Iyo hejuru ya viscosity ya hydroxypropyl methylcellulose, niko imikorere yo gufata amazi ari nziza. Viscosity nikintu cyingenzi kumikorere ya HPMC. Kugeza ubu, abakora HPMC batandukanye bakoresha uburyo nibikoresho bitandukanye kugirango bapime ubwiza bwa HPMC. Uburyo nyamukuru ni Haake Rotovisko, Hoppler, Ubbelohde na Brookfield.
Kubicuruzwa bimwe, ibisubizo bya viscosity byapimwe nuburyo butandukanye biratandukanye cyane, ndetse bimwe biratandukanye kabiri. Kubwibyo, mugihe ugereranije viscosities, menya neza kubikora hagati yuburyo bumwe bwo gupima, harimo ubushyuhe, spindle, nibindi.
Kubijyanye nubunini bwibice, nibyiza ibice, nibyiza kubika amazi. Iyo uduce twinshi twa selulose ether duhuye namazi, hejuru ihita ishonga kugirango ikore gel, ipfunyika ibintu kandi ikabuza gukomeza kwinjiza molekile zamazi. . Ifite ahanini ingaruka zo gufata amazi ya selile ya selile, kandi gukemura ni kimwe mubintu byo guhitamo selile. Ubwiza nabwo bwerekana imikorere yingenzi ya methylcellulose ether. MC ikoreshwa muri minisiteri yumye isabwa kuba ifu, hamwe nubushuhe buke, kandi ubwiza nabwo busaba 20% kugeza 60% byubunini buke butarenze 63um. Ubwiza bugira ingaruka kuri hydroxypropyl methylcellulose ether. Ubusanzwe MC isanzwe ni granular kandi irashobora gushonga byoroshye mumazi idatetse, ariko igipimo cyo kuyasesa kiratinda cyane, ntabwo rero gikwiriye gukoreshwa mumashanyarazi yumye. Muri minisiteri yumye, MC ikwirakwizwa mubikoresho bya sima nka agregate, kuzuza neza na sima. Gusa ifu nziza ihagije izarinda methylcellulose ether gutitira iyo ivanze namazi. Iyo MC yongeyeho amazi yo gushonga igiteranyo, biragoye gutatanya no gushonga. MC ifite ubwiza buke ntabwo itera imyanda gusa, ahubwo inagabanya imbaraga zaho za minisiteri. Iyo ubu bwoko bwa minisiteri yumye yubatswe ahantu hanini, umuvuduko wo gukiza wa minisiteri yumye uragabanuka cyane, kandi gucika bibaho kubera ibihe bitandukanye byo gukira. Kuri spray mortar ukoresheje imashini yubaka, ubwiza burakenewe kubera igihe gito cyo kuvanga.
Muri rusange, uko ubukonje buri hejuru, ningaruka nziza yo gufata amazi. Nyamara, hejuru yuburemere nuburemere bwa molekuline ya MC, kugabanuka gukwiranye no gukemuka, bigira ingaruka mbi kumbaraga no mumikorere yubwubatsi. Iyo hejuru ya viscosity, niko bigaragara cyane kubyimbye bya minisiteri, ariko ntabwo bihwanye. Iyo hejuru ya viscosity, ifata minisiteri itose. Bizomeka kuri scraper mugihe cyubwubatsi kandi bifatanye cyane na substrate. Ariko ntacyo ikora kugirango yongere imbaraga zimiterere ya minisiteri itose ubwayo. Mugihe cyubwubatsi, imikorere yo kurwanya sag ntiyagaragaye. Ibinyuranye, ethers zimwe na zimwe za methylcellulose zahinduwe zifite imiterere myiza mugutezimbere imbaraga zimiterere ya minisiteri itose.
Umubare munini wa selulose ether wongeyeho muri minisiteri, niko imikorere myiza yo gufata amazi, hamwe nubukonje bwinshi, nuburyo bwiza bwo gufata amazi.
Ubwiza bwa HPMC nabwo bugira ingaruka runaka kububiko bwamazi. Muri rusange, kuri methyl selulose ethers ifite ubwiza bumwe ariko bwiza butandukanye, mugihe umubare wongeyeho ari umwe, nibyiza, nibyiza byo gufata amazi.
Kugumana amazi ya HPMC nabyo bifitanye isano n'ubushyuhe bwo gukoresha. Kugumana amazi ya methylcellulose ether bigabanuka uko ubushyuhe bwiyongera. Nyamara, mubikorwa bifatika, minisiteri yumye ikunze kubakwa kubutaka bushyushye hamwe nubushyuhe bwo hejuru (hejuru ya dogere 40) ahantu henshi, nko guhomeka neza kurukuta rwinyuma munsi yizuba ryizuba, akenshi byihutisha gukomera kwa sima no guhindura ibara rya sima. gukomera. Amabuye yumye. Kugabanuka kw'ifata ry'amazi birerekana neza ko gukora no kurwanya ibice bizagira ingaruka, kandi ni ngombwa cyane cyane kugabanya ingaruka ziterwa n'ubushyuhe mubihe nkibi. Nubwo inyongeramusaruro ya methylhydroxyethylcellulose ether ifatwa nkiri ku isonga mu iterambere ry’ikoranabuhanga, kuba biterwa n'ubushyuhe birashobora gutuma intege nke za minisiteri yumye. Nubwo igipimo cya methylhydroxyethylcellulose (formula ya Xia) cyariyongereye, uburyo bwo gutunganya no kurwanya ibice ntibwashoboye guhaza ibikenewe gukoreshwa. Binyuze mu buvuzi budasanzwe, nko kongera urugero rwa etherification, nibindi, MC irashobora gukomeza gufata neza amazi kubushyuhe bwinshi, bityo igatanga imikorere myiza mubihe bibi.
Igihe cyo kohereza: Gashyantare-06-2024