Cellulose Ether Viscosity Guhinduka kuri sima ishingiye

Kubyimba ningaruka zingenzi zo guhindura selile ether kubikoresho bishingiye kuri sima. Ingaruka ziterwa na selile ether, umuvuduko wa viscometer yihuta nubushyuhe kumihindagurikire yimitsi ya selile ya ether yahinduwe simashitingi barigishijwe. Ibisubizo byerekana ko ubwiza bwa simashitingi yiyongera ubudahwema hamwe no kwiyongera kwa selile ya ether, hamwe nubwiza bwumuti wa selile ether na simashitingi ifite "compte superposition effect"; pseudoplastique ya selulose ether yahinduwe simashitingi ni munsi yubwa sima nzizashitingi, hamwe n'ubukonje Hasi umuvuduko wo kuzenguruka igikoresho, cyangwa munsi ya viscosity ya selulose ether yahinduwe simashitingi, cyangwa munsi yibirimo bya selile ether, biragaragara cyane pseudoplastique ya selulose ether yahinduwe simashitingi; Hamwe ningaruka ziterwa na hydration, viscosity ya selulose ether yahinduwe simashitingi biziyongera cyangwa bigabanuke. Ubwoko butandukanye bwa selulose ether ifite impinduka zitandukanye mubwiza bwa sima yahinduweshitingi.

Amagambo y'ingenzi: selile ether; simashitingi; ububobere

0、Ijambo ry'ibanze

Ethers ya selulose ikoreshwa nkibikoresho byo kubika amazi hamwe nubunini bwibikoresho bishingiye kuri sima. Dukurikije insimburangingo zitandukanye, ethers ya selile ikoreshwa mubikoresho bishingiye kuri sima muri rusange harimo methyl selulose (MC), hydroxyethyl selulose (HEC), hydroxyethyl methyl selulose Ether (Hydroxyethyl methyl selulose, HEMC) na hydroxypropyl methyl selulose (Hydroxypropyl methyl selulose, HPM). muribyo HPMC na HEMC nibisanzwe bikoreshwa.

Kubyimba ningaruka zingenzi zo guhindura selile ether kubikoresho bishingiye kuri sima. Ether ya selile irashobora guha minisiteri itose hamwe nubwiza buhebuje, ikongerera cyane ubushobozi bwo guhuza hagati ya minisiteri itose hamwe nigitereko fatizo, kandi igateza imbere imikorere ya anti-sag ya minisiteri. Irashobora kandi kongera ubushobozi bwa homogeneity hamwe no kurwanya-gukwirakwiza ibikoresho bishya bivanze na sima, kandi bikarinda gusenya, gutandukanya no kuva amaraso ya minisiteri na beto.

Ingaruka yibyibushye ya selulose ether kubikoresho bishingiye kuri sima birashobora gusuzumwa muburyo bwa rheologiya yibikoresho bishingiye kuri sima. Ibikoresho bishingiye kuri sima mubisanzwe bifatwa nkamazi ya Bingham, ni ukuvuga, iyo imishino yimyenda ikoreshwa r itari munsi yumusaruro r0, ibikoresho biguma mumiterere yabyo kandi ntibitemba; iyo impagarara zogosha r zirenze umusaruro wumusaruro r0, ikintu kigenda gihindagurika, kandi impagarara zogosha Imyitwarire r ifite umurongo ugereranije nigipimo cyingutu y, ni ukuvuga r = r0 + f·y, aho f ni ubwiza bwa plastike. Ether ya selulose muri rusange yongera umusaruro mwinshi hamwe nubusembwa bwa plastike bwibikoresho bishingiye kuri sima, nyamara, ibipimo byo hasi biganisha ku musaruro muke no kwangirika kwa plastike, ahanini biterwa ningaruka ziterwa na selile ya selile. Ubushakashatsi bwa Patural bwerekana ko uburemere bwa molekuline ya selile yiyongera, guhangayikishwa n'umusaruro wa simashitingi igabanuka, kandi guhuzagurika biriyongera.

