ʻO ka nānā ʻana i nā kumu no ka hopena o nā ʻano hoʻohui hydroxyethyl cellulose like ʻole ma ka ʻōnaehana pena latex

ʻO ke ʻano hoʻomānoanoa ohydroxyethyl celluloseʻO ke kumu o kēia, ʻo ia ka hoʻonui ʻana i ka viscosity ma o ka hoʻokumu ʻana o nā pilina hydrogen intermolecular a me intramolecular, a me ka hydration a me ke kaulahao entanglement o nā kaulahao molekala. No laila, hiki ke hoʻokaʻawale ʻia ke ʻano mānoanoa o ka hydroxyethyl cellulose i ʻelua ʻano: ʻo kekahi ke kuleana o nā pilina hydrogen intermolecular a me intramolecular. Hoʻopili ke kaulahao nui hydrophobic me nā molekala wai a puni ma o nā pilina hydrogen, kahi e hoʻomaikaʻi ai i ka fluidity o ka polymer ponoʻī. Hoʻemi ka nui o nā ʻāpana i kahi no ka neʻe manuahi o nā ʻāpana, a laila e hoʻonui ai i ka viscosity o ka ʻōnaehana; ʻo ka lua, ma o ka entanglement a me ka overlapping o nā kaulahao molekala, aia nā kaulahao cellulose i loko o kahi ʻōnaehana pūnaewele ʻekolu-dimensional i loko o ka ʻōnaehana holoʻokoʻa, a laila e hoʻomaikaʻi ai i ka viscosity.

E nānā kākou pehea e hana ai ka cellulose i kahi kuleana i ke kūpaʻa o ka mālama ʻana o ka ʻōnaehana: ʻo ka mea mua, ʻo ke kuleana o nā pilina hydrogen e kaupalena i ke kahe o ka wai manuahi, e hana i kahi kuleana i ka paʻa ʻana o ka 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 Hoʻokumu ka lap entanglement i kahi pūnaewele cross-linked a i ʻole kahi kaʻawale ma waena o nā pigments, nā mea hoʻopihapiha a me nā ʻāpana emulsion, kahi e pale ai i ka hoʻonohonoho ʻana.

ʻO ka hui pū ʻana o nā ʻano hana ʻelua i luna nei e hiki aihydroxyethyl cellulosei ka loaʻa ʻana o kahi hiki ke hoʻomaikaʻi i ke kūpaʻa mālama. I ka hana ʻana o ka pena latex, hoʻonui ʻia ka HEC i hoʻohui ʻia i ka wā o ke kuʻi ʻana a me ka hoʻopuehu ʻana me ka hoʻonui ʻana o ka ikaika o waho, piʻi ka gradient wikiwiki shear, hoʻonohonoho ʻia nā molekala ma ke kuhikuhi kauoha e like me ke kuhikuhi kahe, a ua luku ʻia ka ʻōnaehana wili lap ma waena o nā kaulahao molekala, kahi mea maʻalahi ke paheʻe me kekahi i kekahi, emi ka viscosity o ka ʻōnaehana. No ka mea he nui nā ʻāpana ʻē aʻe o ka ʻōnaehana (pigments, fillers, emulsions), ʻaʻole hiki i kēia hoʻonohonoho kauoha ke hoʻihoʻi i ke kūlana entangled o ke cross-linking a me ka overlapping ʻoiai inā e kau ʻia no ka manawa lōʻihi ma hope o ka hui ʻana o ka pena. I kēia hihia, hilinaʻi wale ʻo HEC i nā pilina hydrogen. ʻO ka hopena o ka paʻa ʻana o ka wai a me ka mānoanoa e hōʻemi ana i ka pono o ka mānoanoa oHEC, a ua hoʻemi ʻia hoʻi ka hāʻawi ʻana o kēia kūlana hoʻopuehu i ke kūpaʻa mālama o ka ʻōnaehana. Eia nō naʻe, ua hoʻopuehu like ʻia ka HEC i hoʻoheheʻe ʻia i loko o ka ʻōnaehana ma kahi wikiwiki hoʻoulu haʻahaʻa i ka wā hoʻokuʻu ʻia, a ua emi ka hōʻino ʻia o ke ʻano pūnaewele i hana ʻia e ke keʻa ʻana o nā kaulahao HEC. No laila e hōʻike ana i ka pono o ka mānoanoa kiʻekiʻe a me ke kūpaʻa mālama. ʻIke loa, ʻo ka hana like ʻana o nā ʻano mānoanoa ʻelua ke kumu o ka mānoanoa pono o ka cellulose a me ka hōʻoia ʻana i ke kūpaʻa mālama. I nā huaʻōlelo ʻē aʻe, ʻo ke kūlana hoʻoheheʻe a hoʻopuehu ʻia o ka cellulose i loko o ka wai e hoʻopilikia nui i kona hopena mānoanoa a me kāna hāʻawi ʻana i ke kūpaʻa mālama.