Cellulose ether imakhala ndi madzi abwino kwambiri osungira madzi, omwe angalepheretse chinyezi mumatope onyowa kuti asatuluke msanga kapena kutengeka ndi maziko, ndikuonetsetsa kuti simentiyo imakhala ndi madzi okwanira, potsiriza kuonetsetsa kuti makina amatope, omwe ndi opindulitsa kwambiri. ku dothi laling'ono lopyapyala ndi zigawo zapansi zomwe zimayamwa madzi Kapena matope opangidwa pansi pa kutentha kwambiri ndi nyengo youma. Mphamvu yosungira madzi ya cellulose ether imatha kusintha kamangidwe kakale ndikupititsa patsogolo ntchito yomanga. Mwachitsanzo, kumanga pulasitala kumatha kuchitidwa pazigawo zomwe zimayamwa madzi popanda kunyowetsa.
Kukhuthala, mlingo, kutentha kozungulira ndi kapangidwe ka cellulose ether zimakhudza kwambiri momwe madzi amasungira. Pansi pazikhalidwe zomwezo, kuchulukira kwamphamvu kwa cellulose ether, kumapangitsa kuti madzi asungidwe bwino; Kuchuluka kwa mlingo, kumapangitsa kuti madzi asungidwe bwino. Nthawi zambiri, kachulukidwe kakang'ono ka cellulose ether kumatha kusintha kwambiri kusungidwa kwamadzi mumatope. Mlingo ukafika wina wake Pamene mlingo wa kusunga madzi ukuwonjezeka, chizolowezi chosungira madzi chimachepetsa; kutentha kozungulira kumakwera, kusungidwa kwamadzi kwa cellulose ether kumachepa, koma ma ether ena osinthidwa a cellulose amakhalanso ndi madzi osungira bwino pansi pa kutentha kwambiri; ulusi wokhala ndi magawo otsika olowa m'malo a Vegan ether amakhala ndi ntchito yabwino yosungira madzi.
Gulu la hydroxyl pa molekyulu ya cellulose ether ndi atomu ya okosijeni pa mgwirizano wa ether udzalumikizana ndi molekyulu yamadzi kuti apange mgwirizano wa haidrojeni, kutembenuza madzi aulere kukhala madzi omangika, potero akugwira ntchito yabwino yosungira madzi; madzi molekyulu ndi mapalo etero maselo unyolo Interdiffusion amalola mamolekyu madzi kulowa mkati mwa cellulose etere macromolecular unyolo ndi pansi amphamvu zomangira mphamvu, potero kupanga omangidwa madzi ndi madzi omangika, amene bwino posungira madzi a simenti slurry; cellulose ether imapangitsa kuti simenti ikhale yabwino. The rheological properties, porous network structure ndi osmotic pressure kapena filimu-kupanga katundu wa mapadi ether amalepheretsa kufalikira kwa madzi.
Cellulose ether imapangitsa kuti matope amadzimadzi azikhala ndi kukhuthala kwabwino kwambiri, komwe kumatha kukulitsa luso lolumikizana pakati pa matope onyowa ndi gawo loyambira, ndikuwongolera magwiridwe antchito a matope. Amagwiritsidwa ntchito kwambiri popaka matope, matope omangira njerwa ndi njira yotchinjiriza kunja. The thickening zotsatira za mapadi efa kungathenso kuonjezera odana ndi kubalalikana luso ndi homogeneity wa zipangizo mwatsopano osakaniza, kupewa delamination zakuthupi, tsankho ndi magazi, ndipo angagwiritsidwe ntchito CHIKWANGWANI konkire, pansi pa madzi konkire ndi kudziletsa compacting konkire.
Kukhuthala kwa cellulose ether pazida zopangira simenti kumachokera ku viscosity ya cellulose ether solution. Pansi pazikhalidwe zomwezo, kukweza kukhuthala kwa cellulose ether, kumapangitsanso kukhuthala kwazinthu zosinthidwa za simenti, koma ngati mamasukidwe ake ndi okwera kwambiri, zimakhudza kutulutsa ndi magwiridwe antchito azinthu (monga kumata mpeni wopaka pulasitala). ). Mtondo wodziyimira pawokha ndi konkriti wodziphatika, zomwe zimafunikira madzi ambiri, zimafunikira kukhuthala kwa cellulose ether. Kuphatikiza apo, kukhuthala kwa cellulose ether kumawonjezera kufunikira kwamadzi pazinthu zopangira simenti ndikuwonjezera zokolola zamatope.
