He polysaccharide te cellulose e hanga ana i ngā momo ether wairewa-wai. Ko ngā whakamaroke cellulose he polymer wairewa-wai kore-ionic. He roa rawa te hītori o tōna whakamahinga, neke atu i te 30 tau, ā, he maha ngā momo. Kei te whakamahia tonutia ēnei i roto i te nuinga o ngā peita rapa, ā, koinei te nuinga o ngā whakamaroke. He tino whai hua ngā whakamaroke cellulose i roto i ngā pūnaha wai nā te mea ka whakamarokehia e rātou te wai. I roto i te umanga peita, ko ngā whakamaroke cellulose e whakamahia whānuitia ana ko:te metiloselulosa (MC), te hauwaitoiretira o te pūtau (HEC), te etil haikoitirīti heruro (EHEC), te haikoipirōporo heruro (HPC),te hydroxypropyl methyl cellulose (HPMC)me te hydroxyethyl cellulose whakarerekētia ā-wai (HMHEC). He polysaccharide wairewa-wai te HEC e whakamahia whānuitia ana i roto i te whakamātotoru o ngā peita latex hoahoanga matt me te semi-gloss. Kei te wātea ngā whakamātotoru i roto i ngā taumata matotoru rerekē, ā, he tino pai te hototahitanga tae me te pumau rokiroki o ngā whakamātotoru me tēnei cellulose.
Ko ngā āhuatanga whakataurite, ārai-piripiri, hanga-kiriata me te ārai-totoka o te kiriata paninga e whakawhirinaki ana ki te taumaha ngota whanaunga oHEC. Ka whakamātotoru te HEC me ētahi atu pūmua wairewa-wai kore-honohono i te wāhanga wai o te paninga. Ka taea te whakamahi takitahi i ngā whakamātotoru cellulose, te whakamahi tahi rānei me ētahi atu whakamātotoru hei whiwhi i te rheology motuhake. Ka taea e ngā ether cellulose te whai i ngā taumaha ngota whanaunga rerekē me ngā taumata matotoru rerekē, mai i te wairewa wai taumaha ngota iti 2% me te matotoru o te 10 mP s ki te matotoru taumaha ngota whanaunga teitei o te 100 000 mP s. Ko ngā taumata taumaha ngota iti te nuinga o te wā e whakamahia ana hei colloid tiaki i roto i te polymerization emulsion peita latex, ā, ko ngā taumata e whakamahia whānuitia ana (matotoru 4 800–50 000 mP·s) ka whakamahia hei whakamātotoru. Ko te tikanga o tēnei momo whakamātotoru nā te nui o te waikura o ngā here hauwai me te hononga i waenga i ngā mekameka ngota.
He pūmua taumaha-ngota teitei te cellulose tuku iho e whakamātotoru ana i te nuinga o te wā mā te hononga i waenga i ngā mekameka ngota. Nā te matotoru nui i te tere kutikuti iti, he ngoikore te āhuatanga whakataurite, ā, ka pā ki te kanapa o te kiriata paninga. I te tere kutikuti teitei, he iti te matotoru, he ngoikore te ātete ki te tauhiuhi o te kiriata paninga, ā, kāore i te pai te kī o te kiriata paninga. Ko ngā āhuatanga tono o te HEC, pērā i te ātete ki te paraihe, te kiriata me te tauhiuhi roera, e pā tika ana ki te whiriwhiri i te whakamātotoru. Waihoki, ko ōna āhuatanga rere pērā i te ātete ki te whakataurite me te tauhiuhi ka pāngia nuitia e ngā whakamātotoru.
Ko te cellulose whakarerekētia ā-wai (HMHEC) he whakamātotoru cellulose e whakarerekētia ana ā-wai ki ētahi mekameka peka (he maha ngā rōpū alkyl mekameka roa e whakaurua ana i te mekameka matua o te hanganga). He nui ake te matotoru o tēnei paninga i ngā tere kutikuti teitei, nō reira he pai ake te hanganga kiriata. Pērā i te Natrosol Plus Grade 330, 331, Cellosize SG-100, Bermocoll EHM-100. He rite tonu tōna pānga whakamātotoru ki te whakamātotoru cellulose ether me te papatipu ngota nui ake. Ka whakapai ake i te matotoru me te whakataurite o te ICI, ā, ka whakaiti i te taumahatanga o te mata. Hei tauira, ko te taumahatanga o te mata o HEC he 67 mN/m, ā, ko te taumahatanga o te mata o HMHEC he 55~65 mN/m.
He tino pai te rehu o te HMHEC, te ārai i te totohu, ngā āhuatanga taurite, te kanapa pai me te ārai i te whakapiripiri o te tae. He whānuitia te whakamahinga, ā, kāore he pānga kino ki te hanganga kiriata o ngā peita rapa iti. He pai te mahi hanga kiriata me te mahi ārai-waikura. He pai ake te mahi a tēnei whakamātotoru hononga motuhake me ngā pūnaha copolymer vinyl acetate, ā, he rite ngā āhuatanga ki ētahi atu whakamātotoru hononga, engari he māmā ake ngā whakatakotoranga.
Wā tuku: Paenga-whāwhā-25-2024