Metila Hauwaitoitirīti Hēroro (MHEC)He etera cellulose kore-ionic tēnei e whakamahia whānuitia ana i roto i ngā rauemi hanga, inā koa i roto i te moata mākū, ā, he mahi nui tāna. Nā tōna wairewatanga ki te wai me te hanganga ngota teitei ka hanga he otinga matotoru i roto i te wai, ka hoatu ki te moata ngā āhuatanga tukatuka pai rawa atu, te pupuri wai me te urutau ki te hanga.
1. Ngā āhuatanga taketake o te MHEC
He matū ether cellulose te MHEC i hangaia mā te whakauru i ngā rōpū methyl me te hydroxyethyl ki roto i te cellulose tūturu mā te tauhohenga etherification. He pai tōna wairewatanga wai, he āhua hanga kiriata, he pupuri wai me te piri. He pumau i raro i ngā āhuatanga kūpapa me te kawakore, ā, he pai tōna hototahitanga koiora me te haumaru taiao.
Ka wairewa te MHEC i roto i te wai matao i te pāmahana rūma hei hanga i tētahi otinga korori mārama, ā, kāore e wairewa i roto i te wai wera, i te nuinga rānei o ngā whakarewa waro. Ko tōna tukanga whakarewa he tukanga whānui-marara-whakarewa ā-tinana, ā, kāore e uru ki ngā tauhohenga matū.
2. Te tukanga whakarewa o te MHEC i roto i te moata mākū
I roto i te moata mākū, ka tāpirihia te MHEC ki te ranunga maroke hei paura, kātahi ka rewa mārire i te wā e tāpirihia ana te wai me te whakaoho:
Wāhanga tīmatanga – te mimiti me te pupuhi o te wai: Ka mimitihia e ngā matūriki MHEC te wai, ka pupuhi i runga i te mata i muri i te pā ki te wai, ka hanga he paninga tiēre.
Wāhanga waenga – te marara me te pupuhi: I te whakaohooho, ka whakangaromia tetahi wāhanga o te hanganga kōrori, ā, ka tīmata te marara o te MHEC ki roto i te pūnaha katoa.
Wāhanga whakamutunga – te whakarewanga katoa: Whai muri i te whakaoho tonu me te roanga o te wā, ka whakarewaina katoatia te MHEC hei hanga i tētahi otinga pūmua pumau, ka tohatoha ōrite ki roto i te moata.
I roto i ngā mahi whaihua, ka pāngia te tere whakarewa o te MHEC e te kaha o te whakaoho, te pāmahana wai, te rahi o te matūriki, me ētahi atu rauemi i roto i te tauira (pēnei i te sima, te gypsum, te onepu, me ētahi atu). Mā te whakahaere tika i ēnei tawhā ka taea te karo i te raruraru o te kohikohi, te whakarewanga kāore rānei i oti.
3. Nga mahi matua a MHEC i roto i te kumete maku
3.1. Whakapai ake i te pupuri wai
Ko te pānga nui o te MHEC ko te whakapai ake i te kaha pupuri wai o te moata, te whakaiti i te mimiti tere o te wai kore utu, te whakaroa i te wā tauhohenga wai o te sima, kia pai ake ai te kaha me te kaha o te piri, me te ārai i te pakaru wawe.
3.2. Whakapai ake i te mahi hanga
Nā te kaha whakahinuhinu me te matotoru o te MHEC, he pai te mahi, te ngāwari me te horapa o te moata, ka whakaiti i te uauatanga o te hanga me te whakapai ake i te whai huatanga. Ina koa i roto i te tukanga o te parai me te tāera, ka taea e ia te ārai i te hinganga me te paheke o te moata.
3.3. Whakapai ake i te mahi honohono
Mā te hanganga whatunga kōrori i hangaia e te MHEC i roto i te moata ka whakarei ake i te kaha here i waenga i te moata me te paparanga turanga, inā koa i te wā e hanga ana i runga i te mata poutū, i te mata o runga rānei, ka ārai i te taka o te moata, ka whakarei ake hoki i te pono o te hanganga.
3.4. Whakatikatika i te ōritetanga me te rere o te wai
Mā te whakarerekē i te nui o te MHEC, ka taea te whakahaere i te ōritetanga me te whanonga rheological o te moata mākū, kia tika ai te rere, he mea watea mō te hanganga, ā, kāore e pā ki te pānga o te whakapūtanga nā te nui rawa o te rere.
3.5. Whakapai ake i te mahi ārai-paheke
I roto i ngā whakamahinga pēnei i ngā piripiri taera me ngā moata here, ka taea e te MHEC te aukati i te paheke o te moata, te whakapai ake i te pumau o te tūnga o te hanganga, me te whakatutuki i ngā whakaritenga hanganga o te whakapiri poutū me ngā taera rahi.
4. Te pānga o te horopeta MHEC ki te mahi a te moata
Ko te nui o te MHEC e tāpirihia ana ka whakahaeretia i waenga i te 0.1% me te 0.5% (i runga i te nui katoa o ngā rauemi maroke). Ko ngā pānga o ngā horopeta rerekē ki te mahi a te moata koia ēnei:
Inenga iti (<0.1%): kua paku pai ake te pupuri wai, engari kāore i te kitea te whakapainga o te mahi hanga.
Inenga taurite (0.2%~0.4%): Te mahi tino pai, te whanaketanga taurite o te pupuri wai, te mahi hanga, me te kaha here.
Te whakamahinga nui rawa (>0.5%): Tērā pea ka matotoru rawa te moata, ka whakaiti i te rere o te wai, ka roa ake hoki te wā e whakamaroke ai.
Nō reira, i roto i te hoahoa tātai motuhake, me whakatau te nui o te tāpiri tino pai o te MHEC mā roto i ngā whakamātautau kia tutuki ai te pānga whakamahinga tino pai.
5. Te mahi tahi me ētahi atu tāpiringa
Ka taea te whakamahi i te MHEC me ngā momo tāpiri mahi maha, pēnei i:
Me te paura rapa ka taea te whakamarara anō (VAE): ka whakapai ake ngātahi i te ngāwari me te kaha piri o te moata;
Me ngā mea whakaroa: whakaroa i te makuku o te sima, mahi tahi me MHEC ki te whakapai ake i te matapihi hanga;
Me ngā whakakī/ngā kohuke: ka whakarite i te whanaketanga o te rere me te kaha, ka whakau i te hanganga o te moata.
Hei tāpiri mahi nui i roto i te moata mākū,He maha ngā mahi a te hydroxyethyl methylcellulose (MHEC) ki te whakamātotoru, te pupuri wai, te whakarei me te whakapai ake i te hanganga i roto i te pūnaha moata mā roto i ōna āhuatanga wairewa-wai pai. He tāpiri mahi-teitei tino nui i roto i ngā rauemi hanga hou. Mā te whiriwhiri pūtaiao i ngā tauira me ngā inenga, ka taea e te MHEC te whakapai ake i te mahi whānui o te moata, te whakatutuki i ngā hiahia o ngā āhuatanga hanganga rerekē, me te āwhina i te hanganga matomato me te whai hua.
Wā tuku: Pipiri-06-2025