The mamasukidwe akayendedwe a mapadi etero njira zimadalira zinthu zotsatirazi: maselo kulemera kwa mapadi etere, ndende, kutentha, kukameta ubweya mlingo ndi mayeso njira. Pazifukwa zomwezo, kuchuluka kwa maselo a cellulose ether, kumapangitsanso kukhuthala kwa yankho; kumtunda kwa ndende, kumapangitsanso kukhuthala kwa yankho. Mukamagwiritsa ntchito, samalani kuti musapewe kumwa mowa mopitirira muyeso komanso kukhudza ntchito ya matope ndi konkire; cellulose ether The viscosity ya ether solution idzachepa ndi kuwonjezeka kwa kutentha, ndipo kumtunda kwa ndende, kumapangitsanso kutentha kwakukulu; Ma cellulose ether solution nthawi zambiri amakhala pseudoplastic fluid ndi katundu wa kumeta ubweya wa ubweya, kumeta ubweya wambiri pa nthawi ya mayesero , kutsekemera kwazing'ono, kotero, mgwirizano wa matope udzachepa pansi pa mphamvu ya kunja, yomwe imapindulitsa kupukuta kumanga matope, kotero kuti matope akhoza kukhala ndi ntchito yabwino ndi kugwirizana nthawi yomweyo; chifukwa njira ya cellulose ether si ya Newtonian Kwa madzi, pamene njira zoyesera, zida ndi zida kapena malo oyesera omwe amagwiritsidwa ntchito poyesa mamasukidwe akayendedwe ndi osiyana, zotsatira za mayeso a selulose efa zomwezo zidzakhala zosiyana kwambiri.
Ma cellulose ether mamolekyu amatha kukonza mamolekyu ena amadzi azinthu zatsopano pamphepete mwa unyolo wa maselo, motero amawonjezera kukhuthala kwa yankho. Unyolo wa maselo a cellulose ether amalumikizana kuti apange maukonde amitundu itatu, zomwe zipangitsanso kuti yankho lake lamadzi likhale ndi kukhuthala kwabwino.
High-viscosity cellulose ether amadzimadzi njira ali mkulu thixotropy, amenenso ndi khalidwe lalikulu la mapadi ether. Amadzimadzi njira methyl mapadi zambiri pseudoplastic ndi sanali thixotropic fluidity m'munsimu ake gel osakaniza kutentha, koma kusonyeza Newtonian otaya katundu pa otsika kukameta ubweya mitengo. Pseudoplasticity imawonjezeka ndi kulemera kwa maselo kapena kuchuluka kwa cellulose ether, mosasamala kanthu za mtundu wa cholowa m'malo ndi kuchuluka kwa m'malo. Choncho, ma cellulose ethers a kalasi yofanana ya viscosity, mosasamala kanthu za mc, HPmc, HEmc, nthawi zonse amawonetsa zofanana za rheological malinga ngati ndende ndi kutentha zimasungidwa nthawi zonse. Ma gels apangidwe amapangidwa pamene kutentha kumakwera, ndipo kutuluka kwa thixotropic kwambiri kumachitika. Mkulu ndende ndi otsika mamasukidwe akayendedwe mapadi ethers amasonyeza thixotropy ngakhale pansi pa kutentha gel osakaniza. Katunduyu ndiwopindulitsa kwambiri pakuwongolera kusanja ndi kugwa pakupanga matope omangira. Payenera kufotokozedwa apa kuti kukwezeka kwa kukhuthala kwa cellulose ether, kusungika kwamadzi kwabwino, koma kukhuthala kwamphamvu, kumapangitsanso kuchuluka kwa maselo a cellulose ether, komanso kuchepa kofananira ndi kusungunuka kwake, komwe kumakhala ndi zotsatira zoyipa. pa ndende yamatope ndi ntchito yomanga. The apamwamba mamasukidwe akayendedwe, zoonekeratu kwambiri thickening zotsatira pa matope, koma si kwathunthu molingana. Kukhuthala kwina kwapakatikati ndi kotsika, koma ether yosinthidwa ya cellulose imakhala ndi magwiridwe antchito abwino pakuwongolera mphamvu zamapangidwe amatope onyowa. Ndi kuwonjezeka kwa mamasukidwe akayendedwe, kasungidwe kamadzi ka cellulose ether kumapita bwino.
Nthawi yotumiza: Feb-28-2023