Ethyl cellulose(Ethyl cellulose ether), inozivikanwawo se cellulose ether, inonzi EC.
Kuumbwa kwemamorekuru uye fomura yemaumbirwo: [C6H7O2(OC2H5)3] n.
1. Kushandisa
Chigadzirwa ichi chine mabasa ekubatanidza, kuzadza, kugadzira firimu, nezvimwewo. Chinoshandiswa pakugadzira mapurasitiki ekugadzira resin, machira, zvinotsiva rabha, inki, zvinhu zvinodzivirira kupisa, uye chinoshandiswawo sezvinamathero, machira ekupedzisa, nezvimwewo, uye chinogona kushandiswa semhuka mukurima nekuchengeta mhuka. Chinowedzera chikafu, chinoshandiswa sechinamathero muzvigadzirwa zvemagetsi uye zvinofambisa zvemauto.
2. Zvinodiwa zvehunyanzvi
Zvichienderana nemashandisirwo akasiyana, EC inotengeswa inogona kukamurwa kuita mapoka maviri: giredhi reindasitiri negiredhi remishonga, uye inowanzo nyungudika muzvinonyungudutsa zve organic. Kune giredhi remishonga EC, mwero wayo wemhando yepamusoro unofanirwa kusangana nezvinodiwa zveChinese Pharmacopoeia 2000 edition (kana USP XXIV/NF19 edition uye Japanese Pharmacopoeia JP standard).
3. Hunhu hwemuviri nemakemikari
1. Chitarisiko: EC ipfu yemvura chena kana grey yakapfava, haina hwema.
2. Hunhu: EC inotengeswa kazhinji hainyungudike mumvura, asi inonyungudika muzvinhu zvakasiyana-siyana zvinonyungudika. Ine kugadzikana kwakanaka kwekupisa, ine dota shoma kwazvo kana yapiswa, uye haiwanzobati kana kunzwa seyakakombama. Inogona kugadzira firimu rakaoma. Inogona kuramba ichichinjika. Chigadzirwa ichi hachina chepfu, chine hunhu hwakasimba hwekudzivirira zvipenyu, uye hachina simba rekugadzirisa metabolic, asi chinowanzo kanganiswa ne oxidative pasi pezuva kana ultraviolet light. Kune EC inoshanda zvakanyanya, kunewo mhando dzinonyungudika mu lye nemvura yakachena. Kune EC ine dhigirii rekuchinja pamusoro pe 1.5, i thermoplastic, ine poindi yekunyorovesa ye 135 ~ 155 °C, poindi yekunyungudika ye 165 ~ 185 °C, poindi chaiyo ye 0.3 ~ 0.4 g/cm3, uye density ye 1.07 ~ 1.18 g/cm3. Dhigirii re EC etherification rinokanganisa kunyungudika, kunyungudika kwemvura, hunhu hwemakanika uye hunhu hwekupisa. Sezvo mwero we etherification uchiwedzera, kunyungudika mu lye kunoderera, ukuwo kunyungudika mu organic solvents kuchiwedzera. Inonyungudika mu organic solvents dzakawanda. Solvent inowanzoshandiswa i toluene/ethanol se 4/1 (huremu) mixed solvent. Mwero we etherification unowedzera, softening point uye hygroscopicity inoderera, uye tembiricha yekushandisa i -60°C~85°C. Simba re tensile 13.7~54.9Mpa, volume resistivity 10*e12~10*e14 ω.cm
Ethyl cellulose (DS: 2.3-2.6) i non-ionic cellulose ether isinganyungudike mumvura asi inonyungudika mu organic solvents.
1.Hazvisi nyore kupisa.
2.Kugadzikana kwakanaka kwekupisa uye thermos-plasticity yakanaka kwazvo.
3.Hachichinje ruvara kuita chiedza chezuva.
4.Kugona kuchinjika zvakanaka.
5. Hunhu hwakanaka hwe dielectric.
6.Ine simba guru rekudzivirira alkali uye simba rekudzivirira acid.
7.Kushanda zvakanaka kwekudzivirira kukwegura.
8. Kudzivirira munyu zvakanaka, kudzivirira kutonhora uye kudzivirira kunyungudika kwemvura.
9.Inogona kugadzikana nemakemikari uye haizoora kana ikachengetwa kwenguva refu.
10. Inogona kuenderana nemaresini akawanda uye inoenderana zvakanaka nemapurasitiki ese.
11. Zviri nyore kuchinja ruvara kana paine zvakatipoteredza zvine alkaline yakawanda uye kupisa kwakasimba.
4. Nzira yekunyungudutsa
Zvinonyungudutsa zvinoshandiswa zvakanyanya pa ethyl cellulose (DS: 2.3 ~ 2.6) i aromatic hydrocarbons uye alcohols. Zvinonhuwirira zvinogona kuva benzene, toluene, ethylbenzene, xylene, nezvimwewo, nehuwandu hwe60-80%; alcohols dzinogona kuva methanol, ethanol, nezvimwewo, nehuwandu hwe20-40%. Wedzera EC zvishoma nezvishoma mumudziyo une solvent uchikurunga kusvika yanyorova uye yanyungudika zvachose.
Nhamba yeCAS: 9004-57-3
5. Kushandiswa
Nekuda kwekusanyungudika kwemvura,ethyl celluloseinonyanya kushandiswa sechinobatanidza mapiritsi uye chinobatanidza firimu, nezvimwewo, uye inogona kushandiswawo sechinodzivirira matrix midziyo kugadzira mhando dzakasiyana dzemapiritsi anoburitswa kwenguva refu e matrix;
Inoshandiswa semusanganiswa wekugadzira mishonga inoputirwa inoburitswa kwenguva refu uye mishonga inoburitswa kwenguva refu;
Inoshandiswa sechinhu chinobatsira chekuvhara ma microcapsules kugadzira microcapsules dzinoburitswa kwenguva refu, kuitira kuti mushonga ugone kuburitswa nguva dzose uye kudzivirira mimwe mishonga inonyungudika mumvura kuti isashande nguva isati yakwana;
Inogona zvakare kushandiswa semushonga unobvisa mvura mumuviri, unochengetedza mvura, uye unochengetedza mvura mumhando dzakasiyana dzemishonga kudzivirira hunyoro nekuora kwemishonga uye kuvandudza kuchengetwa kwakachengeteka kwemapiritsi.
Nguva yekutumira: Kubvumbi-28-2024