Hydroxyethyl Cellulose (HEC)he wai-soluble nonionic cellulose ether, i hoʻohana nui ʻia i nā uhi, nā mea kūkulu hale, nā lāʻau lapaʻau, nā kemika o kēlā me kēia lā a me nā māla ʻē aʻe. Eia nō naʻe, he kiʻekiʻe ka wai o ka HEC a me ka hydrophobicity nāwaliwali, hiki ke alakaʻi i nā palena hana i kekahi mau hiʻohiʻona noi. No laila, hydrophobically hoʻololi ʻia ka hydroxyethyl cellulose (HMHEC) i mea e hoʻomaikaʻi ai i kāna mau waiwai rheological, hiki ke mānoanoa, kūpaʻa emulsification a me ka pale wai.
1. ʻO ke koʻikoʻi o ka hoʻololi hydrophobic o hydroxyethyl cellulose
Hoʻomaikaʻi i nā waiwai mānoanoa a me nā waiwai rheological
Hiki i ka hoʻololi hydrophobic ke hoʻomaikaʻi maikaʻi i ka hiki ke mānoanoa o HEC, ʻoi aku hoʻi ma nā kumukūʻai haʻahaʻa haʻahaʻa. Hōʻike ia i kahi viscosity kiʻekiʻe, e kōkua ana i ka hoʻomaikaʻi ʻana i ka thixotropy a me ka pseudoplasticity o ka ʻōnaehana. He mea koʻikoʻi kēia waiwai i nā ʻāpana o ka uhi, nā wai hoʻoheheʻe ʻaila, nā huahana mālama pilikino, a me nā mea ʻē aʻe, a hiki ke hoʻonui i ka paʻa a me ka hoʻohana ʻana i ka hopena o ka huahana.
Hoʻonui i ka paʻa emulsion
No ka mea hiki i ka HEC i hoʻololi ʻia ke hana i kahi hui hui i loko o ka wai wai, hoʻomaikaʻi nui ia i ka paʻa o ka emulsion, hiki ke hōʻemi i ka hoʻokaʻawale ʻana i ka ʻaila-wai, a hoʻomaikaʻi i ka hopena emulsification. No laila, loaʻa iā ia ka waiwai noi nui ma nā kula o ka emulsion coatings, nā huahana mālama ʻili a me nā emulsifiers meaʻai.
E hoʻonui i ka pale wai a me nā waiwai hana kiʻiʻoniʻoni
He hydrophilic loa ka HEC kuʻuna a hiki ke hoʻoheheʻe ʻia i nā wahi haʻahaʻa kiʻekiʻe a i ʻole ka wai, e pili ana i ka pale wai o ka mea. Ma o ka hoʻololi ʻana i ka hydrophobic, hiki ke hoʻonui ʻia kāna noi ʻana i nā uhi, nā adhesives, ka hana pepa a me nā māla ʻē aʻe, a hiki ke hoʻomaikaʻi ʻia kona kūpaʻa wai a me nā mea hana kiʻiʻoniʻoni.
E hoʻomaikaʻi i nā waiwai shear thinning
Hiki i ka Hydrophobic-modified HEC ke hoʻemi i ka viscosity ma lalo o nā kūlana shear kiʻekiʻe, ʻoiai e mālama ana i kahi kūlike kiʻekiʻe ma nā haʻahaʻa haʻahaʻa haʻahaʻa, ma laila e hoʻomaikaʻi ai i ka hana kūkulu ʻana a me ka hoʻemi ʻana i ka ikehu. He waiwai koʻikoʻi ia i nā ʻoihana e like me ka mining oilfield a me nā uhi hale.
