Ether ya selile irashobora kunoza cyane imikorere ya minisiteri itose, kandi ninyongera nyamukuru igira ingaruka kumyubakire ya minisiteri. Guhitamo gushyira mu gaciro ethers ya selile yubwoko butandukanye, viscosities zitandukanye, ingano zingana zingana, dogere zitandukanye za viscosity hamwe n’amafaranga yongeweho bizagira ingaruka nziza kumikorere yimikorere ya poro yumye. Kugeza ubu, amabuye menshi yo kubumba no guhomeka afite imikorere idahwitse yo gufata amazi, kandi amazi yatandukanijwe nyuma yiminota mike ihagaze. Kugumana amazi nigikorwa cyingenzi cya methyl selulose ether, kandi nigikorwa kandi benshi mubakora uruganda rwumye-ruvanze na minisiteri, cyane cyane abo mukarere ka majyepfo bafite ubushyuhe bwinshi, bitondera. Ibintu bigira ingaruka ku gufata amazi ya poro yumye yumye harimo ingano yinyongera, ubwiza, ubwiza bwibice, hamwe nubushyuhe bwibidukikije.
Kubika amazi ya selile ether
Mu gukora ibikoresho byubaka, cyane cyane ifu yumye yumye, selile ether igira uruhare rudasubirwaho, cyane cyane mugukora minisiteri idasanzwe (minisiteri yahinduwe), nikintu cyingenzi kandi cyingenzi. Uruhare rwingenzi rwa selulose ether-ether-ether-ether muri minisiteri ahanini ifite ibintu bitatu, kimwe nubushobozi buhebuje bwo gufata amazi, ikindi ni ingaruka ku guhuza hamwe na thixotropy ya minisiteri, naho icya gatatu ni imikoranire na sima. Ingaruka yo gufata amazi ya selile ya selile biterwa no kwinjiza amazi kurwego rwibanze, imiterere ya minisiteri, ubunini bwikigero cya minisiteri, amazi akenerwa na minisiteri, nigihe cyo kugenera ibikoresho. Kugumana amazi ya selile ether ubwayo bituruka kumashanyarazi no kubura umwuma wa selile ubwayo. Nkuko twese tubizi, nubwo urunigi rwa selile ya selile irimo umubare munini wamatsinda ya OH afite ingufu nyinshi, ntabwo ashonga mumazi, kuko imiterere ya selile ifite urwego rwo hejuru rwa kristu. Ubushobozi bwo kuyobora amatsinda ya hydroxyl yonyine ntibihagije kugirango uhuze imigozi ikomeye ya hydrogène nimbaraga za van der Waals hagati ya molekile. Kubwibyo, irabyimba gusa ariko ntishonga mumazi. Iyo insimburangingo yinjijwe mumurongo wa molekile, ntabwo insimburangingo yangiza urunigi rwa hydrogène gusa, ariko kandi isano ya hydrogène ihuza imiyoboro irasenywa bitewe no guhuza insimburangingo hagati yiminyururu yegeranye. Ninini isimbuye, niko intera iri hagati ya molekile. Intera nini. Ingaruka nini zo gusenya imigozi ya hydrogène, ether ya selulose ihinduka amazi-nyuma ya latulice ya selile yagutse kandi igisubizo kikinjira, kigakora igisubizo cyinshi cyane. Iyo ubushyuhe buzamutse, hydrated ya polymer igabanuka, kandi amazi ari hagati yiminyururu yirukanwa. Iyo ingaruka zo kubura umwuma zihagije, molekile zitangira kwegeranya, zikora imiterere-yimiterere-yimiterere-itatu igizwe na gel hanyuma ikazunguruka.
Muri rusange, uko ubukonje buri hejuru, ningaruka nziza yo gufata amazi. Nyamara, uko hejuru yubukonje nuburemere bwa molekuline, kugabanuka gukwiranye kwayo bizagira ingaruka mbi kumbaraga no mumikorere ya minisiteri. Iyo hejuru yubukonje, niko bigaragara ingaruka zo kubyimba kuri minisiteri, ariko ntabwo ihwanye neza. Iyo hejuru yubusembwa, niko amabuye atose azarushaho kuba meza, ni ukuvuga mugihe cyubwubatsi, bigaragarira nko kwizirika kuri scraper no gufatira hejuru kuri substrate. Ariko ntabwo ari byiza kongera imbaraga zimiterere ya minisiteri yonyine. Mugihe cyo kubaka, imikorere irwanya sag ntabwo igaragara. Ibinyuranye na byo, bimwe mu biciriritse kandi bito ariko byahinduwe na methyl selulose ethers bifite imikorere myiza mugutezimbere imiterere yimiterere ya minisiteri.
