Synthesis thiab cov khoom ntawm Dej-soluble cellulose ether superplasticizer

Tsis tas li ntawd, paj rwb cellulose tau npaj rau qib Ling-off degree ntawm polymerization thiab tau hnov ​​​​mob nrog sodium hydroxide, 1,4 monobutylsulfonolate (1,4, butanesultone). sulfobutylated cellulose ether (SBC) tau txais cov dej zoo solubility. Cov teebmeem ntawm cov tshuaj tiv thaiv kub, cov tshuaj tiv thaiv lub sijhawm thiab cov khoom siv raw ntawm butyl sulfonate cellulose ether tau kawm. Qhov kev pom zoo ntawm cov tshuaj tiv thaiv tau txais, thiab cov qauv ntawm cov khoom yog tus cwj pwm los ntawm FTIR. Los ntawm kev kawm txog cov txiaj ntsig ntawm SBC ntawm cov khoom ntawm cov cement paste thiab mortar, nws pom tias cov khoom muaj cov dej zoo sib xws rau cov tshuaj naphthalene series dej txo tus neeg sawv cev, thiab cov dej tuav tau zoo dua li naphthalene series.dej txo tus neeg sawv cev. SBC nrog cov yam ntxwv sib txawv viscosity thiab sulfur cov ntsiab lus muaj qhov sib txawv ntawm cov cuab yeej retarding rau cement paste. Yog li ntawd, SBC xav tias yuav dhau los ua tus neeg saib xyuas dej txo qis, rov qab ua kom cov dej txo cov neeg ua haujlwm siab, txawm tias cov dej txo cov neeg ua haujlwm siab. Nws cov khoom yog txiav txim siab los ntawm nws cov qauv molecular.

Cov lus tseem ceeb:cellulose; Equilibrium degree ntawm polymerization; Butyl sulfonate cellulose ether; Dej txo tus neeg sawv cev

Txoj kev loj hlob thiab kev siv cov pob zeb ua haujlwm siab yog zoo sib xws rau kev tshawb fawb thiab kev tsim cov pob zeb ua kom cov dej txo qis. Nws yog vim cov tsos ntawm cov dej-txo tus neeg sawv cev uas cov pob zeb ua kom muaj kev ua haujlwm siab, ua haujlwm zoo thiab txawm tias muaj zog. Tam sim no, muaj ntau yam hauv qab no cov dej txo cov neeg ua haujlwm tau siv dav: naphthalene series dej txo tus neeg sawv cev (SNF), sulfonated amine resin series dej txo tus neeg sawv cev (SMF), amino sulfonate series dej txo tus neeg sawv cev (ASP), hloov lignosulfonate. series dej txo tus neeg sawv cev (ML), thiab polycarboxylic acid series dej txo tus neeg sawv cev (PC), uas yog ntau dua hauv kev tshawb fawb tam sim no. Polycarboxylic acid superplasticizer muaj qhov zoo ntawm me me lub sij hawm poob, tsawg npaum li cas thiab siab fluidity ntawm pob zeb. Txawm li cas los xij, vim tus nqi siab, nws nyuaj rau nrov hauv Suav teb. Yog li ntawd, naphthalene superplasticizer tseem yog daim ntawv thov tseem ceeb hauv Suav teb. Feem ntau ntawm cov condensing dej-txo cov neeg ua hauj lwm siv formaldehyde thiab lwm yam volatile yam uas tsis tshua muaj txheeb ze molecular hnyav, uas tej zaum yuav ua rau ib puag ncig nyob rau hauv synthesis thiab siv txheej txheem.

