I. Kupu Whakataki
Ko te Hydroxyethyl Cellulose (HEC) he pūhui wai-rewa kore-ionic e whakamahia whānuitia ana i roto i te tango hinu, te paninga, te hanga, ngā matū o ia rā, te hanga pepa me ētahi atu mara. Ka whiwhihia te HEC mā te whakarerekētanga matū o te cellulose, ā, ko ōna āhuatanga me āna whakamahinga ka whakatauhia e ngā whakakapinga hydroxyethyl i runga i ngā ngota cellulose.
II. Te tukanga whakaputa
Ko te tukanga whakaputa o te HEC ko ngā mahi matua e whai ake nei: te whakaeteretanga o te cellulose, te horoi, te whakamaroke, te whakamaroke me te huri. E whai ake nei he whakataki taipitopito mō ia mahi:
Te whakapūmautanga o te cellulose
Ka tukatukahia te cellulose ki te kawakore i te tuatahi hei hanga i te cellulose kawakore (Cellulose Alkali). Ko te tikanga o tēnei tukanga ka mahia i roto i tētahi tauhohenga, mā te whakamahi i te otinga hauwai konutai hei tukatuka i te cellulose tūturu hei hanga i te cellulose kawakore. Ko te tauhohenga matū e whai ake nei:
Pūtau-OH+NaOH→Cell-O-Na+H2OCell-OH+NaOH→Cell-O-Na+H 2O
Kātahi ka tauhohe te cellulose alkali ki te ethylene oxide hei hanga i te hydroxyethyl cellulose. Ka mahia te tauhohenga i raro i te pēhanga teitei, ko te tikanga 30-100°C, ā, ko te tauhohenga motuhake koia tēnei:
Pūtau-O-Na+CH2CH2O→Cell-O-CH2CH2OHCell-O-Na+CH 2CH 2O→Cell-O-CH 2CH 2OH
Me whakahaere tika te pāmahana, te pēhanga me te nui o te waikura etilena i tāpirihia mō tēnei tauhohenga hei whakarite i te ōritetanga me te kounga o te hua.
Te horoi
Ko te hua o te HEC mata he kawakore kāore i tauhohe, he waikura etilena me ētahi atu hua taha, me tango atu ēnei mā te horoinga wai maha, mā te horoinga whakarewa waro rānei. He nui te wai e hiahiatia ana i te wā e horoia ana te wai, ā, me tukatuka, me tuku te wai para i muri i te horoinga.
Te maroketanga
Me whakamaroke te HEC mākū i muri i te horoinga, mā te tātari korehau, mā te wehenga porotītaha rānei hei whakaiti i te nui o te makuku.
Te whakamaroke
Ka whakamaroketia te HEC kua maroke, mā te whakamaroke rehu, mā te whakamaroke tere rānei. Me tino whakahaere te pāmahana me te wā i te wā whakamaroke kia kore ai e memeha, e haaputuputu rānei i te pāmahana tiketike.
Te huri
Me huri te poraka HEC maroke, me tātari kia ōrite te rahi o te matūriki, ā, hei mutunga, ka hanga he paura, he kirikiri rānei.
III. Ngā āhuatanga mahi
Te wairewatanga o te wai
He pai te wairewatanga o te HEC ki te wai, ā, ka tere te wairewa ki te wai matao me te wai wera hei hanga i tētahi otinga mārama, mārama rānei. Nā tēnei āhuatanga wairewatanga ka whakamahia whānuitia hei whakamātotoru me te whakaū i roto i ngā paninga me ngā hua matū o ia rā.
Te whakamātotoru
He kaha te pānga matotoru o te HEC i roto i te wairewa, ā, ka piki ake tōna matotoru i te pikinga o te taumaha ngota. Mā tēnei āhuatanga matotoru ka taea e ia te whai wāhi ki te matotoru, te pupuri wai me te whakapai ake i te mahi hanga i roto i ngā paninga wai me ngā moata hanga.
Rheotanga
He āhuatanga rheological ahurei tō te wairewa HEC, ā, ka rerekē tōna matotoru i te huringa o te tere kutikuti, e whakaatu ana i te angiangi kutikuti, i te pseudoplasticity rānei. Mā tēnei āhuatanga rheological ka taea e ia te whakarite i te rere me te mahi hanga i roto i ngā paninga me ngā wai keri hinu.
Te whakaemulsification me te whakatārewatanga
He pai ngā āhuatanga whakaemulsification me te whakatārewatanga o te HEC, e taea ai te whakau i ngā matūriki i whakatārewatia, i ngā pata rānei i roto i te pūnaha marara hei ārai i te paparanga me te whakatō. Nō reira, he maha ngā wā ka whakamahia te HEC i roto i ngā hua pēnei i ngā paninga emulsion me ngā whakatārewatanga rongoā.
Te pirau o te koiora
He matū tūturu te HEC, he pai te pirau, kāore he parahanga ki te taiao, ā, e tutuki ana i ngā whakaritenga o te tiaki taiao matomato.
IV. Ngā Āpure Tono
Ngā paninga
I roto i ngā paninga wai, ka whakamahia te HEC hei whakamātotoru me te whakau hei whakapai ake i te rere, te mahi hanga me ngā āhuatanga ārai-totoka o ngā paninga.
Hanganga
I roto i ngā rauemi hanga, ka whakamahia te HEC ki roto i te moata sima me te paura putty hei whakapai ake i te mahi hanga me te pupuri wai.
Ngā Matū o Ia Rā
I roto i ngā hopi horoi, ngā hopi horoi makawe, me ngā paraihe niho, ka whakamahia te HEC hei whakamātotoru me te whakaū hei whakapai ake i te āhua me te pumau o te hua.
Ngā mara hinu
I roto i te keri hinu me ngā wai pakaru, ka whakamahia te HEC hei whakatika i te rheology me ngā āhuatanga whakatārewatanga o ngā wai keri, hei whakapai ake i te whai huatanga me te haumaru o te keri.
Te hanga pepa
I roto i te tukanga hanga pepa, ka whakamahia te HEC hei whakahaere i te rere o te penupenu me te whakapai ake i te ōritetanga me ngā āhuatanga o te mata o te pepa.
Kua whānuitia te whakamahinga o te Hydroxyethyl Cellulose (HEC) i roto i ngā mara ahumahi maha nā te mea he pai tōna wairewatanga ki te wai, he matotoru, he āhuatanga rheological, he āhuatanga emulsification me te whakatārewatanga, tae atu ki te pirau pai. He tino pakari te tukanga whakaputa. Mā roto i ngā mahi o te cellulose etherification, te horoi, te whakamaroke, te whakamaroke me te huri, ka taea te whakarite i ngā hua HEC me te mahi pumau me te kounga pai. I te heke mai, me te whakapai ake i ngā whakaritenga tiaki taiao me te whanaketanga o te hangarau, ka whānui ake ngā tūmanakohanga tono o te HEC.
Wā tuku: Hōngongoi-02-2024