1. Cov khoom siv ntawm cellulose ether
Cellulose ether rau kev tsim kho yog cov dej tsis-ionic-ionic-soluble polymer uas nws muaj qhov twg los:
Cellulose (ntoo pulp lossis cov paj rwb rinter), ethane chloride, Epoxy cov tshuaj sib xyaw (Eproxy cov tshuaj sib xyaw (Eply Oxide, Propylene Oxide, thiab lwm yam)
HPMC-HydroxyPropyyl methyl cellulose ether
HEC-Hydroxyethyl Cellulose ether
HEMC-Hydroxyethyl Methyl Cellulose ether
Ehec-ethyl hydroxyethyl cellulose ether
MC-Methyl Cellulose ether
2. Cov khoom ntawm cellulose ether
Cov yam ntxwv ntawm cellulose muaj kev pab qhia nyob ntawm:
Polymerization Qib DP tus naj npawb ntawm cov dej qab zib-viscosity
Cov chaw nyob thiab lawv cov qib hloov chaw, Qib ntawm kev sib txawv ntawm kev hloov pauv - txiav txim siab daim ntawv thov teb
Qhov loj me me - solubility
Kev Kho Deg (piv txwv li ncua kev xaus) - lub sijhawm viscosity muaj feem xyuam rau tus nqi ntawm lub system
Kev hloov kho qib - txhim kho cov sag tiv thaiv thiab ua haujlwm ntawm cellulose ether.
3. Lub luag haujlwm ntawm cellulose ether - ywg dej
Cellulose ether yog ib txoj saw hlau polymer muaj kev sib txuas ntawm β-d-flucose units. Cov pab pawg hydroxyl hauv cov molecule thiab cov pa atom ntawm lub kaus mom hydrogen bond nrog cov dej molecule, uas adsorbs cov dej molecule, uas adsorbu daim saw thiab entangles cov lwg me me. Nyob rau hauv txoj saw hlau, nws qeeb ntawm cov dej evaporation thiab yog nqus los ntawm lub hauv paus txheej.
Cov txiaj ntsig tau muab los ntawm cov khoom siv dej ntawm cov khoom ntawm cellulose:
Tsis tas yuav ntub dej txheej, txuag txheej txheem
Kev Tsim Kho Zoo
txaus zog
4. Lub luag haujlwm ntawm cellulose ether - thickenly nyhuv
Cellulose ether tuaj yeem nce cohesion nruab nrab ntawm cov cheebtsam ntawm gypsum-raws li kev sib xyaw, uas tau cuam tshuam nyob rau hauv kev sib xyaw ntawm cug.
Cov txiaj ntsig tau muab los ntawm cov thickening ntawm cellulose muaj cov neeg muaj:
Txo cov av tshauv
Nce adhesion rau hauv paus
Txo cov sagging ntawm cug
Khaws lub tshuaj khib txawm
5. Lub luag haujlwm ntawm cellulose ether - cov dej num nto
Cellulose ether muaj cov pab pawg hydrophricic (hydroxylic pawg) thiab hydluylic ib pawg, ib pawg, qab zib) thiab yog qhov surfactant.
(Qhov nro ntawm cov dej yog 72mn / m, surfactant yog 30mn / m, thiab cellulose ether yog HPCC 50, HEC 56, CELC 71MN / M)
Cov txiaj ntsig tau muab los ntawm cov kev ua si ntawm cellulose yog:
Cua-Entraining nyhuv (du scraping, tsis tshua ntub ntom ntom ntom, cov modulity me me, khov-thau-thim-thau)
Ntub dej (nce adhesion rau substrate)
6. Xav tau ntawm lub teeb plastering gypsum rau cellulose ether
(1). Dej Zoo Tuav
(2). Kev ua haujlwm zoo, tsis muaj nchuav
(3). Batch scraping du
(4). Muaj zog tiv thaiv-sagging
(5). Cov pa taws kub yog siab tshaj 75 ° C
(6). Ceev kawg nkaus
(7). Nws yog qhov zoo tshaj yog kom muaj peev xwm entrain thiab ruaj pab huab cua npuas hauv lub tshuaj khib
11. Yuav ua li cas txiav txim siab cov tshuaj ntawm cellulose ether
For plastering plasters, it is necessary to retain sufficient water in the mortar over a long period of time in order to have good workability and to avoid surface cracks. Tib lub sijhawm, cellulose ether khaws cov dej uas tsim nyog rau dej ntev kom cov tshuaj khib tau muaj kev sib xyaw.
Tus nqi ntawm cellulose ether nyob ntawm:
Viscosity ntawm cellulose ether
Cov txheej txheem ntau lawm ntawm cellulose ether
Cov ntsiab lus hloov chaw thiab xa tawm ntawm cellulose ether
Particle loj muab faib rau ntawm cellulose ether
Hom thiab muaj pes tsawg leeg ntawm gypsum-raws cug
Dej nqus dej uas muaj peev xwm ntawm lub hauv paus txheej
Kev Siv Dej Rau Cov Qauv Diffusion ntawm Gypsum-Raws li CUG
Lub sijhawm teeb tsa ntawm Gypsum-raws cug
Siv tuab thiab ua kev ua haujlwm
Cov kev tsim kho (xws li qhov kub thiab txias, cua nrawm, thiab lwm yam)
Txoj kev tsim qauv (phau ntawv scraping, tshuab txau)
Lub Sijhawm Post: Jan-18-2023