I roto i ngā hanganga peita, ko te hydroxyethyl cellulose (HEC) he mea whakamātotoru noa me te whakarerekē rheology ka taea te whakapai ake i te pumau rokiroki, te whakataurite me ngā āhuatanga hanganga o ngā peita. Hei tāpiri i te hydroxyethyl cellulose ki ngā peita, me te whakarite kia whai hua tana mahi, me whai i ētahi mahi me ngā whakatūpato. Ko te tukanga motuhake koia tēnei:
1. Ngā āhuatanga o te hydroxyethyl cellulose
He pūmua wai-wai kore-ionic te Hydroxyethyl cellulose, ā, he pai rawa atu ōna āhuatanga whakamātotoru, hanga kiriata, pupuri wai, whakatārewatanga me te whakaemulsifying. He mea whakamahi noa i roto i ngā peita wai, ngā piripiri, ngā uku, ngā waituhi me ētahi atu hua. Ka whiwhi mā te whakakapi i tētahi wāhanga o ngā rōpū hydroxyl i runga i te mekameka ngota cellulose ki ngā rōpū hydroxyethyl, nō reira he pai tōna wairewatanga ki te wai.
Ko ngā mahi matua a HEC i roto i ngā peita ko:
Pānga whakamātotoru: Ka whakanui ake i te matotoru o te peita, ka ārai i te peita kei totohu, ā, ka whai āhuatanga hanga pai rawa atu.
Pānga whakatārewatanga: Ka taea e ia te horapa ōrite me te whakau i ngā matūriki totoka pēnei i ngā tae me ngā whakakī kia kore ai e tau.
Pānga pupuri wai: Whakarei ake i te pupuri wai o te kiriata paninga, whakaroa i te wā tuwhera, me te whakapai ake i te pānga mākū o te peita.
Whakahaere rheology: whakatikatika i te rere me te whakataurite o te paninga, me te whakapai ake i te raru tohu paraihe i te wa e hanga ana.
2. Ngā taahiraa tāpiri o te hydroxyethyl cellulose
Te taahiraa i mua i te whakarewatanga I roto i te mahi tūturu, me horapa ōrite te hydroxyethyl cellulose, ā, me whakarewa mā te tukanga i mua i te whakarewatanga. Hei whakarite kia tino whai hua te cellulose, he mea pai kia whakarewahia ki te wai i te tuatahi, kaua e tāpiri tika ki te paninga. Ko ngā taahiraa motuhake koia ēnei:
Kōwhiria he whakarewa e tika ana: ko te wai whakakore iona te tikanga e whakamahia ana hei whakarewa. Mena he atu whakarewa waro kei roto i te pūnaha paninga, me whakarerekē ngā āhuatanga whakarewa kia rite ki ngā āhuatanga o te whakarewa.
Tauhiuhia mārire te paura hydroxyethyl cellulose: Tauhiuhia mārire, kia ōrite hoki te paura hydroxyethyl cellulose i a koe e whakaoho ana i te wai kia kore ai e haaputuputu. Me āta whakaoho kia kore ai e whakaroa te tere whakarewa o te cellulose, e hanga rānei i ngā "colloids" nā te kaha kutikuti nui rawa.
Te whakarewatanga tū: Whai muri i te tauhiuhi i te hydroxyethyl cellulose, me waiho kia tū mō tētahi wā (mai i te 30 meneti ki ētahi haora) kia tino pupuhi te cellulose, kia rewa hoki ki te wai. Ko te wā whakarewatanga e whakawhirinaki ana ki te momo cellulose, te pāmahana whakarewa me ngā āhuatanga whakaoho.
Whakatikatika i te pāmahana whakarewa: Mā te whakanui ake i te pāmahana ka tere ake te tukanga whakarewa o te hydroxyethyl cellulose. E taunakihia ana kia whakahaeretia te pāmahana o te otinga i waenga i te 20℃-40℃. Mā te pāmahana teitei rawa ka pakaru te cellulose, ka kino rānei te otinga.
Te Whakatikatika i te pH o te Wairewa He hononga tata te wairewatanga o te hydroxyethyl cellulose ki te pH o te wairewa. He pai ake te wairewa i raro i ngā āhuatanga kūpapa, paku kawakore rānei, me te pH i waenga i te 6-8. I te wā o te wairewatanga, ka taea te whakatika i te pH mā te tāpiri i te haukini, i ētahi atu matū kawakore rānei e hiahiatia ana.
