I-Cellulose ether, ikakhulukazi i-hydroxypropyl methylcellulose (HPMC), iyisengezo esibalulekile esisetshenziswa ezimbonini ezahlukahlukene ngokusebenza kahle kwayo kokuqina, ukugcinwa kwamanzi okuphezulu, kanye nekhono lokukhulisa i-viscosity. Kulesi sihloko, sizocubungula ukuhlaziya okubanzi kwezakhiwo zokujiya kanye ne-thixotropy ye-cellulose ether, ikakhulukazi sigxile ku-HPMC.
Ukuqina kuyisici esiyisisekelo se-cellulose ether, okubhekisela emandleni ento ukukhulisa i-viscosity yesisombululo noma ukuhlakazwa. I-HPMC ibonisa ukusebenza kahle kokuqina okuphezulu, okusho ukuthi ingakhuphula kakhulu i-viscosity ngisho nasezindaweni eziphansi kakhulu. Lesi sakhiwo sifiseleka kakhulu ezinhlelweni eziningi, njengezinto zokunamathisela, okokugqoka, nemikhiqizo yokunakekelwa komuntu siqu, lapho i-viscosity ephakeme idingeka khona ukuze usebenze kangcono.
Enye yezinzuzo ezibalulekile ze-HPMC amandla ayo okugcina amanzi aphezulu. Ukugcinwa kwamanzi kusho ikhono lento ethile yokugcina amanzi ngaphakathi kwesistimu, ngisho nangaphansi kwamazinga okushisa aphezulu noma lapho kukhona ezinye izinyibilikisi. I-HPMC yakha ukwakheka okufana nejeli lapho inamanzi, esiza ukugcina ama-molecule amanzi futhi ivimbele ukuhwamuka okukhulu. Lesi sakhiwo sibaluleke kakhulu ezimbonini ezifana nokwakha kanye nodaka lwengxube eyomile, lapho ukugcinwa komswakama kubalulekile ukuze kufakwe amanzi ngendlela efanele kanye nokwelashwa kwezinto.
I-viscosity eyengeziwe ehlinzekwa i-cellulose ether, njenge-HPMC, inikeza izinzuzo ezimbalwa ezinhlelweni ezihlukahlukene. Embonini yezokwakha, i-HPMC isetshenziswa ekwakhiweni okusekelwe kusimende ukuze kuthuthukiswe ukusebenza kahle nokuvimbela ukuhlukaniswa. I-viscosity ephezulu yesisombululo se-HPMC ivumela ukulawula okungcono ngesikhathi sokufaka isicelo, ukuqinisekisa ukusabalala okufanayo nokugwema noma yikuphi ukulungiswa kwezinhlayiya. Ngokufanayo, embonini kapende, i-HPMC yengezwa ezimbotsheni ukuze kuthuthukiswe i-viscosity yazo, okuholela ekumbozweni okungcono nokuncipha kokuconsa.
Ngaphezu kwalokho, imvelo ye-thixotropic ye-cellulose ether iyisici esibalulekile okufanele sicatshangelwe. Thixotropy ibhekisela endaweni yezinto ezibonakalayo ukuze kuboniswe ushintsho oluhlehliswayo ku-viscosity lapho kusetshenziswa ingcindezi yokugunda. Ngamagama alula, lapho i-shear force isetshenziswa, impahla iba ne-viscous encane, okuvumela ukusetshenziswa kalula, futhi lapho imile, ibuyela esimweni sayo sokuqala se-viscosity ephezulu. Lesi sakhiwo sizuzisa kakhulu ekusetshenzisweni okunjengama-caulks, ama-sealants, namafutha okugcoba ekhemisi, lapho kudingeka khona ukusabalalisa nokusabalalisa kalula. Ukuziphatha kwe-thixotropic ye-HPMC kuqinisekisa ukusetshenziswa okulula kanye nokumanzisa okuhle kwezindawo, kuyilapho kugcinwa i-viscosity edingekayo yokunamathela nokuvala izakhiwo.
Ukuze ujule ekujuleni kokuqina kanye nezakhiwo ze-thixotropy ze-cellulose ether, ucwaningo olubanzi nokuhlaziywa kwenziwa. Amasu ahlukahlukene, okuhlanganisa izilinganiso ze-rheological, asetshenziswa ukuhlola i-viscosity, i-shear stress, nokuziphatha kwe-thixotropic kwezixazululo ze-cellulose ether. Lezi zifundo zisiza ekuqondeni ubudlelwano phakathi kokugxilisa ingqondo, izinga lokushisa, nezinga le-shear ku-thiening kanye nezakhiwo ze-thixotropy ze-cellulose ether.
Sengiphetha, i-cellulose ether, ikakhulukazi i-HPMC, ibonisa ukusebenza kahle kokuqina okuphezulu, ukugcinwa kwamanzi okuphezulu, nokwanda kwe-viscosity ezinhlelweni ezihlukahlukene. Ikhono layo lokuhlinzeka ngokuziphatha kwe-thixotropic likwenza kube isithasiselo esibalulekile emikhiqizweni lapho isicelo esilula kanye ne-viscosity ephezulu kudingeka ngesikhathi esisodwa. Ukuze uthole ukuqonda okuphelele kwezakhiwo zokujiya kanye ne-thixotropy ye-cellulose ether, kucutshungulwa okubanzi kanye nocwaningo, okuthuthukisa kakhulu ukusetshenziswa kwayo kwezimboni.
Isikhathi sokuthumela: Nov-24-2023