He aha nā waiwai a me ka hoʻohana ʻana o ka ethyl cellulose?

Ethyl cellulose (Ethyl cellulose ether), i kapa ʻia ʻo cellulose ether, i kapa ʻia ʻo EC.
ʻO ka hoʻohui molekala a me ke ʻano hana: [C6H7O2(OC2H5)3] n.
1.Hoʻohana
ʻO kēia huahana nā hana o ka hoʻopaʻa ʻana, ka hoʻopiha ʻana, ka hana kiʻiʻoniʻoni, a me nā mea ʻē aʻe. e like me ka holoholona i loko o ka mahiʻai a me ka holoholona hānai mea hoʻohui meaʻai, hoʻohana 'ia e like me adhesive i ka uila huahana a me ka pūʻali propellants.
2. Nā koi ʻenehana
E like me nā hoʻohana like ʻole, hiki ke hoʻokaʻawale ʻia ka EC kūʻai aku i ʻelua mau ʻāpana: ʻoihana ʻenehana a me ka lāʻau lapaʻau, a hiki ke hoʻoheheʻe ʻia i nā solvents organik.No ka papa pharmaceutical grade EC, pono kona kūlana maikaʻi e kūpono i nā kūlana o ka paʻi Chinese Pharmacopoeia 2000 (a i ʻole USP XXIV/NF19 edition a me Japanese Pharmacopoeia JP standard).
3. Ka waiwai kino a me ke kemika
1. Nānā: EC he keʻokeʻo a ʻeleʻele paha ka pauka wai, ʻaʻohe ʻala.
2. Nā waiwai: ʻAʻole hiki ke hoʻoheheʻe ʻia ʻo EC i ka wai, akā hiki ke hoʻoheheʻe ʻia i nā mea hoʻoheheʻe ʻokoʻa.Loaʻa iā ia ke kūpaʻa wela maikaʻi, haʻahaʻa haʻahaʻa ka lehu i ka wā i puhi ʻia ai, a ʻaʻole i paʻa a paʻa paha.Hiki iā ia ke hana i kahi kiʻiʻoniʻoni paʻakikī.Hiki ke mālama i ka maʻalahi.ʻAʻohe mea ʻawaʻawa kēia huahana, he mau waiwai anti-biological ikaika, a he metabolically inert, akā hiki ke hoʻohaʻahaʻa i ka oxidative degradation ma lalo o ka lā a i ʻole ke kukui ultraviolet.No ka EC kumu kūikawā, aia kekahi mau ʻano e hoʻoheheʻe ʻia i ka lye a me ka wai maʻemaʻe.No ka EC me kahi degere o ka hoʻololi ʻana ma luna o 1.5, he thermoplastic, me kahi palupalu o 135 ~ 155 ° C, kahi heheʻe o 165 ~ 185 ° C, kahi umekaumaha pseudo o 0.3 ~ 0.4 g / cm3, a me kahi pili. mānoanoa o 1.07~1.18 g/cm3.ʻO ke kiʻekiʻe o ka etherification o EC pili i ka solubility, absorption wai, nā waiwai mechanical a me nā waiwai wela.Ke piʻi aʻe ka degere o ka etherification, e emi ana ka solubility i ka lye, ʻoiai ke piʻi nei ka solubility i nā solvents organik.Hiki ke hoʻoheheʻe ʻia i loko o nā mea hoʻoheheʻe organik.ʻO ka mea hoʻoheheʻe maʻamau i hoʻohana ʻia ʻo toluene/ethanol ma ke ʻano he 4/1 (kaumaha) i hui pū ʻia.Hoʻonui ka pae o ka etherification, hoʻemi ka wahi palupalu a me ka hygroscopicity, a ʻo ka mahana hoʻohana -60 ° C ~ 85 ° C.ʻO ka ikaika tensile 13.7~54.9Mpa, ka nui resistivity 10*e12~10*e14 ω.cm
ʻO ka Ethyl cellulose (DS: 2.3-2.6) he ether cellulose non-ionic i hiki ʻole ke hoʻoheheʻe ʻia i ka wai akā hiki ke hoʻoheheʻe ʻia i nā mea hoʻoheheʻe organik.
1.ʻAʻole maʻalahi e puhi.
2.Good thermal paʻa a me ka maikaʻi thermos-plasticity.
3.ʻAʻole hoʻololi i ke kala i ka lā.
4.Maikaʻi kūpono.
5.Good dielectric waiwai.
6. He kūpaʻa alkali maikaʻi loa ia a me ke kūpaʻa ʻakika nāwaliwali.
7.Good anti-kahiko hana.
8.Good paʻakai kū'ē, anu kū'ē a me ka makū absorption kū'ē.
9. He kūpaʻa ia i nā kemika a ʻaʻole e hōʻino i ka mālama lōʻihi.
10. Hiki ke kūpono me nā resins he nui a loaʻa ka pilina maikaʻi me nā plasticizer āpau.
11. He maʻalahi ke hoʻololi i ke kala ma lalo o ke kaiapuni alkaline ikaika a me ka wela.
4. Keʻano hoʻopau
ʻO nā mea hoʻoheheʻe hui ʻia i hoʻohana pinepine ʻia no ka ethyl cellulose (DS: 2.3~2.6) he hydrocarbons aromatic a me nā waiʻona.Hiki i nā Aromatics ke benzene, toluene, ethylbenzene, xylene, etc., me ka nui o 60-80%;hiki i nā waiʻona ke methanol, ethanol, etc., me ka nui o 20-40%.Hoʻohui mālie i ka EC i loko o ka ipu i loaʻa ka mea hoʻoheheʻe ma lalo o ka hoʻoulu ʻana a hiki i ka pulu ʻana a hoʻoheheʻe ʻia.
Ka helu CAS: 9004-57-3
5. Noi
Ma muli o kona hiki ʻole i ka wai, hoʻohana nui ʻia ka ethyl cellulose e like me ka mea hoʻopaʻa papa a me nā mea hoʻonaninani kiʻiʻoniʻoni, a me nā mea ʻē aʻe, a hiki ke hoʻohana ʻia ma ke ʻano he matrix material blocker e hoʻomākaukau ai i nā ʻano papa matrix sustained-release;
Hoʻohana ʻia ma ke ʻano he mea hui e hoʻomākaukau ai i nā mea hoʻomākaukau hoʻokuʻu hoʻokuʻu ʻia a me nā pellets hoʻokuʻu paʻa;
Hoʻohana ʻia ia ma ke ʻano he mea kōkua encapsulation no ka hoʻomākaukau ʻana i nā microcapsules hoʻokuʻu mau ʻia, i hiki ke hoʻokuʻu mau ʻia ka hopena o ka lāʻau a pale aku i kekahi mau lāʻau hoʻoheheʻe wai mai ka hana mua ʻana;
Hiki ke hoʻohana ʻia ma ke ʻano he dispersant, stabilizer, a me ka mea mālama wai i nā ʻano lāʻau lapaʻau like ʻole e pale ai i ka makū a me ka hōʻino ʻana o nā lāʻau a hoʻomaikaʻi i ka mālama palekana o nā papa.