Dispersants zviwedzere zvepasi zvinoshandiswa kudzikamisa zvimedu zvakasimba mumidhiya senge zvinonamira, pendi, mapurasitiki nemapurasitiki akasanganiswa.

Kare, mabhachi haadi zvekuparadzira. Masisitimu akadai sealkyd uye nitro pendi aisada ma dispersants. Dispersants haina kuonekwa kusvikira acrylic resin pendi uye polyester resin pendi. Izvi zvakabatanawo zvakanyanya nekugadzirwa kwemavara, nokuti kushandiswa kwemavara epamusoro hakugoni kuparadzaniswa kubva kune rubatsiro rwevanoparadzira.
Dispersants zviwedzere zvepasi zvinoshandiswa kudzikamisa zvimedu zvakasimba mumidhiya senge zvinonamira, pendi, mapurasitiki nemapurasitiki akasanganiswa. Imwe magumo ayo iketani yekugadziriswa inogona kunyungudutswa mumhando dzakasiyana dzekuparadzira, uye imwe magumo iboka repigment anchoring iro rinogona kushambadzirwa pamusoro pemavara akasiyana siyana uye rinoshandiswa kushandura kuita yakasimba / mvura yekubatanidza (pigment / resin mhinduro).

Iyo resin mhinduro inofanirwa kupinda munzvimbo dziri pakati pe pigment agglomerates. Ese ma pigment aripo se pigment agglomerates, ari "miunganidzwa" ye pigment particles, ine mweya uye mwando uri munzvimbo dzemukati pakati peimwe pigment particles. Izvo zvimedu zvinosangana kune imwe neimwe kumacheto uye makona, uye kudyidzana pakati pezvimedu kudiki, saka masimba aya anogona kukundwa nemichina yakajairwa yekuparadzira. Nekune rimwe divi, iwo akaunganidzwa akawedzera compact, uye pane kutarisana kutarisana pakati pepigment particles, saka zvakanyanya kuoma kuaparadzira muzvikamu zvekutanga. Munguva yekukuya kwe pigment, iyo pigment agglomerates zvishoma nezvishoma inova diki; iyo yakanaka mamiriro ndeyekuwana yekutanga particles.

Iyo pigment yekukuya inogona kukamurwa kuita matanho matatu anotevera: nhanho yekutanga kunyorova. Pasi pekusimudzira, mhepo yose uye unyoro pamusoro pepigment inodzingwa uye inotsiviwa nemhinduro ye resin. Iyo inoparadzira inonatsiridza kunyorova kwepigment, kushandura iyo yakasimba / gasi interface kuita yakasimba / yemvura interface uye nekuvandudza kugona kwekukuya; danho rechipiri ndiyo chaiyo pigment dispersion kukuya muitiro. Kuburikidza nemakanika simba simba uye shear simba, iyo pigment agglomerates inotyoka uye saizi yechikamu inoderedzwa kusvika kuzvikamu zvekutanga. Kana iyo pigment yakavhurwa ne mechanical simba, dispersant inokurumidza adsorb uye kuputira diki particle size particles; munhanho yekupedzisira yechitatu, kupararira kwe pigment kunofanirwa kugadzikana zvakakwana kudzivirira kuumbwa kwekusadzora kuyerera.

Iko kushandiswa kweakakodzera disperant kunogona kuchengetedza pigment zvimedu padanho rakakodzera kubva kune mumwe nemumwe pasina kudzoreredza kuonana. Mune akawanda maapplication, yakagadzikana deflocculated nyika inodiwa. Mune mamwe maapplication, iyo pigment dispersion inogona kuramba yakagadzikana pasi peinodzorwa coflocculation mamiriro. Zviyamuro zvekunyorovesa zvinogona kuderedza mutsauko wekusagadzikana pakati pe pigment uye resin mhinduro, ichimhanyisa kunyorova kwe pigment agglomerates ne resin; kuparadzira zvinobatsira zvinowedzera kugadzikana kwekupararira kwepigment. Nokudaro, chigadzirwa chimwe chete chinowanzova nemabasa ezviyamuro zvekunyorova nekuparadzira.

Pigment dispersion inzira kubva paaggregate kuenda kune yakapararira nyika. Sezvo saizi yechikamu ichiderera uye nzvimbo yepamusoro inowedzera, simba repamusoro rehurongwa rinowedzerawo.
Sezvo simba repamusoro regadziriro iri kuderera kwemaitiro ega ega, kuwedzera kuri pachena kuwedzera kwepamusoro penzvimbo, simba rakawanda rinodiwa kuti rishandiswe kubva kunze panguva yekukuya, uye kusimba kwekugadzirisa kwekupararira kunodiwa kuchengetedza kupararira kugadzikana kwegadziriro. Kazhinji, inorganic pigments ine hombe particle size, yakaderera chaiyo nzvimbo, uye yakakwirira pamusoro polarity, saka zviri nyore kuparadzira nekudzikamisa; nepo akasiyana organic pigment uye kabhoni dema aine madiki madiki saizi, akakura chaiwo nzvimbo dzepamusoro, uye yakaderera pamusoro polarity, saka zvinonyanya kuoma kuparadzira nekudzikamisa.

Nokudaro, vanoparadzira vanonyanya kupa zvinhu zvitatu zvekushanda: (1) kuvandudza pigment wetting uye kuvandudza kubudirira kwekukuya; (2) kuderedza viscosity nekuvandudza kuenderana neyakagadzika zvinhu, kuvandudza kupenya, kuzara uye kusiyanisa kwemufananidzo, nekuvandudza kuchengetedza kugadzikana; (3) kuwedzera pigment tinting simba uye pigment concentration uye kunatsiridza tinting kugadzikana kwemavara.

Nanjing Reborn New Materials inopawetting dispersant agent yependi uye coatings, kusanganisira zvimwe zvinoenderana neDisperbyk.

In nyaya inotevera, isu tichaongorora mhando dzevanoparadzira munguva dzakasiyana nenhoroondo yebudiriro yevanoparadzira.