Ubukonje bwa simashitingi ni indangagaciro yingenzi yo gusuzuma umubyimba wa selile ya ether ku bikoresho bishingiye kuri sima. Ubuvanganzo bumwe na bumwe bwakoze ubushakashatsi ku itegeko ryo guhindura ibishishwa bya selulose ether, ariko haracyabura ubushakashatsi bufatika ku ngaruka za selile ya ether ku ihinduka ry’imitsi ya sima.shitingi. Mugihe kimwe, ukurikije ubwoko butandukanye bwinsimburangingo, hariho ubwoko bwinshi bwa selile. Ingaruka zubwoko butandukanye hamwe nubwiza bwa selile ya etulire kumihindagurikire ya simashitingi viscosity nacyo nikibazo gihangayikishije cyane mugukoresha ethers ya selile. Aka kazi gakoresha viscometer yizenguruka kugirango yige ihinduka ryubwiza bwa selulose ether yahinduwe ya sima ya sima yubwoko butandukanye hamwe nubusembwa munsi ya poli-ivu itandukanye, umuvuduko wo kuzenguruka nubushyuhe.

1. Ubushakashatsi

1.1 Ibikoresho bibisi

(1) Cellulose ether. Ubwoko butandatu bwa selile ya selile ikunze gukoreshwa mugihugu cyanjye hatoranijwe, harimo ubwoko 1 bwa MC, ubwoko 1 bwa HEC, ubwoko 2 bwa HPMC nubwoko 2 bwa HEMC, muribwo ubwiza bwubwoko 2 bwa HPMC nubwoko 2 bwa HEMC biragaragara bitandukanye. Ubukonje bwa ether ya selile yapimwe na NDJ-1B izenguruka viscometer (Sosiyete ya Shanghai Changji Company), igisubizo cyibisubizo cyari 1.0% cyangwa 2.0%, ubushyuhe bwari 20°C, kandi umuvuduko wo kuzunguruka wari 12r / min.

(2) Isima. Isima isanzwe ya Portland yakozwe na Wuhan Huaxin Cement Co., Ltd ifite ibisobanuro bya P.·O 42.5 (GB 175-2007).

1.2 Uburyo bwo gupima Viscosity uburyo bwa selile ether igisubizo

Fata selulose ether sample yubuziranenge bwihariye hanyuma uyongere kuri 250mL yikirahure, hanyuma ongeramo 250g yamazi ashyushye kuri 90°C; koga neza ukoresheje inkoni yikirahure kugirango ether ya selulose ikore sisitemu imwe yo gukwirakwiza mumazi ashyushye, kandi icyarimwe shyira inzoga Cool mukirere. Mugihe igisubizo gitangiye kubyara viscosity kandi ntikizongera kugwa, hagarika guhita; mugihe igisubizo gikonje mukirere kugeza ibara risa, shyira inzoga mubwogero bwamazi burigihe, kandi ugumane ubushyuhe mubushyuhe bwagenwe. Ikosa ni± 0.1°C; nyuma ya 2h (ubarwa uhereye igihe cyo guhura na selulose ether n'amazi ashyushye), bapima ubushyuhe bwikigo hagati yumuti hamwe na termometero. Umusaruro) rotor yinjijwe mubisubizo byubujyakuzimu bwerekanwe, nyuma yo guhagarara 5min, bapima ubwiza bwayo.

1.3 Ibipimo bya Viscosity ya selulose ether yahinduwe simashitingi

Mbere yubushakashatsi, bika ibikoresho byose bibisi kubushyuhe bwagenwe, bapime ubwinshi bwa selile ya ether na sima, ubivange neza, hanyuma ushyiremo amazi ya robine mubushyuhe bwagenwe mumashanyarazi ya 250mL yikirahure hamwe na sima ya 0,65; hanyuma ongeramo ifu yumye muri beaker hanyuma utegereze iminota 3 Kangura neza ukoresheje inkoni yikirahure inshuro 300, shyiramo rotor ya viscometer izunguruka (ubwoko bwa NDJ-1B, bwakozwe na Shanghai Changji Geological Instrument Co., Ltd.) muri igisubizo cyimbitse, kandi upime viscosity yayo nyuma yo guhagarara kuminota 2. Mu rwego rwo kwirinda ingaruka ziterwa nubushyuhe bwa sima ku kizamini cya viscosity cya simashitingi ibishoboka byose, viscosity ya selulose ether yahinduwe simashitingi bigomba kugeragezwa mugihe sima ihuye namazi muminota 5.

