Lub luag haujlwm ntawm hydroxypropyl starch ether hauv mortar

Lub WeChat pej xeem tus account tsis tu ncua thawb ntau cov ntsiab lus zoo xws li kev paub dhau los, cellulose raw khoom nqi, kev lag luam tiam sis, luv nqi, thiab lwm yam, thiab muab cov khoom tshaj lij ntawm putty hmoov, mortar thiab lwm yam khoom siv tshuaj raw khoom! Ua raws li peb!

Taw qhia rau Starch Ether

Cov hmoov txhuv nplej siab ntau thiab feem ntau siv yog qos yaj ywm starch, tapioca starch, pob kws starch, nplej hmoov nplej, thiab cereal starch nrog cov roj ntau dua thiab cov protein ntau. Hauv paus qoob loo starches xws li qos yaj ywm thiab tapioca starch yog ntau ntshiab.

Starch yog ib qho polysaccharide macromolecular compound uas muaj cov piam thaj. Muaj ob hom molecules, linear thiab branched, hu ua amylose (cov ntsiab lus 20%) thiab amylopectin (cov ntsiab lus txog 80%). Txhawm rau txhim kho kev siv cov hmoov txhuv nplej siab hauv cov khoom siv hauv tsev, nws tuaj yeem hloov kho los ntawm kev siv lub cev thiab tshuaj lom neeg los ua kom nws cov khoom tsim nyog rau cov kev xav tau ntawm cov khoom siv hauv tsev rau ntau lub hom phiaj. Hydroxypropyl hmoov txhuv nplej siab ether

Lub luag hauj lwm ntawm starch ether nyob rau hauv mortar

Rau qhov tam sim no sib txawv ntawm thaj tsam ntawm cov pobzeb, ntxiv cov hmoov txhuv nplej siab ether tuaj yeem txhim kho cov nplaum tiv thaiv ntawm cov nplais nplaum.

ncua sijhawm qhib

Rau cov nplais nplaum, nws tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm cov pobzeb tshwj xeeb nplaum (Class E, 20min txuas mus rau 30min kom ncav cuag 0.5MPa) uas txuas ntxiv lub sijhawm qhib.

Txhim kho cov khoom nto

Cov hmoov txhuv nplej siab ether tuaj yeem ua rau saum npoo ntawm gypsum puag thiab cement mortar smooth, yooj yim rau kev thov, thiab muaj cov nyhuv zoo nkauj. Nws yog ib qho tseem ceeb heev rau plastering mortar thiab nyias txheej zoo nkauj mortar xws li putty.

Mechanism ntawm kev ua ntawm starch ether

Thaum cov hmoov txhuv nplej siab ether dissolves hauv dej, nws yuav sib npaug sib npaug hauv cov cement mortar system. Txij li cov hmoov txhuv nplej siab ether molecule muaj cov qauv sib txuas thiab tsis zoo, nws yuav nqus tau cov khoom siv cement zoo thiab ua tus choj hloov mus txuas rau cov cement, yog li muab cov txiaj ntsig loj dua ntawm cov slurry tuaj yeem txhim kho kev tiv thaiv sag los yog tiv thaiv. cuam ​​tshuam.

Qhov sib txawv ntawm starch ether thiab cellulose ether

(1) Cov hmoov txhuv nplej siab ether tuaj yeem txhim kho qhov kev tiv thaiv sag thiab tiv thaiv kev ua haujlwm ntawm mortar, thaum cellulose ether feem ntau tsuas tuaj yeem txhim kho cov viscosity thiab dej tuav ntawm lub kaw lus tab sis tsis tuaj yeem txhim kho qhov kev tiv thaiv thiab tiv thaiv kev ua haujlwm.

(2) thickening thiab viscosity

Feem ntau, cov viscosity ntawm cellulose ether yog txog kaum tawm txhiab, thaum lub viscosity ntawm starch ether yog ob peb puas mus rau ob peb txhiab, tab sis qhov no tsis tau txhais hais tias cov khoom thickening ntawm starch ether rau mortar tsis zoo li cov cellulose ether, thiab lub thickening mechanism ntawm ob yog txawv.

(3) Piv nrog cellulose, hmoov txhuv nplej siab ether tuaj yeem ua rau muaj txiaj ntsig zoo ntawm cov pobzeb nplaum nplaum, yog li txhim kho cov kev ua haujlwm tsis zoo.

(4) Cua nkag

Cellulose ether muaj cov cuab yeej ua kom huab cua muaj zog, thaum cov hmoov txhuv nplej siab ether tsis muaj cua nkag mus.

(5) Cellulose ether molecular qauv

Txawm hais tias ob qho tib si hmoov txhuv nplej siab thiab cellulose yog tsim los ntawm cov piam thaj molecules, lawv txoj kev sib txawv yog txawv. Tag nrho cov piam thaj molecules nyob rau hauv cov hmoov txhuv nplej siab yog teem nyob rau hauv tib txoj kev, thaum cellulose yog qhov opposite. Txhua qhov nyob ib sab Kev taw qhia ntawm cov piam thaj molecules yog qhov sib txawv, thiab qhov sib txawv ntawm cov qauv no kuj txiav txim siab qhov txawv ntawm cov khoom ntawm cellulose thiab starch.

Xaus: Thaum cov cellulose ether thiab starch ether siv ua ke, muaj txiaj ntsig zoo tuaj yeem tshwm sim. Cov kev sim tau ua pov thawj tias kev siv cov hmoov txhuv nplej siab ether los hloov 20% -30% ntawm cellulose ether hauv mortar tsis tuaj yeem txo cov dej tuav lub peev xwm ntawm cov tshuaj khib nyiab, thiab tuaj yeem txhim kho lub peev xwm los tiv thaiv sag thiab tiv thaiv plam.