Saamaynta ether-ka cellulose ee kuleylka fuuq-celinta ee sibidhka kala duwan iyo hal macdanta

Saamaynta ether-ka cellulose-ka ee kulaylka fuuq-celinta ee sibidhka Portland, sibidhka sulfoaluminate, tricalcium silicate iyo tricalcium aluminate ee 72h ayaa la barbardhigay tijaabada calorimetry isothermal. Natiijooyinku waxay muujinayaan in ether-ka cellulose-ku uu si weyn u dhimi karo fuuq-celinta iyo heerkulka sii-deynta kulaylka ee sibidhka Portland iyo tricalcium silicate, iyo hoos u dhaca saameynta fuuq-celinta iyo heerkulka sii-deynta kulaylka tricalcium silicate waa mid aad u muhiim ah. Saamaynta ether-ka cellulose-ka ee hoos u dhigista heerka kulaylka sii-deynta ee fuuq-celinta sibidhka sulfoaluminate waa mid aad u daciif ah, laakiin waxay leedahay saameyn daciif ah oo lagu hagaajinayo heerka kuleylka kuleylka ee fuuq-celinta tricalcium aluminate. Ether-ka Cellulose waxa lagu milmi doona qaar ka mid ah badeecooyinka fuuq-baxa, sidaas awgeed dib u dhigista crystallization ee alaabta fuuqbaxa, ka dibna waxay saameeyaan heerka sii deynta kulaylka fuuq-baxa ee sibidhka iyo macdanta kelida ah.

Erayada muhiimka ah:ether cellulose; Sibidhka; Keliya macdanta; Kulaylka fuuq-baxa; adsorption

1. Hordhac

Eter cellulose waa wakiilka dhumuc muhiim ah iyo wakiilka biyaha haynta ee hoobiye isku qasan qalalan, shubka is-cusbooneysii iyo walxo kale oo cusub sibidh ku salaysan. Si kastaba ha ahaatee, ether cellulose waxay sidoo kale dib u dhigi doontaa fuuq-celinta sibidhka, taas oo ku habboon in la wanaajiyo wakhtiga hawlgalka ee alaabta sibidhka ku salaysan, hagaajinta joogteynta hoobiye iyo waqti lumis la taaban karo, laakiin sidoo kale waxay dib u dhigi kartaa horumarka dhismaha. Gaar ahaan, waxay saameyn xun ku yeelan doontaa hoobiye iyo shubka loo isticmaalo xaaladaha heerkulka hoose. Sidaa darteed, aad bay muhiim u tahay in la fahmo sharciga ether cellulose ee kinetics fuuq-celinta sibidhka.

OU iyo Pourchez waxay si nidaamsan u barteen saamaynta qiyaasaha molecular sida miisaanka molecular ee ether cellulose, nooca beddelka ama heerka beddelka ee kinetics fuuq-celinta sibidhka, waxayna soo saareen gunaanadyo badan oo muhiim ah: Awoodda hydroxyethyl cellulose ether (HEC) si dib loogu dhigo fuuq-celinta sibidhka inta badan wuu ka xoog badan yahay methyl cellulose ether (HPMC), hydroxymethyl ethyl cellulose ether (HEMC) iyo methyl cellulose ether (MC). Eter-ka cellulose-ka ee ka kooban methyl, hoos udhaca maadada methyl, ayaa sii xoogaysanaysa awoodda dib u dhigista fuuq-celinta sibidhka; Hoos u dhaca miisaanka kelli ee ether cellulose, ayaa sii xoogaysanaysa awoodda dib u dhigista fuuq-celinta sibidhka. Gabagabadani waxay bixiyaan saldhig cilmiyaysan oo lagu dooranayo ether cellulose si sax ah.

Qaybaha kala duwan ee sibidhka, saamaynta cellulose ether ee kinetics fuuq-celinta sibidhka ayaa sidoo kale ah dhibaato aad uga walaacsan codsiyada injineernimada. Si kastaba ha ahaatee, ma jirto cilmi-baaris ku saabsan arrintan. Warqadan, saameynta ether-ka cellulose ee kinetics-ka fuuq-celinta ee sibidhka Portland caadiga ah, C3S (tricalcium silicate), C3A (tricalcium aluminate) iyo sibidhka sulfoaluminate (SAC) ayaa lagu bartay iyada oo loo marayo tijaabada calorimetry isothermal, si loo sii fahmo isdhexgalka iyo habka gudaha ee u dhexeeya ether cellulose iyo alaabta fuuq-celinta sibidhka. Waxay bixisaa saldhig cilmiyaysan oo dheeri ah oo loogu talagalay isticmaalka macquulka ah ee ether-ka cellulose ee alaabta sibidhka ku salaysan iyo sidoo kale waxay bixisaa saldhig cilmi baaris oo ku saabsan isdhexgalka ka dhexeeya isku-darka kale iyo alaabta fuuq-celinta sibidhka.