2. Ibisubizo nisesengura

2.1 Ingaruka yibigize selile

Ingano ya selile ya ether hano yerekana igipimo rusange cya selile ya ether na sima, ni ukuvuga igipimo cya polyash. Biturutse ku ngaruka za P2, E2 na H1 ubwoko butatu bwa selile ya selile ku ihinduka ryijimye rya simashitingi kuri dosiye zitandukanye (0.1%, 0.3%, 0,6% na 0,9%), birashobora kugaragara ko nyuma yo kongeramo selile ether, ubwiza bwa simashitingi Ubushuhe buriyongera; uko ingano ya selile yiyongera, ubwiza bwa simashitingi yiyongera ubudahwema, kandi intera yo kwiyongera kwijimye rya simashitingi nayo iba nini.

Iyo igipimo cyamazi-sima ari 0,65 naho selile ya ether ya selile iba 0,6%, urebye amazi yakoreshejwe nogutangira kwambere kwa sima, kwibumbira hamwe kwa selile ya selile ugereranije namazi ni 1%. Iyo kwibumbira hamwe ari 1%, P2, E2 na H1 ibisubizo byamazi Amazi ya viscosities ni 4990mPa·S, 5070mPa·S na 5250mPa·s; iyo igipimo cyamazi-sima ari 0,65, ubwiza bwa sima nzizashitingi ni 836 mPa·S. Ariko, ibishishwa bya P2, E2 na H1 bitatu bya selile ether yahinduwe ya sima ni 13800mPa·S, 12900mPa·S na 12700mPa·s. Biragaragara, ubwiza bwa selile ether yahinduwe simashitingi ntabwo ari viscosity ya selulose ether igisubizo na Byoroheje byongeweho ubwiza bwa sima nzizashitingi ni nini cyane kuruta igiteranyo cyibintu bibiri, ni ukuvuga ubwiza bwumuti wa selulose ether hamwe nubwiza bwa simashitingi gira "ingaruka zo guhuza ibintu". Ubukonje bwumuti wa selulose ether buturuka kuri hydrophilique ikomeye yitsinda rya hydroxyl hamwe na ether ihuza muri molekile ya selile ya selile hamwe nuburyo butatu bwimikorere y'urusobe rwakozwe na molekile ya selile ya selile mubisubizo; ubwiza bwa sima nzizashitingi biva murusobe rwakozwe hagati yimikorere ya sima hydrata. Kubera ko ibicuruzwa bya polymer na sima bikunze gukora imiyoboro ihuza imiyoboro, muri selile ya ether yahinduwe simashitingiImiterere y'urusobekerane rw'ibice bitatu bya selulose ether hamwe nurusobe rw'urusobe rw'ibicuruzwa bitanga amazi ya sima birahujwe, kandi molekile ya selile ether ya Adsorption hamwe nibicuruzwa biva mu sima hamwe bitanga "compte superposition effet", ibyo bikaba byongera cyane ubwiza rusange muri sima.shitingi; kubera ko molekile imwe ya selulose ishobora guhuza hamwe na molekile nyinshi ya selile ya ether hamwe nibicuruzwa bitanga amazi ya sima, Kubwibyo, hamwe no kwiyongera kwa selile ya ether, ubwinshi bwimiterere y'urusobe bwiyongera cyane kuruta kwiyongera kwa molekile ya selile, hamwe n'ubukonje bwa sima.shitingi kwiyongera ubudahwema; hiyongereyeho, hydratiya yihuse ya sima ikeneye gufata igice cyamazi. , bihwanye no kongera ubukana bwa selile ether, nayo ikaba ari impamvu yo kwiyongera gukabije kwijimye rya simashitingi.