Txoj kev loj hlob ntawm cov khoom sib xyaw ua ke hauv tsev thiab txawv teb chaws tau ntsib nrog cov khoom siv tshuaj tsis txaus, tus nqi nce thiab lwm yam teeb meem. Yuav ua li cas siv pheej yig thiab ntau cov khoom siv txuas ntxiv dua tshiab los ua cov khoom siv los tsim cov kev ua tau zoo tshiab cov pob zeb sib xyaw ua ke yuav dhau los ua ib qho tseem ceeb ntawm kev tshawb fawb pob zeb ua ke. Cov hmoov txhuv nplej siab thiab cellulose yog cov neeg sawv cev tseem ceeb ntawm cov peev txheej no. Vim tias lawv cov khoom siv dav dav, rov ua dua tshiab, yooj yim rau kev hnov ​​​​mob nrog qee cov reagents, lawv cov derivatives tau siv dav hauv ntau qhov chaw. Tam sim no, kev tshawb fawb ntawm sulfonated starch li dej txo tus neeg sawv cev tau ua qee yam kev vam meej. Nyob rau hauv xyoo tas los no, kev tshawb fawb ntawm cov dej-soluble cellulose derivatives raws li cov dej-txo cov neeg ua hauj lwm kuj attracted tib neeg txoj kev xav. Liu Weizhe et al. siv paj rwb wool fiber ua raw khoom los ua ke cellulose sulfate nrog txawv tus txheeb ze molecular hnyav thiab degree ntawm kev hloov. Thaum nws cov degree ntawm kev hloov pauv nyob rau hauv qee qhov ntau, nws tuaj yeem txhim kho qhov fluidity ntawm cov cement slurry thiab lub zog ntawm cement consolidation lub cev. Cov patent hais tias qee cov polysaccharide derivatives los ntawm cov tshuaj tiv thaiv los qhia cov pab pawg muaj zog hydrophilic, tuaj yeem tau txais ntawm cov cement nrog cov dej-soluble polysaccharide derivatives, xws li sodium carboxymethyl cellulose, carboxymethyl hydroxyethyl cellulose, carboxymethyl sulfonate cellulose thiab lwm yam. Txawm li cas los xij, Knaus et al. pom tias CMHEC zoo li tsis haum rau kev siv los ua cov dej txo qis. Tsuas yog thaum sulfonic acid pawg tau nkag rau hauv CMC thiab CMHEC molecules, thiab nws cov txheeb ze molecular hnyav yog 1.0 × 105 ~ 1.5 × 105 g / mol, nws yuav muaj kev ua haujlwm ntawm cov pob zeb ua kom txo cov dej. Muaj cov kev xav sib txawv ntawm seb qee qhov dej-soluble cellulose derivatives yog tsim los siv los ua cov dej-txo cov neeg ua haujlwm, thiab muaj ntau hom dej-soluble cellulose derivatives, yog li nws yog ib qho tsim nyog los ua qhov tob thiab kev tshawb fawb txog kev sib txuas thiab kev siv cov cellulose derivatives tshiab.

Hauv daim ntawv no, paj rwb cellulose tau siv los ua cov khoom pib los npaj cov khoom sib npaug polymerization degree cellulose, thiab tom qab ntawd los ntawm sodium hydroxide alkalization, xaiv qhov tsim nyog cov tshuaj tiv thaiv kub, lub sij hawm tshuaj tiv thaiv thiab 1,4 monobutyl sulfonolactone cov tshuaj tiv thaiv, kev qhia txog sulfonic acid pawg ntawm cellulose. molecules, tau txais cov dej-soluble butyl sulfonic acid cellulose ether (SBC) qauv kev tshuaj xyuas thiab kev sim siv. Qhov muaj peev xwm ntawm kev siv nws ua tus neeg saib xyuas dej txo tau tham.

1. Kev sim

1.1 Cov khoom siv raw thiab cov cuab yeej siv

Absorbent paj rwb; Sodium hydroxide (analytical ntshiab); Hydrochloric acid (36% ~ 37% aqueous tov, analytically ntshiab); Isopropyl cawv (analytically ntshiab); 1,4 monobutyl sulfonolactone (qib kev lag luam, muab los ntawm Siping Fine Chemical Plant); 32.5R zoo tib yam Portland cement (Dalian Onoda Cement Factory); Naphthalene series superplasticizer (SNF, Dalian Sicca).

Spectrum One-B Fourier Transform infrared spectrometer, tsim los ntawm Perkin Elmer.

IRIS Advantage Inductively Coupled Plasma Emission Spectrometer (IcP-AEs), tsim los ntawm Thermo Jarrell Ash Co.

ZETAPLUS muaj peev xwm analyzer (Brookhaven Instruments, USA) tau siv los ntsuas lub peev xwm ntawm cov cement slurry tov nrog SBC.

