Mpweya wothandiza wa efa wa cellulose

Ma cellulose ether ndi ma polima opangidwa ndi cellulose yachilengedwe ndipo amasinthidwa ndi mankhwala. Cellulose ether ndi yochokera ku cellulose yachilengedwe. Mosiyana ndi ma polima opangidwa, kupanga cellulose ether kumadalira cellulose, chinthu chofunikira kwambiri, chophatikizika cha polymer chachilengedwe. Chifukwa cha kapangidwe ka cellulose yachilengedwe, cellulose yokha ilibe mphamvu yochita ndi zinthu zothira. Komabe, pambuyo pochiza zosungunulira, ma hydrogen amphamvu pakati ndi mkati mwa unyolo wa mamolekyu amawonongeka, ndipo ntchito ya gulu la hydroxyl imatulutsidwa kukhala alkali cellulose yokhala ndi mphamvu yochitapo kanthu, ndipo pambuyo pochitapo kanthu kwa wothandizira wothira, gulu la OH limasinthidwa kukhala gulu la OR kuti lipeze cellulose ether.

Ma ether a cellulose ali ndi mphamvu yodziwikiratu yolowetsa mpweya pazinthu zatsopano zosakanikirana ndi simenti. Ma ether a cellulose ali ndi magulu a hydrophilic (hydroxyl, ether) ndi hydrophobic (methyl, glucose ring) ndipo ndi ma surfactants okhala ndi ntchito pamwamba ndipo motero amakhala ndi mphamvu yolowetsa mpweya. Mphamvu yolowetsa mpweya ya ether ya cellulose imapanga "mpira", zomwe zingathandize kuti zinthu zatsopano zigwire bwino ntchito, monga kuwonjezera pulasitiki ndi kusalala kwa matope panthawi yogwira ntchito, zomwe zimathandiza kufalikira kwa matope; zidzathandizanso kuti matope azigwira bwino ntchito ndikuchepetsa mtengo wopangira matope; komabe, zidzawonjezera porosity ya zinthu zolimba ndikuchepetsa mphamvu zake komanso elastic modulus, ndi zina zotero. Kapangidwe ka makina.

Monga chinthu chopangira zinthu zosungunulira, cellulose ether imakhalanso ndi mphamvu yonyowetsa kapena kudzola pa tinthu ta simenti, zomwe pamodzi ndi mphamvu yake yolowetsa mpweya zimawonjezera kusinthasintha kwa zinthu zosungunulira, koma mphamvu yake yokhuthala imachepetsa kusinthasintha, ndipo mphamvu ya cellulose ether pa kusinthasintha kwa zinthu zosungunulira ndi kuphatikiza kwa pulasitiki ndi kukhuthala. Kawirikawiri, pamene kuchuluka kwa cellulose ether kuli kochepa kwambiri, kumawonetsa makamaka mphamvu ya pulasitiki kapena kuchepetsa madzi; pamene kuchuluka kuli kwakukulu, mphamvu ya cellulose ether imawonjezeka mofulumira, ndipo mphamvu yake yolowetsa mpweya imakhala yodzaza, kotero imawonetsa mphamvu ya kukhuthala kapena imawonjezera kufunikira kwa madzi.