2. Tijaabi

2.1 Qalabka Ceyriinka ah

(1) sibidhka Portland ee caadiga ah (P·0). Waxaa soo saaray Wuhan Huaxin Cement Co., LTD., qeexitaanku waa P · 042.5 (GB 175-2007), oo lagu go'aamiyay wavelength dispersion-nooca X-ray fluorescence spectrometer (AXIOS horumarsan, PANalytical Co., LTD.). Marka loo eego falanqaynta JADE 5.0 software, marka lagu daro macdanta clinker sibidhka C3S, C2s, C3A, C4AF iyo gypsum, alaabta ceeriin sidoo kale waxaa ku jira kaalshiyam carbonate.

(2) Sibidhka sulfoaluminate (SAC). Sibidhka sulfoaluminate ee degdega ah ee ay soo saarto Zhengzhou Wang Lou Cement Industry Co., Ltd. waa R.Star 42.5 (GB 20472-2006). Kooxaha ugu muhiimsan waa calcium sulfoaluminate iyo dicalcium silicate.

(3) tricalcium silicate (C3S). Riix Ca (OH) 2, SiO2, Co2O3 iyo H2O at 3: 1: 0.08: Saamiga baaxadda 10 ayaa si siman loo isku qasan yahay waxaana lagu riixay cadaadis joogto ah 60MPa si loo sameeyo billet cagaaran oo cylindrical ah. Billet waxaa lagu qasay at 1400 ℃ 1.5 ~ 2 h gudaha usha silikoon-molybdenum heerkulka sare ee foornada koronto, ka dibna u dhaqaaqay foornada microwave dheeraad ah kulaylka microwave 40min. Ka dib markii la soo saaray billet-ka, si lama filaan ah ayaa loo qaboojiyey oo si isdaba joog ah loo jebiyey oo la jarjaray ilaa ay ka kooban tahay CaO bilaashka ah ee alaabta la dhammeeyey ay ka yar tahay 1.0%

(4) tricalcium aluminate (c3A). CaO iyo A12O3 waa la isku qasan yahay si siman, oo lagu qiyaaso 1450 ℃ 4 saac oo foorno koronto ah oo silikoon-molybdenum ah, oo lagu shubay budo, oo si isdaba joog ah loo xisaabiyay ilaa ay ka kooban tahay CaO bilaash ah in ka yar 1.0%, iyo ugu sarreeya C12A7 iyo CA waxay ahaayeen la iska indhatiray.

(5) ether cellulose. Shaqadii hore waxay barbardhigtay saamaynta 16 nooc ee ethers cellulose ah oo ku saabsan fuuq-baxa iyo heerka sii deynta kulaylka ee sibidhka Portland ee caadiga ah, waxaana la ogaaday in noocyada kala duwan ee ethers-ka cellulose ay ku kala duwan yihiin sharciga fuuq-celinta iyo kulaylka sii deynta sibidhka, waxaana la falanqeeyay habka gudaha. farqiga weyn ee this. Marka loo eego natiijadii daraasaddii hore, saddex nooc oo ether cellulose ah oo saameyn muuqata ku leh sibidhka Portland ayaa la doortay. Kuwaas waxaa ka mid ah hydroxyethyl cellulose ether (HEC), hydroxypropyl methyl cellulose ether (HPMC), iyo hydroxyethyl methyl cellulose ether (HEMC). Viscosity ether-ka cellulose waxaa lagu cabiray viscometer rotary oo leh fiirsi tijaabo ah oo ah 2%, heerkul ah 20℃ iyo xawaare wareeg ah 12 r/min. Viscosity ether-ka cellulose waxaa lagu cabiray viscometer rotary oo leh fiirsi tijaabo ah oo ah 2%, heerkul ah 20℃ iyo xawaare wareeg ah 12 r/min. Darajada beddelka molarka ee etherka cellulose waxaa bixiya soo saaraha.

(6) Biyaha. Isticmaal biyo nadiif ah oo labaad.

