Ko te āhuatanga tino nui o te otinga cellulose ether ko tōna āhuatanga rheological. Nā ngā āhuatanga rheological motuhake o te maha o ngā cellulose ethers ka whakamahia whānuitia i roto i ngā momo mara, ā, he pai te ako i ngā āhuatanga rheological ki te whakawhanake i ngā mara tono hou, ki te whakapai ake rānei i ētahi mara tono. I whakahaerehia e Li Jing o Te Whare Wānanga o Shanghai Jiao Tong tētahi rangahau pūnaha mō ngā āhuatanga rheological ote carboxymethylcellulose (CMC), tae atu ki te awe o ngā tawhā hanganga ngota o te CMC (te taumaha ngota me te tohu o te whakakapinga), te pH kukū, me te kaha ionic. E whakaatu ana ngā hua rangahau ka piki ake te matotoru kore-kutikuti o te otinga me te pikinga o te taumaha ngota me te tohu o te whakakapinga. Ko te pikinga o te taumaha ngota ko te tipu o te mekameka ngota, ā, ko te ngāwari o te hononga i waenga i ngā ngota ka piki ake te matotoru o te otinga; ko te nui o te whakakapinga ka nui ake te totoro o ngā ngota i roto i te otinga. Kei te noho te āhua, he nui te rōrahi waiora, ā, ka nui ake te matotoru. Ka piki ake te matotoru o te otinga wai CMC me te pikinga o te kukū, he viscoelasticity. Ka heke te matotoru o te otinga me te uara pH, ā, ina iti iho i tētahi uara, ka paku piki te matotoru, ā, i te mutunga ka hangaia he waikawa kore utu ka puta he putunga. He polymer polyanionic te CMC, ina tāpirihia ngā katote tote monovalent Na+, K+ shield, ka heke te matotoru. Mā te tāpiri i te cation divalent Caz+ ka heke te matotoru o te otinga i te tuatahi, kātahi ka piki ake. Ina teitei ake te kukū o Ca2+ i te pūwāhi stoichiometric, ka taunekeneke ngā ngota CMC ki a Ca2+, ā, ka noho he hanganga o runga i roto i te otinga. I whakamahia e Liang Yaqin, Te Whare Wānanga o Te Tai Tokerau o Haina, me ētahi atu, te tikanga viscometer me te tikanga rotational viscometer hei whakahaere rangahau motuhake mō ngā āhuatanga rheological o ngā otinga waimeha me te kukū o te hydroxyethyl cellulose whakarerekētia (CHEC). I kitea i ngā hua rangahau: (1) He whanonga polyelectrolyte thickness noa iho o te cationic hydroxyethyl cellulose i roto i te wai parakore, ā, ka piki ake te thickness kua whakaitihia me te pikinga o te kukū. Ko te thickness ā-roto o te cationic hydroxyethyl cellulose me te nui o te whakakapinga he nui ake i te cationic hydroxyethyl cellulose me te iti o te whakakapinga. (2) Ko te otinga o te cationic hydroxyethyl cellulose e whakaatu ana i ngā āhuatanga wai kore-Newtonian me ngā āhuatanga angiangi kutikuti: i te pikinga o te kukū papatipu otinga, ka piki ake tōna thickness kitea; i roto i tētahi kukū o te otinga tote, ka heke te thickness kitea CHEC me te pikinga o te kukū tote tāpiri. I raro i te tere kutikuti ōrite, he nui ake te matotoru āhua o te CHEC i roto i te pūnaha otinga CaCl2 i tō te CHEC i roto i te pūnaha otinga NaCl.
I te hohonu haere tonu o te rangahau me te whānui haere tonu o ngā mara tono, kua arohia hoki e te tangata ngā āhuatanga o ngā otinga pūnaha whakauru i hangaia mai i ngā momo cellulose ethers. Hei tauira, ko te sodium carboxymethyl cellulose (NACMC) me te hydroxyethyl cellulose (HEC) e whakamahia ana hei kaihoko nekehanga hinu i roto i ngā mara hinu, he pai ngā painga o te ātete kutikuti kaha, te nui o ngā rauemi mata me te iti o te parahanga taiao, engari kāore i te pai te pānga o te whakamahi i a rātou anake. Ahakoa he pai te matotoru o te mea tuatahi, ka pāngia ngāwari e te pāmahana me te tote o te puna; ahakoa he pai te ātete pāmahana me te tote o te mea tuarua, he ngoikore tōna kaha ki te matotoru, ā, he nui te horopeta. I whakaranua e ngā kairangahau ngā otinga e rua, ā, i kitea kua nui ake te matotoru o te otinga whakahiato, kua pai ake te ātete pāmahana me te ātete tote ki tētahi taumata, ā, kua whakanuia te pānga tono. Kua ako a Verica Sovilj me ētahi atu i te whanonga rheological o te otinga o te pūnaha whakauru i hangaia mai i te HPMC me te NACMC me te surfactant anionic me te viscometer hurihuri. Ko te whanonga rheological o te pūnaha e whakawhirinaki ana ki ngā pānga rerekē i puta i waenganui i a HPMC-NACMC, HPMC-SDS me NACMC- (HPMC-SDS).
Ka pāngia hoki ngā āhuatanga rheological o ngā otinga cellulose ether e ngā āhuatanga maha, pērā i ngā tāpiringa, te kaha miihini o waho me te pāmahana. I ako a Tomoaki Hino me ētahi atu i te pānga o te tāpiritanga o te nikotīni ki ngā āhuatanga rheological o te hydroxypropyl methylcellulose. I te 25C me te kukū iti iho i te 3%, i whakaatu te HPMC i te whanonga wai Newtonian. I te tāpiritanga o te nikotīni, ka piki ake te matotoru, e tohu ana i te whakanui ake o te nikotīni i te hononga oHPMCngā ngota. Kei konei te pānga tote o te nikotīni e whakaara ake ana i te ira tire me te ira kohu o te HPMC. Ka pā anō hoki te kaha miihini pēnei i te kaha kutikuti ki ngā āhuatanga o te wairewa cellulose ether. Mā te whakamahi i te mita turbidimeter rheological me te taputapu marara mārama koki iti, i kitea i roto i te wairewa haurua-wairewa, ka piki ake te tere kutikuti, nā te ranunga kutikuti, ka piki ake te pāmahana whakawhiti o te ira kohu.
Wā tuku: 28 Paenga-whāwhā 2024