Reactive Dyeing muaj ib qho zoo heev dissolution xeev nyob rau hauv dej.Reactive dyes feem ntau vam khom rau sulfonic acid pawg ntawm cov xim molecule kom yaj hauv dej.Rau meso-kub reactive dyes uas muaj vinylsulfone pawg, tshwj tsis yog rau sulfonic acid pawg Tsis tas li ntawd, nws cov β-ethylsulfone sulfate kuj yog ib pab pawg dissolving zoo heev.Hauv cov tshuaj aqueous, cov sodium ions ntawm sulfonic acid pawg thiab -ethylsulfone sulfate pawg tau txais cov tshuaj tiv thaiv dej kom ua rau cov xim pleev xim rau cov anion thiab yaj hauv dej.Kev dyeing ntawm reactive dyes cia siab rau qhov tsis zoo ions ntawm cov dyes kom dyed rau fiber.Solubility ntawm reactive dyes tshaj 100 g / L.
Solubility ntawm cov dyes feem ntau yog 200-400 g / l, thiab qee cov dyes tuaj yeem ncav cuag 450 g / l.
Tab sis nyob rau hauv cov txheej txheem dyeing, lub solubility ntawm cov dye yuav txo vim ntau yam yog vim li cas (los yog txawm insoluble kiag li).
Thaum lub solubility ntawm cov dye txo qis, ib feem ntawm cov dye yuav hloov los ntawm ib tug dawb tsis zoo ion rau hais, thiab tus nqi repulsion ntawm hais yog heev txo.
Particles thiab particles yuav nyiam ib leeg los tsim agglomeration
Hauv kev sib sau ua ke no, cov xim zas xim sib sau ua ke rau hauv aggregates, tom qab ntawd rau hauv aggregates, thiab thaum kawg mus rau hauv flocs.Txawm hais tias floc yog ib qho xoob xoob, vim yog hluav taws xob ob txheej tsim los ntawm cov nqi zoo thiab tsis zoo nyob ib puag ncig nws, nws nyuaj rau lub zog shear ntawm cov dej cawv dav dav kom decompose nws, thiab floc yog yooj yim ntawm cov ntaub.Los nag rau ntawm qhov chaw, ua rau nto staining lossis staining.
Thaum cov dyeing muaj xws li agglomeration, xim ceev yuav pom tseeb txo qis, thiab nws yuav ua rau txawv qib ntawm stains, stains, thiab stains.Rau qee cov dyes, cov flocs yuav ua rau kom lub rooj sib txoos nyob rau hauv lub shear quab yuam ntawm dye cawv, ua rau lub cev qhuav dej thiab salting tawm.Thaum salting tshwm sim, cov xim dyed yuav dhau los ua lub teeb heev, lossis txawm tias tsis dyed, txawm tias nws yog dyed, nws yuav ua rau cov xim loj thiab stains.
Reactive Dyeing
Ua rau dye aggregation
Qhov laj thawj tseem ceeb yog electrolyte.Hauv cov txheej txheem dyeing, lub ntsiab electrolyte yog dye accelerant (sodium sulphate hmoov thiab ntsev).Cov dye accelerant muaj sodium ions, thiab sodium ion sib npaug hauv cov dye molecule qis dua li ntawm cov dye accelerant.Qhov sib npaug ntawm cov sodium ions thiab qhov qub concentration ntawm lub accelerator thaum lub sij hawm dyeing txheej txheem yuav tsis muaj ntau yam cuam tshuam rau solubility ntawm cov xim nyob rau hauv lub dye da dej.
Txawm li cas los xij, thaum tus naj npawb ntawm cov dye-txhim kho tus neeg sawv cev nce, qhov concentration ntawm sodium ions hauv cov tshuaj kuj nce ntxiv.Sodium ions ntau dhau yuav cuam tshuam cov ionization ntawm sodium ions ntawm cov pawg yaj ntawm cov xim molecules, yog li txo cov solubility ntawm cov xim.
Thaum qhov concentration ntawm cov dye accelerator ntau tshaj 200 g / L, feem ntau cov dyes yuav dhau mus txawv degrees ntawm aggregation.
Thaum qhov concentration ntawm cov dye accelerator ntau tshaj 200 g / L, feem ntau cov dyes yuav dhau mus txawv degrees ntawm aggregation.
Thaum cov ntsiab lus ntawm cov dye-txhim kho tus neeg sawv cev ntau tshaj 250 g / L, cov degree ntawm agglomeration yuav intensified, thawj tsim agglomerates, thiab ces sai sai tsim agglomerates thiab floccules nyob rau hauv lub shear quab yuam ntawm cov tshuaj dye.Rau qee cov dyes nrog tsawg solubility, Ib feem ntawm nws salted tawm thiab txawm lub cev qhuav dej.
Dyes nrog cov qauv molecular sib txawv muaj qhov sib txawv los tiv thaiv kev sib sau thiab kev ua kom tsis muaj zog.Qhov qis dua qhov solubility, qhov phem dua qhov kev sib sau ua ke thiab salting tawm tsis kam.
Lub solubility ntawm cov dye yog tsuas yog txiav txim los ntawm tus naj npawb ntawm sulfonic acid pawg nyob rau hauv lub dye molecule thiab tus naj npawb ntawm β-ethylsulfone sulfates.
Nyob rau tib lub sijhawm, qhov ntau dua qhov hydrophilicity ntawm cov dye molecule, qhov solubility ntau dua, thiab qis dua hydrophilicity, qhov solubility qis dua.(Piv txwv li, dyes nrog cov qauv azo yog ntau hydrophilic dua dyes nrog cov qauv heterocyclic.) Tsis tas li ntawd, qhov loj dua cov qauv molecular ntawm cov xim, qhov solubility qis dua, thiab cov qauv molecular me dua, cov solubility ntau dua.
Peb yog Reactive Dyeing tsum.Yog tias koj muaj lus nug txog peb cov khoom, thov koj xav tiv tauj peb.
Post lub sij hawm: Aug-01-2020