Ethyl cellulose(Ethyl cellulose ether), nke a makwaara dị ka cellulose ether, nke a na-akpọ EC.
Nhazi nke molekul na usoro nhazi: [C6H7O2(OC2H5)3] n.
1. Iji
Ngwaahịa a nwere ọrụ nke njikọ, njupụta, imepụta ihe nkiri, wdg. A na-eji ya maka plastik sịntetik resin, mkpuchi, ihe nnọchi roba, ink, ihe mkpuchi, a na-ejikwa ya dị ka ihe nrapado, ihe ndị na-emecha ákwà, wdg., a pụkwara iji ya dị ka anụmanụ n'ọrụ ugbo na ịzụ anụmanụ. Ihe mgbakwunye nri, nke a na-eji dị ka ihe nrapado na ngwaahịa eletrọnịkị na ihe ndị agha na-akpali.
2. Ihe ndị dị mkpa maka teknụzụ
Dịka ojiji dị iche iche si dị, enwere ike kewaa EC nke a na-ere ahịa n'ụdị abụọ: ọkwa ụlọ ọrụ na ọkwa ọgwụ, a na-agbazekwa ya n'ime ihe mgbaze organic. Maka ọkwa ọgwụ EC, ọkọlọtọ ogo ya kwesịrị iru ọkọlọtọ nke mbipụta Chinese Pharmacopoeia 2000 (ma ọ bụ mbipụta USP XXIV/NF19 na ọkọlọtọ Japanese Pharmacopoeia JP).
3. Njirimara anụ ahụ na nke kemịkalụ
1. Ọdịdị: EC bụ ntụ ntụ mmiri ọcha ma ọ bụ ntụ ntụ ntụ ntụ, enweghị isi.
2. Àgwà: EC nke a na-ere ahịa anaghị agbaze na mmiri, mana ọ na-agbaze na ihe mgbaze dị iche iche sitere na organic. Ọ nwere ezigbo nkwụsi ike okpomọkụ, ọdịnaya ntụ dị ala mgbe a gbara ya ọkụ, ọ naghịkwa arapara ma ọ bụ na-eme ka ọ na-afụ ụfụ. Ọ nwere ike ịmepụta ihe siri ike. Ọ ka nwere ike ịnọgide na-enwe mgbanwe. Ngwaahịa a anaghị egbu egbu, nwere ihe mgbochi nje siri ike, ọ naghịkwa arụ ọrụ nke ọma na metabolic, mana ọ na-adịkarị mfe imebi oxidative n'okpuru ìhè anyanwụ ma ọ bụ ìhè ultraviolet. Maka ebumnuche pụrụ iche nke EC, enwerekwa ụdị ndị na-agbaze na lye na mmiri dị ọcha. Maka EC nke nwere ogo nnọchi karịa 1.5, ọ bụ thermoplastic, nwere ebe dị nro nke 135 ~ 155°C, ebe agbaze nke 165 ~ 185°C, ike ndọda pseudo nke 0.3 ~ 0.4 g/cm3, na njupụta dị n'etiti 1.07 ~ 1.18 g/cm3. Ogo nke etherification nke EC na-emetụta ike ịgbaze, nnabata mmiri, ihe onwunwe igwe na ihe onwunwe okpomọkụ. Ka ọkwa nke etherification na-abawanye, ike ịgbaze na lye na-ebelata, ebe ike ịgbaze na ihe mgbaze organic na-abawanye. A na-agbaze na ọtụtụ ihe mgbaze organic. Ihe mgbaze a na-ejikarị eme ihe bụ toluene/ethanol dị ka ihe mgbaze agwakọtara 4/1 (ibu). Ogo nke etherification na-abawanye, ebe ịdị nro na hygroscopicity na-ebelata, okpomọkụ ojiji bụ -60°C ~ 85°C. Ike nrụgide 13.7~54.9Mpa, ike iguzogide olu 10*e12~10*e14 ω.cm
Ethyl cellulose (DS: 2.3-2.6) bụ cellulose ether nke na-abụghị ionic nke anaghị agbaze na mmiri mana ọ na-agbaze na ihe mgbaze organic.
1.Ọ dịghị mfe ịgba ọkụ.
2. Ezigbo nkwụsi ike okpomọkụ na ezigbo thermos-plasticity.
3. Anaghị agbanwe agba ka ọ bụrụ ìhè anyanwụ.
4. Ezigbo mgbanwe.
5. Ezigbo ihe onwunwe dielectric.
6. O nwere ezigbo iguzogide alkali na iguzogide acid adịghị ike.
7.Ọrụ ọrụ dị mma megide ịka nká.
8. Ezigbo nguzogide nnu, nguzogide oyi na nguzogide mmiri.
9. Ọ na-adịgide adịgide na kemịkalụ, ọ gaghịkwa emebi ma ọ bụrụ na echekwara ya ogologo oge.
10. Ọ nwere ike dakọtara na ọtụtụ resins ma nwee ezigbo ndakọrịta na ihe ndị na-eme ka plastik dị iche iche.
11. Ọ dị mfe ịgbanwe agba n'okpuru gburugburu alkaline siri ike na okpomọkụ.
4. Usoro mgbaze
Ihe mgbaze agwakọtara nke a na-ejikarị eme ihe maka ethyl cellulose (DS: 2.3~2.6) bụ hydrocarbons na alcohols. A na-eji ihe na-esi ísì ụtọ eme ihe dịka benzene, toluene, ethylbenzene, xylene, wdg, nke nwere oke nke 60-80%; mmanya nwere ike ịbụ methanol, ethanol, wdg, nke nwere oke nke 20-40%. Jiri nwayọ tinye EC n'ime akpa ahụ nwere ihe mgbaze ahụ ka ọ na-agwakọta ruo mgbe mmiri mmiri zuru oke ma gbazee.
Nọmba CAS: 9004-57-3
5. Ngwa
N'ihi na mmiri anaghị agbaze,ethyl cellulosea na-ejikarị ya eme ihe dị ka ihe njikọta mbadamba na ihe mkpuchi ihe nkiri, wdg., a pụkwara iji ya dị ka ihe mgbochi ihe matrix iji kwadebe ụdị dị iche iche nke mbadamba matrix na-adịgide adịgide;
A na-eji ya dị ka ihe agwakọtara agwakọta iji kwadebe nkwadebe a kpụchara akpụcha na-adịgide adịgide na pellet ndị na-adịgide adịgide;
A na-eji ya dị ka ihe enyemaka maka ihe e ji ekpuchi ihe iji kwadebe obere kapsụl ndị na-adịgide adịgide, ka mmetụta ọgwụ ahụ wee nwee ike ịpụta mgbe niile ma gbochie ụfọdụ ọgwụ ndị na-agbaze mmiri ịmalite ịrụ ọrụ tupu oge eruo;
A pụkwara iji ya dị ka ihe na-ekesa ihe, ihe na-eme ka ọ kwụsie ike, na ihe na-ejide mmiri n'ụdị ọgwụ dị iche iche iji gbochie mmiri mmiri na mmebi nke ọgwụ ma melite nchekwa nke mbadamba.
Oge ozi: Eprel-28-2024