Dab tsi yog cov haujlwm ntawm sodium sulfide hauv cov txheej txheem dyeing nrog sulfur dyes?

Introduction

Kev lag luam textile vam ntau heev Cov txheej txheem dyeing ntxiv xim thiab zoo nkauj txaus siab rau fabrics. Ntawm ntau yam tshuaj siv, Sodium sulfide plays lub luag haujlwm tseem ceeb, tshwj xeeb tshaj yog nyob rau hauv qee hom kev dyeing. Kab lus no delves rau hauv cov haujlwm tshwj xeeb thiab qhov tseem ceeb ntawm sodium sulfide hauv cov ntsiab lus ntawm dyeing.

Cov Khoom Siv Tshuaj Sodium Sulfide

Sodium sulfide, nrog rau cov tshuaj formula Na₂S (feem ntau ntsib raws li nws cov hydrate Na₂S·9H₂O), yog xim tsis muaj xim, dej soluble ntsev. Thaum yaj hauv dej, nws tsim muaj zog alkaline daws. Qhov alkalinity no yog cov cuab yeej tseem ceeb uas pab txhawb rau nws txoj haujlwm hauv cov txheej txheem dyeing. Tsis tas li ntawd, sodium sulfide muaj qhov txo qis, uas tso cai rau nws koom nrog cov tshuaj tiv thaiv redox uas yog qhov tseem ceeb rau ntau lub tshuab dyeing.

Sodium Sulfide hauv Sulfur Dye Synthesis

Txhawb nqa Dye Intermediate hloov dua siab tshiab

Sulfur dyes yog qhov tseem ceeb hauv kev lag luam textile, tshwj xeeb tshaj yog tsim cov xim tsaus xws li dub thiab navy. Sodium sulfide yog ib qho tseem ceeb hauv kev sib xyaw ntawm cov dyes. Nws txhawb kev hloov dua siab tshiab ntawm dye intermediates. Piv txwv li, nyob rau hauv cov tshuaj tiv thaiv ntawm aromatic amines los yog phenols nrog sulfur los yog polysulfides rau daim ntawv. Sulfur dyes, sodium sulfide ua raws li reactant uas pab tsav cov tshuaj tiv thaiv rau pem hauv ntej. Nws tuaj yeem koom nrog cov tshuaj tiv thaiv uas qhia cov sulfur - muaj cov pab pawg hauv cov qauv dye, uas yog qhov tseem ceeb rau cov xim - tsim cov khoom ntawm cov khoom siv zas zaum kawg.

Kev cuam tshuam rau qhov kawg Dye Product Performance

Lub xub ntiag ntawm sodium sulfide thaum lub sij hawm sulfur dye synthesis kuj cuam tshuam qhov kev ua tau zoo ntawm qhov kawg dye. Nws tuaj yeem cuam tshuam cov khoom xws li xim ceev, lightfastness, thiab tag nrho cov xim siv ntawm cov dye. Los ntawm kev tswj cov tshuaj tiv thaiv nrog sodium sulfide, cov tuam ntxhab tuaj yeem txhim kho cov khoom no kom tau raws li qhov xav tau ntawm cov ntawv thov sib txawv. Piv txwv li, qhov zoo ntawm sodium sulfide tuaj yeem txhim kho lub lightfastness ntawm cov xim, kom ntseeg tau tias cov ntaub dyed khaws nws cov xim thaum raug tshav ntuj rau lub sijhawm ntev.

Sodium sulfide nyob rau hauv dyeing txheej txheem

Raws li Tus Neeg Saib Xyuas Kev Txom Nyem

1.Txo Sulfur Dyes rau Uptake

Sulfur dyes, nyob rau hauv lawv lub xeev, yog insoluble nyob rau hauv dej thiab tsis tuaj yeem ncaj qha mus rau cov ntaub. Sodium sulfide ua hauj lwm raws li ib tug haib txo tus neeg sawv cev. Nws txo cov sulfur dyes, rhuav cov sulfur - sulfur bonds nyob rau hauv cov xim molecules. Cov txheej txheem kev txo qis no hloov cov xim tsis muaj leej faj dyes rau hauv cov ntaub ntawv tsis muaj xim, hu ua leuco - compounds lossis sodium ntsev ntawm leuco - daim ntawv (hauv nruab nrab alkaline). Piv txwv li, nyob rau hauv cov ntaub ntawv ntawm ib tug raug sulfur dub dye, sodium sulfide reacts nrog cov dye molecule, muab electrons mus ua txhaum cov sulfur - leej faj linkages thiab tsim ib hom soluble uas yuav absorbed los ntawm cov ntaub.

