Air-entraining zotsatira za cellulose ether

Ma cellulose ethers ndi ma polima opangidwa kuchokera ku cellulose wachilengedwe ndipo amasinthidwa ndi mankhwala. Cellulose ether ndi chochokera ku cellulose yachilengedwe. Mosiyana ndi ma polima opangira, kupanga ma cellulose ether kumachokera pa cellulose, zinthu zofunika kwambiri, polima wachilengedwe. Chifukwa cha mawonekedwe achilengedwe a cellulose, cellulose palokha sangathe kuchitapo kanthu ndi etherizing agents. Komabe, pambuyo pa chithandizo cha solubilizers, zomangira zamphamvu za haidrojeni pakati ndi mkati mwa unyolo wa maselo zimawonongeka, ndipo ntchito ya gulu la hydroxyl imatulutsidwa mu cellulose yamchere ndikutha kuchitapo kanthu, ndipo pambuyo pakuchita kwa etherizing agent gulu la OH limasinthidwa. m'gulu OR kuti mupeze cellulose ether.

Ma cellulose ethers ali ndi mphamvu yodziwikiratu yopatsa mpweya pazinthu zosakanikirana zatsopano za simenti. Ma cellulose ethers ali ndi magulu onse a hydrophilic (hydroxyl, ether) ndi hydrophobic (methyl, glucose ring) ndipo ali ndi ma surfactants omwe amagwira ntchito pamtunda ndipo motero amakhala ndi mphamvu yopatsa mpweya. Mphamvu ya mpweya wa cellulose ether idzatulutsa zotsatira za "mpira", zomwe zingathe kupititsa patsogolo ntchito ya zinthu zatsopano, monga kuwonjezera pulasitiki ndi kusalala kwa matope panthawi yogwira ntchito, zomwe zimapindulitsa kufalitsa matope; idzawongoleranso zokolola zamatope ndikuchepetsa mtengo wopangira matope; komabe, zidzawonjezera porosity ya zinthu zowumitsidwa ndikuchepetsa mphamvu zake ndi zotanuka modulus, etc. Mechanical properties.

Monga surfactant, mapadi efa alinso kunyowetsa kapena lubricating zotsatira pa simenti particles, amene pamodzi ndi mpweya-entraining zotsatira kumawonjezera fluidity wa zipangizo simenti, koma thickening zotsatira amachepetsa fluidity, ndi zotsatira za mapadi efa pa fluidity wa. cementitious zipangizo ndi osakaniza plasticizing ndi thickening zotsatira. Kawirikawiri, pamene kuchuluka kwa cellulose ether kumakhala kochepa kwambiri, kumawonetsa makamaka zotsatira za plasticization kapena kuchepetsa madzi; pamene kuchuluka kwake kuli kwakukulu, mphamvu yowonjezereka ya cellulose ether imakula mofulumira, ndipo zotsatira zake zolowetsa mpweya zimakhala zodzaza, choncho zimasonyeza kuwonjezereka kapena kumawonjezera kufunikira kwa madzi.