Organic pigments yog ib chav kawm tseem ceeb ntawm cov khoom siv tshuaj lom neeg zoo, plastics, inks, textile luam ntawv, thiab lwm daim teb. Piv rau inorganic pigments, organic pigments muaj cov xim muaj kuab heev, muaj zog zas xim, thiab muaj zog. Txawm li cas los xij, lawv cov khoom, xws li xob laim thiab kub tsis kam, feem ntau yuav tsum muaj cov synthesis thiab kev hloov kho kom zoo. Kab lus no yuav muab cov lus qhia ntxaws ntxaws rau cov qauv tseem ceeb thiab cov ntsiab lus tseem ceeb ntawm cov organic pigments.
1. Cov hau kev ntawm cov organic pigments
* AZotization cov tshuaj tiv thaiv (AZO Pigments)
Azo pigments yog cov organic xim ntau tshaj plaws, cov account rau ntau dua 60% ntawm kev lag luam sib koom. Lawv cov synthesis feem ntau ua tiav nyob rau hauv ob kauj ruam: diazotization thiab coupling kev tawm tsam:
Diazotization: Cov neeg muaj ntxhiab tsw qab zib hnov nrog sodium nitrite ntawm tsawg kub (0-5℃(xws li hydrochloric acid los yog sulfuric acid) los tsim cov ntsev diazonium.
Coupling: Salts cov ntsev ua tau zoo li cas nrog phenolic thiab cov duab sib xyaw ua ke (cov khoom sib txuas ua ke) raws li qhov tsis muaj zog alkally lossis nruab nrab ntawm cov qauv.
Piv txwv li, tus xim liab xim qub pr 57: 1 (Lithhol Liab) yog tsim los ntawm Coupling 2-naphthol nrog cov ntsev diazonium.
* Tsis - AZO xim synthesis
Tsis - Azo Pigments Xws li, Quinacridones, thiab dioxazines, thiab lawv cov tswv yim synthesis yog cov ntau dua:
Phatalocyanine Cov Pigments: Cov no yog tsim los ntawm condensing phthalonitrile nrog cov tooj liab lossis kev kho siab (200-300 degree), xws li kev sib tsoo thiab cov tshuaj sib tsoo) txhawm rau txhim kho lawv cov kev ua tau zoo.
Quinacridines: Cov no yog tsim los ntawm condensing succinic anhydride nrog lub amine compound, ua raws li Cycloization thiab oxidation. Lawv feem ntau siv nyob rau hauv high - kev ua tau zoo inks thiab tsheb txheej txheem.
2. Pigmentation Kho Tshuab
Cov kab mob crude tau txais los ntawm scthesis feem ntau xav tau kev kho mob pigmentation kom txhim kho lawv cov dispersibility, tinting lub zog, thiab huab cua tsis kam. Cov kev sib xws suav nrog:
Kev kho mob hnyav: sib tsoo cov xim siv roj polar (xws li pyridine (xws li pyridine thiab tsis} polar solvents (xws li Toluene) los kho cov crystal morphology.
Acid / Alkaline Kev Kho Mob: qee ntu yaj cov xim thiab recrystallizing nws los ntawm kev tswj hwm tus nqi ntawm particle loj.
Cov tshuaj tiv thaiv saum npoo: txheej nrog coupling cov neeg sawv cev xws li cov kab ntxaij thiab cov titanates, lossis ntxiv aluminium / calcium / calcium / calcium ua kom txhim kho.
3. Daim ntawv thov thiab xaiv cov organic pigments
Cov chaw thov sib txawv muaj cov sib txawv rau cov organic pigments:
Ink Kev Lag Luam: Siab pob tshab thiab kev ua kom zoo rheological yog tseev kom muaj, thiab azo pas dej pigments (xws li PR 48: 2) feem ntau siv.
Plastic coloring: High temperature resistance (>200 degree) yuav tsum tau, thiab phthalocyanine xiav (PB 15: 3) lossis siab {{}}} performance mession quinacridone yog feem ntau siv.
TEXTILE PRINTING: Lub tshuab ntxhua khaub ncaws thiab kev ceev yog qhov tseem ceeb, thiab azo lossis azo lossis condensed azo pigments feem ntau xaiv.
4. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
Cov khoom lag luam organic niaj hnub xim tau ua rau tsom mus rau ntawm cov tshuaj ntsuab ntsuab. Piv txwv li:
Hloov pauv cov kuab tshuaj organic nrog aqueous media kom txo qis voc emissions.
Kev tsim kho qis - kev sib tw muaj txiaj ntsig (piv txwv li, hloov cyanide nrog urea).
Txo txoj kev pheej hmoo ntawm cov hlau tsiv tsiv los ntawm kev siv tshuab microencapsulation.
Tag
Kev tsim cov organic pigments cuam tshuam nrog cov tshuaj lom neeg uas nyuaj heev, xav tau kev tswj cov kab hlau los ntawm cov kab hlau molecular los ntawm post - kev. Nrog nce kev tswj hwm ib puag ncig thiab kev cog qoob loo siab, txoj kev txhim kho yav tom ntej ntawm cov articic pigments yuav tso ntau dua kev ruaj khov thiab ua kom muaj kev txhawb zog tshiab.