1.2 Kev npaj ntawm SBC

Ua ntej, qhov sib npaug ntawm polymerization degree cellulose tau npaj raws li cov txheej txheem tau piav qhia hauv cov ntaub ntawv. Ib qho nyiaj ntawm cov paj rwb cellulose tau hnyav thiab ntxiv rau hauv peb txoj kev haus cawv. Nyob rau hauv kev tiv thaiv ntawm nitrogen, dilute hydrochloric acid nrog ib tug concentration ntawm 6% yog ntxiv, thiab cov sib tov yog nplawm heev. Tom qab ntawd nws raug tshem tawm nrog isopropyl cawv nyob rau hauv peb lub qhov ncauj hwj, alkalized rau ib lub sij hawm nrog 30% sodium hydroxide aqueous tov, hnyav ib tug npaum li cas ntawm 1,4 monobutyl sulfonolactone, thiab poob mus rau hauv peb lub qhov ncauj hwj, stirred ntawm lub tib lub sij hawm, thiab khaws cia qhov kub ntawm qhov kub thiab txias dej da dej ruaj khov. Tom qab cov tshuaj tiv thaiv rau ib lub sij hawm, cov khoom tau txias rau hauv chav tsev kub, precipitated nrog isopropyl cawv, pumped thiab lim, thiab cov khoom crude tau txais. Tom qab yaug nrog methanol aqueous tov rau ob peb zaug, pumped thiab lim, cov khoom yog thaum kawg nqus qhuav ntawm 60 ℃ rau siv.

1.3 SBC kev ntsuas kev ua tau zoo

Cov khoom SBC tau yaj hauv 0.1 mol / L NaNO3 aqueous tov, thiab viscosity ntawm txhua qhov dilution point ntawm cov qauv raug ntsuas los ntawm Ustner viscometer los xam nws cov yam ntxwv viscosity. Cov ntsiab lus sulfur ntawm cov khoom tau txiav txim los ntawm ICP - AES ntsuas. SBC cov qauv tau muab rho tawm los ntawm acetone, lub tshuab nqus tsev qhuav, thiab tom qab ntawd kwv yees li 5 mg cov qauv hauv av thiab nias ua ke nrog KBr rau cov qauv npaj. Infrared spectrum kuaj tau ua nyob rau hauv SBC thiab cellulose kuaj. Cement ncua kev kawm ntawv tau npaj nrog dej-cement piv ntawm 400 thiab dej txo tus neeg sawv cev cov ntsiab lus ntawm 1% ntawm cov cement loj. Nws lub peev xwm tau sim hauv 3 min.

Cement slurry fluidity thiab cement mortar dej txo tus nqi yog ntsuas raws li GB / T 8077-2000 "Test method for uniformity of concrete admixture", mw/me = 0.35. Kev teeb tsa lub sij hawm ntsuam xyuas ntawm cov cement paste yog ua raws li GB / T 1346-2001 "Test Method for Water Consumption, Teem Sijhawm thiab Stability of Cement Standard Consistency". Cement mortar compressive zog raws li GB / T 17671-1999 "cement mortar zog test Method (IS0 method)" txoj kev txiav txim.

2. Cov txiaj ntsig thiab kev sib tham

2.1 IR tsom xam ntawm SBC

Infrared spectra ntawm raw cellulose thiab khoom SBC. Vim tias qhov nqus siab tshaj plaws ntawm S - C thiab S - H yog qhov tsis muaj zog, nws tsis haum rau kev txheeb xyuas, thaum s = o muaj lub siab nqus siab. Yog li, qhov muaj nyob ntawm sulfonic acid pawg hauv cov qauv molecular tuaj yeem txiav txim siab los ntawm kev txiav txim siab qhov muaj nyob ntawm S = O ncov. Raws li infrared spectra ntawm raw cov ntaub ntawv cellulose thiab cov khoom SBC, nyob rau hauv cellulose spectra, muaj ib tug muaj zog nqus ncov nyob ze ntawm lub nthwv dej naj npawb 3350 cm-1, uas yog cais raws li lub hydroxyl stretching vibration ncov nyob rau hauv cellulose. Qhov siab tshaj qhov nqus dej ze ze ntawm yoj 2 900 cm-1 yog methylene (CH2 1) stretching vibration ncov. Ib tug series ntawm bands muaj xws li 1060, 1170, 1120 thiab 1010 cm-1 qhia txog lub stretching vibration absorption peaks ntawm hydroxyl pab pawg neeg thiab cov dabtsi yog khoov vibration absorption peaks ntawm ether daim ntawv cog lus (C — o — C). Tus naj npawb ntawm yoj ib ncig ntawm 1650 cm-1 qhia txog cov hydrogen daim ntawv cog lus nqus lub ncov tsim los ntawm pawg hydroxyl thiab dej dawb. Band 1440 ~ 1340 cm-1 qhia cov qauv crystalline ntawm cellulose. Hauv IR spectra ntawm SBC, qhov kev siv ntawm band 1440 ~ 1340 cm-1 tsis muaj zog. Lub zog ntawm qhov nqus siab tshaj plaws nyob ze 1650 cm-1 nce, qhia tias muaj peev xwm tsim cov ntawv cog lus hydrogen tau ntxiv dag zog. Muaj zog nqus peaks tshwm sim ntawm 1180,628 cm-1, uas tsis tau xav txog hauv infrared spectroscopy ntawm cellulose. Tus qub yog tus yam ntxwv nqus siab ncov ntawm s = o daim ntawv cog lus, thaum lub sij hawm tom kawg yog tus yam ntxwv absorption ncov ntawm s = o daim ntawv cog lus. Raws li kev soj ntsuam saum toj no, pawg sulfonic acid muaj nyob rau ntawm cov saw hlau molecular ntawm cellulose tom qab etherification cov tshuaj tiv thaiv.