Te tāpiri i te otinga hydroxyethyl cellulose ki te pūnaha paninga Whai muri i te whakarewanga, tāpirihia te otinga ki te paninga. I te wā e tāpirihia ana, me tāpiri āta, me te whakaoho tonu kia pai ai te whakaranu ki te anga paninga. I te wā e whakaranua ana, me whiriwhiri he tere whakaoho e tika ana kia rite ki ngā pūnaha rerekē hei ārai i te huka o te pūnaha, i te pirau rānei o te cellulose nā te kaha kutikuti nui rawa.
Te Whakatikatika i te Matotoru I muri i te tāpiri i te hydroxyethyl cellulose, ka taea te whakahaere i te matotoru o te paninga mā te whakatikatika i te nui o te mea i tāpirihia. Ko te tikanga, ko te nui o te hydroxyethyl cellulose e whakamahia ana kei waenga i te 0.3%-1.0% (e pā ana ki te taumaha katoa o te paninga), ā, me whakatikatika te nui motuhake i tāpirihia mā te whakamātautau kia rite ki ngā whakaritenga whakatakotoranga o te paninga. Ki te nui rawa te nui o te tāpiri ka nui rawa te matotoru o te paninga, ā, ka ngoikore te rere, ka pā ki te mahi hanga; engari ki te kore e ranea te tāpiri, kāore pea e taea te mahi hei whakamātotoru me te whakatārewatanga.
Whakahaerehia ngā whakamātautau taurite me te pumau rokiroki. Whai muri i te tāpiri i te hydroxyethyl cellulose me te whakarerekē i te tauira paninga, me whakamātautau te mahi hanganga paninga, tae atu ki te taurite, te totohu, te whakahaere tohu paraihe, me ētahi atu. I taua wā anō, me whai whakamātautau pumau rokiroki paninga hei tirotiro i te whakatōnga o te paninga i muri i te tūnga mō tētahi wā, te huringa matotoru, me ētahi atu, hei aromatawai i te pumau o te hydroxyethyl cellulose.
3. Ngā Whakatūpato
Ārai i te kohikohinga: I te wā e whakarewahia ana, he tino ngāwari te mimiti i te wai me te pupuhi o te hydroxyethyl cellulose, nō reira me tauhiuhi mārire ki roto i te wai, me te whakarite kia nui te whakaoho kia kore ai e puta he puranga. He hononga matua tēnei i roto i te mahi, ki te kore ka pā ki te tere whakarewa me te ōritetanga.
Āraia te kaha kutikuti nui: I te wā e tāpirihia ana te cellulose, kaua e tino tere te whakaoho kia kore ai e pakaru te mekameka ngota cellulose nā te kaha kutikuti nui rawa, ka heke ai tōna mahi matotoru. Hei tāpiri, i roto i te whakaputanga paninga o muri mai, me karohia hoki te whakamahi i ngā taputapu kutikuti nui i ngā wā katoa e taea ana.
Whakahaerehia te pāmahana whakarewa: I te whakarewatanga o te hydroxyethyl cellulose, kaua e tino teitei te pāmahana o te wai. Ko te tikanga kia whakahaeretia i te 20℃-40℃. I raro i ngā āhuatanga pāmahana teitei, ka pirau pea te cellulose, ka heke te pānga matotoru me te matotoru.
Te rokiroki otinga: Ko ngā otinga Hydroxyethyl cellulose me whakarite me te whakamahi tonu. Ka pā te rokiroki roa ki tōna matotoru me te pumau. Ko te tikanga me whakarite te otinga e hiahiatia ana i te rā e hangaia ai te peita kia mau tonu ai tōna mahi tino pai.
Ehara i te mea he tukanga whakaranu tinana ngāwari noa te tāpiri o te hydroxyethyl cellulose ki te peita, engari me hono atu hoki ki ngā whakaritenga tukanga me ngā whakaritenga whakahaere kia tino whakamahia ai ōna āhuatanga matotoru, whakatārewatanga me te pupuri wai. I te wā o te tukanga tāpiri, kia aro ki te taahiraa i mua i te whakarewatanga, te whakahaere i te pāmahana whakarewatanga me te uara pH, me te whakaranu katoa i muri i te tāpiri. Ka pā tika ēnei taipitopito ki te kounga me te pumau o te mahi o te peita.
Wā tuku: Hepetema-19-2024