Mu matope osakaniza okonzeka, mpaka pang'onoether ya celluloseZingathandize kwambiri ntchito ya matope onyowa, ndipo zitha kuoneka kuti ether ya cellulose ndi chinthu chachikulu chomwe chimakhudza ntchito yomanga matope.
Kusankha mitundu yosiyanasiyana, kukhuthala kosiyanasiyana, kukula kosiyana kwa tinthu, madigiri osiyanasiyana a kukhuthala ndi kuwonjezera ma ether a cellulose kumakhudzanso kusintha kwa magwiridwe antchito a matope ouma. Pakadali pano, matope ambiri opangidwa ndi miyala ndi pulasitala ali ndi magwiridwe antchito osasunga madzi, ndipo matope amadzi amalekanitsidwa patatha mphindi zochepa atayima. Chifukwa chake ndikofunikira kwambiri kuwonjezera ether ya cellulose mu matope a simenti.
kusunga madzi
Kusunga madzi ndi ntchito yofunika kwambiri ya methyl cellulose ether, ndipo ndi ntchito yomwe opanga matope ambiri osakaniza ndi madzi m'nyumba, makamaka omwe ali m'madera akum'mwera komwe kutentha kwambiri, amasamala nayo.
Pakupanga zipangizo zomangira, makamaka matope ouma, cellulose ether imagwira ntchito yosasinthika, makamaka pakupanga matope apadera (matope osinthidwa), ndi gawo lofunika kwambiri komanso lofunika kwambiri.
Kukhuthala, mlingo, kutentha kwa malo ozungulira, ndi kapangidwe ka maselo a cellulose ether zimakhudza kwambiri momwe imagwirira ntchito posunga madzi. Pansi pa mikhalidwe yomweyi, kukhuthala kwa cellulose ether kumakhala kwakukulu, kusungunuka kwa madzi kumakhala bwino; mlingo ukakwera, kusungunuka kwa madzi kumakhala bwino. Nthawi zambiri, kuchuluka kochepa kwa cellulose ether kumatha kusintha kwambiri kusungunuka kwa madzi mu matope. Mlingo ukafika pamlingo winawake Pamene kuchuluka kwa kusungunuka kwa madzi kumawonjezeka, kuchuluka kwa kusungunuka kwa madzi kumachepa; kutentha kwa malo ozungulira kukakwera, kusungunuka kwa madzi kwa cellulose ether nthawi zambiri kumachepa, koma ma cellulose ether ena osinthidwa nawonso amakhala ndi kusungunuka kwa madzi bwino pansi pa kutentha kwakukulu; ulusi wokhala ndi madigiri otsika a Vegan ether umakhala ndi kusungunuka kwabwino kwa madzi.
Gulu la hydroxyl pa molekyulu ya cellulose ether ndi atomu ya okosijeni pa ether bond zidzagwirizana ndi molekyulu yamadzi kuti zipange chomangira cha haidrojeni, kusandutsa madzi aulere kukhala madzi omangika, motero zimagwira ntchito yabwino pakusunga madzi; molekyulu yamadzi ndi unyolo wa maselo a cellulose ether Interdiffusion imalola mamolekyu amadzi kulowa mkati mwa unyolo wa maselo a cellulose ether ndipo imakumana ndi mphamvu zolimba zomangira, motero kupanga madzi aulere, kukumba madzi, ndikukweza kusunga madzi kwa simenti; cellulose ether imawongolera slurry ya simenti yatsopano. Katundu wa rheological, kapangidwe ka netiweki yokhala ndi porous ndi kuthamanga kwa osmotic kapena mawonekedwe opanga filimu a cellulose ether amalepheretsa kufalikira kwa madzi.
kukhuthala ndi thixotropy
Cellulose etherImapatsa matope onyowa kukhuthala kwabwino kwambiri, komwe kumatha kuwonjezera mphamvu yolumikizirana pakati pa matope onyowa ndi maziko, ndikuwonjezera magwiridwe antchito oletsa kugwa kwa matope. Amagwiritsidwa ntchito kwambiri popaka matope, matope olumikizira njerwa ndi makina oteteza makoma akunja. Mphamvu yokhuthala ya cellulose ether imathanso kuwonjezera mphamvu yotsutsana ndi kufalikira ndi kufanana kwa zinthu zatsopano zosakanikirana, kupewa kugawanika kwa zinthu, kulekanitsa ndi kutuluka magazi, ndipo ingagwiritsidwe ntchito mu konkriti ya ulusi, konkriti ya pansi pa madzi ndi konkriti yodzikakamiza yokha.