2.2 Habka tijaabada

Kulaylka fuuqbaxa. TAM Air 8-channel isothermal calorimeter oo ay soo saartay Shirkadda Qalabka TA ayaa la qaatay. Dhammaan alaabta ceeriin waxaa lagu hayaa heerkul joogto ah si loo tijaabiyo heerkulka (sida (20± 0.5)℃) ka hor tijaabada Marka hore, 3 g sibidh iyo 18 mg budada ether cellulose ayaa lagu daray calorimeterka (saamiga tirada guud ee ether cellulose iyo walxaha cemellative wuxuu ahaa 0.6%). Isku darka buuxa ka dib, biyo isku dhafan (biyo labaad oo la nadiifiyey) ayaa lagu daray iyadoo loo eegayo saamiga biyaha-sibidhka ee la cayimay oo si siman loo walaaqay. Kadibna, si dhakhso ah ayaa loo geliyey kaloorimitirka si loo baadho. Saamiga biyaha-xidhaha ee c3A waa 1.1, saamiga biyaha-xidhaha ee saddexda shay ee kale ee sibidhka waa 0.45.

3. Natiijooyinka iyo doodaha

3.1 Natiijooyinka tijaabada

Saamaynta HEC, HPMC iyo HEMC ee heerka sii daynta kulaylka fuuq-baxa iyo heerka sii daynta kulaylka isugeynta ee sibidhka Portland ee caadiga ah, C3S iyo C3A gudaha 72 h, iyo saamaynta HEC ee heerka sii daynta kulaylka fuuqbaxa iyo isugeynta kulaylka sii deynta sibidhka sulfoaluminate 72 h gudahood, HEC waa ether-ka cellulose oo leh saameynta dib u dhigista ugu xoogan ee fuuq-celinta sibidhka kale iyo macdanta hal mar. Isku darka labada saameyn, waxaa la ogaan karaa in isbeddelka walxaha sibidhka, ether cellulose uu leeyahay saameyno kala duwan oo ku saabsan heerka sii deynta kulaylka fuuq-baxa iyo sii-deynta kulaylka isugeynta. Ether-ka cellulose-ka la doortay ayaa si weyn u yareyn kara fuuq-celinta iyo kulaylka sii-deynta ee sibidhka Portland ee caadiga ah iyo C, S, inta badan waxay kordhisaa muddada soo-saarka, waxay dib u dhigtaa muuqaalka fuuq-baxa iyo kulaylka sii deynta ugu sarreysa, oo ay ku jiraan ether cellulose ilaa C, fuuq-celinta S iyo Daahitaanka heerka kulaylka ayaa aad uga muuqda marka loo eego fuuq-celinta sibidhka Portland ee caadiga ah iyo daahitaanka heerka kulka; Ether Cellulose waxay sidoo kale dib u dhigi kartaa heerka sii deynta kulaylka ee fuuq-celinta sibidhka sulfoaluminate, laakiin awoodda daahitaanka ayaa aad u daciif ah, oo inta badan dib u dhigta fuuq-baxa 2 saacadood ka dib; Heerarka sii deynta kulaylka ee fuuq-celinta C3A, ether cellulose waxay leedahay awood dardargelineed oo daciif ah.

3.2 Falanqaynta iyo falanqaynta

Habka ether-ka cellulosic-ka ah ee dib u dhigista fuuq-celinta sibidhka. Silva iyo al. mala awaalay in ether-ka cellulosic-ku uu kordhiyey viscosity ee xalka daldaloolada oo uu xannibay heerka dhaqdhaqaaqa ionic, sidaas darteed dib u dhigista fuuq-celinta sibidhka. Si kastaba ha ahaatee, suugaan badan ayaa shaki galisay malo-awaalkan, maadaama ay tijaabooyinkoodu ogaadeen in ether-ka cellulose-ka ee maqaarkoodu hooseeyo ay awood xooggan u leeyihiin inay dib u dhigaan fuuq-celinta sibidhka. Dhab ahaantii, wakhtiga dhaqdhaqaaqa ion ama socdaalka waa mid aad u gaaban oo aan si cad loo barbar dhigi karin wakhtiga dib u dhigista fuuq-celinta sibidhka. Isku-darka u dhexeeya ether cellulose iyo alaabta fuuq-celinta sibidhka ayaa loo tixgeliyaa inay tahay sababta dhabta ah ee dib u dhigista fuuq-celinta sibidhka ee ether cellulose. Eter cellulose si fudud ayaa loogu dhejiyaa dusha sare ee alaabta fuuqbaxa sida calcium hydroxide, gel CSH iyo calcium aluminate hydrate, laakiin ma fududa in lagu dhejiyo ettringite iyo wajiga aan la nadiifin, iyo awoodda adsorption ee ether cellulose on calcium hydroxide ayaa ka sarreeya ee CSH gel. Sidaa darteed, alaabada fuuq-celinta sibidhka ee Portland ee caadiga ah, ether cellulose waxay leedahay dib-u-dhac xooggan oo ku saabsan calcium hydroxide, dib u dhigista ugu xooggan ee kalsiyumka, dib u dhigista labaad ee CSH gel, iyo dib u dhaca ugu liita ee ettringite.