2.2 Kev cuam tshuam ntawm cov tshuaj tiv thaiv ntawm SBC kev ua tau zoo

Nws tuaj yeem pom los ntawm kev sib raug zoo ntawm cov tshuaj tiv thaiv kab mob thiab cov khoom ntawm SBC tias qhov kub thiab txias, lub sij hawm tshuaj tiv thaiv thiab cov khoom sib piv cuam tshuam rau cov khoom ntawm cov khoom siv hluavtaws. Lub solubility ntawm SBC cov khoom yog txiav txim los ntawm lub sij hawm ntev uas yuav tsum tau rau 1g cov khoom kom tiav dissolve nyob rau hauv 100mL deionized dej ntawm chav tsev kub; Hauv kev ntsuas dej txo qis ntawm mortar, SBC cov ntsiab lus yog 1.0% ntawm cov cement loj. Tsis tas li ntawd, vim cellulose feem ntau yog tsim los ntawm anhydroglucose unit (AGU), tus nqi ntawm cellulose yog xam raws li AGU thaum lub reactant ratio yog xam. Piv nrog rau SBCl ~ SBC5, SBC6 muaj qis dua intrinsic viscosity thiab cov ntsiab lus sulfur ntau dua, thiab cov dej txo qis ntawm cov mortar yog 11.2%. Cov yam ntxwv viscosity ntawm SBC tuaj yeem cuam tshuam nws cov txheeb ze molecular loj. Cov yam ntxwv viscosity siab qhia tias nws cov txheeb ze molecular loj. Txawm li cas los xij, nyob rau lub sijhawm no, viscosity ntawm aqueous tov nrog tib lub concentration yuav inevitably nce, thiab dawb txav ntawm macromolecules yuav raug txwv, uas tsis haum rau nws adsorption ntawm cov cement hais, yog li cuam tshuam rau kev ua si ntawm dej. txo cov dispersion kev ua tau zoo ntawm SBC. Cov ntsiab lus sulfur ntawm SBC yog siab, qhia tias butyl sulfonate hloov pauv qib siab, SBC cov saw hlau molecular nqa ntau tus lej, thiab cov cement particles saum npoo muaj zog, yog li nws cov khoom tawg ntawm cov cement hais kuj muaj zog.

Hauv etherification ntawm cellulose, txhawm rau txhim kho qib etherification thiab cov khoom lag luam zoo, feem ntau siv cov txheej txheem ntawm ntau yam alkalization etherification. SBC7 thiab SBC8 yog cov khoom tau los ntawm kev rov ua dua alkalization etherification rau 1 thiab 2 zaug, feem. Pom tseeb, lawv cov yam ntxwv viscosity tsawg thiab cov ntsiab lus sulfur siab, qhov kawg dej solubility zoo, cov dej txo tus nqi ntawm cov cement mortar tuaj yeem ncav cuag 14.8% thiab 16.5%, feem. Yog li ntawd, hauv cov kev sim nram qab no, SBC6, SBC7 thiab SBC8 yog siv los ua cov khoom tshawb fawb los tham txog lawv cov teebmeem hauv cov cement paste thiab mortar.

