ʻO ka mīkini mānoanoa ohydroxyethyl celluloseʻo ia ka hoʻonui ʻana i ka viscosity ma o ka hoʻokumu ʻana i nā paʻa hydrogen intermolecular a intramolecular, a me ka hydration a me ke kaulahao entanglement o nā kaulahao mole. No laila, hiki ke hoʻokaʻawale ʻia ke ʻano mānoanoa o ka hydroxyethyl cellulose i ʻelua mau ʻāpana: ʻo ka hana o ka intermolecular a me ka intramolecular hydrogen paʻa. Hoʻopili ke kaulahao nui hydrophobic me nā molekole wai a puni ma o nā paʻa hydrogen, kahi e hoʻomaikaʻi ai i ka wai o ka polymer ponoʻī. ʻO ka nui o nā'āpana e ho'ēmi i ka manawa no ka neʻeʻana o nā'āpana, a laila e hoʻonui ai i ka viscosity o ka pūnaewele; ʻO ka lua, ma o ka hoʻopili ʻana a me ka uhi ʻana o nā kaulahao mole, aia nā kaulahao cellulose i loko o kahi ʻano pūnaewele ʻekolu-dimensional i ka ʻōnaehana holoʻokoʻa, a laila e hoʻomaikaʻi ai i ka viscosity.
E nānā kākou i ke ʻano o ka cellulose i ka mālama ʻana i ka paʻa o ka ʻōnaehana: ʻo ka mea mua, ʻo ka hana o nā mea paʻa hydrogen kaohi i ke kahe o ka wai manuahi, pāʻani i ka paʻa wai, a kōkua i ka pale ʻana i ka hoʻokaʻawale ʻana o ka wai; ʻO ka lua, ka launa pū ʻana o nā kaulahao cellulose ʻO ka lap entanglement e hoʻokumu i kahi pūnaewele pili keʻa a i ʻole kahi kaʻawale ma waena o nā puaʻa, nā mea hoʻopiha a me nā ʻāpana emulsion, ka mea e pale ai i ka hoʻonohonoho ʻana.
ʻO ka hui pū ʻana o nā ʻano hana ʻelua ma luna nei e hiki aihydroxyethyl cellulosee loaʻa i kahi mana maikaʻi loa e hoʻomaikaʻi i ka paʻa o ka mālama ʻana. I ka hana ʻana i ka pena latex, hoʻohui ʻia ka HEC i ka wā o ka hahau ʻana a me ka hoʻopuehu ʻana me ka piʻi ʻana o ka ikaika o waho, piʻi ka gradient shear velocity, ua hoʻonohonoho ʻia nā molekala i kahi kuhikuhi pololei e like me ke kuhikuhi kahe, a ua luku ʻia ka ʻōnaehana wili ma waena o nā kaulahao mole, he mea maʻalahi ke hoʻoheheʻe ʻia me kekahi, emi ka viscosity ʻōnaehana. No ka mea he nui nā ʻāpana ʻē aʻe o ka ʻōnaehana (pigments, fillers, emulsions), ʻaʻole hiki i kēia hoʻonohonoho hoʻonohonoho ke hoʻihoʻi i ke kūlana i hoʻopaʻa ʻia o ka cross-linking a me ka overlapping ʻoiai ke waiho ʻia no ka manawa lōʻihi ma hope o ka hui ʻana o ka pena. I kēia hihia, hilinaʻi wale ʻo HEC i nā paʻa hydrogen. ʻO ka hopena o ka paʻa ʻana o ka wai a me ka mānoanoa e hōʻemi i ka pono o ka mānoanoa oHEC, a me ka hāʻawi ʻana o kēia mokuʻāina hoʻopuehu i ka mālama paʻa ʻana o ka ʻōnaehana i hoʻemi ʻia e like me ia. Eia nō naʻe, ua hoʻopuehu ʻia ka HEC i hoʻoheheʻe ʻia i loko o ka ʻōnaehana me ka wikiwiki o ka hoʻoulu ʻana i ka wā e hoʻokuʻu ʻia ai, a ʻo ka ʻōnaehana pūnaewele i hoʻokumu ʻia e ka hoʻopili ʻana i nā kaulahao HEC ua emi iki ka pōʻino. No laila e hōʻike ana i ka hana mānoanoa kiʻekiʻe a me ke kūpaʻa mālama. ʻIke loa, ʻo ka hana like o nā ʻano mānoanoa ʻelua ke kumu o ka mānoanoa kūpono o ka cellulose a me ka hōʻoia ʻana i ka paʻa o ka mālama ʻana. I nā huaʻōlelo ʻē aʻe, ʻo ke ʻano o ka cellulose i hoʻoheheʻe ʻia i loko o ka wai e hoʻopilikia koʻikoʻi i kona hopena mānoanoa a me kāna hāʻawi ʻana i ka mālama paʻa.
Ka manawa hoʻouna: Apr-25-2024