Ma cellulose ether ndi liwu lodziwika bwino lazinthu zingapo zopangidwa ndi momwe alkali cellulose ndi etherifying agent pansi pazifukwa zina. Ma cellulose a alkali amasinthidwa ndi ma etherifying agents osiyanasiyana kuti apeze zosiyanama cellulose ethers. Malinga ndi ma ionization olowa m'malo, ma cellulose ether amatha kugawidwa m'magulu awiri: ionic (monga carboxymethyl cellulose) ndi non-ionic (monga methyl cellulose). Malinga ndi mtundu wa zolowa m'malo, cellulose ether imatha kugawidwa kukhala monoether (monga methyl cellulose) ndi ether yosakanikirana (monga hydroxypropyl methyl cellulose). Malingana ndi kusungunuka kosiyanasiyana, kumatha kugawidwa m'madzi osungunuka (monga hydroxyethyl cellulose) ndi organic solvent-soluble (monga ethyl cellulose), ndi zina zotero. ogaŵikana mtundu nthawi yomweyo ndi padziko ankachitira anachedwa Kusungunuka mtundu.
Pambuyo pa ether ya cellulose mumatope itasungunuka m'madzi, kugawa bwino ndi yunifolomu kwa zinthu za simenti mu dongosolo kumatsimikiziridwa chifukwa cha ntchito yapamtunda, ndipo cellulose ether, monga colloid yoteteza, "kukulunga" tinthu zolimba ndi zophimba. iwo kumtunda wakunja. Pangani filimu yothira mafuta, pangani matope kuti azikhala okhazikika, komanso akonzenso madzi a matope panthawi yosakaniza ndi kusalala kwa zomangamanga.
Chifukwa cha mawonekedwe ake a mamolekyu, njira ya cellulose ether imapangitsa kuti madzi a mumatope asakhale osavuta kutaya, ndipo pang'onopang'ono amawamasula kwa nthawi yaitali, ndikupangitsa kuti matope azikhala ndi madzi abwino osungira komanso ogwira ntchito.
Dongo lodziyimira pawokha la simenti, lokhala ndi viscosity yochepa ya hydroxypropyl methylcellulose ether. Popeza kuti nthaka yonseyo mwachibadwa imakonzedwa popanda kulowererapo pang'ono kwa ogwira ntchito yomanga, poyerekeza ndi njira yapitayi yosalala, kutsetsereka ndi liwiro la zomangamanga zimakhala bwino kwambiri. Nthawi yosakaniza yowuma yokhayokha imatengera mwayi wosungirako madzi kwa hydroxypropyl methylcellulose. Popeza kuti kudziika pawokha kumafuna kuti matope osakanikirana bwino azitha kuyandama pansi, madziwo amakhala aakulu ndithu. Pambuyo powonjezera hpmc, idzalamulira pansi Kusungirako madzi pamtunda sikuonekeratu, zomwe zimapangitsa kuti mphamvu ya pamwamba ikhale pamwamba itatha kuyanika, ndipo shrinkage ndi yaying'ono, yomwe imachepetsa ming'alu. Kuwonjezera kwa HPMC kumaperekanso mamasukidwe akayendedwe, omwe angagwiritsidwe ntchito ngati chithandizo chotsutsana ndi sedimentation, kupititsa patsogolo madzi ndi kupopera, komanso kupititsa patsogolo kuyendetsa bwino pansi.
Ma cellulose ether abwino amakhala ndi mawonekedwe owoneka bwino komanso kachulukidwe kakang'ono; HPMC yoyera ili ndi kuyera bwino, zopangira zomwe zimagwiritsidwa ntchito popanga ndi zoyera, momwe zimakhalira mosamalitsa komanso zopanda zonyansa, njira yamadzimadzi imakhala yomveka bwino, kutulutsa kuwala kumakhala kwakukulu, ndipo palibe ammonia, starch ndi mowa. Kulawa, ulusi pansi pa maikulosikopu kapena galasi lokulitsa.
Nthawi yotumiza: Dec-06-2022