1. Rauemi mata o te cellulose ether
Ko te cellulose ether mō te hanga he pūmua wai-rewa kore-ionic, ko tōna pūtake ko:
Te cellulose (te penupenu rakau, te miro rānei), ngā hauwaiwaro halogenated (methane chloride, ethyl chloride, ētahi atu halide mekameka roa rānei), ngā matū epoxy (ethylene oxide, propylene oxide, me ētahi atu)
HPMC-Hairokiroporoporo Mīro Hūrou Etera
HEC-Hydroxyethyl Cellulose Ether
HEMC-Haurokēti Etera Mīro Hūrouira
EHEC-Ethyl Hydroxyethyl Cellulose Ether
MC-methyl cellulose ether
2. Ngā āhuatanga o te cellulose ether
Ko ngā āhuatanga o ngā etera cellulose e whakawhirinaki ana ki:
Te tohu whakapūhui DP Te maha o ngā waeine hukahuka—te matotoru
Ngā whakakapinga me tō rātou taumata whakakapinga, taumata ōritetanga o te whakakapinga —- te whakatau i te mara tono
Rahi Matūriki—-Wairewatanga
Te maimoatanga mata (arā, te whakaroa i te whakarewatanga) - e pā ana te wā matotoru ki te uara pH o te pūnaha
Te tohu whakarerekētanga — Whakapai ake i te ātete totohu me te kaha mahi o te cellulose ether.
3. Te mahi a te cellulose ether – te pupuri wai
He mekameka pūmua te cellulose ether e titoa ana i ngā waeine β-D-glucose. Ko te rōpū hydroxyl i roto i te ngota me te ngota hāora i runga i te here ether ka hanga he here hauwai ki te ngota wai, ka mimiti i te ngota wai i runga i te mata o te mekameka pūmua ka whakararu i ngā ngota. I roto i te mekameka, ka whakaroa i te mimiti o te wai, ā, ka mimitihia e te paparanga turanga.
Ngā painga e whakaratohia ana e ngā āhuatanga pupuri wai o ngā cellulose ethers:
Kāore he take ki te whakamakuku i te paparanga turanga, e penapena ana i te tukanga
hanganga pai
kaha rawaka
4. Te mahi a te cellulose ether – te pānga whakamātotoru
Ka taea e te cellulose ether te whakanui ake i te piripono i waenga i ngā wāhanga o te moata gypsum, e kitea ana tēnei i roto i te pikinga ake o te matotoru o te moata.
Ko ngā painga matua o te whakamātotorutanga o ngā etera cellulose ko:
Whakaitihia te pungarehu whenua
Whakanuia te piri ki te turanga
Whakaitihia te totohu o te moata
kia ōrite te moata
5. Te tūranga o te cellulose ether – te mahi mata
Kei roto i te cellulose ether ngā rōpū hydrophilic (ngā rōpū hydroxyl, ngā here ether) me ngā rōpū hydrophobic (ngā rōpū methyl, ngā rōpū ethyl, ngā mowhiti glucose), ā, he surfactant.
(Ko te kukū o te mata o te wai he 72mN/m, ko te matū horoi he 30mN/m, ā, ko te cellulose ether he HPC 42, HPMC 50, MC 56, HEC 69, CMC 71mN/m)
Ko ngā painga matua e whakaratohia ana e te mahi mata o ngā etera cellulose ko:
Pānga hopu hau (waro maeneene, iti te mātotoru mākū, iti te ngāwari o te whakapūmau, ātete huka-rewa)
Te mākū (ka whakapiki i te piri ki te papa)
6. Ngā whakaritenga o te gypsum parai māmā mō te cellulose ether
(1). He pai te pupuri wai
(2). He pai te mahi, kāore e piri
(3). He maeneene te waru i te puranga
(4). Kaha te ārai i te totohu
(5). He teitei ake te pāmahana o te tiēre i te 75°C
(6). Te tere o te memeha
(7). He mea pai kia whai kaha ki te pupuri i te hau me te whakau i ngā mirumiru hau i roto i te moata.
11. Me pēhea te whakatau i te horopeta o te cellulose ether
Mō te whakapiripiri i ngā whakapiripiri, me pupuri te nui o te wai i roto i te moata mō te wā roa kia pai ai te mahi, kia kore ai hoki e pakaru te mata. I te wā anō, ka pupuri te cellulose ether i te nui o te wai e tika ana mō te wā roa kia pumau ai te tukanga whakapūmau o te moata.
Ko te nui o te cellulose ether e whakawhirinaki ana ki:
Te matotoru o te cellulose ether
Te tukanga whakaputa o te cellulose ether
Te Ihirangi Whakakapinga me te Tohatoha o te Cellulose Ether
Te Tohatoha Rahi Matūriki o te Cellulose Ether
Ngā momo me te hanganga o te moata gypsum
Te kaha mimiti wai o te paparanga turanga
Te Whakamahinga Wai mō te Horapa Paerewa o te Moata Gypsum
Te wā whakatakoto o te moata gypsum
Te matotoru o te hanganga me te mahi hanganga
Ngā āhuatanga hanga (pēnei i te pāmahana, te tere o te hau, me ētahi atu)
Tikanga hanga (waru ā-ringa, rehu ā-ringa)
Wā tuku: Hanuere-18-2023