I-Ultrafine pigment powder ihlukaniswe ikakhulukazi ibe yi-organic pigments kanye ne-inorganic pigments, i-organic pigments ihlukaniswe ikakhulukazi ibe yi-azo pigments, i-lake pigments, i-heterocyclic pigments, i-ketone pigments eyindandatho ewugqinsi, i-phthalocyanine pigments nezinye izingulube. Izingulube ze-Inorganic zihlukaniswa kakhulu zibe i-titanium dioxide, i-carbon black, i-iron oxide ebomvu, njll. Imibala ye-organic noma ye-inorganic inemibala egqamile, amandla ombala aphezulu, amandla ombala aphezulu nokucaca okuphezulu, okuhlangabezana nezidingo ze-coatings noyinki wokunyathelisa.
Kodwa-ke, ekulungiseni i-pigment powder, ubukhulu bezinhlayiyana bucolile, ubuso be-pigment powder buzokhula, okungaholela kalula ku-agglomeration, okwenza izinhlayiya ezinkulu, upende kanye nokungaqini kwesistimu ye-inki, okuthinta kakhulu izinga lomkhiqizo.
Ngalesi sikhathi, i-organic ammonium salt dispersant iyadingeka ukwengeza kunqubo yokuchotshozwa kwe-pigment, i-pigment dispersant ohlelweni lokunamathisela i-pigment, ikakhulukazi i-adsorb ebusweni bempushana, inciphisa amandla angaphezulu ezinhlayiya ze-pigment ze-ultrafine, ukuze kuzuzwe umphumela wokuhlakazeka okufanayo, kanye ne-organic ammonium dispersant kasawoti ingavimbela ngempumelelo ukugeleza emuva kwezinwele zombala ezintantayo zokuhlala. Ukuhambisana kahle nopende noyinki wokuphrinta ukuthuthukisa ukusebenza kokunikeza umbala.
KunganiI-ejenti ehlakazayo i-NNOumsebenzi?
II-ejenti ehlakazayo i-NNOI-molecule iqukethe iqembu le-anchor kanye nengxenye yokuzinza. Iqhaza leqembu le-anchoring ukuhlinzeka ngamandla anele aqinile okubopha ezinhlayiyeni zokugcwalisa i-pigment. Ama-molecule ahlakazekayo awawi ebusweni bezinhlayiya, okuyimfuneko ukuze i-dispersant isebenze. Umsebenzi wengxenye yokusimamisa uwukuzinzisa izinhlayiya ze-pigment aggregate ezihlakazwa ngamandla omshini ngokusebenzisa i-electrostatic repulsion kanye nokumelana nendawo esigabeni soketshezi ukuvimbela izinhlayiya ukuthi zingahlangani.
Kuma-organic solvents, lapho ingxenye ezinzile ye-disperant izinza izinhlayiya ze-pigment ezihlakazekile ngokumelana nendawo, lapho ukuhlukanaI-ejenti ehlakazayo i-NNOizinhlayiya zincane kunobukhulu be-solvent chain, i-solvent chain icindezelana futhi i-entropy iyancipha. Emanzini, i-ionization yenzeka eduze kwamaqembu e-ionic ukuze akhe ungqimba oluphindwe kabili, futhi ukuxoshwa kwe-electrostatic kuvimbela ukuhlangana kwezinhlayiyana. Uma i-polyether engeyona i-ionized izinzile, i-polyether igxilisa izinhlayiya ze-pigment ezihlakazekile ngokuphikiswa kwendawo.
Isikhathi sokuthumela: May-19-2022