Hydroxyethyl Cellulose (HEC) yog non-ionic dej-soluble polymer compound uas nws cov qauv tshuaj yog hloov los ntawm cellulose los ntawm cov tshuaj tiv thaiv hydroxyethylation. HEC muaj cov dej zoo solubility, thickening, suspending, emulsifying, dispersing thiab film-forming zog, yog li nws yog dav siv nyob rau hauv lub tsev cov ntaub ntawv, coatings, tshuaj niaj hnub thiab zaub mov kev lag luam. Hauv cov tshuaj tsuag-coated ceev-teeb roj hmab asphalt waterproof txheej, kev taw qhia ntawm hydroxyethyl cellulose tuaj yeem txhim kho nws cov cua sov.
1. Cov khoom tseem ceeb ntawm hydroxyethyl cellulose
Hydroxyethylcellulose muaj peev xwm thickening thiab film-forming peev xwm nyob rau hauv dej, ua rau nws ib tug zoo tagnrho thickener rau ntau yam dej-raws li txheej. Nws ua rau kom cov viscosity ntawm cov xim los ntawm kev tsim hydrogen bonds nrog dej molecules, ua rau lub network ntawm dej molecules tighter. Cov cuab yeej no tseem ceeb tshwj xeeb hauv cov txheej txheem dej tsis muaj dej, vim tias cov viscosity siab pab cov txheej txheem tswj nws cov duab thiab tuab ua ntej kho, ua kom cov yeeb yaj kiab sib xws thiab txuas ntxiv.
2. Mechanism los txhim kho cov cua sov
2.1 Ua kom muaj kev ruaj ntseg ntawm cov txheej txheem
Lub xub ntiag ntawm hydroxyethyl cellulose tuaj yeem txhim kho thermal stability ntawm roj hmab asphalt txheej. Cov viscosity ntawm cov xim feem ntau txo qis thaum kub nce, thiab hydroxyethyl cellulose qeeb cov txheej txheem no thiab tswj cov xim ntawm lub cev. Qhov no yog vim hais tias pawg hydroxyethyl nyob rau hauv HEC molecule tuaj yeem tsim lub cev sib txuas sib txuas nrog lwm cov khoom hauv txheej txheej, uas txhim kho cov thermal stability ntawm txheej zaj duab xis thiab ua kom nws tswj tau cov qauv zoo thiab ua haujlwm nyob rau hauv qhov kub thiab txias.
2.2 Txhim kho cov cuab yeej cuab tam ntawm cov zaj duab xis txheej
Cov khoom siv ntawm cov yeeb yaj kiab txheej, xws li kev hloov pauv, lub zog tensile, thiab lwm yam, ncaj qha cuam tshuam rau nws qhov kev ua tau zoo nyob rau hauv qhov kub thiab txias. Kev taw qhia ntawm HEC tuaj yeem txhim kho cov khoom siv ntawm cov yeeb yaj kiab txheej, uas feem ntau yog vim nws cov nyhuv thickening uas ua rau cov txheej txheem txheej txheej denser. Cov txheej txheem ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom tsis tsuas yog txhim kho cov cua sov ua haujlwm, tab sis kuj tseem txhim kho lub peev xwm tiv thaiv lub cev kev ntxhov siab los ntawm sab nraud thermal expansion thiab contraction, tiv thaiv kev tawg lossis tev ntawm cov yeeb yaj kiab txheej.
2.3 Txhim kho qhov adhesion ntawm cov zaj duab xis txheej
Nyob rau hauv qhov kub thiab txias, cov txheej txheem dej tsis zoo yog qhov ua rau delamination lossis tev, uas yog vim tsis txaus adhesion ntawm substrate thiab txheej zaj duab xis. HEC tuaj yeem txhim kho qhov adhesion ntawm cov txheej rau lub substrate los ntawm kev txhim kho kev tsim kho kev ua haujlwm thiab cov yeeb yaj kiab tsim cov khoom ntawm txheej. Qhov no pab cov txheej txheem kom muaj kev sib raug zoo nrog lub substrate ntawm qhov kub thiab txias, txo qhov kev pheej hmoo ntawm tev lossis delamination.