2.3 Kev cuam tshuam ntawm SBC ntawm cov khoom cement

2.3.1 Kev cuam tshuam ntawm SBC ntawm fluidity ntawm cement paste

Kev cuam tshuam nkhaus ntawm cov dej txo tus neeg sawv cev cov ntsiab lus ntawm fluidity ntawm cement paste. SNF yog naphthalene series superplasticizer. Nws tuaj yeem pom los ntawm kev cuam tshuam ntawm cov ntsiab lus ntawm cov dej txo tus neeg sawv cev ntawm cov dej ntws ntawm cov cement paste, thaum cov ntsiab lus ntawm SBC8 tsawg dua 1.0%, fluidity ntawm cement paste maj mam nce nrog cov ntsiab lus nce, thiab cov nyhuv. zoo ib yam li SNF. Thaum cov ntsiab lus siab tshaj 1.0%, qhov kev loj hlob ntawm fluidity ntawm slurry maj mam qeeb, thiab nkhaus nkag mus rau hauv lub platform. Nws tuaj yeem suav hais tias cov ntsiab lus saturated ntawm SBC8 yog li 1.0%. SBC6 thiab SBC7 kuj muaj qhov zoo sib xws rau SBC8, tab sis lawv cov ntsiab lus saturation tau siab dua SBC8, thiab kev txhim kho qib ntawm cov dej slurry huv tsis siab li SBC8. Txawm li cas los xij, cov ntsiab lus saturated ntawm SNF yog li 0.7% ~ 0.8%. Thaum cov ntsiab lus ntawm SNF tseem nce ntxiv, qhov fluidity ntawm slurry tseem nce ntxiv, tab sis raws li lub nplhaib los ntshav, nws tuaj yeem txiav txim siab tias qhov nce ntawm lub sijhawm no yog ib feem los ntawm kev sib cais ntawm cov dej los ntawm cov cement slurry. Hauv kev xaus, txawm hais tias cov ntsiab lus saturated ntawm SBC siab dua li ntawm SNF, tseem tsis muaj qhov tshwm sim los ntshav tshwm sim thaum cov ntsiab lus ntawm SBC tshaj nws cov ntsiab lus saturated los ntawm ntau. Yog li, nws tuaj yeem txiav txim siab ua ntej tias SBC muaj cov txiaj ntsig ntawm kev txo cov dej thiab kuj muaj qee yam dej tuav, uas txawv ntawm SNF. Txoj haujlwm no yuav tsum tau kawm ntxiv.

Nws tuaj yeem pom los ntawm kev sib raug zoo ntawm cov kua nplaum ntawm cov cement paste nrog 1.0% dej-txo tus neeg saib xyuas cov ntsiab lus thiab lub sij hawm uas cov kua dej poob ntawm cov cement paste sib xyaw nrog SBC yog tsawg heev nyob rau hauv 120min, tshwj xeeb tshaj yog SBC6, nws thawj fluidity tsuas yog hais txog 200mm. , thiab qhov poob ntawm fluidity tsawg dua 20%. Lub warp poob ntawm slurry fluidity yog nyob rau hauv qhov kev txiav txim ntawm SNF> SBC8> SBC7> SBC6. Cov kev tshawb fawb tau pom tias naphthalene superplasticizer feem ntau yog absorbed rau saum npoo ntawm cov cement hais los ntawm lub dav hlau repulsive quab yuam. Nrog rau kev nce qib ntawm hydration, cov dej residual txo tus neeg sawv cev molecules hauv slurry yog txo, kom cov dej adsorbed txo tus neeg sawv cev molecules ntawm qhov chaw ntawm cov cement hais kuj maj mam txo. Lub repulsion ntawm cov khoom yog tsis muaj zog, thiab cov cement particles tsim lub cev condensation, uas qhia tau hais tias ib tug txo nyob rau hauv lub fluidity ntawm net slurry. Yog li ntawd, qhov poob ntawm cov cement slurry tov nrog naphthalene superplasticizer yog ntau dua. Txawm li cas los xij, feem ntau naphthalene series dej txo cov neeg ua haujlwm siv hauv engineering tau sib xyaw kom zoo los txhim kho qhov tsis zoo no. Yog li, nyob rau hauv cov nqe lus ntawm liquidity tuav, SBC yog superior rau SNF.

