Kukhuthala kwa cellulose ether

Cellulose etherimapanga matope onyezimira okhala ndi kukhuthala kwabwino kwambiri, amatha kukulitsa luso lomangirira lamatope onyowa ndi udzu, kuwongolera magwiridwe antchito a matope, omwe amagwiritsidwa ntchito kwambiri mumatope a pulasitala, makina otchinjiriza akunja ndi matope omangira njerwa. The thickening zotsatira za mapadi efa kungachititsenso kuti chifanane ndi odana ndi kubalalitsidwa luso latsopano simenti zochokera zipangizo, kupewa stratification, tsankho ndi magazi a matope ndi konkire, angagwiritsidwe ntchito CHIKWANGWANI konkire, pansi pa madzi konkire ndi kudziletsa compacting konkire.

Cellulose etherkumawonjezera mamasukidwe akayendedwe a zinthu zozikidwa pa simenti kuchokera ku mamasukidwe a cellulose ether solution. Nthawi zambiri ntchito “kukhuthala kwa mamasukidwe akayendedwe” metric uwu kuwunika mapanelo etere yankho kukhuthala, mamasukidwe akayendedwe a mapadi etere zambiri amatanthauza ndende (2%) ya mapadi etero njira, kutentha (20 ℃) ​​ndi kukameta ubweya mlingo (kapena atembenuza liwiro, monga 20 RPM) mikhalidwe, ndi makonzedwe a miyeso viscometer yoyezera. Kukhuthala ndi gawo lofunikira pakuwunika magwiridwe antchito a cellulose ether ndi mapadi efa, kukhathamira kwamphamvu kwa yankho, kukhuthala bwino kwa zinthu zoyambira za simenti, kukhuthala kwa zinthu zoyambira kumatha, kukana kukana komanso kukana mphamvu zobalalika, koma ngati mamasukidwe akayendedwe ndi akulu kwambiri, angakhudze masinthidwe amtundu wa pulasitala ndi pulasitala. Choncho, mamasukidwe akayendedwe a mapadi ether ntchito youma-osakaniza matope nthawi zambiri 15,000 ~ 60,000 Mpa. s-1, ndi kukhuthala kwa cellulose ether kumafunika kukhala kotsika kwa matope odziyimira pawokha komanso odzipangira okha konkire okhala ndi zofunikira zapamwamba zamadzimadzi. Komanso, thickening zotsatira za mapadi ether kuonjezera chofunika madzi pa zipangizo simenti, motero kuonjezera linanena bungwe la matope. Kukhuthala kwa njira ya cellulose ether kumadalira kulemera kwa maselo (kapena digiri ya polymerization) ndi kuchuluka kwa cellulose ether, kutentha kwa yankho, kumeta ubweya, ndi njira yoyesera. Kukwera kwa digiri ya polymerization ya cellulose ether, kulemera kwake kwa maselo, kumapangitsanso kukhuthala kwake kwamadzimadzi; The apamwamba mlingo (kapena ndende) wa mapadi efa, ndi apamwamba mamasukidwe akayendedwe ake amadzimadzi njira, koma ntchito ayenera kulabadira kusankha yoyenera mlingo, kuti kusakaniza kwambiri, zimakhudza ntchito matope ndi konkire; Monga zakumwa zambiri, kukhuthala kwa cellulose ether solution kudzachepa ndi kuwonjezeka kwa kutentha, ndipo kuchuluka kwa cellulose ether kumapangitsanso kutentha; Ma cellulose ether solution nthawi zambiri amakhala thupi la pseudoplastic lomwe limameta ubweya wa ubweya. Kukwera kwa kumeta ubweya wa ubweya, kumachepetsa kukhuthala.

Choncho, kugwirizana kwa matope kudzachepetsedwa ndi mphamvu yakunja, yomwe imathandizira kumanga matope, kupanga matope kungakhale ndi ntchito yabwino komanso yogwirizana. Komabe, njira ya cellulose ether idzawonetsa makhalidwe a Newtonian madzimadzi pamene ndende imakhala yochepa kwambiri komanso kukhuthala kwake kumakhala kochepa kwambiri. Pamene ndende ikuwonjezeka, yankho limapereka mawonekedwe a pseudoplastic fluid, ndipo kumtunda kwa ndende, kumawonekera kwambiri pseudoplastic.