3. Kev sim cov ntaub ntawv thiab cov ntaub ntawv siv tau
3.1 Kev sim tsim
Txhawm rau txhawm rau txheeb xyuas cov txiaj ntsig ntawm hydroxyethyl cellulose ntawm kev tiv thaiv tshav kub ntawm cov tshuaj tsuag sai-teeb roj hmab asphalt waterproof txheej, ib qho kev sim tuaj yeem tsim. Hauv kev sim, cov ntsiab lus sib txawv ntawm HEC tuaj yeem muab ntxiv rau cov txheej txheem dej tsis muaj dej, thiab tom qab ntawd cov thermal stability, mechanical zog thiab adhesion ntawm cov txheej tuaj yeem raug soj ntsuam los ntawm kev tshuaj ntsuam xyuas thermogravimetric (TGA), dynamic thermomechanical tsom xam (DMA) thiab tensile kuaj.
3.2 Cov txiaj ntsig kev sim
Cov txiaj ntsig kev sim qhia tau hais tias tom qab ntxiv HEC, qhov kub-tiv taus ntawm txheej txheej tau nce ntxiv. Nyob rau hauv pawg tswj tsis muaj HEC, txheej zaj duab xis pib decompose ntawm 150 ° C. Tom qab ntxiv HEC, qhov kub thiab txias uas cov zaj duab xis txheej tuaj yeem tiv taus kom siab tshaj 180 ° C. Tsis tas li ntawd, qhov kev taw qhia ntawm HEC tau nce lub zog tensile ntawm txheej zaj duab xis los ntawm kwv yees li 20%, thaum kev ntsuam xyuas tev pom tau tias qhov adhesion ntawm txheej rau lub substrate nce li ntawm 15%.
4. Kev siv engineering thiab kev ceev faj
4.1 Daim ntawv thov Engineering
Hauv kev siv tswv yim, kev siv hydroxyethyl cellulose tuaj yeem txhim kho kev tsim kho kev ua tau zoo thiab kev ua tau zoo kawg ntawm kev txau cov roj hmab asphalt waterproof txheej. Cov txheej txheem hloov kho no tuaj yeem siv rau hauv thaj chaw xws li kev tsim cov dej tsis zoo, kev tsim hluav taws xob hauv av, thiab cov kav dej tiv thaiv corrosion, thiab tshwj xeeb tshaj yog tsim rau cov dej tsis zoo hauv qhov chaw kub kub.
4.2 Kev ceev faj
Txawm hais tias HEC tuaj yeem txhim kho kev ua tau zoo ntawm cov txheej txheem, nws qhov ntau npaum li cas yuav tsum tau tswj kom tsim nyog. HEC ntau dhau tuaj yeem ua rau cov viscosity ntawm cov txheej txheem siab dhau, cuam tshuam rau kev tsim kho. Yog li ntawd, hauv cov qauv tsim qauv, qhov ntau npaum li cas ntawm HEC yuav tsum tau ua kom zoo dua los ntawm kev sim kom ua tiav cov txheej txheem zoo tshaj plaws thiab kev tsim kho.
Hydroxyethyl cellulose zoo txhim kho cov cua sov ua haujlwm ntawm cov tshuaj tsuag sai-teeb roj hmab asphalt waterproof txheej los ntawm kev ua kom cov viscosity ntawm txheej, txhim kho cov khoom siv ntawm cov yeeb yaj kiab txheej, thiab txhim kho cov adhesion ntawm txheej. Kev sim cov ntaub ntawv thiab cov ntaub ntawv siv tau qhia tias HEC muaj cov txiaj ntsig tseem ceeb hauv kev txhim kho thermal stability thiab kev ntseeg siab ntawm cov txheej txheem. Kev siv lub laj thawj ntawm HEC tuaj yeem tsis tsuas yog txhim kho kev tsim kho ntawm cov txheej txheem, tab sis kuj tseem txuas ntxiv kev pab cuam lub neej ntawm cov txheej txheem dej tsis zoo nyob rau hauv qhov chaw kub kub, muab cov tswv yim tshiab thiab cov txheej txheem rau kev tsim cov khoom siv hauv tsev.
Lub sij hawm xa tuaj: Plaub Hlis-08-2024