Mphamvu yokhuthala ya cellulose ether pa zinthu zopangidwa ndi simenti imachokera ku kukhuthala kwa yankho la cellulose ether. Pansi pa mikhalidwe yomweyi, kukhuthala kwa cellulose ether kukakwera, kukhuthala kwa zinthu zopangidwa ndi simenti yosinthidwa kumakhala bwino, koma ngati kukhuthala kuli kwakukulu, kudzakhudza kusinthasintha ndi kugwira ntchito kwa zinthuzo (monga kuyika mpeni wopaka pulasitala). Mtondo wodziyimira pawokha ndi konkire wodzigwirizanitsa, zomwe zimafuna kukhuthala kwakukulu, zimafuna kukhuthala kochepa kwa cellulose ether. Kuphatikiza apo, kukhuthala kwa cellulose ether kudzawonjezera kufunikira kwa madzi kwa zinthu zopangidwa ndi simenti ndikuwonjezera kuchuluka kwa matope.
Madzi a cellulose ether okhala ndi kukhuthala kwakukulu ali ndi thixotropy yambiri, yomwe ndi khalidwe lalikulu la cellulose ether. Madzi a methyl cellulose nthawi zambiri amakhala ndi pseudoplastic ndi non-thixotropic fluidity pansi pa kutentha kwa gel, koma amasonyeza makhalidwe a Newtonian flow pamlingo wotsika wa shear. Pseudoplasticity imawonjezeka ndi kulemera kwa molekyulu kapena kuchuluka kwa cellulose ether, mosasamala kanthu za mtundu wa cholowa m'malo ndi mlingo wa cholowa m'malo. Chifukwa chake, cellulose ethers yamtundu womwewo wa viscosity, mosasamala kanthu za MC, HPMC, HEMC, nthawi zonse imawonetsa makhalidwe ofanana a rheological bola ngati kuchuluka ndi kutentha zikusungidwa nthawi zonse. Ma gels opangidwa amapangidwa kutentha kukakwera, ndipo kuyenda kwa thixotropic kwambiri kumachitika.
Ma ether a cellulose okhala ndi kuchuluka kwakukulu komanso kukhuthala kochepa amasonyeza thixotropy ngakhale pansi pa kutentha kwa gel. Katunduyu ndi wothandiza kwambiri pakusintha kusinthasintha ndi kutsika pomanga matope omangira. Apa tikuyenera kufotokoza kuti kukhuthala kwa cellulose ether kumakhala kwakukulu, kusunga madzi kumakhala bwino, koma kukhuthala kwakukulu, kulemera kwa molekyulu ya cellulose ether kumakhala kwakukulu, komanso kuchepa kofanana kwa kusungunuka kwake, komwe kumakhudza kwambiri kuchuluka kwa matope ndi magwiridwe antchito omanga.
Kupumira mpweya
Cellulose ether imakhala ndi mphamvu yodziwikiratu yolowetsa mpweya pa zinthu zatsopano zopangidwa ndi simenti. Cellulose ether ili ndi magulu okonda madzi (magulu a hydroxyl, magulu a ether) ndi magulu okonda madzi (magulu a methyl, mphete za glucose), ndipo ndi chinthu chogwiritsa ntchito madzi chomwe chimagwira ntchito pamwamba, motero chimakhala ndi mphamvu yolowetsa mpweya. Mphamvu yolowetsa mpweya ya cellulose ether imapanga "mpira", zomwe zingathandize kuti zinthu zatsopano zigwire bwino ntchito, monga kuwonjezera pulasitiki ndi kusalala kwa matope panthawi yogwira ntchito, zomwe zimathandiza kuti matope afalikire; zidzawonjezeranso kutulutsa kwa matope, kuchepetsa mtengo wopanga matope; koma zidzawonjezera porosity ya zinthu zolimba ndikuchepetsa mphamvu zake monga mphamvu ndi elastic modulus.
Monga chinthu chopangira zinthu zosungunulira, cellulose ether imakhalanso ndi mphamvu yonyowetsa kapena kudzola pa tinthu ta simenti, zomwe zimawonjezera kusinthasintha kwa zinthu zopangidwa ndi simenti pamodzi ndi mphamvu yake yolowetsa mpweya, koma mphamvu yake yokulitsa imachepetsa kusinthasintha kwa madzi. Mphamvu ya kusinthasintha kwa madzi ndi kuphatikiza kwa pulasitiki ndi kukhuthala. Nthawi zambiri, pamene kuchuluka kwa cellulose ether kuli kochepa kwambiri, ntchito yayikulu ndi pulasitiki kapena kuchepetsa madzi; pamene kuchuluka kuli kwakukulu, mphamvu ya cellulose ether imawonjezeka mofulumira, ndipo mphamvu yake yolowetsa mpweya imakhala yodzaza. Chifukwa chake imawonekera ngati mphamvu yokhuthala kapena kuwonjezeka kwa kufunikira kwa madzi.
kuchedwa
Cellulose etherZimawonjezera nthawi yoyika simenti kapena matope, ndikuchedwetsa kayendedwe ka madzi a simenti, zomwe zimathandiza kukonza nthawi yogwirira ntchito ya zinthu zosakanikirana zatsopano, kukonza kukhazikika kwa matope ndi kutayika kwa simenti pakapita nthawi, komanso zingayambitsenso kuchedwa kwa ntchito yomanga.
Nthawi yotumizira: Epulo-25-2024