Umubyimba na Thixotropy ya Cellulose Ether
Hariho kandi umurongo mwiza uhuza umurongo hagati ya sima paste na dosiye ya selile ether. Cellulose ether irashobora kongera cyane ubwiza bwa minisiteri. Ninini nini, niko bigaragara ingaruka. Umuvuduko mwinshi wa selileose ether amazi yo mumazi afite thixotropy nyinshi, nayo nikintu gikomeye kiranga selile ether.
Kubyimba biterwa nurwego rwa polymerisation ya selile ya selile, kwibanda kumuti, igipimo cyogosha, ubushyuhe nibindi bihe. Umutungo wa gelling wigisubizo wihariye kuri alkyl selulose nibiyikomokaho. Imiterere ya gelation ifitanye isano nurwego rwo gusimbuza, kwibanda kubisubizo hamwe ninyongera. Kuri hydroxyalkyl yahinduwe ikomokaho, imiterere ya gel nayo ifitanye isano nimpinduka ya hydroxyalkyl. Kubijyanye n'ubukonje buke MC na HPMC, hashobora gutegurwa 10% -15% igisubizo, ubukonje buciriritse MC na HPMC burashobora gutegurwa igisubizo cya 5% -10%, mugihe ubukonje bwinshi MC na HPMC bushobora gutegura igisubizo 2% -3% gusa, kandi Mubisanzwe ibyiciro bya viscosity ya selulose ether nayo igabanywa na 1% -2% igisubizo. Uburemere buke bwa selile selile ether ifite ubushobozi bwo kubyimba cyane. Mubisubizo bimwe byo kwibandaho, polymers ifite uburemere butandukanye bwa molekile ifite viscosities zitandukanye. Urwego rwo hejuru. Intego yo kwiyegereza irashobora kugerwaho gusa wongeyeho umubare munini wuburemere buke bwa selile selile. Ubukonje bwabwo ntaho butaniye nigipimo cyogosha, kandi ubukonje bwinshi bugera ku ntego yo kwiyegereza, kandi amafaranga asabwa yongeweho ni make, kandi ubwiza buterwa no kubyimba neza. Kubwibyo, kugirango ugere kumurongo runaka, umubare munini wa selile ya selile (kwibanda kumuti) hamwe nubwiza bwibisubizo bigomba kwemezwa. Ubushyuhe bwa gel bwumuti nabwo bugabanuka kumurongo hamwe no kwiyongera kwumuti wibisubizo, hamwe na geles mubushyuhe bwicyumba nyuma yo kugera kumurongo runaka. Ubunini bwa HPMC buri hejuru cyane mubushyuhe bwicyumba.
Gusubira inyuma kwa Cellulose Ether
Igikorwa cya gatatu cya selile ether ni ugutinza inzira ya hydrata ya sima. Cellulose ether itanga minisiteri nibintu bitandukanye byingirakamaro, kandi ikanagabanya ubushyuhe bwambere bwa hydrata ya sima kandi bigatinda inzira ya hydrata dinamike ya sima. Ibi ntabwo ari byiza gukoresha ikoreshwa rya minisiteri mu turere dukonje. Ingaruka yo kudindira iterwa na adsorption ya selile ya selile ya selile kubicuruzwa bitanga amazi nka CSH na ca (OH) 2. Bitewe no kwiyongera kwijimye ryumuti wa pore, selile ya selile igabanya umuvuduko wa ion mugisubizo, bityo bigatinda inzira yo gufata amazi. Iyo hejuru ya selulose ether yibikoresho bya minerval gel, niko bigaragara ingaruka zo gutinda kwa hydration. Cellulose ether ntabwo idindiza igenamigambi gusa, ahubwo inadindiza inzira yo gukomera ya sisitemu ya sima. Ingaruka zo kudindiza selile ya selile ntabwo ziterwa gusa nubunini bwayo muri sisitemu ya minerval gel, ahubwo binaterwa nimiterere yimiti. Urwego rwo hejuru rwa methylation ya HEMC, nibyiza ingaruka zo kudindiza selile. Ikigereranyo cyo gusimbuza hydrophilique nogusimbuza kongera amazi Ingaruka zo kudindiza zirakomeye. Nyamara, ubwiza bwa selulose ether ntacyo bugira kuri sima hydration kinetics.
Muri minisiteri, selile ya selile igira uruhare mu gufata amazi, kubyimba, gutinda ingufu za sima, no kunoza imikorere yubwubatsi. Ubushobozi bwiza bwo gufata amazi butuma amazi ya sima arushaho kuba meza, arashobora kongera ubwiza bwamazi ya minisiteri itose, kongera imbaraga zo guhuza za minisiteri, no guhindura igihe. Ongeramo selile ether kuri mashini yo gutera imashini irashobora kunoza imikorere yo gutera cyangwa kuvoma hamwe nimbaraga zimiterere ya minisiteri. Kubwibyo, selulose ether ikoreshwa cyane nkinyongera yingenzi muri minisiteri ivanze
Igihe cyo kohereza: Ukuboza-26-2022