Ko te dispersing hydroxyethyl cellulose (HEC) he mahi e tika ana kia whai i nga waahanga motuhake, ina koa i roto i nga papaaho wai. Ko te tika o te whakamararatanga me te whakakorenga ka taea te whakarite i te painga o te whakamahinga. Ko te Hydroxyethyl cellulose e whakamahia nuitia ana i roto i te paninga, te whakapiri, te whakapaipai, te hinu hinu me etahi atu mara na te mea he matotoru, he pumau, he hanga kiriata, he whakamakuku me etahi atu mahi.
Whakataki ki te Hydroxyethyl Cellulose
Ko te Hydroxyethyl cellulose he wai-wairewa-kore-katote cellulose ether i hangaia e te whakarereketanga matū o te cellulose taiao. He pai rawa atu te whakarewatanga me te whakapakeke, a ka taea e ia te hanga i te wairewa wai maataata, kerekere. He pai hoki te here a HEC ki te wai tote, no reira he pai mo nga taiao wai moana, nga punaha tote ranei. I te wa ano, ka taea te noho pumau i runga i te whanui pH, kaore e pa ki nga taiao waikawa me te alkali.
Te parau tumu marara o te hydroxyethyl cellulose
I roto i te wai, te tukanga marara o te hydroxyethyl cellulose e rua nga kaupae matua: te whakamararatanga maku me te whakakorenga katoa.
Te marara makuku: Ko te tikanga tenei o te hanga matūriki hydroxyethyl cellulose kia rite te tohatoha ki te wai. Mēnā ka tāpirihia te HEC ki te wai, ka tere te mimiti i te wai, ka hangai he kapia ki runga i te mata, ka aukati i te rewa. Na reira, i te wa o te whakamararatanga, me karohia te hanga o aua putunga ka taea.
Te rewa katoa: I muri i te makuku, ka marara haere nga ngota ngota cellulose ki roto i te wai kia hanga he otinga rite. Ko te tikanga, ka memeha haere te HEC, ka roa pea he maha nga haora, ka roa ake ranei, i runga i te pāmahana wai, nga ahuatanga whakaoho me te rahi o te matūriki cellulose.
Nga hikoinga marara o te hydroxyethyl cellulose
Hei whakarite ka taea te marara o te hydroxyethyl cellulose, ko enei e whai ake nei ka whakamahia nga waahanga whakamararatanga:
1. Kōwhirihia te pāmahana wai tika
Ko te pāmahana wai he take nui e pa ana ki te marara me te whakakorenga o te hydroxyethyl cellulose. Ko te tikanga, ko te wai matao, ko te wai pāmahana rūma ranei te tino pai o te taiao memeha. Ko te wai mahana (e tata ana ki te 30-40°C) ka awhina ki te whakatere i te rewa, engari he nui rawa te pāmahana o te wai (neke atu i te 50°C) ka puta he kapoipoi i te wa o te whakakorenga, ka pa ki te paanga marara.
2. Te maimoatanga o mua i te makuku
Ko te Hydroxyethyl cellulose he tere ki te hanga kapoi ki roto i te wai, na reira ko te maimoatanga i mua i te makuku he tikanga whakamararatanga whai hua. Ma te ranu tuatahi i te HEC me te whakarewa pararopi wairewa-wai (pērā i te waihā, propylene glycol, me ētahi atu), ka makuku rite te HEC kia kore ai e mimiti te wai me te hanga kapo. Ka taea e tenei tikanga te whakapai ake i te pai o te whakamararatanga o muri mai.
3. Whakahaerehia te tere taapiri
I te wa e marara ana te hydroxyethyl cellulose, me ata ringihia te paura ki te wai i te wa e whakaohooho ana. Ko te tere o te whakakorikori kia kaua e teitei rawa kia kore ai e nui te hukahuka. Mena he tere rawa te tere o te taapiri, kare pea te HEC e tino marara, ka hanga he micelles koretake, ka pa ki te mahi whakakore i muri mai.
4. Whakakorikori
Ko te whakakorikori tetahi o nga tino mahi i roto i te mahi whakamararatanga. E taunaki ana kia whakamahia he whakaoho iti-tere ki te whakaoho tonu kia pai ai te tohatoha o te hydroxyethyl cellulose puta noa i te punaha wai. Ko te whakakorikori tere ka taea te whakahiato a HEC, te whakanui ake i te wa rewa, me te whakaputa mirumiru, ka pa ki te maaramatanga o te otinga. Ko te tikanga, me whakahaere te wa whakakorikori i waenga i te 30 meneti me etahi haora, i runga i nga taputapu e whakamahia ana me te pāmahana o te wai.
5. Tāpirihia nga electrolytes, whakatika ranei te pH
I etahi wa, ka taea te whakakorikori i te tukanga whakakore o te hydroxyethyl cellulose ma te taapiri i te nui o nga electrolytes (penei i te tote) me te whakatika ranei i te uara pH. Ko tenei tikanga he tino pai mo nga tono he nui nga whakaritenga mo te tere whakakore. Heoi, me ata whakatikatika te nui o te electrolyte, te pH ranei kia kore ai e pa ki te mahi a HEC.
Nga Raruraru noa me nga Whakataunga
Agglomeration: Ko te raruraru tino nui o te HEC ko te agglomeration i te wa o te tukanga whakakore, e arai ana ki te whakakorenga kore. Hei karo i tenei, ka taea e koe te whakamahi i te tikanga makuku i mua i te makuku, ka whakaranuhia ranei te HEC me etahi atu mea paura (pērā i te whakakī, te poaka, me ētahi atu) ka tāpirihia ki te wai.
Te tere rewa: Mēnā he pōturi te reiti rewa, ka taea e koe te tere te rewa ma te whakanui ake i te pai o te whakakorikori, te whakanui tika ranei i te pāmahana wai. I te wa ano, ka taea ano e koe te whakamahi i te HEC inamata, kua tino rongoatia kia tere te memeha i roto i te wa poto ake.
Raruraru mirumiru: He ngawari te hanga mirumiru i te wa e whakakorikori ana, e pa ana ki te maramatanga me te ine pokey o te otinga. I tenei keehi, ko te whakaiti i te tere o te whakaoho, te taapiri ranei i te nui o te kaihoko whakapouri ka taea te whakaiti i te hanganga o nga mirumiru.
Whakatupatotanga tono mo te hydroxyethyl cellulose
I roto i nga tono whaitake, me whiriwhiri te momo tika me te tikanga taapiri o te hydroxyethyl cellulose kia rite ki nga whakaritenga o nga punaha rereke. Hei tauira, i roto i te umanga whakakikorua, kaore i te whakamahia anake te hydroxyethyl cellulose hei kaitao, engari ka taea hoki te whakapai ake i te rheology, te hanga kiriata me te pupuri i te pumau o te paninga. I roto i te ahumahi hinu, he mea tino nui te tote o te HEC, na reira me whakatika te kowhiringa kia rite ki nga ahuatanga o raro.
Ko te whakamararatanga hydroxyethyl cellulose he mahi tino hangarau, a he mea tika ki te whiriwhiri i tetahi tikanga whakamararatanga e tika ana kia rite ki nga ahuatanga tono rereke. Ma te whakahaere i te pāmahana wai, te whakamakuku i mua i te makuku, te whakaoho tika me te taapiri i nga taapiri e tika ana, ka taea te whakarite kia marara te hydroxyethyl cellulose me te tino rewa ki roto i te wai, na reira ka whakanui ake i nga mahi whakapakeke me te whakapumau.
Te wa tuku: Oketopa-23-2024