2. Hoʻololi Hydrophobic o hydroxyethyl cellulose
Loaʻa ka hoʻololi hydrophobic HEC ma ka hoʻokomo ʻana i nā pūʻulu hydrophobic e hoʻoponopono i kona solubility a me nā waiwai mānoanoa ma o ka grafting kemika a i ʻole ka hoʻololi kino. ʻO nā ʻano hana hoʻololi hydrophobic maʻamau penei:
Hoʻopili pūʻulu hydrophobic
Hoʻokomo i ka alkyl (e like me hexadecyl), aryl (e like me phenyl), siloxane a i ʻole nā hui fluorinated ma ka mole HEC ma o ka hopena kemika e hoʻomaikaʻi i kona hydrophobicity. ʻo kahi laʻana:
Ke hoʻohana nei i ka esterification a i ʻole etherification reaction no ke kālai ʻana i ka alkyl kaulahao lōʻihi, e like me ka hexadecyl a i ʻole octyl, e hana i kahi ʻano hoʻohui hydrophobic.
Hoʻokomo i nā hui silicone ma o ka hoʻololi siloxane e hoʻomaikaʻi i kona kūpaʻa wai a me ka lubricity.
Ke hoʻohana nei i ka hoʻololi fluorination e hoʻomaikaʻi i ke kū kūʻē ʻana o ka wā a me ka hydrophobicity, e kūpono ana i nā uhi kiʻekiʻe a i ʻole nā noi kūlohelohe kūikawā.
Copolymerization a i ʻole ka hoʻololi hoʻololi ʻana
Ma ka hoʻokomo ʻana i nā comonomers (e like me nā acrylates) a i ʻole nā mea hoʻohui cross-linking (e like me ka epoxy resins) e hana i kahi pūnaewele hoʻopili keʻa, ua hoʻomaikaʻi ʻia ke kūpaʻa wai a me ka hiki ke mānoanoa o HEC. No ka laʻana, me ka hoʻohana ʻana i ka HEC i hoʻololi ʻia i ka hydrophobically i nā emulsion polymer hiki ke hoʻonui i ka hopena paʻa a me ka mānoanoa o ka emulsion.
Hoʻololi kino
Ke hoʻohana nei i ka adsorption surface a i ʻole ka ʻenehana uhi, ua uhi ʻia nā molekala hydrophobic ma ka ʻili o HEC e hana i kahi hydrophobicity. He ʻano maʻalahi kēia ʻano a kūpono i nā noi me nā koi kiʻekiʻe no ka paʻa kemika, e like me ka meaʻai a me ka lāʻau lapaʻau.
Hoʻololi hui hydrophobic
Ma ka hoʻokomo ʻana i kahi liʻiliʻi o nā pūʻulu hydrophobic ma ka mole HEC, hana ia i kahi hui hui i loko o ka hoʻonā wai, a laila e hoʻomaikaʻi ai i ka hiki ke mānoanoa. Hoʻohana nui ʻia kēia ʻano hana i ka hoʻomohala ʻana i nā mānoanoa hana kiʻekiʻe a kūpono no ka uhi ʻana, nā mea ʻaila hinu a me nā māla ʻē aʻe.
Hoʻololi Hydrophobic ohydroxyethyl celluloseHe mea koʻikoʻi ia e hoʻomaikaʻi ai i kāna hana noi, hiki ke hoʻonui i kona hiki ke mānoanoa, kūpaʻa emulsification, kūpaʻa wai a me nā waiwai rheological. ʻO nā ʻano hoʻololi maʻamau e pili ana i ka grafting pūʻulu hydrophobic, copolymerization a i ʻole cross-linking hoʻololi, hoʻololi kino a me ka hoʻololi ʻana i ka hui hydrophobic. Hiki i ke koho kūpono o nā ʻano hoʻololi ke hoʻoikaika i ka hana o HEC e like me nā koi noi like ʻole, i mea e pāʻani ai i kahi ʻoi aku ka nui ma nā kahua he nui e like me ka uhi ʻana i ka hale kiʻi, nā kemika oilfield, mālama pilikino, a me nā lāʻau lapaʻau.
Ka manawa hoʻouna: Mar-25-2025