyo kwe-alkali kunye nokuxhatshazwa kwe-asidi ebuthakathaka.
7.Ukusebenza kakuhle kokuchasana nokuguga.
I-8.Ukumelana netyuwa elungileyo, ukumelana nokubanda kunye nokuxhathisa ukufunxa ukufuma.
I-9.Izinzile kwiikhemikhali kwaye ayiyi konakala kwisitoreji sexesha elide.
I-10.Inokuhambelana neerasi ezininzi kwaye inokuhambelana kakuhle nazo zonke iiplastiki.
11.Kulula ukutshintsha umbala phantsi kommandla oqinileyo we-alkaline kunye nobushushu.
4. Indlela yokuphelisa
Awona machiza asetyenziswa ngokuqhelekileyo axutyiweyo e-ethyl cellulose (DS: 2.3 ~ 2.6) ziihydrocarbons ezinuka kamnandi kunye neealkoholi. I-aromatics ingaba yibenzene, toluene, ethylbenzene, xylene, njl., kunye nenani le-60-80%; i-alcohols ingaba yi-methanol, i-ethanol, njl., kunye nesixa se-20-40%. Yongeza kancinane i-EC kwisikhongozelo esine-solvent ephantsi kokuvuselela ide imanziswe ngokupheleleyo kwaye inyibilike.
Inombolo yeCAS: 9004-57-3
5. Isicelo
Ngenxa yokunganyibiliki kwayo emanzini,ethyl celluloseisetyenziswa ikakhulu njengesibophelelo sethebhulethi kunye nemathiriyeli yokugquma ifilimu, njl. njl., kwaye inokusetyenziswa njengebhloko yemathiriyeli ye-matrix ukulungiselela iintlobo ezahlukeneyo zeetafile ezikhutshwa ngokuzinzileyo zematrix;
Isetyenziswe njengezinto ezixubeneyo ukulungiselela amalungiselelo okukhutshwa okuzinzileyo kunye neepellets ezizinzileyo;
Isetyenziswe njengento encedisayo ye-encapsulation ukulungiselela i-microcapsules ekhutshwe ngokuqhubekayo, ukwenzela ukuba umphumo weziyobisi unokukhutshwa ngokuqhubekayo kwaye uthintele ezinye izidakamizwa ezinyibilikayo emanzini ukuba zisebenze ngaphambi kwexesha;
Inokusetyenziswa kwakhona njenge-dispersant, stabilizer, kunye ne-agent egcina amanzi kwiifom ezahlukeneyo ze-dosage yamayeza ukukhusela ukufuma kunye nokuwohloka kwamayeza kunye nokuphucula ukugcinwa okukhuselekileyo kwamacwecwe.
Ixesha lokuposa: Apr-28-2024