Daraasado hore ayaa muujiyay in isku-darka u dhexeeya polysaccharide aan-ionic ahayn iyo marxaladda macdanta inta badan ay ka mid yihiin isku-xidhka hydrogen iyo isku-dhafka kiimikada, labadan saameynood waxay ka dhex dhacaan kooxda hydroxyl ee polysaccharide iyo birta hydroxide ee dusha macdanta. Liu iyo al. Waxa kale oo lagu sii kala saaray isku-darka u dhexeeya polysaccharides iyo biraha hydroxides sida isdhexgalka aashitada-saldhigga, iyadoo polysaccharides sida acids iyo hydroxides biraha saldhig ahaan. Wixii polysaccharide ah ee la bixiyay, alkalinity ee dusha macdanta ayaa go'aamiya xoogga isdhexgalka ka dhexeeya polysaccharides iyo macdanta. Waxa ka mid ah afarta qaybood ee gelling-ka ah ee lagu bartay warqaddan, biraha ugu muhiimsan ama kuwa aan birta ahayn waxaa ka mid ah Ca, Al iyo Si. Marka loo eego sida ay u kala horreeyaan hawlaha birta, alkalinity-ga hydroxide-koodu waa Ca (OH) 2> Al (OH3> Si (OH) 4. Dhab ahaantii, Si (OH) 4 xalku waa acidic oo aan soo saarin ether cellulose. Waxyaabaha ay ka kooban tahay Ca (OH) 2 ee dusha sare ee alaabta fuuq-celinta sibidhka ayaa go'aamisa awoodda xayeysiinta ee alaabta fuuq-celinta iyo ether cellulose iyo calcium aluminate hydrate (3CaO · Al2O3 · 6H2O) ee ka kooban oksaydhyada inorganic ee CaO waa 100%, 58.33%, 49.56% iyo 62 .2% Sidaa darteed, nidaamka ay awood adsorption la cellulose ether waa calcium hydroxide> calcium aluminate> CSH gel> ettringite, taas oo la socota natiijooyinka suugaanta.

Alaabooyinka fuuq-celinta ee c3S waxaa ka mid ah Ca (OH) iyo gel csH, iyo ether-ka cellulose waxay ku leedahay dib u dhac wanaagsan iyaga. Sidaa darteed, ether cellulose waxay leedahay dib u dhac aad u muuqda oo ku saabsan fuuq-celinta C3s. C3S ka sokow, sibidhka Portland ee caadiga ah waxa kale oo ka mid ah fuuq-celinta C2s oo gaabis ah, taas oo ka dhigaysa dib u dhaca ether-ka cellulose mid aan muuqan marxaladda hore. Alaabooyinka fuuq-celinta ee silicate caadiga ah ayaa sidoo kale waxaa ka mid ah ettringite, iyo saameynta daahitaanka etherka cellulose waa mid liidata. Sidaa darteed, awoodda dib u dhigista ether cellulose ee c3s way ka xoog badan tahay sibidhka Portland ee caadiga ah ee lagu arkay imtixaanka.

C3A si dhakhso ah ayey u milmi doontaa oo fuuqbaxeysaa marka ay la kulanto biyaha, iyo alaabada fuuqbaxa badanaa waa C2AH8 iyo c4AH13, kulaylka fuuq-baxa waa la sii deyn doonaa. Marka xalka C2AH8 iyo c4AH13 ay gaaraan saturation, crystallization of C2AH8 iyo C4AH13 hydrate xaashida hexagonal ayaa la samayn doonaa, iyo heerka falcelinta iyo kulaylka fuuqbaxa waa la dhimi doonaa isla waqti isku mid ah. Sababtoo ah xayeysiinta ether cellulose ee dusha sare ee calcium aluminate hydrate (CxAHy), joogitaanka ether cellulose waxay dib u dhigi doontaa crystallization ee C2AH8 iyo C4AH13 hexagonal-hydrate, taasoo keentay hoos u dhaca heerka falcelinta iyo fuuqbaxa heerkulka sii daayo ee C3A saafi ah, taas oo muujinaysa in ether-ka cellulose uu leeyahay awoodda dardargelinta daciifka ah ee fuuq-celinta C3A. Waxaa xusid mudan in tijaabadan, ether cellulose ay leedahay awood dardargelin daciif ah fuuq-celinta c3A saafi ah. Si kastaba ha ahaatee, sibidhka Portland ee caadiga ah, sababtoo ah c3A waxay ka falcelin doontaa gypsum si ay u sameyso ettringite, sababtoo ah saameynta ca2 + dheelitirka ee xalalka slurry, ether cellulose waxay dib u dhigi doontaa sameynta ettringite, sidaas darteed dib u dhigista fuuq-celinta c3A.

