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Kukhuthala kwa ether ya cellulose kumadalira: kuchuluka kwa polymerization ya ether ya cellulose, kuchuluka kwa yankho, kuchuluka kwa shear, kutentha ndi zina. Kapangidwe ka gelling ka yankho ndi kapadera kwa alkyl cellulose ndi zotumphukira zake zosinthidwa. Kapangidwe ka gelation ndi r...Werengani zambiri»
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1. Kutentha kwa madzi Malinga ndi kakulidwe ka kutentha kwa madzi pakapita nthawi, njira yothira madzi ya simenti nthawi zambiri imagawidwa m'magawo asanu, omwe ndi nthawi yoyamba ya madzi (0~15min), nthawi yoyambitsa (15min~4h), nthawi yofulumizitsa ndi kukhazikitsa (4h~8h), kuchepetsa mphamvu ...Werengani zambiri»
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Pogwiritsa ntchito zipangizo zomangira, hydroxypropyl methylcellulose ndi chowonjezera chomwe chimagwiritsidwa ntchito kwambiri pa zinthu zomangira, ndipo hydroxypropyl methylcellulose imagwiritsidwa ntchito kwambiri m'mafakitale ndipo ili ndi mitundu yosiyanasiyana. Hydroxypropyl methylcellulose ikhoza kugawidwa m'magulu awiri: mtundu wa madzi ozizira nthawi yomweyo ndi mtundu wa hot melt,...Werengani zambiri»
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Mu putty, simenti ndi slurry yochokera ku gypsum, HPMC hydroxypropyl methylcellulose ether imagwira ntchito makamaka pakusunga ndi kukhuthala kwa madzi, ndipo imatha kukonza bwino kukana kwa slurry ndi kusakhazikika. Zinthu monga kutentha kwa mpweya, kutentha ndi liwiro la kuthamanga kwa mphepo zidzathandiza...Werengani zambiri»
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Hydroxypropyl methyl cellulose (HPMC) ndi mtundu wa ether ya cellulose yosakhala ionic yopangidwa ndi thonje lachilengedwe la polymer pogwiritsa ntchito mankhwala osiyanasiyana. Mu makampani omanga, kodi ntchito yaikulu ya hydroxypropyl methylcellulose ndi yotani? 1, simenti matope: kukonza kuchuluka kwa mchenga wa simenti, g...Werengani zambiri»
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Pogawika m'magulu malinga ndi zinthu zina, ma ether a cellulose amatha kugawidwa m'magulu a single ethers ndi mixed ethers; malinga ndi kusungunuka, ma ether a cellulose amatha kugawidwa m'magulu osungunuka m'madzi ndi osasungunuka m'madzi. Njira yayikulu yogawa ma ether a cellulose ndikugawa m'magulu malinga ndi ioni...Werengani zambiri»
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1. Kapangidwe ndi mfundo yokonzekera ya ether ya cellulose Chithunzi 1 chikuwonetsa kapangidwe ka ether ya cellulose. Gawo lililonse la bD-anhydroglucose (gawo lobwerezabwereza la cellulose) limalowa m'malo mwa gulu limodzi pamalo a C (2), C (3) ndi C (6), ndiko kuti, pakhoza kukhala magulu atatu a ether. Chifukwa cha ...Werengani zambiri»
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Zinthu zazikulu zomwe zimapangitsa kuti pamwamba pa putty isagwere madzi. Pambuyo pofufuza zinthu, kuyesa kwakukulu ndi machitidwe auinjiniya, wolembayo akukhulupirira kuti zinthu zazikulu zomwe zimapangitsa kuti pamwamba pa putty isagwere madzi ndi izi: Chifukwa 1. Calcium...Werengani zambiri»
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1. Hydroxypropyl methyl cellulose Hydroxypropyl methylcellulose ndi mtundu wa cellulose womwe kutulutsa ndi kugwiritsa ntchito kwake kukuwonjezeka mofulumira. Ndi ether yosakanikirana ya cellulose yosakhala ionic yopangidwa kuchokera ku thonje loyengedwa pambuyo pa alkalization, pogwiritsa ntchito propylene oxide ndi methyl chloride ngati etherification, kudzera...Werengani zambiri»
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Chinthu chofunika kwambiri cha yankho la ether ya cellulose ndi katundu wake wa rheological. Mphamvu zapadera za rheological za ether zambiri za cellulose zimapangitsa kuti zigwiritsidwe ntchito kwambiri m'magawo osiyanasiyana, ndipo kuphunzira za katundu wa rheological kumapindulitsa pakupanga minda yatsopano yogwiritsira ntchito kapena...Werengani zambiri»
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Kodi carboxymethyl cellulose ndi yotani? Yankho: Carboxymethyl cellulose ilinso ndi makhalidwe osiyanasiyana chifukwa cha madigiri ake osiyanasiyana osinthira. Mlingo wosinthira, womwe umadziwikanso kuti digiri ya etherification, umatanthauza kuchuluka kwapakati pa H m'magulu atatu a OH hydroxyl rep...Werengani zambiri»
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Carboxymethyl cellulose： Ionic cellulose ether imapangidwa kuchokera ku ulusi wachilengedwe (thonje, ndi zina zotero) pambuyo pochiza alkali, pogwiritsa ntchito sodium monochloroacetate ngati etherification, ndipo imachitidwa chithandizo chamankhwala osiyanasiyana. Mlingo wa kusintha nthawi zambiri umakhala 0.4 ~ 1.4, ndipo magwiridwe ake ndi abwino kwambiri...Werengani zambiri»