Polyethylene Glycol/PEG/CAS:25322-68-3
Whakaahuatanga Poto:
Ingoa Hua: Polyethylene Glycol
CAS:25322-68-2
MF:(C2H4O)nH2O
MW:0
HANGANGA:
Whakaahuatanga:
Ko ngā polyethylene glycol he whānau pūmua rārangi i hangaia e te tauhohenga whakapūpū i whakakorikoria e te turanga me ngā waeine ethylene oxide e tāpirihia ana ki te ethylene. Ko te tātai ngota ko (C2H4O)multH2O, ko te mult te tohu i te toharite o ngā rōpū oxyethylene. Ka taea e te taumaha ngota te awhe mai i te 200 ki te maha miriona e rite ana ki te maha o ngā rōpū oxyethylene. Ko ngā rauemi taumaha ngota teitei ake (100 000 ki te 5 000 000) e kiia ana ko ngā polyethylene oxides. Ko te taumaha ngota toharite o tētahi hua polyethylene glycol motuhake ka taka ki roto i ngā rohe tino whaiti (°5%). Ko te maha o ngā waeine ethylene oxide, ko tō rātou taumaha ngota tata rānei (hei tauira, PEG-4, PEG-200 rānei) e tohu ana i te ingoa o ngā polyethylene glycol motuhake. Ko ngā polyethylene glycol me te taumaha ngota iti iho i te 600 he wai, ko ngā mea he taumaha ngota 1000 neke atu rānei he totoka. Kāore ēnei rauemi e mimiti, e wairewa-wai, kāore he reka, kāore hoki he kakara. Ka taea te whakaranu ki te wai, ki ngā waipiro, ki ngā ester, ki ngā ketone, ki ngā whakarewa kakara, me ngā hauwaiwai konukōre, engari kāore e taea te whakaranu ki ngā ārani, ki ngā parafini, ki ngā ware pi, me ngā eter.
Whakatakotoranga
| Taonga | Whakatakotoranga |
| Te pūwāhi rewa | 64-66°C |
| Te pūwāhi koropupū | >250°C |
| Kiato | 1.27 g/mL i te 25 °C |
| Kīanga papatipu | 400-500kg/m3 |
| Te mātotoru o te kohu | >1 (vs hau) |
| Pēhanga kohu | <0.01 mm Hg (20°C) |
| Taupū whakaata | n20/R 1.469 |
| Te pāmahana rokiroki | 2-8°C |
Whakamahinga
Ko te Polyethylene Glycol he mea here, he mea pani, he mea whakamarara, he mea tāpiri kakara, he mea whakakirihou hoki. He wai mārama, kāore he tae, he wai matotoru, he wai hiroki e rite ana ki te paraffin (mā, he ware pi, he kirikiri rānei), me te pH o te 4.0–7.5 i te kukū 1:20. Ka wairewa ki te wai (mw 1,000) me te maha o ngā whakarewa waro.
Ko te polyethylene glycol (PEG) he mea here, he whakarewa, he mea whakakirihou, he mea whakangawari hoki e whakamahia whānuitia ana mō ngā turanga kirīmi whakapaipai me ngā hinu rongoā. He tino whakamakuku ngā titi tae atu ki te taumaha ngota o te 500. I tua atu i tēnei taumaha, ka heke te mimiti wai.
I whakamahia ngātahi me te pango waro hei hanga i tētahi hiato kawe hiko.1 I whakamahia ngā nanospheres polymer o te poly(ethylene glycol) mō te tuku rongoā.
Ngā ngota Poly(ethylene Glycol) o te tata ki te 2000 ngā monomer. E whakamahia ana te Poly(ethylene Glycol) i roto i ngā momo tono mai i te matū ahumahi ki te matū koiora. Kua whakaatuhia e ngā rangahau tata nei kei te mau tonu te kaha o te PEG ki te āwhina i te tukanga whakaora i te whara o te taurakira, me te āwhina i te tukanga kawe i ngā io i roto i ngā kararehe. I roto i ngā kiore, kua whakaatuhia he āwhina i te whakatika i ngā axon sciatic kua tapahia, me te āwhina i te whakaora i ngā kino o te io. Ka hangaia i roto i ngā ahumahi hei matū whakahinuhinu mō ngā mata rerekē hei whakaiti i te waku. Ka whakamahia hoki te PEG i roto i te whakarite i ngā pūnaha kawe vesicle me te tono ki ngā tikanga tātaritanga, ki ngā tikanga tuku rongoā rānei.
Te Tākai me te Tukunga
200KG/Pahu, kia rite rānei ki ngā whakaritenga a te kiritaki.
Nō ngā taonga noa, ā, ka taea te tuku mā te moana me te rangi
Te pupuri me te rokiroki
Te roa o te oranga: 24 marama mai i te rā i hangaia ai, i roto i te takai taketake kāore anō kia whakatuwheratia, rongoatia ki te wāhi matao, maroke, ā, kāore e taea te ārai i te rā tika, i te wai rānei.
Whare putunga hauhautanga, Whakamaroke pāmahana iti, Wehea mai i ngā waikura me ngā waikawa.
