ʻO ka waiwai nui o ka solution cellulose ether kona waiwai rheological. ʻO nā waiwai rheological kūikawā o ka nui o nā cellulose ethers e hoʻohana nui ʻia i nā ʻano hana like ʻole, a ʻo ke aʻo ʻana i nā waiwai rheological he mea pono i ka hoʻomohala ʻana i nā kahua noi hou a i ʻole ka hoʻomaikaʻi ʻana i kekahi mau kahua noi. Ua alakaʻi ʻo Li Jing mai ke Kulanui ʻo Shanghai Jiao Tong i kahi noiʻi ʻōnaehana e pili ana i nā waiwai rheological ocarboxymethylcellulose (CMC), me ka mana o ka CMC's molecular structure parameters (molecular weight and degree of substitution), pH concentration, a me ka ikaika ionic. Hōʻike nā hopena noiʻi i ka piʻi ʻana o ka viscosity zero-shear o ka hopena me ka piʻi ʻana o ke kaumaha molekala a me ke degere o ka hoʻololi ʻana. ʻO ka piʻi ʻana o ka paona molekala ʻo ia ka ulu ʻana o ke kaulahao mole, a ʻo ka hoʻopili maʻalahi ma waena o nā molekala e hoʻonui i ka viscosity o ka hopena; ʻo ka nui o ka hoʻololi ʻana e hoʻolōʻihi i nā molekala i loko o ka hopena. Aia ka moku'āina, nui ka nui hydrodynamic, a nui ka viscosity. Hoʻonui ka viscosity o ka CMC aqueous solution me ka piʻi ʻana o ka ʻike, nona ka viscoelasticity. E emi ana ka viscosity o ka hoʻonā me ka pH waiwai, a i ka wā e emi iho ai ma mua o kekahi waiwai, e piʻi iki ka viscosity, a i ka hopena ua hoʻokumu ʻia ka waikona manuahi a hoʻoheheʻe ʻia. ʻO ka CMC he polyanionic polymer, i ka wā e hoʻohui ai i nā ion paʻakai monovalent Na +, K + pale, e emi ka viscosity e like me ia. ʻO ka hoʻohui ʻana o ka cation divalent Caz+ e hoʻemi mua ai ka viscosity o ka hopena a laila hoʻonui. Ke kiʻekiʻe ka neʻe ʻana o Ca2+ ma mua o ke kiko stoichiometric, pili nā molekala CMC me Ca2+, a aia kahi superstructure i ka hopena. Ua hoʻohana ʻo Liang Yaqin, ke Kulanui ʻĀkau o Kina, a me nā mea ʻē aʻe i ke ʻano viscometer a me ke ʻano viscometer rotational e hana i ka noiʻi kūikawā e pili ana i nā waiwai rheological o nā hoʻonā dilute a me ka concentrated o modified hydroxyethyl cellulose (CHEC). Ua ʻike ʻia nā hopena noiʻi: (1) ʻO ka Cationic hydroxyethyl cellulose he ʻano viscosity polyelectrolyte maʻamau i loko o ka wai maʻemaʻe, a piʻi ka viscosity i hōʻemi ʻia me ka piʻi ʻana o ka noʻonoʻo. ʻOi aku ka nui o ka viscosity intrinsic o ka cationic hydroxyethyl cellulose me ke kiʻekiʻe o ka hoʻololi ʻana ma mua o ka cationic hydroxyethyl cellulose me ka haʻahaʻa haʻahaʻa. (2) Hōʻike ka solution o ka cationic hydroxyethyl cellulose i nā hiʻohiʻona wai non-Newtonian a me nā hiʻohiʻona shear thinning: i ka piʻi ʻana o ka nui o ka hopena, piʻi kona viscosity i ʻike ʻia; i loko o kekahi kukū o ka paʻakai paʻakai, CHEC ike viscosity E emi me ka piʻi o ka hoʻohui paʻakai. Ma lalo o ka helu shear like, ʻoi aku ka kiʻekiʻe o ka viscosity o CHEC i ka ʻōnaehana hoʻonā CaCl2 ma mua o ka CHEC i ka ʻōnaehana hoʻonā NaCl.
Me ka hoʻomau mau ʻana o ka noiʻi ʻana a me ka hoʻonui mau ʻana i nā kahua noi, ua loaʻa pū ka manaʻo o ka poʻe i nā waiwai o nā ʻōnaehana ʻōnaehana i haku ʻia me nā cellulose ethers like ʻole. No ka laʻana, hoʻohana ʻia ka sodium carboxymethyl cellulose (NACMC) a me ka hydroxyethyl cellulose (HEC) ma ke ʻano he mea hoʻoneʻe aila i loko o nā kahua ʻaila, loaʻa nā mea maikaʻi o ka pale ʻana i ka shear ikaika, ka nui o nā mea maka a me ka liʻiliʻi o ka pollution kaiapuni, akā ʻaʻole kūpono ka hopena o ka hoʻohana ʻana iā lākou wale nō. ʻOiai he viscosity maikaʻi ka mua, hiki ke hoʻopili ʻia e ka mahana o ka waihona a me ka paʻakai; ʻoiai he maikaʻi ka mahana a me ka paʻakai o ka mea hope, ʻilihune kona hiki ke mānoanoa a ʻoi aku ka nui o ka dosage. Ua hui pū nā mea noiʻi i nā hopena ʻelua a ʻike ʻia ua ʻoi aku ka nui o ka viscosity o ka solution composite, ua hoʻomaikaʻi ʻia ka pale ʻana o ka mahana a me ka paʻakai i kekahi ʻano, a ua hoʻonui ʻia ka hopena noi. ʻO Verica Sovilj et al. ua aʻo i ka hana rheological o ka hoʻonā o ka ʻōnaehana hui pū ʻia me HPMC a me NACMC a me ka anionic surfactant me kahi viscometer rotational. Aia ke ʻano rheological o ka ʻōnaehana ma HPMC-NACMC, HPMC-SDS a me NACMC- (HPMC-SDS) nā hopena like ʻole i loaʻa ma waena.
Hoʻopili pū ʻia nā waiwai rheological o ka cellulose ether solution e nā ʻano mea like ʻole, e like me nā additives, ka ikaika mechanical waho a me ka mahana. Tomoaki Hino et al. ua aʻo i ka hopena o ka hoʻohui ʻana o ka nicotine i nā waiwai rheological o hydroxypropyl methylcellulose. Ma ka 25C a me ka hoʻohaʻahaʻa haʻahaʻa ma lalo o 3%, hōʻike ʻo HPMC i ka ʻano wai wai Newtonian. I ka hoʻohui ʻia ʻana o ka nicotine, ua hoʻonui ʻia ka viscosity, e hōʻike ana ua hoʻonui ka nicotine i ka entanglement oHPMCnā molekala. Hōʻike ʻo Nicotine ma ʻaneʻi i kahi hopena paʻakai e hoʻokiʻekiʻe i ka lae gel a me ka noe o HPMC. ʻO ka ikaika mīkini e like me ka ikaika shear e loaʻa kekahi mana i nā waiwai o ka cellulose ether aqueous solution. Ke hoʻohana nei i ka rheological turbidimeter a me ka liʻiliʻi liʻiliʻi liʻiliʻi liʻiliʻi liʻiliʻi liʻiliʻi mea hoʻopuehu, ʻike ʻia ma ka hopena semi-dilute, e hoʻonui ana i ka nui o ka shear, ma muli o ka hui pū ʻana, e hoʻonui ʻia ka mahana hoʻololi o ke kiko noe.
Ka manawa hoʻouna: Apr-28-2024