2.Txhim kho qhov txo qis ib puag ncig

Thaum lub sij hawm dyeing txheej txheem, nws yog ib qho tseem ceeb kom muaj ib tug txo ib puag ncig los tiv thaiv lub ntxov ntxov oxidation ntawm cov xim dye. Sodium sulfide tseem ua raws li kev txo tus neeg sawv cev thoob plaws hauv cov txheej txheem, kom ntseeg tau tias leuco - daim ntawv ntawm cov dye tseem nyob ruaj khov. Qhov no yog qhov tseem ceeb vim hais tias yog cov leuco - daim ntawv yog oxidized sai heev, nws yuav rov qab mus rau nws lub xeev insoluble thiab yuav tsis muaj peev xwm nkag mus rau hauv ntaub zoo. Qhov txo qis zog ntawm sodium sulfide yog xws li tias nws tuaj yeem tiv thaiv cov kab mob oxidizing uas yuav muaj nyob rau hauv cov xim da dej, xws li yaj oxygen los ntawm huab cua.

Raws li Alkalinity Provider

1.Dye Solubilization

Ntxiv nrog rau nws txoj kev txo qis, sodium sulfide pab txhawb rau alkalinity ntawm cov dye da dej. Lub alkaline xwm ntawm cov tshuaj pab nyob rau hauv solubilizing lub txo sulfur dyes. Thaum sulfur dyes raug txo los ntawm sodium sulfide, lawv tsim leuco - acids. Lub alkaline ib puag ncig muab los ntawm sodium sulfide ces neutralizes cov leuco - acids, hloov mus rau hauv lawv cov sodium ntsev cov ntaub ntawv, uas yog heev soluble nyob rau hauv dej. Qhov kev solubilization no yog qhov tseem ceeb rau kev faib khoom ntawm cov xim hauv cov dye da dej thiab nws cov khoom siv tom ntej los ntawm cov ntaub.

2.Fiber Swelling thiab Dye Penetration

Cov alkalinity los ntawm sodium sulfide kuj ua rau cov fibers hauv cov ntaub o me ntsis. Rau cov fibers ntuj xws li paj rwb, cov tshuaj alkaline cuam tshuam cov hydrogen bonding nyob rau hauv cov qauv fiber ntau, ua rau nws los ua ntxeem tau. Qhov o no tso cai rau txo cov xim molecules kom nkag tau yooj yim dua rau hauv cov fiber ntau sab hauv. Yog li ntawd, cov txheej txheem dyeing yuav ua tau zoo dua, thiab cov xim nkag tau zoo dua thiab nrawm dua.

Raws li Dyeing Aid rau Kev Txhim Kho Zoo

1. Txhim kho Dye Uptake thiab Levelness

Sodium sulfide tuaj yeem txhim kho qhov nqus ntawm cov dyes rau ntawm daim ntaub. Cov sodium ions tso tawm los ntawm sodium sulfide hauv da dej zas xim tuaj yeem cuam tshuam nrog qhov chaw tsis zoo ntawm qhov chaw fiber ntau (nyob rau hauv rooj plaub ntawm cellulosic fibers zoo li paj rwb, uas muaj qhov tsis zoo me ntsis vim muaj cov pab pawg hydroxyl). Qhov kev sib cuam tshuam no yuav pab txhawb qhov kev nyiam ntawm cov xim molecules thiab fiber ntau, txhawb nqa cov xim zoo dua. Tsis tas li ntawd, nws tuaj yeem ua rau muaj ntau yam xim tis (levelness) ntawm cov ntaub. Los ntawm kev ua kom yooj yim rau kev txav ntawm cov dye molecules ntawm fiber ntau thiab mus rau hauv cov fiber ntau, sodium sulfide pab tiv thaiv kev tsim cov dye concentration gradients, uas tuaj yeem ua rau cov xim tsis sib xws.

2. Txhim kho xim ceev

Kev siv sodium sulfide hauv cov txheej txheem dyeing tuaj yeem txhim kho cov xim ceev ntawm cov ntaub dyed. Qhov txo cov sulfur dyes, tom qab absorbed los ntawm cov ntaub, ces oxidized los hloov cov insoluble sulfur dye nyob rau hauv lub fiber qauv. Lub xub ntiag ntawm sodium sulfide thaum lub sij hawm pib txo cov kauj ruam kom paub meej tias cov xim yog sib npaug ntawm cov fiber. Thaum cov xim yog oxidized thiab tsau rau hauv qhov chaw, qhov no txawm faib ua rau cov xim zoo dua rau kev ntxuav, txhuam, thiab teeb pom kev zoo. Piv txwv li, fabrics dyed nrog sulfur dyes siv sodium sulfide raws li ib tug txo tus neeg saib xyuas yuav khaws lawv cov xim zoo dua tom qab ntau lub sij hawm ntxuav piv rau cov dyed nrog rau lwm cov tshuaj txo los yog nyob rau hauv tsis zoo tej yam kev mob.

