Te pānga matotoru ote etera cellulosee whakawhirinaki ana ki: te nui o te whakapūhui o te cellulose ether, te kukū o te otinga, te tere kutikuti, te pāmahana me ētahi atu āhuatanga. He ahurei te āhuatanga whakapūhui o te otinga ki te alkyl cellulose me ōna hua kua whakarerekētia. E pā ana ngā āhuatanga whakapūhui ki te nui o te whakakapinga, te kukū o te otinga me ngā tāpiringa. Mō ngā hua kua whakarerekētia te hydroxyalkyl, e pā ana hoki ngā āhuatanga o te gel ki te nui o te whakarerekētanga o te hydroxyalkyl. Mō te MC matotoru iti me te HPMC, ka taea te whakarite i te otinga 10%-15%, ka taea te whakarite i te MC matotoru reo me te HPMC i te otinga 5%-10%, ā, ka taea e te MC matotoru teitei me te HPMC te whakarite i te otinga 2%-3% anake, ā, ko te tikanga ka whakarōpūhia te whakarōpūtanga matotoru o te cellulose ether ki te otinga 1%-2%.
He nui te whai huatanga o te cellulose ether taumaha-ngota teitei ki te whakamātotoru, ā, he rerekē ngā matotorutanga o ngā polymer he rerekē ngā taumaha-ngota i roto i te otinga kukū kotahi. Ka taea anake te whakatutuki i te matotorutanga whainga mā te tāpiri i te nui o te cellulose ether taumaha-ngota iti. Kāore tōna matotorutanga e whakawhirinaki ana ki te tere kutikuti, ā, ka eke te matotorutanga teitei ki te matotorutanga whainga, me te iti ake o te tāpiri, ā, ka whakawhirinaki te matotorutanga ki te whai huatanga whakamātotoru. Nō reira, kia tutuki ai he ōritetanga, me whakapūmau he nui o te cellulose ether (te kukū o te otinga) me te matotorutanga otinga. Ka heke hoki te pāmahana tiēre o te otinga i te taha rārangi me te pikinga o te kukū o te otinga, ā, ka tiēre i te pāmahana rūma i muri i te taenga ki tētahi kukū. He teitei te kukū tiēre o te HPMC i te pāmahana rūma.
Ka taea hoki te whakarite i te ōritetanga mā te whiriwhiri i te rahi o te matūriki me te whiriwhiri i ngā etera cellulose me ngā nekehanga whakarerekētanga rerekē. Ko te mea e kiia nei ko te whakarerekētanga ko te whakauru i tētahi taumata o te whakakapinga o ngā rōpū hydroxyalkyl ki te hanganga angaanga o te MC. Mā te whakarerekē i ngā uara whakakapinga whanaunga o ngā whakakapinga e rua, arā, ko ngā uara whakakapinga whanaunga DS me MS o ngā rōpū methoxy me hydroxyalkyl e kīia pinepinetia ana e tātou. Ka taea te whiwhi i ngā whakaritenga mahi rerekē o te etera cellulose mā te whakarerekē i ngā uara whakakapinga whanaunga o ngā whakakapinga e rua.
He nui te thixotropy o te wairewa wai cellulose ether matotoru-teitei, he āhuatanga nui anō hoki tēnei o te cellulose ether. Ko ngā wairewa wai o ngā polymer MC he maha ngā wā he pseudoplastic me te non-thixotropic fluidity i raro iho i te pāmahana gel, engari ko ngā āhuatanga rere Newtonian i ngā tere kutikuti iti. Ka piki ake te pseudoplasticity me te taumaha ngota, te kukū rānei o te cellulose ether, ahakoa te momo whakakapinga me te nui o te whakakapinga. Nō reira, ko ngā cellulose ether o te taumata matotoru ōrite, ahakoa MC, HPMC, HEMC, ka whakaatu tonu i ngā āhuatanga rheological ōrite mena ka mau tonu te kukū me te pāmahana. Ka hangaia ngā gel hanganga ina piki ake te pāmahana, ā, ka puta ngā rerenga tino thixotropic. Ko ngā cellulose ether kukū teitei me te matotoru iti e whakaatu ana i te thixotropy ahakoa i raro iho i te pāmahana gel. He tino painga tēnei āhuatanga ki te whakatikatika i te whakataurite me te whakaheke i roto i te hanganga o te moata hanga whare.
Me whakamārama i konei ko te teitei ake o te matotoru ote etera cellulose, ka pai ake te pupuri wai, engari ka teitei ake te matotoru, ka teitei ake te taumaha ngota whanaunga o te cellulose ether, ā, ka heke te wairewa, ka pā kino ki te kukū o te moata me te mahi hanga. Ka teitei ake te matotoru, ka kitea te pānga matotoru ki te moata, engari kāore i te tino ōrite. Ko ētahi matotoru reo me te iti, engari he pai ake te mahi a te cellulose ether kua whakarerekētia ki te whakapai ake i te kaha hanganga o te moata mākū. Mā te pikinga o te matotoru, ka pai ake te pupuri wai o te cellulose ether.
Wā tuku: 28 Paenga-whāwhā 2024