Hydroxypropyl hmoov txhuv nplej siab ether (HPS)thiabcellulose etheryog ob hom tshuaj siv hauv kev tsim kho, siv dav hauv cov ntaub ntawv siv hauv kev tsim kho, xws li mortar, putty hmoov, coatings, thiab lwm yam. Txawm hais tias lawv muaj qee yam zoo sib xws, muaj qhov sib txawv tseem ceeb hauv ntau yam xws li cov khoom siv raw, cov qauv tshuaj, cov khoom siv lub cev, cov teebmeem ntawm daim ntawv thov, thiab cov nqi.
1. Cov khoom siv raw thiab cov qauv tshuaj lom neeg
Hydroxypropyl hmoov txhuv nplej siab ether (HPS)
HPS yog ua los ntawm cov hmoov txhuv nplej siab ntuj thiab tau los ntawm kev hloov pauv etherification. Nws cov khoom siv tseem ceeb yog pob kws, nplej, qos yaj ywm thiab lwm yam nroj tsuag ntuj. Cov hmoov txhuv nplej siab molecules yog tsim los ntawm cov chav glucose txuas nrog α-1,4-glycosidic bonds thiab me me ntawm α-1,6-glycosidic bonds. Tom qab hydroxypropylation, ib pawg hydrophilic hydroxypropyl tau qhia rau hauv HPS molecular qauv, muab nws qee yam thickening, dej khaws cia thiab hloov pauv haujlwm.
cellulose ether
Cov cellulose ethers yog los ntawm cov cellulose ntuj, xws li paj rwb lossis ntoo. Cellulose yog tsim los ntawm cov chav glucose txuas nrog β-1,4-glycosidic bonds. Cov cellulose ethers feem ntau suav nrog hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), hydroxyethyl cellulose (HEC), thiab lwm yam. Cov tshuaj no qhia txog cov substituents sib txawv los ntawm kev sib xyaw etherification thiab muaj kev ruaj khov tshuaj lom neeg thiab cov khoom siv lub cev siab dua.
2. Cov khoom siv lub cev
Cov yam ntxwv ntawm kev ua tau zoo ntawm HPS
Thickening: HPS muaj cov nyhuv thickening zoo, tab sis piv nrog cellulose ether, nws lub peev xwm thickening yog me ntsis qaug zog.
Kev khaws dej: HPS muaj kev khaws dej nruab nrab thiab tsim nyog rau cov ntaub ntawv tsim kho qis mus rau nruab nrab.
Kev Ua Haujlwm Tau: HPS tuaj yeem txhim kho kev ua haujlwm tau ntawm cov mortar thiab txo qhov sagging thaum lub sijhawm tsim kho.
Kev tiv taus kub: HPS rhiab heev rau qhov kub thiab txias thiab cuam tshuam loj heev los ntawm qhov kub thiab txias ib puag ncig.
Cov yam ntxwv kev ua tau zoo ntawm cellulose ethers
Thickening: Cellulose ether muaj cov nyhuv thickening muaj zog thiab tuaj yeem ua rau kom cov viscosity ntawm mortar lossis putty ntau ntxiv.
Kev khaws dej: Cellulose ether muaj cov khoom khaws dej zoo heev, tshwj xeeb tshaj yog nyob rau hauv qhov chaw kub siab, uas tuaj yeem ntev lub sijhawm qhib ntawm cov mortar thiab tiv thaiv kev poob dej ntau dhau.
Kev Ua Haujlwm Tau: Cellulose ether zoo heev hauv kev txhim kho kev ua haujlwm tau zoo thiab tuaj yeem txo cov teeb meem xws li kev tawg thiab hmoov.
Kev tiv thaiv kub: Cellulose ether muaj kev hloov pauv zoo rau kev hloov pauv kub thiab kev ua haujlwm ruaj khov.
3. Cov teebmeem ntawm daim ntawv thov
Cov nyhuv ntawm daim ntawv thovHPS
Hauv cov pob zeb qhuav, HPS feem ntau ua lub luag haujlwm los txhim kho kev ua haujlwm tau zoo, txhim kho kev khaws dej, thiab txo qhov sib cais thiab kev sib cais. Nws pheej yig thiab tsim nyog rau kev siv rau hauv cov xwm txheej uas xav tau kev tswj tus nqi siab, xws li hmoov putty sab hauv phab ntsa, cov pob zeb hauv pem teb, thiab lwm yam.
Cov nyhuv ntawm daim ntawv thov ntawm cellulose ether
Cov cellulose etherssiv dav hauv cov mortars ua haujlwm siab, cov nplaum pobzeb, cov ntaub ntawv ua los ntawm gypsum thiab cov txheej txheem rwb thaiv tsev phab ntsa sab nraud. Nws cov khoom ua kom tuab thiab khaws dej zoo tuaj yeem txhim kho lub zog sib txuas thiab kev ua haujlwm tiv thaiv kev plam ntawm cov ntaub ntawv, thiab tshwj xeeb tshaj yog tsim rau cov haujlwm uas muaj kev xav tau siab ntawm kev ua haujlwm tsim kho thiab qhov zoo ntawm cov khoom tiav.
4. Tus nqi thiab kev tiv thaiv ib puag ncig
tus nqi:
HPS muaj tus nqi qis dua thiab tsim nyog siv rau hauv kev lag luam uas muaj kev cuam tshuam nrog tus nqi. Cellulose ethers kim heev, tab sis muaj kev ua tau zoo heev thiab tsim nyog tus nqi hauv cov haujlwm tsim kho uas xav tau ntau.
Kev tiv thaiv ib puag ncig:
Ob qho tib si yog los ntawm cov khoom siv ntuj thiab muaj cov khoom zoo rau ib puag ncig. Txawm li cas los xij, vim tias muaj tsawg dua cov tshuaj reagents siv rau hauv cov txheej txheem tsim khoom ntawm HPS, nws cov teeb meem ib puag ncig yuav qis dua.
5. Lub hauv paus xaiv
Cov kev cai ua tau zoo: Yog tias koj muaj cov kev xav tau siab rau cov khoom tuab thiab khaws dej, koj yuav tsum xaiv cellulose ether; rau cov ntaub ntawv uas muaj kev cuam tshuam nrog tus nqi tab sis xav tau qee qhov kev txhim kho hauv kev ua haujlwm, koj tuaj yeem xav txog kev siv HPS.
Cov xwm txheej siv: Kev tsim kho kub siab, kev rwb thaiv tsev phab ntsa sab nraud, cov nplais nplaum thiab lwm yam xwm txheej uas xav tau kev txhawb nqa siab yog qhov tsim nyog dua rau cellulose ether; rau cov phab ntsa sab hauv tsev lossis cov mortar yooj yim, HPS tuaj yeem muab cov kev daws teeb meem pheej yig thiab siv tau.
Hydroxypropyl hmoov txhuv nplej siab etherthiabcellulose ether Txhua tus muaj lawv tus kheej qhov zoo thiab lawv ua lub luag haujlwm sib txawv hauv cov ntaub ntawv tsim kho. Kev xaiv yuav tsum tau txiav txim siab kom meej raws li qhov yuav tsum tau ua tau zoo, kev tswj tus nqi, ib puag ncig kev tsim kho thiab lwm yam ntawm qhov project tshwj xeeb kom ua tiav qhov zoo tshaj plaws ntawm kev siv.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-21-2024