Laga soo bilaabo saamaynta HEC, HPMC iyo HEMC ee heerka fuuq-baxa iyo kulaylka sii deynta iyo kulaylka isugeynta ee sibidhka Portland ee caadiga ah, C3S iyo C3A gudaha 72 h, iyo saamaynta HEC ee heerka fuuqbaxa iyo kulaylka sii deynta iyo isugeynta kulaylka sii deynta sulfoaluminate sibidhka 72 h gudahood, waxaa la arki karaa in ka mid ah saddexda ethers cellulose ee la doortay, Awoodda fuuq-celinta ee c3s iyo sibidhka Portland ayaa ugu xooggan HEC, oo ay ku xigto HEMC, iyo ugu liidata HPMC. Ilaa hadda sida C3A ay khusayso, saddexda cellulose ethers 'awoodda ay u leeyihiin inay dardargeliyaan fuuq-baxa ayaa sidoo kale isku mid ah, taas oo ah, HEC waa kan ugu xooggan, HEMC waa kan labaad, HPMC waa kan ugu liita uguna xoogga badan. Tani waxay si wadajir ah u xaqiijisay in ether-ka cellulose ay dib u dhigtay samaynta wax soo saarka fuuq-celinta ee alaabta gelling.

Alaabta ugu muhiimsan ee fuuq-celinta ee sibidhka sulfoaluminate waa ettringite iyo Al (OH) 3 gel. C2S ee ku jira sibidhka sulfoaluminate ayaa sidoo kale si gooni ah u fuuqayn doona si ay u sameeyaan Ca (OH) 2 iyo cSH gel. Sababtoo ah xayeysiinta etherka cellulose iyo ettringite waa la iska indho tiri karaa, iyo fuuq-celinta sulfoaluminate waa mid aad u dhakhso badan, sidaas darteed, marxaladda hore ee fuuq-celinta, ether cellulose waxay leedahay saameyn yar oo ku saabsan heerka sii deynta kulaylka fuuq-baxa ee cement sulfoaluminate. Laakiin wakhti go'an oo fuuq-baxa ah, sababtoo ah c2s ayaa si gooni ah u fuuq-baxa si ay u abuuraan Ca (OH) 2 iyo CSH gel, labadan badeecadood ee fuuq-celinta waxaa dib u dhigi doona ether cellulose. Sidaa darteed, waxaa la arkay in ether cellulose ay dib u dhigtay fuuq-celinta sibidhka sulfoaluminate ka dib 2 saacadood.

4. Gabagabo

Warqadan, iyada oo loo marayo tijaabada calorimetry isothermal, sharciga saameynta iyo habka formation of cellulose ether ee kuleylka fuuq-celinta ee sibidhka Portland ee caadiga ah, c3s, c3A, sibidhka sulfoaluminate iyo qaybaha kale ee kala duwan iyo hal macdanta 72 h ayaa la barbardhigay. Gabagabada ugu muhiimsan waa sida soo socota:

(1) Eter cellulose waxay si weyn u dhimi kartaa heerka sii deynta kulaylka fuuq-baxa ee sibidhka Portland ee caadiga ah iyo tricalcium silicate, iyo saamaynta hoos u dhigista heerka sii daynta kulaylka fuuq-baxa tricalcium silicate waa mid aad u muhiim ah; Saamaynta ether-ka cellulose ee yaraynta heerka sii deynta kulaylka ee cement sulfoaluminate waa mid aad u daciif ah, laakiin waxay leedahay saameyn daciif ah oo lagu hagaajinayo heerka sii deynta kulaylka ee tricalcium aluminate.

(2) ether-ka cellulose-ka waxaa ku milmi doona qaar ka mid ah alaabooyinka fuuq-baxa, sidaas darteed dib u dhigista crystallization ee alaabta fuuqbaxa, saameynaysa heerka sii deynta kulaylka ee fuuq-celinta sibidhka. Nooca iyo tirada alaabooyinka fuuq-baxa waxay ku kala duwan yihiin qaybaha kala duwan ee biilka sibidhka, markaa saamaynta ether-ka cellulose ee kuleylkooda fuuqbaxa isku mid maaha.