Cellulose ether yahinduwe sima slurry

Ingaruka yimiterere ya molekulire itandukanye ya selile itari ionic selile kumiterere ya pore ya sima ya sima yakozwe nubushakashatsi bwakozwe nubushakashatsi bwakozwe na macroscopique na microscopique pore yubatswe.Ibisubizo byerekana ko nonheric selulose ether ishobora kongera ububobere bwa sima.Iyo viscosity ya non-ionic selulose ether yahinduwe slurry isa, porosity yahydroxyethyl selulose ether.Hasi uburemere bwa viscosity / ugereranije na molekuline yuburemere bwa HPMC selulose ether hamwe nibintu bisa mumatsinda, ntoya ntoya ya sima yahinduwe.Ether idafite ionic selulose ether irashobora kugabanya ubuso bwubuso bwicyiciro cyamazi kandi bigatuma sima yoroshye gukora byoroshye.Molekules zitari ionic selulose ether zerekanwe mubyerekezo bya gazi-yamazi ya bubble, nayo ikongerera ubwiza bwicyiciro cya sima kandi ikongerera ubushobozi bwa sima kugirango ihagarike ibibyimba.

Amagambo y'ingenzi:nonionic selulose ether;Isima ya sima;Imiterere ya pore;Imiterere ya molekulari;Ubushyuhe bwo hejuru;ububobere

Nonionic selulose ether (nyuma yiswe selulose ether) ifite umubyimba mwinshi no kubika amazi, kandi ikoreshwa cyane mumashanyarazi avanze yumye, yikorera beto hamwe nibindi bikoresho bishya bishingiye kuri sima.Ether ya selile ikoreshwa mubikoresho bishingiye kuri sima mubisanzwe harimo methyl selulose ether (MC), hydroxypropyl methyl selulose ether (HPMC), hydroxyethyl methyl selulose ether (HEMC) na hydroxyethyl selulose ether (HEC), muri byo HPMC na HEMC nibisanzwe bikoreshwa cyane. .

Cellulose ether irashobora guhindura cyane imiterere ya pore ya sima.Pourchez n'abandi, binyuze mu kizamini kigaragara, gupima ubunini bwa pore (uburyo bwo gutera inshinge za mercure) hamwe no gusesengura amashusho ya sEM, bashoje bavuga ko ether ya selile ishobora kongera umubare wa pore ifite diameter ya 500nm na pore ifite diameter ya 50-250μm muri sima.Byongeye kandi, kubutaka bwa sima bukomeye, Ubunini bwa pore ikwirakwizwa ryuburemere buke bwa molekile HEC yahinduye sima ya sima isa niy'isima nziza.Ubwinshi bwa pore yuburemere buke bwa molekuline HEC yahinduye sima ya sima irarenze iy'isima ya sima isukuye, ariko iri munsi yubwa HPMC yahinduwe sima hamwe na hamwe.Binyuze mu kureba SEM, Zhang n'abandi.yasanze HEMC ishobora kongera cyane umubare wibyobo bifite diameter ya 0.1mm muri sima ya sima.Basanze kandi binyuze mu gupima inshinge za mercure ko HEMC ishobora kongera cyane ingano ya pore yose hamwe nimpuzandengo ya pore diameter ya sima ya sima, bigatuma habaho kwiyongera cyane mumibare minini ifite diameter ya 50nm ~ 1μm na pore nini ifite diameter ya byinshi kurenza 1 mm.Nyamara, umubare wibyobo bifite diameter munsi ya 50nm wagabanutse cyane.Saric-Coric n'abandi.yizeraga ko selile ya ether yatuma sima itobora cyane kandi bigatuma macropore yiyongera.Jenni n'abandi.yagerageje ubucucike bw'imikorere maze yemeza ko igice kinini cya pore ya HEMC yahinduwe na sima ya sima yari hafi 20%, mugihe isima ya sima yuzuye irimo umwuka muke.Silva n'abandi.wasanze usibye impinga ebyiri kuri 3.9 nm na 40 ~ 75nm nkibisaka bya sima nziza, hari nimpinga ebyiri kuri 100 ~ 500nm kandi zirenga 100μm hakoreshejwe ikizamini cyo gutera inshinge.Ma Baoguo n'abandi.yasanze selulose ether yongereye umubare wimyenge myiza ifite diametero zitarenze 1 mm na pore nini zifite diametero zirenga 2 mm muri sima ya sima binyuze mugupima inshinge za mercure.Kubijyanye nimpamvu ituma selulose ether yongerera ubukana bwa sima ya sima, mubisanzwe abantu bemeza ko ether ya selile ifite ibikorwa byubuso, ikungahaza mukirere cyamazi n’amazi, igakora firime, kugirango ihagarike ibibyimba muri sima.