Kuva selile ya ether na simashitingi Kugira "compte superposition effet" muburyo bwo kwiyegereza, munsi ya selile imwe ya ether hamwe nibipimo byamazi-sima, ubwiza bwa selulose ether yahinduwe simashitingi hamwe nibitandukaniro bigaragara mugihe kwibandaho ari 2% Itandukaniro rya viscosity ntabwo rinini, kurugero, viscosities za P2 na E2 ni 48000mPa·s na 36700mPa·s muburyo bukemura ikibazo cyamazi hamwe na concentration ya 2%. S, itandukaniro ntabwo rigaragara; ibishishwa bya E1 na E2 mubisubizo byamazi 2% ni 12300mPa·S na 36700mPa·s, itandukaniro ni rinini cyane, ariko viscosities za paste ya sima yahinduwe ni 9800mPa·S na 12900mPa·S, itandukaniro ryaragabanutse cyane, mugihe rero uhisemo selile ya ether muri injeniyeri, ntabwo ari ngombwa gukurikirana selile nyinshi cyane ya selile. Byongeye kandi, mubikorwa byubwubatsi bifatika, kwibumbira muri selile ya selile ugereranije namazi mubisanzwe ni bike. Kurugero, mumashanyarazi asanzwe yo guhomeka, igipimo cyamazi-sima mubusanzwe kigera kuri 0,65, naho ibirimo selile ya selile ni 0.2% kugeza 0,6%. Ubwinshi bw'amazi buri hagati ya 0.3% na 1%.

Birashobora kandi kugaragara mubisubizo byikizamini ko ubwoko butandukanye bwa selile ya selile igira ingaruka zitandukanye kumyumvire ya simashitingi. Iyo kwibumbira hamwe ari 1%, viscosities za P2, E2 na H1 ubwoko butatu bwa selulose ether ibisubizo byamazi ni 4990mPa·s, 5070mPa·S na 5250mPa·S.·S, 12900mPa·S na 12700mPa·S ikurikiranye, kandi ubwiza bwa H1 bwahinduwe bwa sima bwaribwo bwari hasi cyane. Ni ukubera ko ethers ya selile isanzwe igira ingaruka zo gutinza amazi ya sima. Mu bwoko butatu bwa selile ya selile, HEC, HPMC na HEMC, HEC ifite ubushobozi bukomeye bwo gutinza amazi ya sima. Kubwibyo, muri sima ya H1 yahinduweshitingi, kubera umuvuduko wa sima gahoro, imiterere y'urusobe rw'ibicuruzwa bitanga sima bitera imbere gahoro, kandi ibishishwa ni bike.

2.2 Ingaruka yikigereranyo

Uhereye ku ngaruka zo kuzunguruka umuvuduko wa viscometer ku bwiza bwa sima nzizashitingi na selulose ether yahinduwe simashitingi, birashobora kugaragara ko uko umuvuduko wo kuzunguruka wiyongera, ubwiza bwa selile ether yahinduwe simashitingi na sima nzizashitingi igabanuka kurwego rutandukanye, ni ukuvuga, bose bafite umutungo wo kogosha kandi ni ibya pseudoplastique. Igipimo gito cyo kuzunguruka, niko kugabanuka kwijimye rya sima yoseshitingi hamwe nigipimo cyo kuzunguruka, ni ukuvuga, biragaragara cyane pseudoplastique ya simashitingi. Hamwe no kwiyongera kw'igipimo cyo kuzunguruka, umurongo wo kugabanuka kwa simashitingi buhoro buhoro biba byiza, kandi pseudoplastique igabanuka. Ugereranije na sima nzizashitingi, pseudoplastique ya selulose ether yahinduwe simashitingi ni ntege nke, nukuvuga, kwinjiza selile ya selile bigabanya pseudoplastique ya simashitingi.

