Ethyl cellulose(Ethyl cellulose ether), e mōhiotia ana ko te cellulose ether, e kiia nei ko EC.
Te hanganga ngota me te tātai hanganga: [C6H7O2(OC2H5)3] n.
1. Te Whakamahi
He mahi ā tēnei hua hei here, hei whakakī, hei hanga kiriata, me ētahi atu. E whakamahia ana mō ngā kirihou kapia hangai, ngā paninga, ngā whakakapi rapa, ngā waituhi, ngā rauemi whakamahana, ā, e whakamahia ana hoki hei piripiri, hei whakaoti kakahu, me ētahi atu, ā, ka taea te whakamahi hei kararehe i roto i te ahuwhenua me te mahi kararehe. Tāpiringa kai, hei piripiri i roto i ngā hua hiko me ngā pūwero hōia.
2. Ngā whakaritenga hangarau
E ai ki ngā whakamahinga rerekē, ka taea te wehewehe i te EC hokohoko kia rua ngā wāhanga: te kounga ahumahi me te kounga rongoā, ā, ka wairewahia i roto i ngā whakarewa rauropi. Mō te EC kounga rongoā, me tutuki tōna paerewa kounga ki ngā paerewa o te putanga Chinese Pharmacopoeia 2000 (te putanga USP XXIV/NF19 me te paerewa Japanese Pharmacopoeia JP rānei).
3. Ngā āhuatanga ā-tinana me ngā āhuatanga matū
1. Āhua: He ma, he hina mārama rānei te paura wai EC, kāore he kakara.
2. Ngā Āhuatanga: Ko te EC hokohoko he mea kore e wairewa i roto i te wai, engari ka wairewa i roto i ngā whakarewa rauropi rerekē. He pai te pumau o te wera, he iti rawa te pungarehu ina tahuna, ā, he onge te piri, te ahua rānei he kawa. Ka taea e ia te hanga i tētahi kiriata pakari. Ka taea tonu te pupuri i te ngāwari. Kāore tēnei hua i te paitini, he kaha ngā āhuatanga ārai-koiora, ā, he kore e mahi i te pākia o te tinana, engari he ngāwari ki te pirau waikura i raro i te rā, i te hihi ultraviolet rānei. Mō te EC motuhake, kei reira anō ngā momo ka wairewa i roto i te rai me te wai parakore. Mō te EC me te nekehanga whakakapinga neke atu i te 1.5, he kirihou wera, me te pūwāhi whakangawari o te 135~155°C, te pūwāhi rewa o te 165~185°C, te taumaha motuhake rūpahu o te 0.3~0.4 g/cm3, me te kiato whanaunga o te 1.07~1.18 g/cm3. Ko te nekehanga o te etherification o te EC ka pā ki te wairewa, te mimiti wai, ngā āhuatanga miihini me ngā āhuatanga wera. I te pikinga ake o te taumata o te etherification, ka heke te wairewatanga i roto i te lye, engari ka piki ake te wairewatanga i roto i ngā whakarewa waro. Ka wairewa i roto i te maha o ngā whakarewa waro. Ko te whakarewa e whakamahia whānuitia ana ko te toluene/ethanol hei 4/1 (taumaha) whakarewa whakauru. Ka piki ake te taumata o te etherification, ka heke te pūwāhi whakangawari me te hygroscopicity, ā, ko te pāmahana whakamahinga he -60°C~85°C. Ko te kaha kume 13.7~54.9Mpa, ko te ātete rōrahi 10*e12~10*e14 ω.cm
Ko te etila heroira (DS: 2.3-2.6) he etera heroira kore-ionic e kore e wairewa i roto i te wai engari ka wairewa i roto i ngā whakarewa waro.
1. Kāore i te ngāwari ki te tahu.
2. He pai te pumau o te wera me te tino pai o te kirihou-whakarewa.
3. Kāore e rerekē te tae ki te hihi o te rā.
4. He ngāwari pai.
5. Ngā āhuatanga hiko-kore pai.
6. He tino pai te ātete ki te kawakore, ā, he ngoikore te ātete ki te waikawa.
7. He pai te mahi ārai-pakeke.
8. He ātete pai ki te tote, ki te makariri me te mimiti makuku.
9. He pumau ki ngā matū, ā, e kore e pirau ina rongoatia mō te wā roa.
10. Ka taea te hototahi ki te maha o ngā kapia, ā, he pai te hototahi ki ngā mea hanga kirihou katoa.
11. He ngāwari te huri tae i raro i te taiao kawakore kaha me te wera.
4. Tikanga whakarewa
Ko ngā whakarewa whakaranu e whakamahia whānuitia ana mō te ethyl cellulose (DS: 2.3~2.6) ko ngā hauwaiwaro kakara me ngā waipiro. Ko ngā mea kakara ko te benzene, te toluene, te ethylbenzene, te xylene, me ētahi atu, me te nui o te 60-80%; ko ngā waipiro ko te methanol, te ethanol, me ētahi atu, me te nui o te 20-40%. Tāpirihia mārire te EC ki te ipu kei roto te whakarewa i raro i te whakaoho kia tino mākū, kia rewa rawa.
Nama CAS: 9004-57-3
5. Tono
Nā te mea kāore e wairewa i roto i te wai,te etiloselulosae whakamahia ana hei here papa me te rauemi paninga kiriata, me ētahi atu, ā, ka taea hoki te whakamahi hei aukati rauemi matihiko hei whakarite i ngā momo papa tuku-roa matihiko;
Whakamahia hei rauemi whakaranu hei whakarite i ngā whakaritenga tuku-tonu kua pania me ngā pire tuku-tonu;
Ka whakamahia hei rauemi āwhina whakakī hei whakarite i ngā kāpūru iti tuku-roa, kia taea ai te tuku tonu i te pānga o te rongoā, kia kore ai e tere te pānga o ētahi rongoā wairewa-wai;
Ka taea hoki te whakamahi hei whakamarara, hei whakaū, hei pupuri wai hoki i roto i ngā momo horopeta rongoā hei ārai i te makuku me te pirau o ngā rongoā, hei whakapai ake hoki i te rokiroki haumaru o ngā papa.
Wā tuku: 28 Paenga-whāwhā 2024