Ko nga mahi a te cellulose ether i roto i te kumete: te pupuri i te wai, te whakanui ake i te whakakotahitanga, te matotoru, te pa ki te waa whakatuu, me nga taonga whakauru hau.Na enei ahuatanga, he whanui te waahi ki te hanga moata.
1. Ko te pupuri i te wai o te cellulose ether te ahuatanga tino nui ki te tono moata.
Ko nga mea matua e pa ana ki te pupuri i te wai o te cellulose ether: te pokey, te rahi matūriki, te inenga, te whakauru kaha, te reeti whakakore, te tikanga pupuri wai: ko te pupuri wai o te cellulose ether ake ka ahu mai i te memehatanga me te maroke o te cellulose ether ake.Ahakoa kei roto i te mekameka ngota cellulose te maha o nga roopu hydroxyl me te kaha o te hydration, kaore e memeha ki te wai.Ko tenei na te mea ko te hanganga cellulose he tohu teitei o te tioata, a, ko te kaha o te hydration o nga roopu hydroxyl anake e kore e ranea ki te whakangaro i nga hononga kaha o waenga.Ka kaha nga here hauwai me te van der Waals, na reira ka pupuhi noa engari karekau e memeha ki te wai.Ina whakaurua he whakakapinga ki roto i te mekameka ngota, ehara i te mea ko te whakakapi anake te wawahi i te here hauwai, engari ka pakaru ano te here hauwai i waenga na te herenga o te whakakapi i waenga i nga mekameka tata.Ko te nui ake o te whakakapi, ka nui ake te tawhiti i waenga i nga ngota ngota, e whakangaro ana i te awenga here hauwai.Ko te nui ake o te kurupae cellulose, ka uru mai te otinga i muri i te toronga o te reanga cellulose, a ko te cellulose ether ka wairewa-wai, ka hanga he otinga-nui.Ka piki ake te pāmahana, ka ngoikore te wai o te polymer, ka peia te wai i waenga i nga mekameka.I te wa e ranea ana te whakamaroketanga, ka timata nga ngota ngota ki te whakahiato, ka hanga i te hanganga whatunga ahu-toru me te rerenga wai.
(1) Te paanga o te rahi matūriki me te wa ranu o te cellulose ether ki te pupuri wai
Ki te rite te nui o te cellulose ether, ka piki ake te pupuri wai o te kumete ki te piki o te viscosity;ko te pikinga o te nui o te cellulose ether me te piki o te pokey ka piki ake te pupuri wai o te kumete.Ka nui ake te ihirangi o te cellulose ether ki te 0.3%, ka taurite te huringa o te pupuri wai moata.Ko te kaha pupuri wai o te kumete te nuinga e whakahaeretia ana e te wa rewa, ka tere ake te rewa o te etera cellulose pai ake, ka tere ake te kaha o te pupuri wai.
(2) Te awenga o te tohu o te etherification o te cellulose ether me te mahana ki te pupuri wai
Ka piki ake te pāmahana, ka heke te pupuri wai, ka piki ake te tohu o te etherification o te cellulose ether, ka pai ake te pupuri i te wai wera o te cellulose ether.I te wa e whakamahia ana, he iti ake te pāmahana o te kumete hou i konatunatua i te 35°C, a, i raro i nga ahuatanga o te rangi, ka eke pea te pāmahana ki te 40°C.I roto i tenei take, me whakatika te tauira me te kowhiri i te hua me te taumata teitei o te etherification.Arā, whakaarohia te whiriwhiri i te ether cellulose e tika ana.
2. Te paanga o te cellulose ether ki runga i te hau o te kumete
I roto i nga hua moata whakauru maroke, na te taapiri o te cellulose ether, ka whakaurua etahi mirumiru hau iti, riterite me te pumau ki roto i te moata whakauru hou.Na te kaha o te paoro o nga mirumiru o te hau, he pai te mahi a te moata me te whakaiti i te toronga o te moata.Ka pakaru me te whakaheke, me te whakanui ake i te tere o te putanga o te kumete.
3. Te awenga o te cellulose ether i runga i te hydration ciment
Ko te cellulose ether he whakamuri ki te whakamakuku o te kumete i runga i te ciment, a ka whakanuia te paanga whakamuri ki te pikinga o te ihirangi cellulose ether.Ko nga mea whakaawe o te cellulose ether i runga i te whakamakuku sima ko: te inenga, te tohu o te etherification, te momo ciment.
Wā tuku: Feb-02-2023