Wowuma ether ndi mawu wamba a gulu la zowuma zosinthidwa zomwe zili ndi zomangira za ether mu molekyulu, yomwe imadziwikanso kuti wowuma wa etherified, womwe umagwiritsidwa ntchito kwambiri pamankhwala, chakudya, nsalu, kupanga mapepala, mankhwala a tsiku ndi tsiku, mafuta amafuta ndi mafakitale ena. Masiku ano timafotokoza makamaka ntchito ya wowuma ether mumatope.
Mawu oyamba a Starch Ether
Zomwe zimagwiritsidwa ntchito kwambiri ndi mbatata, tapioca starch, chimanga starch, tirigu wowuma, ndi zina zotero. Poyerekeza ndi wowuma wa phala wokhala ndi mafuta ochulukirapo komanso mapuloteni ambiri, wowuma wa mizu monga mbatata ndi tapioca ndi woyera kwambiri.
Wowuma ndi polysaccharide macromolecular pawiri wopangidwa ndi shuga. Pali mitundu iwiri ya mamolekyu, yozungulira ndi nthambi, yotchedwa amylose (pafupifupi 20%) ndi amylopectin (pafupifupi 80%). Pofuna kukonza zinthu za wowuma zomwe zimagwiritsidwa ntchito muzomangamanga, njira zakuthupi ndi zamankhwala zitha kugwiritsidwa ntchito kuti zisinthidwe kuti zipangitse kuti katundu wake akhale woyenera pazolinga zosiyanasiyana zomangira.
Wowuma wa etherified umaphatikizapo mitundu yosiyanasiyana yazinthu. Monga carboxymethyl starch ether (CMS), hydroxypropyl starch ether (HPS), hydroxyethyl starch ether (HES), cationic starch ether, etc. Ambiri amagwiritsidwa ntchito hydroxypropyl starch ether.
Ntchito ya hydroxypropyl starch ether mumatope
1) Thirani matope, onjezerani anti-sagging, anti-sagging ndi rheological properties za matope.
Mwachitsanzo, popanga zomatira matailosi, putty, ndi pulasitala matope, makamaka tsopano kuti kupopera mbewu mankhwalawa kumafuna madzi ochulukirapo, monga matope opangidwa ndi gypsum, ndikofunikira kwambiri (gypsum wopopera pamakina amafunikira madzi ambiri koma amayambitsa kutsika kwambiri. , Etere wowuma akhoza kupanga chosowa ichi).
Fluidity ndi sag resistance nthawi zambiri zimatsutsana, ndipo kuchuluka kwa madzimadzi kumayambitsa kuchepa kwa sag resistance. Mtondo wokhala ndi ma rheological properties ukhoza kuthetsa kusagwirizana koteroko, ndiko kuti, mphamvu yakunja ikagwiritsidwa ntchito, kukhuthala kumachepa, kumapangitsa kuti ntchito ikhale yogwira ntchito komanso yothamanga, ndipo mphamvu yakunja ikachotsedwa, kukhuthala kumawonjezeka ndipo kukana kwamphamvu kumakula.
Pakuchulukirachulukira kwa matailosi, kuwonjezera wowuma ether kumatha kupititsa patsogolo kukana kwa zomatira za matailosi.
2) Maola otsegulira owonjezera
Kwa zomatira za matailosi, zimatha kukwaniritsa zofunikira za zomatira zapadera (Kalasi E, 20min yowonjezera mpaka 30min kuti ifike ku 0.5MPa) yomwe imakulitsa nthawi yotsegulira.
Kupititsa patsogolo katundu
Wowuma ether amatha kupangitsa kuti pamwamba pa gypsum base ndi dongo la simenti likhale losalala, losavuta kugwiritsa ntchito, komanso limakongoletsa bwino. Ndilofunika kwambiri pakupaka matope ndi matope owonda okongoletsera monga putty.
Njira yogwiritsira ntchito hydroxypropyl starch ether
Wowuma ether akasungunuka m'madzi, amamwazikana mofanana mumatope a simenti. Popeza kuti molekyulu ya starch ether imakhala ndi maukonde ndipo imayimbidwa molakwika, imatenga tinthu tating'ono ta simenti ndipo imakhala ngati mlatho wosinthira kuti ulumikizane ndi simenti, potero kupereka Kuchuluka kwa zokolola za slurry kumatha kusintha anti-sag kapena anti-slip. zotsatira.
Kusiyana pakati pa hydroxypropyl starch ether ndi cellulose ether
1. Wowuma ether amatha kusintha bwino anti-sag ndi anti-slip properties of mortar
Ma cellulose ether nthawi zambiri amatha kupititsa patsogolo kukhuthala komanso kusunga madzi kwadongosolo koma sangathe kupititsa patsogolo anti-sagging ndi anti-slip properties.
2. Makulidwe ndi mamasukidwe akayendedwe
Nthawi zambiri, mamasukidwe a cellulose ether ndi pafupifupi masauzande, pomwe mamasukidwe a wowuma ether ndi mazana angapo mpaka masauzande angapo, koma izi sizikutanthauza kuti wowuma ether ali ndi mphamvu yolowera mpweya, pomwe wowuma ether alibe katundu wolowera mpweya. .
5. Maselo a cellulose ether
Ngakhale wowuma ndi cellulose amapangidwa ndi mamolekyu a glucose, njira zawo zopangira ndizosiyana. Mayendedwe a mamolekyu onse a glucose mu wowuma ndi wofanana, pomwe cellulose ndi yosiyana, ndipo mawonekedwe a mamolekyu onse oyandikana nawo amatsutsana. Kusiyana kwapangidweku kumatsimikiziranso kusiyana kwa zinthu za cellulose ndi wowuma.
Nthawi yotumiza: Apr-10-2023