Uhereye ku ngaruka zo kuzunguruka ku bwiza bwa simashitingi munsi ya selile zitandukanye za ether na viscosities, birashobora kumenyekana ko simashitingi yahinduwe hamwe na selile zitandukanye za selile zifite imbaraga zitandukanye za pseudoplastique, kandi ntoya ya viscosity ya selulose ether, niko ubwiza bwa sima yahinduweshitingi. Biragaragara cyane pseudoplastique ya simashitingi ni; pseudoplastique ya sima yahinduweshitingi nta tandukaniro rigaragara hamwe nubwoko butandukanye bwa selile ethers hamwe na viscosities. Kuva kuri P2, E2 na H1 ubwoko butatu bwa selile ether yahinduwe simashitingi muri dosiye zitandukanye (0.1%, 0.3%, 0,6% na 0.9%), ingaruka zumuvuduko wo kuzunguruka kumitsi irashobora kumenyekana, P2, E2 na H1 ubwoko butatu bwa fibre Amashanyarazi ya sima yahinduwe hamwe na ether isanzwe afite ibisubizo bimwe byikizamini : iyo ingano ya selile ether itandukanye, pseudoplastique yabo iratandukanye. Umubare muto wa selulose ether, niko imbaraga za pseudoplastique ya sima yahinduweshitingi.

Nyuma ya sima imaze guhura namazi, uduce twa sima hejuru yubutaka bwihuta, kandi ibicuruzwa biva mumazi (cyane cyane gel ya CSH) bigize imiterere ya agglomeration. Iyo hari icyerekezo cyogosha cyogukemura, igisubizo cya agglomeration kizakingurwa, kuburyo ku cyerekezo cyingufu zogosha Icyerekezo cyo kugabanuka cyerekezo kigabanuka, bityo bikerekana umutungo wogosha. Cellulose ether ni ubwoko bwa macromolecule ifite imiterere idasanzwe. Iyo igisubizo kikiriho, molekile ya selile ya selile irashobora kugira icyerekezo gitandukanye. Iyo hari icyerekezo cyogosha imbaraga mugisubizo, urunigi rurerure rwa molekile ruzahindukira rujyane. Icyerekezo cyingufu zogosha ziragabanuka, bigatuma kugabanuka kwurugendo rwimigezi, kandi binagaragaza umutungo wogosha. Ugereranije n'ibicuruzwa bitanga amazi ya sima, molekile ya selulose ether iroroshye guhinduka kandi ifite ubushobozi bwo gukwirakwiza imbaraga zo gukata. Kubwibyo, ugereranije na sima nzizashitingi, pseudoplastique ya selulose ether yahinduwe simashitingi ni ntege nke, kandi, nkuko viscosity cyangwa ibikubiye muri selile ya selile yiyongera, ingaruka ziterwa na molekile ya selile ya selile kuri shear imbaraga ziragaragara cyane. Plastike iba intege nke.

2.3 Ingaruka yubushyuhe

Biturutse ku ngaruka z'ubushyuhe (20°C, 27°C na 35°C) kuri viscosity ya selulose ether yahinduwe simashitingi, birashobora kugaragara ko mugihe ibiri muri selile ya selile ari 0,6%, nkuko ubushyuhe bwiyongera, sima nzizashitingi na M1 Ubukonje bwa sima yahinduweshitingi yiyongereye, hamwe nubwiza bwizindi selulose ether yahinduwe simashitingi yagabanutse, ariko kugabanuka ntibyari binini, kandi ubwiza bwa sima ya H1 yahinduweshitingi yagabanutse cyane. Kugeza kuri E2 yahinduwe simashitingi bireba, iyo igipimo cya polyash ari 0,6%, ubwiza bwa simashitingi igabanuka hamwe no kwiyongera kwubushyuhe, kandi iyo igipimo cya polyash ari 0.3%, ubwiza bwa simashitingi yiyongera hamwe no kwiyongera k'ubushyuhe.

