I-ethyl cellulose(I-ethyl cellulose ether), ekwaziwa ngokuba yi-cellulose ether, ekwaziwa ngokuba yi-EC.
Ukwakheka kweemolekyuli kunye nefomula yolwakhiwo: [C6H7O2(OC2H5)3] n.
1.Ukusebenzisa
Le mveliso inemisebenzi yokubopha, ukuzalisa, ukwenza ifilimu, njl. Isetyenziselwa iiplastiki zokwenziwa ze-resin, izinto zokugquma, izinto zokutshintsha zerabha, ii-inki, izinto zokukhusela, kwaye ikwasetyenziswa njengezinto zokuncamathelisa, izinto zokugqiba amalaphu, njl.njl., kwaye ingasetyenziswa njengezilwanyana kwezolimo nasekufuyeni izilwanyana. Isongezelelo sokutya, isetyenziswa njenge-adhesive kwiimveliso ze-elektroniki kunye nee-propellants zomkhosi.
2. Iimfuno zobugcisa
Ngokweendlela ezahlukeneyo zokusetyenziswa, i-EC ethengiswayo inokwahlulwahlulwa ibe ziindidi ezimbini: inqanaba lemizi-mveliso kunye nenqanaba leyeza, kwaye ngokubanzi iyanyibilika kwizinyibilikisi zendalo. Kwi-EC yenqanaba leyeza, umgangatho wayo womgangatho kufuneka uhlangabezane nemigangatho yohlelo lweChinese Pharmacopoeia 2000 (okanye uhlelo lwe-USP XXIV/NF19 kunye nomgangatho weJapan Pharmacopoeia JP).
3. Iimpawu zomzimba nezekhemikhali
1. Inkangeleko: I-EC yimpuphu yolwelo olumhlophe okanye olungwevu olukhanyayo, ayinavumba.
2. Iipropati: I-EC ethengiswayo ngokubanzi ayinyibiliki emanzini, kodwa iyanyibilika kwiinyibilikisi ezahlukeneyo zezinto eziphilayo. Izinzile kakuhle kubushushu, inomxholo ophantsi kakhulu womlotha xa itshisiwe, kwaye ayinamathelani kakhulu okanye ivakala ngathi iyatshisa. Ingenza ifilimu eqinileyo. Isenokugcina ukuguquguquka. Le mveliso ayinabungozi, ineempawu ezinamandla zokulwa nebhayoloji, kwaye ayinayo i-metabolism, kodwa isengozini yokubola kwe-oxidative phantsi kwelanga okanye ukukhanya kwe-ultraviolet. Kwi-EC ekhethekileyo, kukwakho neentlobo ezinyibilika kwi-lye nakumanzi acocekileyo. Kwi-EC eneqondo lokutshintshwa elingaphezulu kwe-1.5, yi-thermoplastic, ineqondo lokuthambisa eliyi-135 ~ 155 °C, iqondo lokunyibilika eliyi-165 ~ 185 °C, ubunzima obuthile obuyi-0.3 ~ 0.4 g/cm3, kunye noxinano oluhambelanayo oluyi-1.07 ~ 1.18 g/cm3. Iqondo lokuguquguquka kwe-EC lichaphazela ukunyibilika, ukufunxwa kwamanzi, iimpawu zoomatshini kunye neempawu zobushushu. Njengoko inqanaba le-etherification lisanda, ukunyibilika kwi-lye kuyancipha, ngelixa ukunyibilika kwi-organic solvents kuyanda. Ukunyibilika kwi-organic solvents ezininzi. I-solvent esetyenziswa rhoqo yi-toluene/ethanol njenge-4/1 (ubunzima) ye-solvent exutyiweyo. Inqanaba le-etherification liyanda, indawo yokuthambisa kunye ne-hygroscopicity iyancipha, kwaye ubushushu bokusetyenziswa buyi--60°C~85°C. Amandla okuxinana yi-13.7~54.9Mpa, ukumelana nomthamo yi-10*e12~10*e14 ω.cm
I-ethyl cellulose (DS: 2.3-2.6) yi-non-ionic cellulose ether enganyibilikiyo emanzini kodwa enyibilikayo kwi-organic solvents.
1.Akulula ukuyitshisa.
2. Uzinzo oluhle lobushushu kunye ne-thermos-plasticity egqwesileyo.
3. Ayitshintshi umbala ube lilanga.
4. Ukuguquguquka okuhle.
5.Iipropati ezilungileyo ze-dielectric.
6.Inokumelana okuhle kakhulu ne-alkali kunye nokumelana ne-asidi ebuthathaka.
7. Ukusebenza kakuhle kokulwa nokwaluphala.
8. Ukumelana netyuwa okuhle, ukumelana nokubanda kunye nokumelana nokufunxwa komswakama.
9. Ihlala izinzile kwiikhemikhali kwaye ayizukubola xa igcinwa ixesha elide.
10.Ingahambelana neeresini ezininzi kwaye ihambelana kakuhle nazo zonke iiplastiki.
11. Kulula ukutshintsha umbala phantsi kobushushu obunamandla kunye ne-alkaline.
4. Indlela yokunyibilikisa
Iisombululi ezixutyiweyo ezisetyenziswa kakhulu kwi-ethyl cellulose (DS: 2.3 ~ 2.6) zii-aromatic hydrocarbons kunye nee-alcohols. Ii-aromatics zinokuba yi-benzene, i-toluene, i-ethylbenzene, i-xylene, njl., kunye nomlinganiselo we-60-80%; ii-alcohols zinokuba yi-methanol, i-ethanol, njl., kunye nomlinganiselo we-20-40%. Yongeza kancinci i-EC kwisikhongozeli esine-solvent phantsi kokuxubha ide imanziswe ngokupheleleyo kwaye ichitheke.
Inombolo ye-CAS: 9004-57-3
5. Isicelo
Ngenxa yokunganyibiliki kwamanzi,i-ethyl celluloseisetyenziswa kakhulu njengesixhobo sokubopha iithebhulethi kunye nezinto zokugquma ifilimu, njl.njl., kwaye ingasetyenziswa njengesithinteli sezinto zematrix ukulungiselela iintlobo ezahlukeneyo zeethebhulethi ezikhutshwayo ezihlala ixesha elide kwimatrix;
Isetyenziswa njengezinto ezixutyiweyo ukulungiselela amalungiselelo okukhululwa okuqhubekayo kunye neepellets ezikhutshwa rhoqo;
Isetyenziswa njengesixhobo sokuncedisa ekufakweni kwe-encapsulation ukulungiselela ii-microcapsules ezikhutshwa rhoqo, ukuze isiphumo sesiyobisi sikhutshwe rhoqo kwaye kuthintelwe ukuba amanye amayeza anyibilikayo emanzini asebenze ngaphambi kwexesha;
Ingasetyenziswa njenge-dispersant, i-stabilizer, kunye ne-arhente yokugcina amanzi kwiindlela ezahlukeneyo zokuthatha amayeza ukuthintela ukufuma kunye nokonakala kwamayeza kunye nokuphucula ukugcinwa okukhuselekileyo kweepilisi.
Ixesha leposi: Epreli-28-2024