2.3.2 Kev cuam tshuam ntawm qhov muaj peev xwm thiab teeb tsa lub sijhawm ntawm cement paste

Tom qab ntxiv dej txo tus neeg sawv cev rau cov cement sib tov, cov cement particles adsorbed dej txo tus neeg sawv cev molecules, yog li cov khoom siv hluav taws xob muaj peev xwm ntawm cov cement hais tuaj yeem hloov pauv ntawm qhov zoo mus rau qhov tsis zoo, thiab tus nqi tiag tiag nce ntxiv. Tus nqi ntawm cov khoom muaj peev xwm ntawm cov cement tov nrog SNF yog siab dua li ntawm SBC. Nyob rau tib lub sijhawm, lub sijhawm teeb tsa ntawm cov cement paste sib xyaw nrog SBC tau txuas ntxiv mus rau qib sib txawv piv nrog cov qauv dawb, thiab lub sijhawm teeb tsa yog nyob rau hauv qhov kev txiav txim ntawm SBC6> SBC7> SBC8 los ntawm ntev mus rau luv. Nws tuaj yeem pom tau tias nrog kev txo qis ntawm SBC tus yam ntxwv viscosity thiab qhov nce ntawm cov ntsiab lus sulfur, lub sijhawm teem sijhawm ntawm cov cement paste yog maj mam luv. Qhov no yog vim hais tias SBC belongs rau polypolysaccharide derivatives, thiab muaj ntau hydroxyl pawg nyob rau hauv molecular saw, uas muaj ntau ntau yam ntawm retarding nyhuv ntawm cov hydration cov tshuaj tiv thaiv ntawm Portland cement. Muaj kwv yees li plaub yam ntawm tus neeg saib xyuas tus neeg sawv cev, thiab cov txheej txheem rov qab ntawm SBC yog kwv yees li hauv qab no: Hauv alkaline nruab nrab ntawm cov cement hydration, pawg hydroxyl thiab dawb Ca2 + daim ntawv tsis ruaj khov, kom cov concentration ntawm Ca2 10 nyob rau hauv cov kua theem. txo qis, tab sis kuj yuav adsorbed rau saum npoo ntawm cov cement hais thiab hydration cov khoom nyob rau saum npoo ntawm 02- los tsim hydrogen bonds, thiab lwm yam hydroxyl pawg thiab dej molecules los ntawm hydrogen daim ntawv cog lus koom haum, thiaj li hais tias lub nto ntawm cement hais ua ib txheej. ruaj khov solvated dej zaj duab xis. Yog li, cov txheej txheem hydration ntawm cement yog inhibited. Txawm li cas los xij, tus naj npawb ntawm cov pab pawg hydroxyl hauv cov saw hlau ntawm SBC nrog cov ntsiab lus sulfur sib txawv heev, yog li lawv cov kev cuam tshuam rau cov txheej txheem cement hydration yuav tsum sib txawv.

2.3.3 Kev ntsuas dej txo qis thiab ntsuas lub zog

Raws li kev ua tau zoo ntawm mortar tuaj yeem cuam tshuam qhov kev ua tau zoo ntawm pob zeb rau qee qhov, daim ntawv no tsuas yog kawm txog kev ua haujlwm ntawm mortar tov nrog SBC. Kev siv dej ntawm mortar tau hloov kho raws li tus qauv ntawm kev ntsuas cov dej txo tus nqi ntawm mortar, kom cov mortar nthuav dav mus txog (180 ± 5) hli, thiab 40 mm × 40 mlTl × 160 mill specimens tau npaj los kuaj cov compressive. lub zog ntawm txhua lub hnub nyoog. Piv nrog rau cov qauv dawb paug uas tsis muaj dej-txo tus neeg saib xyuas, lub zog ntawm mortar specimens nrog dej-txo tus neeg sawv cev hauv txhua lub hnub nyoog tau txhim kho nyob rau hauv ntau qib. Lub zog compressive ntawm cov qauv doped nrog 1.0% SNF nce 46%, 35% thiab 20% feem ntawm 3, 7 thiab 28 hnub. Lub zog ntawm SBC6, SBC7 thiab SBC8 ntawm lub zog compressive ntawm mortar tsis zoo ib yam. Lub zog ntawm mortar tov nrog SBC6 nce me ntsis ntawm txhua lub hnub nyoog, thiab lub zog ntawm mortar ntawm 3 d, 7 d thiab 28d nce 15%, 3% thiab 2% raws li. Lub zog compressive ntawm cov mortar tov nrog SBC8 tau nce siab heev, thiab nws lub zog ntawm 3, 7 thiab 28 hnub tau nce los ntawm 61%, 45% thiab 18%, feem, qhia tias SBC8 muaj zog txo cov dej thiab ntxiv dag zog rau cov cement mortar.