Binyuze mu isesengura ryibitabo byavuzwe haruguru, birashobora kugaragara ko ingaruka za selulose ether kumiterere ya pore yibikoresho bishingiye kuri sima byitabiriwe cyane.Nyamara, hari ubwoko bwinshi bwa selile ether, ubwoko bumwe bwa selile ya selile, uburemere bwayo bugereranije, uburemere bwamatsinda hamwe nibindi bipimo byimiterere ya molekile nabyo biratandukanye cyane, kandi abashakashatsi bo murugo ndetse nabanyamahanga kubijyanye no gutoranya selile ya selile bigarukira gusa kubyo babisabye. umurima, kubura guhagararirwa, umwanzuro byanze bikunze "kurenza urugero", kugirango ibisobanuro byuburyo bwa selile ether ntabwo byimbitse bihagije.Muri iyi nyandiko, ingaruka za selulose ether zifite imiterere ya molekile zitandukanye kumiterere ya pore ya sima ya sima yakozwe nubushakashatsi bwikigereranyo bugaragara hamwe na macroscopique na microscopique pore yubatswe.

1. Ikizamini

1.1 Ibikoresho bibisi

Isima yari P · O 42.5 sima isanzwe ya Portland yakozwe na Huaxin Cement Co, LTD., Aho imiti yapimwe na AXIOS Ad-Vanced yumurambararo wo mu bwoko bwa X-ray fluorescence spectrometer (PANa - lytical, Ubuholandi), icyiciro cyicyiciro cyagereranijwe nuburyo bwa Bogue.

Ether ya selulose yahisemo ubwoko bune bwubucuruzi bwa selile yubucuruzi, methyl selulose ether (MC), hydroxypropyl methyl selulose ether (HPMC1, HPMC2) na hydroxyethyl selulose ether (HEC), imiterere ya molekile ya HPMC1 na HPMC2 bisa, ariko ubukonje buri munsi ya HPMC2 , Nukuvuga ko, misile igereranije ya HPMC1 ni nto cyane ugereranije na HPMC2.Kubera imiterere isa na hydroxyethyl methyl selulose ether (HEMc) na HPMC, HEMCs ntabwo zatoranijwe muri ubu bushakashatsi.Kugirango wirinde ingaruka ziterwa nubushuhe kubisubizo byikizamini, ether zose za selile yatetse kuri 98 ℃ kuri 2h mbere yo kuyikoresha.

Ubwiza bwa selulose ether bwageragejwe na NDJ-1B rotary viscosimeter (Sosiyete ya Shanghai Changji).Ikigereranyo cyibisubizo byibisubizo (igipimo rusange cya selile ether n'amazi) cyari 2.0%, ubushyuhe bwari 20 ℃, naho kuzenguruka byari 12r / min.Ubusumbane bwubuso bwa selile ether bwageragejwe nuburyo bwimpeta.Igikoresho cyo kwipimisha cyari JK99A yikora tensiometero (Sosiyete ya Shanghai Zhongchen).Ubwinshi bwibisubizo byikizamini byari 0.01% naho ubushyuhe bwari 20 ℃.Itsinda rya selile ya ether itangwa nuwabikoze.

Ukurikije ubukonje, impagarara zubuso hamwe nitsinda rya selile ya ether ya selile, mugihe igisubizo cyibisubizo ari 2.0%, igipimo cyubwiza bwibisubizo bya HEC na HPMC2 ni 1: 1.6, naho igipimo cyubwiza bwibisubizo bya HEC na MC ni 1: 0.4, ariko muri iki kizamini, igipimo cyamazi-sima ni 0.35, igipimo kinini cya sima ni 0,6%, igipimo rusange cya selile ya ether na selile ni 1.7%, munsi ya 2.0%, hamwe ningaruka ziterwa na sima ya sima kumitsi, bityo rero itandukaniro rya viscosity ya HEC, HPMC2 cyangwa MC yahinduwe sima slurry ni nto.

Ukurikije ibishishwa, impagarara zubuso hamwe nitsinda rya selile ya ether, uburemere bwubuso bwa buri selile ya selile iratandukanye.Ether ya selile ifite amatsinda yombi ya hydrophilique (hydroxyl na ether groupe) hamwe na hydrophobique (methyl na glucose carbone impeta), ni surfactant.Cellulose ether iratandukanye, ubwoko nibirimo mumatsinda ya hydrophilique na hydrophobique biratandukanye, bikavamo impagarara zitandukanye.

