Pehea ka hana o ka aila demulsifier?

ʻO ke ʻano o ka palaʻaila demulsifiersua hoʻokumu ʻia ma ke kumumanaʻo hoʻololi hoʻololi-hoʻihoʻi. Ma hope o ka hoʻohui ʻana i ka demulsifier, hiki ke hoʻololi i ka pae, e hana ana i nā surfactants e hana i ke ʻano emulsion kūʻē i ka mea i hana ʻia e ka emulsifier (reverse demulsifier). Hoʻopili kēia mau demulsifiers me nā emulsifiers hydrophobic e hana i nā paʻakikī, a laila e hoʻokaʻawale i nā waiwai emulsifying. ʻO kekahi ʻano hana ʻo ia ka haki ʻana o ke kiʻiʻoniʻoni interfacial ma o ka hui ʻana. Ma lalo o ka hoʻomehana a hoʻouluulu paha, hui pinepine nā demulsifiers me ke kiʻiʻoniʻoni interfacial o ka emulsion-a i ʻole adsorbing ma luna a i ʻole ka hoʻoneʻe ʻana i kekahi mau molekole surfactant-e hoʻopau i ke kiʻiʻoniʻoni, e alakaʻi ana i ka flocculation, coalescence, a me ka demulsification hope.

 

Hoʻokomo pinepine ʻia nā emulsion ʻaila maʻamau i ka wā e hana ai a hoʻomaʻemaʻe. Hana ʻia ka hapa nui o ka ʻaila ʻaila ma ke ʻano emulsified. Aia ka emulsion i ʻelua mau wai hiki ʻole ke hoʻoheheʻe ʻia, kahi e hoʻopuehu ʻia ai kekahi e like me nā kulu maikaʻi loa (ma kahi o 1 mm ke anawaena) i hoʻokuʻu ʻia i kekahi.

 

ʻO ka mea maʻamau, ʻo kekahi o kēia mau wai he wai, a ʻo kekahi he ʻaila. Hiki ke hoʻopuehu maikaʻi ʻia ka ʻaila i loko o ka wai, e hana ana i kahi emulsion aila-i-wai (O / W), kahi o ka wai ka manawa mau a ʻo ka ʻaila ka manawa hoʻopuehu. ʻO ka mea ʻē aʻe, inā ʻo ka ʻaila ka manawa mau a hoʻopuehu ʻia ka wai, hana ia i ka wai-i-ʻaila (W/O) emulsion. ʻO ka hapa nui o nā emulsion aila ʻaila no ke ʻano hope.

 

I kēia mau makahiki i hala iho nei, ua kālele ka noiʻi ʻana i nā mīkini ʻaila demulsification i nā ʻike kikoʻī o ka droplet coalescence a me ka hopena o nā demulsifiers ma ka rheology interfacial. Eia nō naʻe, ma muli o ka paʻakikī o nā pilina demulsifier-emulsion, ʻoiai ka noiʻi nui ʻana, ʻaʻohe manaʻo i hui pū ʻia ma ka mīkini demulsification.

 

ʻO kekahi mau mīkini i ʻae ʻia e like me:

1. Molecule displacement: Hoʻololi nā molekala demulsifier i nā emulsifiers ma ke kikowaena, e hoʻopau i ka emulsion.

2.Wrinkle deformation: Hōʻike nā haʻawina Microscopic i nā emulsions W / O i pālua a i ʻole nā ​​papa wai i hoʻokaʻawale ʻia e nā apo ʻaila. Ma lalo o ka hoʻomehana ʻana, ka hoʻoulu ʻana, a me ka hana demulsifier, pili kēia mau papa, e hoʻoulu ai i ka coalescence droplet.

Eia kekahi, ʻo ka noiʻi kūloko ma nā ʻōnaehana emulsion O/W e hōʻike ana e pono i kahi demulsifier kūpono ke hoʻokō i nā pae hoʻohālikelike: ʻoihana ikaika o ka ʻili, ka pulu maikaʻi, lawa ka hiki i ka flocculation, a me ka hana coalescence maikaʻi.

 

Hiki ke hoʻokaʻawale ʻia nā demulsifier ma muli o nā ʻano surfactant:

•​Anionic demulsifiers: E hoʻokomo i nā carboxylates, sulfonates, a me polyoxyethylene fatty sulfates. ʻAʻole maikaʻi lākou, koi i nā dosages nui, a pili i nā electrolytes.

•​Cationic demulsifiers: ʻO nā paʻakai ammonium quaternary nui, kūpono no ka ʻaila māmā akā ʻaʻole kūpono no ka aila kaumaha a ʻelemakule paha.

•Nonionic demulsifiers: E hoʻokomo i nā polyether poloka i hoʻomaka ʻia e nā amine a i ʻole nā ​​mea ʻawaʻawa, nā polyeter block alkylphenol resin, polyethers block phenol-amine resin, nā demulsifiers-based silicone, ultra-high molecular weight demulsifiers, polyphosphates, modified block polyethers, a me zwitterionic demulsifiers based (line-demulsifiers, imidazoa hinu).