Me pai te hototahi o ngā whakamātotoru mō ngā peita rapa ki ngā matū polymer rapa, ki te kore ka iti noa te kakano i roto i te kiriata paninga, ā, ka puta he whakakotahitanga matūriki kore e taea te whakakore, ka heke te matotoru me te rahi matūriki matotoru. Ka whakarerekē ngā whakamātotoru i te utu o te emulsion. Hei tauira, ka pā kino ngā whakamātotoru cationic ki ngā emulsifier anionic, ā, ka puta te demulsification. Me whai i ngā āhuatanga e whai ake nei te whakamātotoru peita rapa tino pai:
1. Iti te horopeta me te matotoru pai
2. He pai te pumau o te rokiroki, kāore e whakaiti i te matotoru nā te mahi a ngā whākōkī, ā, kāore e whakaiti i te matotoru nā ngā huringa o te pāmahana me te uara pH
3. He pai te pupuri wai, kāore he mirumiru hau e kitea ana
4. Kāore he pānga taha ki ngā āhuatanga o te kiriata peita pērā i te ātete ki te mirimiri, te kanapa, te kaha huna me te ātete wai
5. Kāore he turuturu o ngā tae
He mea nui te hangarau whakamātotoru o te peita rapa hei whakapai ake i te kounga o te rapa me te whakaiti i ngā utu. He mea tino pai te Hydroxyethyl cellulose hei whakamātotoru, he maha ngā pānga ki te whakamātotoru, te whakaū me te whakatikatika i te reo o te peita rapa.
I roto i te tukanga whakaputa peita rapa, ka whakamahia te hydroxyethyl cellulose (HEC) hei whakamarara, hei whakamātotoru, hei whakatārewatanga tae hei whakau i te matotoru o te hua, hei whakaiti i te whakakotahitanga, hei whakangawari i te kiriata peita, hei whakau ake i te roa o te peita rapa. He pai te rheology, ka taea te tu atu ki te kaha kutikuti teitei, ā, ka taea te whakarato i te taumata pai, te ātete ki te rakuraku me te ōritetanga o te tae. I taua wā anō, he tino pai te mahi a te HEC, ā, he pseudoplasticity te peita rapa kua whakamātotoruhia ki te HEC, nō reira he painga o te paraihe, te hurihuri, te whakakī, te rehu me ētahi atu tikanga hanga ki te penapena mahi, kāore e ngāwari ki te horoi, ki te totohu, ā, he iti ake te tauhiuhi. He tino pai te whanaketanga tae o te HEC. He tino pai te whakauru ki te nuinga o ngā tae me ngā here, e pai ai te ōritetanga me te pumau o te tae o te peita rapa. He maha ngā whakamahinga mō ngā hanganga, he ether kore-ionic. Nō reira, ka taea te whakamahi i roto i te whānuitanga pH whānui (2~12), ā, ka taea te whakaranu ki ngā wāhanga o te peita rapa whānui pērā i ngā tae tauhohe, ngā tāpiri, ngā tote wairewa, ngā electrolytes rānei.
Kāore he pānga kino ki te kiriata paninga, nā te mea he mārama ngā āhuatanga o te wairewa HEC wai i te mata o te wai, kāore e ngāwari te pahuka i te wā e hangaia ana, e hangaia ana hoki, ā, he iti ake te āhua o ngā kōhao puia me ngā kōhao iti.
He pai te pumau o te penapena. I te wā e penapena ana mō te wā roa, ka taea te pupuri i te horapa me te whakatarewa o te tae, ā, kāore he raruraru o te tae mānu me te puāwai. He iti noa te paparanga wai i runga i te mata o te peita, ā, ina nui te rerekētanga o te pāmahana rokiroki. He pumau tonu tōna matotoru.
Ka taea e te HEC te whakanui ake i te uara PVC (te kukū o te rahinga tae) o te hanganga totoka ki te 50-60%. Hei tāpiri, ka taea hoki te whakamahi i te HEC hei whakamātotoru i te paninga mata o te peita wai.
I tēnei wā, ko ngā whakamātotoru e whakamahia ana i roto i ngā peita rapa kounga-rahi me te kounga-waenga o te whare he whakamātotoru HEC me te polymer kiriaku (tae atu ki te polyacrylate, homopolymer, copolymer emulsion rānei o te waikawa kiriaku me te waikawa methacrylic) mai i tāwāhi.
Ka taea te whakamahi i te Hydroxyethyl cellulose mō
1. Hei whakapiripiri whakamarara, hei whakapiripiri tiaki rānei
Ko te tikanga, ka whakamahia te HEC me te matotoru o te 10-30mPaS. Ko te HEC ka taea te whakamahi tae atu ki te 300mPa·S ka pai ake te pānga marara mena ka whakamahia tahi me ngā surfactants anionic, cationic rānei. Ko te horopeta tohutoro ko te 0.05% o te papatipu monomer.
2. Hei whakamātotoru
Whakamahia te 15000mPa. Ko te horopeta tohutoro o te HEC matotoru teitei i runga ake i te s ko te 0.5-1% o te taumaha katoa o te peita rapa, ā, ka taea e te uara PVC te eke ki te 60%. Mā te whakamahi i te HEC o te 20Pa,s i roto i te peita rapa, ko te mahi pai rawa atu o te peita rapa. He iti ake te utu o te whakamahi noa i te HEC i runga ake i te 30000Pa.s. Heoi, kāore i te pai ngā āhuatanga whakataurite o te peita rapa. Mai i te tirohanga o ngā whakaritenga kounga me te whakaiti utu, he pai ake te whakamahi tahi i te HEC matotoru reo me te HEC matotoru teitei.
3. Te tikanga whakaranu i te peita rapa
Ka taea te tāpiri i te HEC kua maimoatia ki te mata hei paura maroke, hei whakapiri rānei. Ka tāpirihia tika te paura maroke ki te huri tae. Me 7, kia iti iho rānei te pH i te pūwāhi whāngai. Ka taea te tāpiri i ngā wāhanga kawakore pērā i te Yanbian dispersant i muri i te whakamakuku me te whakamarara katoa o te HEC. Me whakaranu ngā paru i hangaia ki te HEC ki roto i te paru i mua i te wā e ranea ai te HEC ki te whakamakuku me te tuku kia matotoru ki tētahi āhua kāore e taea te whakamahi. Ka taea hoki te whakarite i te penupenu HEC me ngā kaihoko whakakotahi ethylene glycol.
4. Ārai-pokepokea o te peita rapa
Ka pirau te HEC wairewa-wai ina pā atu ki ngā pokepokea ai he pānga motuhake ki te cellulose me ōna hua. Kāore e ranea te tāpiri noa i ngā mea tiaki ki te peita, me kore he whākōkī i ngā wāhanga katoa. Me pupuri kia ma te waka hanga peita rapa, ā, me horoi tonu ngā taputapu katoa ki te wairewa 0.5% formalin, 0.1% mercury rānei.
Wā tuku: Hakihea-26-2022