Muri rusange, bitewe no kugabanuka kwingufu zikorana hagati yimitsi, ubwiza bwamazi azagabanuka hamwe no kwiyongera kwubushyuhe, niko bigenda kumuti wa selile. Nyamara, uko ubushyuhe buzamuka, nigihe cyo guhura hagati ya sima namazi kikiyongera, umuvuduko woguhindura sima uzihuta cyane, kandi urwego rwamazi ruziyongera, bityo ubwiza bwa sima nziza.shitingi uziyongera.

Muri selulose ether yahinduwe simashitingi, selile ya selile izashyirwa hejuru yibicuruzwa bitanga amazi ya sima, bityo bikabuza amazi ya sima, ariko ubwoko butandukanye nubwinshi bwa ether ya selile ifite ubushobozi butandukanye bwo kubuza amazi ya sima, MC (nka M1) ifite ubushobozi buke bwo kubuza amazi ya sima, kandi uko ubushyuhe bwiyongera, igipimo cya hydration ya simashitingi iracyarihuta, nkuko ubushyuhe bwiyongera, ubukonje Bwiyongera muri rusange; HEC, HPMC na HEMC birashobora kubuza cyane amazi ya sima, uko ubushyuhe bwiyongera, umuvuduko wa simashitingi ni buhoro, bityo uko ubushyuhe bwiyongera, HEC, HPMC na HEMC yahinduye sima Ubukonje bwashitingi .°C, 27°C na 35°C) Ubukonje bwa H1 yahinduwe simashitingi yagabanutse cyane hamwe no kwiyongera k'ubushyuhe. Nyamara, hydrata ya sima iracyahari mugihe ubushyuhe buri hejuru, kuburyo urwego rwo kugabanya selile ether yahinduwe simashitingi hamwe no kwiyongera k'ubushyuhe ntabwo bigaragara. Kugeza kuri E2 yahinduwe simashitingi bireba, iyo igipimo kiri hejuru (igipimo cyivu ni 0,6%), ingaruka zo guhagarika hydrata ya sima iragaragara, kandi ubukonje bugabanuka hamwe no kwiyongera kwubushyuhe; iyo igipimo kiri hasi (igipimo cyivu ni 0.3%)), ingaruka zo guhagarika hydrata ya sima ntizigaragara, kandi ubukonje bwiyongera hamwe no kwiyongera kwubushyuhe.

3. Umwanzuro

.shitingi komeza kwiyongera. Imiterere y'urusobe rwa molekulire ya selile ya ether hamwe nuburyo bwurusobe rwibicuruzwa biva muri sima birahujwe, kandi hydrata ya mbere ya sima yongerera mu buryo butaziguye kwibumbira hamwe kwa selile, bityo ubwiza bwumuti wa selile na sima.shitingi ifite "compte superposition effet", ni ukuvuga selile ether Ubukonje bwa sima yahinduweshitingi ni byinshi cyane kuruta igiteranyo cyimiterere yabyo. Ugereranije na HPMC na HEMC byahinduwe na sima, HEC yahinduwe ya sima ya sima ifite agaciro kizamini cyo kwipimisha munsi kubera iterambere ryihuta.

(2) Byombi selulose ether yahinduwe simashitingi na sima nzizashitingi kugira imitungo yogosha cyangwa pseudoplastique; pseudoplastique ya selulose ether yahinduwe simashitingi ni munsi yubwa sima nzizashitingi; munsi igipimo cyo kuzenguruka, cyangwa selile Yagabanutse ubwiza bwa ether-yahinduwe na simashitingi, cyangwa munsi yibiri muri selile ya ether, biragaragara cyane pseudoplastique ya selulose ether-yahinduwe simashitingi.

(3) Mugihe ubushyuhe bukomeje kwiyongera, umuvuduko nintera ya hydrata ya sima byiyongera, kuburyo ubwiza bwa sima nzizashitingi buhoro buhoro. Bitewe nubwoko butandukanye nubunini bwa selile ya selile ifite ubushobozi butandukanye bwo kubuza amazi ya sima, ubwiza bwa paste ya sima yahinduwe buratandukana nubushyuhe.