Ko te tuatahi, ka kurua te cellulose mata rakau penupenu / miro parakore, ka kawakawahia ka purua ki raro i te mahi o te houra. Tāpirihia te waikura olefin (pērā i te ethylene oxide, te propylene oxide ranei) me te methyl chloride hei whakaetherification. Ka mutu, ka mahia te horoi me te purenga kia whiwhi ai i te mamethylcellulosepaura. Ko tenei paura, ina koa ko tana wairewa wai, he pai nga ahuatanga o te tinana. Ko te ether cellulose e whakamahia ana i roto i te ahumahi hanga he methyl hydroxyethyl cellulose ether ranei methyl hydroxypropyl cellulose (e kiia ana ko MHEC, MHPC ranei, he ingoa ngawari ake ranei MC). He mahi tino nui tenei hua i roto i te mara o te paru paura maroke. tūranga nui.
He aha te pupuri wai o te methyl cellulose ether (MC)?
Whakautu: Ko te taumata o te pupuri wai ko tetahi o nga tohu nui ki te ine i te kounga o te methyl cellulose ether, ina koa i roto i te hanga paparanga angiangi o te moata i runga i te ciment me te gypsum. Ma te kaha o te pupuri i te wai ka taea te aukati i te ahua o te ngaronga kaha me te pakaruhanga na te nui o te whakamaroke me te iti o te wai. Ko te pai o te pupuri i te wai o te methyl cellulose ether i raro i nga ahuatanga o te pāmahana teitei ko tetahi o nga tohu nui hei wehe i te mahi o te methyl cellulose ether. I raro i nga ahuatanga noa, ka heke te pupuri wai o te nuinga o te methyl cellulose ethers i te pikinga o te pāmahana. Ka piki ake te mahana ki te 40 ° C, ka tino heke te pupuri wai o te methyl cellulose ethers noa, he mea tino nui ki nga waahi wera me te maroke. A ko te hanga angiangi-papa i runga i te taha paki i te raumati ka whai paanga nui. Heoi, ko te kore o te pupuri i te wai ma te inenga teitei ka nui te pokey o te rauemi na te nui o te inenga, ka raru te hanga.
He mea tino nui te pupuri wai ki te arotau i te mahi whakapakeke o nga punaha whakaraera kohuke. I raro i te mahi a te cellulose ether, ka tukuna te makuku ki te paparanga turanga, ki te hau ranei mo te wa roa, na reira ka whakarite kia roa te wa o te mea cimentitious (ciment or gypsum) ki te taunekeneke ki te wai, ka whakapakeke haere.
He aha te mahi a te methyl cellulose ether i roto i te moata paura maroke?
Ko te methyl hydroxyethyl cellulose ether (MHEC) me te methyl hydroxypropyl cellulose ether (HPMC) e kiia ana ko te methyl cellulose ether.
I roto i te mara o te moata paura maroke, ko te methyl cellulose ether he mea nui kua whakarereketia mo te moata paura maroke penei i te raima moata, te raima raima, te whakapiri taera, te putty, nga mea whakakakau-whaiaro, te kumete rehu, te kapia pepapātū me te rauemi caulking. I roto i nga momo mota paura maroke, ko te methyl cellulose ether te nuinga o te mahi ki te pupuri i te wai me te matotoru.
Te wa tuku: Hanuere-09-2023