1.2 Uburyo bwo kugerageza

Hateguwe ubwoko butandatu bwa sima ya sima, harimo sima ya sima isukuye, eferi enye ya selile (MC, HPMCl, HPMC2 na HEC) yahinduye sima ifite 0,60% ya sima na HPMC2 yahinduye sima hamwe na 0.05% bya sima.Ref, MC - 0.60, HPMCl - 0.60, Hpmc2-0.60.HEC 1-0.60 na hpMC2-0.05 byerekana ko igipimo cyamazi-sima byombi ari 0.35.

Isima ya sima yabanje gukurikiza GB / T 17671 1999 "uburyo bwo gupima imbaraga za sima ya minisiteri (uburyo bwa ISO)" bwakozwe muri 40mm × 40mm × 160mm ya test primaire, hashingiwe kuri 20 ℃ ifunze ikiza 28d.Nyuma yo gupima no kubara ubucucike bwayo bugaragara, yacitsemo inyundo ntoya, maze imiterere ya macro yo mu gice cyo hagati yikizamini cyaragaragaye kandi ifotorwa hamwe na kamera ya digitale.Muri icyo gihe, uduce duto twa 2,5 ~ 5.0mm twajyanywe no kurebwa na microscope optique (HIROX ya microscope yerekana amashusho atatu) na scanne electron microscope (JSM-5610LV).

2. Ibisubizo by'ibizamini

2.1 Ubucucike bugaragara

Ukurikije ubucucike bugaragara bwa sima yahinduwe na ether zitandukanye za selile, (1) ubucucike bugaragara bwa sima ya sima ni yo hejuru, ni 2044 kg / m³;Ubucucike bugaragara bwubwoko bune bwa selulose ether yahinduye ibishishwa hamwe na sima ya 0,60% yari 74% ~ 88% yubutaka bwa sima isukuye, byerekana ko ether ya selulose yatumye ubwiyongere bwimyanda ya sima..Ubukonje bwa HEC, HPMC2 na MC bwahinduwe bwa sima burasa, ariko ubucucike bugaragara bwa HEC bwahinduwe bwa sima ni bwo buri hejuru, byerekana ko ububobere bwa HEC bwahinduwe bwa sima ari buto ugereranije nubwa HPMc2 na Mc bwahinduye sima hamwe nubwiza busa. .HPMc1 na HPMC2 bifite ibice bisa mumatsinda, ariko ubwiza bwa HPMCl buri hasi cyane ugereranije nubwa HPMC2, kandi ubucucike bugaragara bwa HPMCl bwahinduwe bwa sima bwarushijeho kuba bwiza ugereranije nubwa HPMC2 bwahinduwe bwa sima, ibyo bikaba byerekana ko mugihe ibikubiye mumatsinda bisa , hepfo ya viscosity ya selulose ether, hepfo ya porosity ya sima yahinduwe.. gusebanya ni bito cyane.

2.2 Pore ya Macroscopique

Ukurikije igice cyamafoto ya selulose ether yahinduwe ya sima yafashwe na kamera ya digitale, sima ya sima yuzuye ni nyinshi cyane, hafi ya byose ntago bigaragara;Ubwoko bune bwa selulose ether yahinduwe slurry hamwe na 0,60% igereranyo cya sima byose bifite imyenge myinshi ya macroscopique, byerekana ko selile ya selile itera kwiyongera kwa sima.Bisa nibisubizo byubushakashatsi bugaragara, ingaruka zubwoko butandukanye bwa selulose ether nibirimo kubintu bya sima slurry biratandukanye.Ubukonje bwa HEC, HPMC2 na MC bwahinduwe burasa, ariko ububobere bwa HEC bwahinduwe ni buto ugereranije nubwa HPMC2 na MC bwahinduwe.Nubwo HPMC1 na HPMC2 bifite ibice bisa mumatsinda, HPMC1 yahinduye ibishishwa hamwe nubucucike bwo hasi ifite ububobere buke.Iyo igipimo cya sima-kuri-sima ya HPMc2 yahinduwe cyoroshye ni gito cyane (0,05%), umubare wa poro ya macroscopique wiyongereyeho gato ugereranije nu sima ya sima, ariko wagabanutse cyane ugereranije nu HPMC2 yahinduwe na sima 0,60%. Ikigereranyo.

2.3 Icyorezo cya Microscopique

4. Umwanzuro

(1) Ether ya selile irashobora kongera ububobere bwa sima.

. sima;Hasi uburemere bwa viscosity / ugereranije na molekuline yuburemere bwa HPMC selulose ether hamwe nibintu bisa mumatsinda, niko hasi ya porosity ya sima yahinduwe.

. ibibyimba byamazi ya adsorption mumyanya ya gazi-yamazi, itezimbere imbaraga za firime ya bubble kandi ushimangire ubushobozi bwicyondo gikomeye kugirango uhagarike igituba.