Tshem tawm Fiber Impurities hauv Kev Kho Mob Ua Ntej

1.Desizing thiab Degumming

Hauv kev kho cov fibers ua ntej dyeing, sodium sulfide tuaj yeem siv los pab tshem tawm cov impurities. Rau cov fibers ntuj xws li txhob lo lo ntxhuav, uas muaj sericin (cov pos hniav - zoo li cov khoom), thiab paj rwb, uas tej zaum yuav muaj sizing agents ntxiv thaum lub sij hawm tsim textile, sodium sulfide yuav pab tau nyob rau hauv lub desizing thiab degumming txheej txheem. Cov xwm txheej alkaline ntawm sodium sulfide tuaj yeem rhuav tshem cov sericin hauv cov lo lo ntxhuav thiab cov neeg ua haujlwm loj hauv paj rwb. Qhov no tsis tsuas yog npaj cov fiber ntau rau qhov zoo dua dye uptake tab sis kuj txhim kho tag nrho cov ntaub ntawv zoo.

2.Kev ntxuav thiab ntxuav

Sodium sulfide kuj tseem siv tau rau hauv cov txheej txheem scouring kom tshem tawm cov roj, rog, thiab lwm yam kab mob los ntawm fiber ntau. Nyob rau hauv ib tug scouring da dej uas muaj sodium sulfide, alkaline ib puag ncig pab emulsify thiab saponify cov fatty tshuaj muaj nyob rau ntawm fiber. Qhov no ua rau muaj qhov huv si fiber ntau, uas yog qhov tseem ceeb rau kev ua tiav cov dyeing zoo ib yam. Los ntawm kev tshem tawm cov impurities no, sodium sulfide xyuas kom meej tias cov dye molecules tuaj yeem cuam tshuam ncaj qha nrog cov fiber ntau yam tsis muaj kev cuam tshuam los ntawm cov kab mob saum npoo av.

Qhov zoo tshaj plaws kev siv thiab kev txiav txim siab

Yuav tsum tau noj tshuaj

Tus nqi ntawm sodium sulfide siv nyob rau hauv cov txheej txheem dyeing nws txawv nyob ntawm ntau yam, nrog rau hom dye, cov ntaub yog dyed, thiab qhov xav tau xim qhov tob. Feem ntau, rau sulfur dyeing, qhov ntau npaum ntawm sodium sulfide yog feem ntau nyob rau hauv thaj tsam ntawm 20% - 100% ntawm qhov hnyav ntawm cov xim. Txawm li cas los xij, yuav tsum tau ua tib zoo optimization. Kev siv cov sodium sulfide tsawg dhau yuav ua rau txo qis ntawm cov xim tsis tiav, ua rau cov xim tsis zoo thiab tsis muaj cov xim tsis zoo. Ntawm qhov tod tes, kev siv ntau dhau tuaj yeem ua rau muaj teeb meem xws li dhau - txo qis, uas tuaj yeem cuam tshuam rau cov xim zoo thiab tseem ua rau muaj kuab paug ib puag ncig vim yog cov sulfide ntau dhau hauv cov dej ntws tawm.

Ib puag ncig cuam tshuam

Kev siv sodium sulfide hauv kev lag luam dyeing muaj kev cuam tshuam ib puag ncig. Thaum tso tawm rau hauv cov dej hauv lub cev, sulfide ions tuaj yeem ua rau cov dej thiab cov pa oxygen los tsim cov roj hydrogen sulfide, uas muaj cov ntxhiab tsw tsw qab thiab muaj kuab lom rau cov dej hauv dej. Yuav kom txo tau qhov no, txoj kev kho dej khib nyiab yog tsim nyog. Cov no yuav muaj xws li aeration rau oxidize sulfide ions kom tsis tshua muaj teeb meem sulfate ions, los yog siv cov tshuaj los nag txoj kev tshem sulfide li hlau sulfide precipitates. Tsis tas li ntawd, kev siv zog tau tsim los tsim cov txheej txheem dyeing kom ruaj khov uas txo qis kev siv sodium sulfide lossis nrhiav lwm txoj hauv kev, ntau tus phooj ywg ib puag ncig txo cov neeg ua haujlwm.

xaus

Sodium sulfide yog ib qho tshuaj tsis tseem ceeb hauv cov txheej txheem dyeing ntawm kev lag luam textile. Nws cov khoom siv tshuaj lom neeg tshwj xeeb, ua tus neeg saib xyuas kev txo qis, alkalinity tus muab kev pabcuam, thiab kev pabcuam dyeing, ua rau nws tseem ceeb rau kev sib txuas thiab siv cov sulfur dyes. Nws ua lub luag haujlwm tseem ceeb hauv kev ua kom zoo ntawm cov ntaub dyed, los ntawm kev txhawb nqa cov dye uptake thiab levelness mus rau kev txhim kho xim ceev. Txawm li cas los xij, nws txoj kev siv kuj yuav tsum tau ua tib zoo xav kom sib npaug nws cov txiaj ntsig nrog kev txhawj xeeb ib puag ncig. Raws li kev lag luam textile txuas ntxiv hloov mus rau kev coj ua kom ruaj khov, lub luag haujlwm ntawm sodium sulfide yuav tsum tau rov ntsuas dua, thiab kev siv zog los tsim lwm cov thev naus laus zis uas tuaj yeem ua tiav cov txiaj ntsig zoo sib xws nrog kev cuam tshuam ib puag ncig yuav yog qhov tseem ceeb.