Ko te Hydroxyethyl cellulose (HEC) he mā, he kōwhai mārama rānei, kāore he kakara, he muka, he paura rānei, he totoka kore paitini. He mea hanga mai i ngā miro miro mata, i te penupenu kua whakamakukuhia rānei kua rumakina ki te 30% houra wai. I muri i te hawhe haora, ka tangohia mai, ka pēhia. Pēhia kia tae te ōwehenga o te wai kawakore ki te 1:2.8, kātahi ka kuru. Ka whakaritea mā te tauhohenga etherification, ā, nō roto i ngā ethers cellulose wairewa kore-ionic. He mea nui te Hydroxyethyl cellulose hei whakamātotoru i te peita rapa. Kia arotahi tātou ki te whakamahinga o te hydroxyethyl cellulose HEC i roto i te peita rapa me ngā mahi whakatūpato.
1. Kua rite ki te wai whaea hei whakamahi: tuatahi whakamahia te hydroxyethyl cellulose HEC hei whakarite i te wai whaea he nui ake te kukū, kātahi ka tāpirihia ki te hua. Ko te painga o tēnei tikanga he nui ake te ngāwari, ā, ka taea te tāpiri tika ki te hua kua oti, engari me penapena tika. He rite ngā mahi o tēnei tikanga ki te nuinga o ngā mahi i roto i te tikanga 2; ko te rerekētanga kāore he hiahia mō te kaiwhakaoho kutikuti teitei, ā, ko ētahi kaiwhakaoho anake he nui te kaha hei pupuri i te hydroxyethyl cellulose kia marara noa i roto i te otinga ka taea te haere tonu me te kore e mutu te whakaoho kia memeha katoa ki roto i te otinga matotoru. Heoi, me mōhio me tāpiri wawe te harore ki te wai whaea.
2. Tāpirihia tika i te wā e hangaia ana: ko tēnei tikanga te mea māmā rawa, ā, ko te wā poto rawa. Tāpirihia he wai ma ki roto i tētahi peere nui kua rite ki tētahi mīhini kutikuti teitei. Tīmata ki te whakaoho tonu i te tere iti, ā, āta tātarihia te hydroxyethyl cellulose ki roto i te wairewa kia ōrite. Me whakaoho tonu kia mākū katoa ngā matūriki. Kātahi ka tāpirihia ngā mea tiaki me ngā momo tāpiri. Pēnei i ngā tae, ngā āwhina whakamarara, te wai haukini, me ētahi atu. Whakaohokia kia memeha rawa te hydroxyethyl cellulose HEC katoa (ka piki ake te matotoru o te wairewa) kātahi ka tāpirihia ētahi atu wāhanga ki te tauira mō te tauhohenga.
I te mea he paura, he totoka muka rānei te HEC hydroxyethyl cellulose i tukatukahia ki te mata, me aro ki ngā āhuatanga e whai ake nei i te wā e whakarite ana i te wai whaea hydroxyethyl cellulose:
(1) Ina whakamahia te HEC hydroxyethyl cellulose matotoru-teitei, kaua te kukū o te wai matua e neke ake i te 2.5-3% (mā te taumaha), ki te kore ka uaua te whakahaere i te wai matua.
(2) I mua atu, ā, i muri i te tāpiri i te hydroxyethyl cellulose HEC, me whakaoho tonu kia mārama rawa te otinga.
(3) Tāpirihia he rongoā harore i mua i te wā e taea ai.
(4) He mārama te hononga o te pāmahana wai me te uara pH o te wai ki te whakarewanga o te hydroxyethyl cellulose, nō reira me aro nui atu.
(5) Kaua e tāpirihia ētahi matū kawakore ki te ranunga i mua i te whakamakukuhia o te paura hydroxyethyl cellulose ki te wai. Mā te whakanui ake i te pH i muri i te whakamakuku ka āwhina i te memeha.
(6) Me āta tātari ki roto i te tāke whakaranu, kaua hoki e tāpirihia he nui rawa, kaua hoki e tāpiri tika i te hydroxyethyl cellulose kua hanga hei puranga me te pōro ki roto i te tāke whakaranu.
Ngā mea nui e pā ana ki te matotoru o te peita rapa:
(1) Te waikura o te whakamātotoru e ngā moroiti.
(2) I roto i te tukanga hanga peita, mehemea he tika te raupapa taahiraa o te tāpiri i te whakamātotoru.
(3) Mēnā he tika te nui o te whakaoho mata me te wai i whakamahia i roto i te tauira peita.
(4) Te ōwehenga o te nui o ētahi atu matū whakamātotoru taiao ki te nui o te hydroxyethyl cellulose i roto i te hanganga peita.
(5) Ina hangaia te rapa, ka iti haere te nui o ngā matū whakakorikori me ētahi atu waikura.
(6) He tino teitei rawa te pāmahana i te wā e horapa ana nā te nui rawa o te whakaoho.
(7) Ka nui ake ngā mirumiru hau e toe ana i roto i te peita, ka nui ake te matotoru.
Ka paku rerekē te matotoru o te hydroxyethyl cellulose HEC i te awhe pH o te 2-12, engari ka heke te matotoru ki tua atu i tēnei awhe. Kei a ia ngā āhuatanga o te whakamātotoru, te whakatārewatanga, te here, te whakaemulsifying, te horapa, te pupuri i te makuku me te tiaki i te colloid. Ka taea te whakarite i ngā otinga i roto i ngā awhe matotoru rerekē. Kāore e pumau i raro i te pāmahana me te pēhanga noa, ka karo i te haumākū, te wera, me te pāmahana teitei, ā, he tino pai te wairewa tote ki ngā dielectrics, ā, ka whakaaetia tōna otinga wai kia mau ki ngā kukū tote teitei, ā, ka noho pumau tonu.
Wā tuku: Paenga-whāwhā-01-2023