Kodi kukhuthala kwa hydroxypropyl methylcellulose hpmc ndi chiyani?

Putty ufa wamakoma amkati nthawi zambiri amakhala ndi kukhuthala kwa 100,000. Mtondo wa simenti uli ndi zofunikira zapamwamba kuti zisinthidwe, ndipo kukhuthala kwa 150,000 ndikosavuta kugwiritsa ntchito. Kuphatikiza apo, ntchito yofunika kwambiri ya HPMC ndikutseka madzi, ndikutsatiridwa ndi kukhuthala. Mu putty powder, ngati kusungidwa kwa madzi kuli bwino komanso mamasukidwe ake ndi otsika (7-80,000), amathanso kukhala ndi mamasukidwe apamwamba achilengedwe komanso kusunga bwino madzi. Pamene mamasukidwe akayendedwe kuposa 100,000, mamasukidwe akayendedwe ali ndi zotsatira zochepa pa kusunga madzi.

Chotsatira chachikulu cha chiyaniHPMC mu putty powder, komanso ngati organic chemistry imachitika?

HPMC imasewera ntchito zitatu za thickening, kusunga madzi ndi kumanga mu putty powder.

Kukula: Methylcellulose imatha kukhazikika ndi njira zoyandama, zamadzimadzi kuti zisunge magwiridwe antchito ofananirako komanso kupewa kupachika.

Kusunga madzi: Ufa wa mkati mwa khoma umauma pang’onopang’ono, ndipo laimu wowonjezeredwa wa kashiamu amawonekera m’kugwiritsa ntchito madzi.

Kumanga kwaumisiri: Methyl cellulose imakhala ndi mafuta, zomwe zingapangitse ufa wa putty kukhala ndi kapangidwe kabwino kaukadaulo.

HPMC sichimakhudzidwa ndi kusintha konse kwa mankhwala koma kumangowonjezera. Putty ufa, pakhoma, ndi kusintha kwa mankhwala, chifukwa pali kusintha kwatsopano kwa mankhwala, ufa wa putty umatuluka pakhoma, umatulutsa ufa, ndikugwiritsanso ntchito chifukwa mankhwala atsopano (calcium carbonate) apangidwa.

Zigawo zazikulu za calcium fly ash ndi: Ca(o)2, Cao ndi kachulukidwe kakang'ono ka Caco3, Caoh2oCa(oh)2-Ca(oh)2caco3h2o laimu amatha kusinthidwa kukhala calcium bicarbonate m'madzi ndi gasi, pomwe mpc ndi madzi okha sungunuka Kashiamu ntchentche phulusa ndi kusinkhasinkha wamphamvu, amene palokha satenga nawo mbali kusinkhasinkha kulikonse.

Ndi chiyani chomwe chiyenera kutsatiridwa pakugwiritsa ntchito kwenikweni ubale pakati pa mamasukidwe akayendedwe ndi kutentha kwa HPMC?

The mamasukidwe akayendedwe a HPMC ndi inversely proportional kutentha, mwa kuyankhula kwina, mamasukidwe akayendedwe ukuwonjezeka ndi kuchepa kutentha. The mamasukidwe akayendedwe a mankhwala, mamasukidwe akayendedwe a mankhwala zikutanthauza kuti 2% yankho ndi pa kutentha 20 digiri Celsius, ndi zotsatira mayeso.

M'mapulogalamu apadera, chidwi chiyenera kuperekedwa kumadera omwe ali ndi kusiyana kwakukulu kwa kutentha pakati pa chilimwe ndi nyengo yozizira, ndipo tikulimbikitsidwa kwambiri kugwiritsa ntchito kutsekemera kochepa m'nyengo yozizira. Apo ayi, mamasukidwe akayendedwe ndi otsika, mamasukidwe akayendedwe a cellulose adzawonjezeka, ndipo zokopa zidzakhala zolemetsa.

Kukhuthala kwapakatikati: 75000-100000 oyenera ufa wa putty
Chifukwa: kusunga bwino madzi

High mamasukidwe akayendedwe: 150000-200000 ndi oyenera polystyrene tinthu kutchinjiriza matope ndi zochita kupanga kutchinjiriza matope matope.
Zifukwa: kukhuthala kwakukulu, kuchotsedwa kovuta kwa matope a simenti, kutayika kwa gloss, kumanga bwino.