Iyo yakakosha pfuma ye cellulose ether mhinduro ndeye rheological pfuma. Iyo yakakosha rheological properties yeakawanda cellulose ethers inoita kuti ishandiswe zvakanyanya munzvimbo dzakasiyana siyana, uye kudzidza kweiyo rheological zvivakwa kunobatsira mukukudziridzwa kweminda mitsva yekushandisa kana kuvandudzwa kwemamwe minda yekushandisa. Li Jing anobva kuShanghai Jiao Tong University akaita ongororo yakarongeka pane rheological properties yeCarboxymethylcellulose (CMC), kusanganisira pesvedzero yeCMC's molecular structure parameters (molecular huremu uye dhigirii rekutsiviwa), concentration pH, uye ionic simba. Mhedzisiro yetsvagiridzo inoratidza kuti zero-shear viscosity yemushonga inowedzera nekuwedzera kwema molecular uremu uye dhigirii rekutsiva. Kuwedzera kwehuremu hwema molecular kunoreva kukura kweketani yemamorekuru, uye kusungirirwa kuri nyore pakati pemamorekuru kunowedzera viscosity yemhinduro; iyo yakakura yekutsiva inoita kuti mamorekuru atambanuke zvakanyanya mumhinduro. Iyo nyika iripo, iyo hydrodynamic vhoriyamu yakakura, uye viscosity inova yakakura. Iyo viscosity yeCMC aqueous solution inowedzera nekuwedzera kwekusungwa, iyo ine viscoelasticity. Iyo viscosity yemushonga inoderera neiyo pH kukosha, uye kana yakaderera pane imwe kukosha, iyo viscosity inowedzera zvishoma, uye pakupedzisira yakasununguka asidhi inoumbwa uye inonaya. CMC i polyanionic polymer, kana ichiwedzera monovalent munyu ions Na+, K+ nhoo, viscosity ichaderera zvinoenderana. Kuwedzerwa kwe divalent cation Caz + kunoita kuti viscosity yemhinduro iderere kutanga uye yobva yawedzera. Kana huwandu hweCa2 + hwakakwirira kupfuura stoichiometric point, CMC mamorekuru anodyidzana neCa2 +, uye superstructure iripo mune mhinduro. Liang Yaqin, North University yeChina, nezvimwewo akashandisa nzira yeviscometer uye nzira yekutenderera yeviscometer kuita tsvakiridzo yakakosha pamusoro peiyo rheological properties ye dilute uye concentrated solutions of modified hydroxyethyl cellulose (CHEC). Mhedzisiro yetsvagiridzo yakawana kuti: (1) Cationic hydroxyethyl cellulose ine yakajairika polyelectrolyte viscosity maitiro mumvura yakachena, uye yakaderedzwa viscosity inowedzera nekuwedzera kwekuisa pfungwa. Iyo intrinsic viscosity ye cationic hydroxyethyl cellulose ine dhigirii yepamusoro yekutsiva yakakura kupfuura iyo ye cationic hydroxyethyl cellulose ine yakaderera dhigirii yekutsiva. (2) Mhinduro ye cationic hydroxyethyl cellulose inoratidzira isiri-Newtonian fluid maitiro uye ine shear thinning maitiro: sezvo mhinduro yehuwandu hwehuwandu hunowedzera, iyo inooneka viscosity inowedzera; mune imwe chiyero chemunyu mhinduro, CHEC inooneka viscosity Inoderera nekuwedzera kwekuwedzera kwemunyu. Pasi peiyo shear rate imwechete, iyo inooneka viscosity yeCHEC muCaCl2 solution system yakakwira zvakanyanya kupfuura yeCHEC muNaCl solution system.
Nekuenderera mberi nekudzika kwetsvakiridzo uye nekuenderera mberi kwekuwedzera kwenzvimbo dzekushandisa, zvivakwa zvemisanganiswa system mhinduro inoumbwa neakasiyana cellulose ethers yakagamuchirawo kutariswa kwevanhu. Semuyenzaniso, sodium carboxymethyl cellulose (NACMC) uye hydroxyethyl cellulose (HEC) inoshandiswa semafuta ekufambisa maajenti muminda yemafuta, ayo ane zvakanakira kusimba kweshear kuramba, kuwanda kwezvinhu mbishi uye kushomeka kusvibiswa kwezvakatipoteredza, asi mhedzisiro yekuzvishandisa chete haina kunaka. Kunyangwe iyo yekutanga iine viscosity yakanaka, inobatwa nyore nereservoir tembiricha uye salinity; kunyangwe iyo yekupedzisira ine yakanaka tembiricha uye munyu kuramba, kugona kwayo kukora kwakashata uye dosi yakakura. Vatsvakurudzi vakavhenganisa mhinduro mbiri idzi uye vakaona kuti viscosity yemusanganiswa wekugadzirisa yakave yakakura, kupikisa kwekushisa uye kuramba kwemunyu kwakagadziridzwa kune imwe nhanho, uye kushandiswa kwekushandiswa kwakasimbiswa. Verica Sovilj et al. vakadzidza rheological maitiro emhinduro yemusanganiswa system inoumbwa neHPMC neNACMC uye anionic surfactant ine inotenderera viscometer. Iyo rheological maitiro eiyo sisitimu zvinoenderana neHPMC-NACMC, HPMC-SDS uye NACMC- (HPMC- SDS) akasiyana mhedzisiro yakaitika pakati.
Iyo rheological properties ye cellulose ether mhinduro inobatwawo nezvinhu zvakasiyana-siyana, senge additives, ekunze mechanical simba uye tembiricha. Tomoaki Hino et al. akadzidza maitiro ekuwedzera nicotine pane rheological properties yehydroxypropyl methylcellulose. Pa25C uye yakaderera kupfuura 3%, HPMC yakaratidza Newtonian fluid maitiro. Apo nicotine yakawedzerwa, viscosity yakawedzera, iyo yakaratidza kuti nicotine yakawedzera kupindika kwe.HPMCmamorekuru. Nicotine pano inoratidza salting mhedzisiro inosimudza gel point uye fog point yeHPMC. Mechanical simba senge shear force inozoitawo imwe pesvedzero pazvinhu zve cellulose ether aqueous solution. Uchishandisa rheological turbidimeter uye diki kona yemwenje yekuparadzira chiridzwa, inowanikwa kuti mune semi-dilute mhinduro, ichiwedzera shear rate, nekuda kwekuveura kusanganiswa, tembiricha yekushanduka kwefog point ichawedzera.
Nguva yekutumira: Kubvumbi-28-2024