Mu matope ouma, cellulose ether ndi chowonjezera chachikulu chomwe chingathandize kwambiri ntchito ya matope onyowa ndikukhudza ntchito yomanga ya matope. Methyl cellulose ether imagwira ntchito yosunga madzi, kukhuthala, komanso kukonza magwiridwe antchito omanga. Kuchita bwino kosunga madzi kumatsimikizira kuti matopewo sangachititse kusweka, kupukutidwa ndi ufa komanso kuchepa kwa mphamvu chifukwa cha kusowa kwa madzi komanso kusungunuka kwa simenti kosakwanira; mphamvu yokoka Mphamvu ya kapangidwe ka matope onyowa imawonjezeka kwambiri, ndipo kuwonjezera kwa methyl cellulose ether kumatha kusintha kwambiri kukhuthala kwa matope onyowa, ndipo kumakhala kogwirizana bwino ndi zinthu zosiyanasiyana, motero kumawongolera magwiridwe antchito a matope onyowa pakhoma ndikuchepetsa zinyalala; kuphatikiza apo, zosiyana Ntchito ya cellulose muzinthu ndizosiyana, mwachitsanzo: cellulose mu zomatira za matailosi imatha kuwonjezera nthawi yotsegulira ndikusintha nthawi; cellulose mu matope opopera makina amatha kusintha mphamvu ya kapangidwe ka matope onyowa; pakudzilinganiza, cellulose imagwira ntchito poletsa kukhazikika, Kulekanitsa ndi kugawa.
Kupanga kwa ether ya cellulose kumapangidwa makamaka ndi ulusi wachilengedwe kudzera mu kusungunuka kwa alkali, kusakaniza (etherification), kutsuka, kuumitsa, kupukuta ndi njira zina. Zipangizo zazikulu za ulusi wachilengedwe zitha kugawidwa m'magulu awa: ulusi wa thonje, ulusi wa mkungudza, ulusi wa beech, ndi zina zotero. Mlingo wawo wa polymerization ndi wosiyana, zomwe zimakhudza kukhuthala komaliza kwa zinthu zawo. Pakadali pano, opanga ma cellulose akuluakulu amagwiritsa ntchito ulusi wa thonje (wopangidwa ndi nitrocellulose) ngati zinthu zazikulu zopangira. Ma ether a cellulose amatha kugawidwa m'magulu a ionic ndi non-ionic. Mtundu wa ionic umaphatikizapo mchere wa carboxymethyl cellulose, ndipo mtundu wosakhala ionic umaphatikizapo methyl cellulose, methyl hydroxyethyl (propyl) cellulose, ndi hydroxyethyl cellulose. Su ndi zina zotero. Mu matope ouma, chifukwa ionic cellulose (mchere wa carboxymethyl cellulose) ndi wosakhazikika pamaso pa ma calcium ions, sigwiritsidwa ntchito kawirikawiri pazinthu zouma monga simenti slaked laimu ngati zinthu zomangira simenti.
Kusunga madzi kwa cellulose kumagwirizananso ndi kutentha komwe kumagwiritsidwa ntchito. Kusunga madzi kwa methyl cellulose ether kumachepa ndi kuwonjezeka kwa kutentha. Mwachitsanzo, nthawi yachilimwe, pamene kuli kuwala kwa dzuwa, pulasitiki yakunja imapakidwa pulasitala, zomwe nthawi zambiri zimapangitsa kuti simenti ndi matope ziume mofulumira. Kuuma ndi kuchepa kwa kuchuluka kwa madzi omwe amasungidwa kumapangitsa kuti pakhale kumverera koonekeratu kuti ntchito yomanga komanso yotsutsana ndi ming'alu zimakhudzidwa. Pankhaniyi, ndikofunikira kwambiri kuchepetsa mphamvu ya zinthu zotentha. Nthawi zina sizingakwaniritse zosowa za kugwiritsa ntchito. Mankhwala ena amachitidwa pa cellulose, monga kuwonjezera kuchuluka kwa etherification, ndi zina zotero, kuti mphamvu yosunga madzi ikhalebe ndi zotsatira zabwino pa kutentha kwakukulu.
Kusunga madzi kwa cellulose: Zinthu zazikulu zomwe zimakhudza kusunga madzi kwa matope ndi monga kuchuluka kwa cellulose yomwe yawonjezeredwa, kukhuthala kwa cellulose, kusalala kwa cellulose, ndi kutentha kwa malo ogwirira ntchito.
Kukhuthala kwa cellulose: Kawirikawiri, kukhuthala kwakukulu, mphamvu yosungira madzi imakhala yabwino, koma kukhuthala kwakukulu, kulemera kwa maselo a cellulose kumakhala kwakukulu, komanso kuchepa kofanana kwa kusungunuka kwake, zomwe zimakhudza kwambiri magwiridwe antchito ndi mphamvu ya matope. Kukhuthala kwakukulu, mphamvu yokhuthala pa matope imawonekera bwino, koma sikufanana mwachindunji. Kukhuthala kwakukulu, kukhuthala kwa matope onyowa kumakhala kolimba kwambiri. Pakumanga, imamatirira ku scraper ndipo imakhala yolimba kwambiri ku substrate, koma sizingathandize kwambiri kuwonjezera mphamvu ya matope onyowa okha, ndipo mphamvu yotsutsana ndi kutsika sidzawonekera bwino panthawi yomanga.
Kusalala kwa cellulose: Kusalala kumakhudza kusungunuka kwa cellulose ether. Cellulose yopyapyala nthawi zambiri imakhala yopyapyala ndipo imafalikira mosavuta m'madzi popanda kusonkhana, koma kuchuluka kwa kusungunuka kumakhala kochedwa kwambiri. Sikoyenera kugwiritsidwa ntchito mu matope ouma. Maselo ena opangidwa m'nyumba ndi osalala, sikophweka kuwabalalitsa ndikusungunuka m'madzi, ndipo ndi kosavuta kuwaphatikiza. Ufa wokwanira wokha ndi womwe ungapewe kusonkhana kwa methyl cellulose ether mukawonjezera madzi ndikusakaniza. Koma ether yokhuthala ya cellulose sikuti imangowononga komanso imachepetsa mphamvu ya matope. Pamene matope ouma otere apangidwa pamalo akulu, liwiro lochira la matope am'deralo limachepa, ndipo ming'alu chifukwa cha nthawi zosiyanasiyana zochira imawonekera. Chifukwa cha nthawi yochepa yosakaniza, matope okhala ndi zomangamanga zamakina amafunika kusalala kwambiri.
Nthawi yotumizira: Feb-13-2023