2.3.4 Kev cuam tshuam ntawm SBC molecular qauv khoom

Ua ke nrog cov kev soj ntsuam saum toj no ntawm kev cuam tshuam ntawm SBC ntawm cov cement paste thiab mortar, nws tsis yog qhov nyuaj rau pom tias cov qauv molecular ntawm SBC, xws li cov yam ntxwv viscosity (txog rau nws cov txheeb ze molecular hnyav, cov yam ntxwv viscosity yog siab, nws cov txheeb ze. Qhov hnyav molecular yog siab), cov ntsiab lus ntawm cov sulfur (txog rau qib ntawm kev hloov pauv ntawm cov pab pawg muaj zog hydrophilic ntawm cov saw hlau molecular, cov ntsiab lus sulfur siab yog qib siab ntawm kev hloov pauv, Thiab lwm yam) txiav txim siab txog kev ua haujlwm ntawm SBC. Thaum cov ntsiab lus ntawm SBC8 uas tsis tshua muaj viscosity thiab siab sulfur cov ntsiab lus yog tsawg, nws muaj peev xwm muaj zog dispersion muaj peev xwm rau cement hais, thiab cov ntsiab lus saturation kuj tsawg, txog 1.0%. Qhov txuas ntxiv ntawm lub sijhawm teeb tsa ntawm cement paste yog luv luv. Lub zog compressive ntawm mortar nrog tib fluidity nce pom tseeb ntawm txhua lub hnub nyoog. Txawm li cas los xij, SBC6 nrog cov viscosity siab hauv nruab nrab thiab cov ntsiab lus tsis muaj leej faj muaj cov fluidity me dua thaum nws cov ntsiab lus tsawg. Txawm li cas los xij, thaum nws cov ntsiab lus nce mus txog 1.5%, nws muaj peev xwm dispersion rau cement hais kuj tseem ceeb heev. Txawm li cas los xij, lub sijhawm teeb tsa ntawm cov ntshiab slurry yog ncua ntev dua, uas qhia tau hais tias cov yam ntxwv ntawm kev teeb tsa qeeb. Kev txhim kho ntawm mortar compressive zog nyob rau hauv txawv hnub nyoog yog txwv. Feem ntau, SBC zoo dua SNF hauv mortar fluidity tuav.

3. Cov lus xaus

1. Cellulose nrog balanced polymerization degree tau npaj los ntawm cellulose, uas yog etherized nrog 1,4 monobutyl sulfonolactone tom qab NaOH alkalization, thiab ces dej-soluble butyl sulfonolactone tau npaj. Cov tshuaj tiv thaiv zoo tshaj plaws ntawm cov khoom yog raws li hauv qab no: kab (Na0H); Los ntawm (AGU); n(BS) -2.5:1.0:1.7, tshuaj tiv thaiv lub sij hawm yog 4.5h, tshuaj tiv thaiv kub yog 75 ℃. Rov ua dua alkalization thiab etherification tuaj yeem txo cov yam ntxwv viscosity thiab nce cov ntsiab lus ntawm cov khoom sulfur.

2. SBC nrog cov yam ntxwv tsim nyog viscosity thiab sulfur cov ntsiab lus tuaj yeem txhim kho cov dej ntws ntawm cov cement slurry thiab txhim kho qhov poob ntawm fluidity. Thaum cov dej txo tus nqi ntawm mortar nce mus txog 16.5%, lub zog compressive ntawm mortar specimen ntawm txhua lub hnub nyoog nce pom tseeb.

3. Daim ntawv thov ntawm SBC raws li tus neeg sawv cev txo cov dej qhia tau hais tias muaj qee qhov kev ua kom tsis zoo. Raws li qhov tsim nyog tus yam ntxwv viscosity, nws muaj peev xwm kom tau txais kev ua haujlwm siab dej txo tus neeg sawv cev los ntawm kev nce cov ntsiab lus sulfur thiab txo qis qis. Kev xa mus rau cov qauv hauv tebchaws uas cuam tshuam txog kev sib xyaw ua ke, SBC xav tias yuav dhau los ua tus neeg saib xyuas dej nrog cov txiaj ntsig siv tau zoo, txo cov dej txo tus neeg sawv cev, rov ua kom cov dej txo cov neeg ua haujlwm siab, thiab txawm tias cov dej txo qis.