1. Raw material of cellulose ether
Ko te cellulose ether mo te hanga he polymer kore-katote wai-wairewa ko tona puna ko:
Cellulose (te rakau penupenu, te miro miro ranei), te hauwai waro (methane chloride, ethyl chloride, me etahi atu halides mekameka-roa), pūhui epoxy (ethylene oxide, propylene oxide, etc.)
HPMC-Hydroxypropyl Methyl Cellulose Ether
HEC-Hydroxyethyl Cellulose Etera
HEMC-Hydroxyethyl Methyl Cellulose Etera
EHEC-Ethyl Hydroxyethyl Cellulose Ether
MC-methyl cellulose ether
2. Nga ahuatanga o te cellulose ether
Ko nga ahuatanga o te cellulose ethers e whakawhirinaki ana ki:
Te tohu polymerization DP Te maha o nga waeine huka—te pokey
Ko nga mea whakakapi me o raatau tohu whakakapinga, tohu o te riterite o te whakakapinga —- whakatauhia te waahi tono
Te Rahi Matūriki—-Te Whakarewa
Te maimoatanga o te mata (arā, te whakaroa whakaroa)—-e pa ana te wa poike ki te uara pH o te punaha
Tohu whakarerekētanga—-Whakapai ake i te aukati sag me te mahi o te cellulose ether.
3. Te mahi a te cellulose ether – te pupuri wai
Ko te cellulose ether he puhui mekameka waerau i titoa ki nga waeine β-D-glucose.Ko te roopu hydroxyl i roto i te ngota ngota me te ngota hāora i runga i te here ether ka hanga i te hononga hauwai ki te ngota ngota wai, ka whakapoipoi i te ngota ngota wai ki te mata o te mekameka waerau, ka whakararu i nga ngota ngota.I roto i te mekameka, ka whakaroa te whakaetonga o te wai, ka uru ki te paparanga turanga.
Ko nga painga e whakaratohia ana e nga waahi pupuri wai o te cellulose ethers:
Kaore he take ki te whakamakuku i te paparanga turanga, te whakaora i te tukanga
hanga pai
rawaka te kaha
4. Ko te mahi a te cellulose ether – te whakakaha
Ka taea e te cellulose ether te whakanui ake i te whakakotahitanga i waenga i nga waahanga o te moata i runga i te gypsum, e whakaatuhia ana i te piki ake o te rite o te moata.
Ko nga painga nui e whakaratohia ana e te whakamaroketanga o te cellulose ethers ko:
Whakaitihia te pungarehu whenua
Whakanuia te piri ki te turanga
Whakaitihia te paheketanga o te kumete
kia rite tonu te moata
5. Te mahi a te cellulose ether – te mahi mata
Kei roto i te cellulose ether he roopu hydrophilic (rōpū hydroxyl, here ether) me nga roopu hydrophobic (rōpū methyl, roopu ethyl, mowhiti huka) a he surfactant.
(Ko te mata o te wai he 72mN/m, ko te surfactant he 30mN/m, ko te cellulose ether he HPC 42, HPMC 50, MC 56, HEC 69, CMC 71mN/m)
Ko nga painga nui e whakaratohia ana e te mahi mata o te cellulose ethers ko:
Te awenga-a-rangi (he maeneene te wariu, he iti te kiato makuku, he iti te whakaraerae, he aatete whakatio-rewa)
Te makuku (ka piki te piri ki te tïpako)
6. Nga whakaritenga mo te raima raima marama mo te cellulose ether
(1).He pai te pupuri wai
(2).He pai te mahi, kaore he keke
(3).Maeneene te tango i te puranga
(4).He kaha ki te whakaheke
(5).He teitei ake i te 75°C te pāmahana reera
(6).Tere tere te rewa
(7).He pai ake te kaha ki te whakauru i te hau me te whakau i nga mirumiru hau i roto i te kumete
11. Me pehea te whakatau i te inenga o te cellulose ether
Mo te raima raima, he mea tika kia nui te wai i roto i te kumete mo te wa roa kia pai ai te mahi me te karo i nga kapiti mata.I te wa ano, ka pupuri te cellulose ether i te nui o te wai e tika ana mo te wa roa kia pai ai te whakamaarama o te kumete.
Ko te nui o te cellulose ether e whakawhirinaki ana ki:
Viscosity o te cellulose ether
Ko te tukanga whakaputa o te cellulose ether
Ihirangi whakakapi me te tohatoha o te Cellulose Ether
Te Tohatoha Rahi Matūriki o te Cellulose Ether
Nga momo me te hanganga o te moata-a-gypsum
Ko te kaha o te whakauru wai o te paparanga turanga
Te Whakapau Wai mo te Whakawhanaunga Paerewa o te Moata-a-Gypsum
Te wa whakarite mo te moata gypsum-based
Te matotoru o te hanga me te mahi hanga
Nga tikanga hanga (penei i te mahana, te tere o te hau, me etahi atu)
Tikanga hanga (te wiriwiri a-ringa, te rehu miihini)
Te wa tuku: Hanuere-18-2023