Txheej txheem cej luam ntawm Jute Fiber thiab Fiber Extracted los ntawm Sulphuric Acid Txuj Ci
Raws li cov nroj tsuag ntuj muaj fiber ntau, Jute Fiber muaj ntau yam zoo xws li cov txiaj ntsig siab zoo, tus nqi qis, thiab cov kws kho kom zoo nkauj. Nws yog dav siv hauv kev kho kom zoo nkauj, ntim khoom, textile, kho mob thiab lwm daim teb. Txawm li cas los xij, ntxiv rau cellulose, jute fiber kuj muaj cov impurities xws li hemicellulose, teev, thiab pectin. Lub xub ntiag ntawm cov impurities txwv daim ntawv thov ntawm jute fiber ntau nyob rau hauv high-end teb. Yog li ntawd, zoo extraction ntawm Jute cellulose tau dhau los ua tus yuam sij kom nce ntxiv tus nqi ntawm jute fiber ntau. Nyob rau tam sim no, tshuaj lom neeg, txoj kev coj ntawm lub cev, thiab lawv txhua tus muaj cov txheej txheem npaj sijhawm ntev, tab sis lawv txhua cov kauj ruam kev npaj ua haujlwm ntev, thiab siv hluav taws xob ntau. Tsis tas li ntawd, ntau qhov kev txiav txim siab ntawm cov kua qaub thiab alkali muaj ib qho kev cuam tshuam zoo ntawm cov txheej txheem polymerization thiab cov qauv ntawm cov kev ua tau zoo, cuam tshuam rau daim ntawv thov kev ua tau zoo ntawm cellulose. Tawm tsam cov keeb kwm yav dhau los no, cov sulfuric acid tuaj rau hauv kev ua, coj cov kev sib tawg tshiab hauv kev rho tawm ntawm cov lus hais ntawm kev hais plaub.
Tus txheej txheem tseem ceeb ntawm cov sulfuric acid txuj ci rau rho cellulose yog rau cov cheeb tsam tsis yog-crystalline hauv cov qauv cellulose, yog li tau txais cellulose nrog siab crystallinity. Sulfuric acid hydrolysis tsis muaj teeb meem tsuas yog-crystalline cheeb tsam ntawm cellulose ib nrab-ester pawg ntawm cov dispersibility thiab muaj kev ruaj ntseg ntawm cellulose.
Tsoos Jute Medical Fellulose cov kev coj thiab cov kev txwv
(I) cov hau kev ib txwm muaj
Ntawm tam sim no, Jute fiber ntau siv nyob rau hauv ntau cov qauv ntawm cov qauv siv tshuaj, kev siv lub cev, lossis kev sib txuas ntawm ntau txoj kev. Piv txwv li, cov txheej txheem tsim lus Jute cellulose los ntawm cov tshuaj lom neeg lom neeg yog fiber ntau alkali Kev Kho Tshuaj - Sodium Tshuaj Chlorite - Kev Kho So Fiber - Dej Ntxuav - Dej ntxuav - kom qhuav - cellulose.
(II) cov kev txwv
Cov txheej txheem ib txwm muaj ntau yam tsis xws luag. Cov txheej txheem npaj tau npaj ntev thiab cuam tshuam nrog ntau cov kauj ruam, uas ua rau tag nrho cov txheej txheem extraction sijhawm siv; Muaj ntau cov kauj ruam qhuav, uas nce hluav taws xob noj; Lub zog noj muaj zog yog qhov siab, thiab siv cov kua qaub siab thiab cov qauv ntawm cellulose thiab tseem cuam tshuam rau daim ntawv thov kev ua tau zoo ntawm cellulose.
Cov txheej txheem sulfuric acid ntws thiab cov tsis tseem ceeb
(I) txheej txheem ntws
1. PretReatment:
• Tuav cov Jute fiber ntau rau qhov loj me me (xws li 0. 180mm sab cib) rau kev ua tiav. • Siv dej lossis lwm cov kuab tshuaj kom tshem tawm cov dej-soluble cov khoom hauv jute fiber ntau.
2. Cellulose rho tawm:
• Tso cov lus dag ntxias jute fiber ntau hmoov rau hauv cov tshuaj reactor thiab ntxiv cov sulfuric acid daws ({% sulfuric acid).
• Ua rau qhov kub thiab txias (xws li 40 degree) thiab sijhawm (xws li 1 teev), thiab xyuas kom meej tias cov tshuaj tiv thaiv tau tag los ntawm cov khoom tsim hws kom haum.
• Tom qab cov tshuaj tiv thaiv tau ua tiav, ntxuav cov seem uas muaj dej ntau ntau kom txog thaum nws nruab nrab.
3. Purification:
• Ntxuav cov khoom siv cov dej sib xyaw nrog cov dej ntau ntau kom txog thaum nws yog nruab nrab kom tshem tawm cov khoom seem thiab impurities.
• Tau txais cellule ntshiab los ntawm kev lim thiab kom qhuav (xws li kom qhuav ntawm 60 degree).
(Ii) cov tsis tseem ceeb
• Qhov kub thiab txias: cov thev naus laus zis kho kom sov yog tswj ntawm 50 degree -60 degree. Qhov kub muaj qhov tseem ceeb uas cuam tshuam rau cov tshuaj tiv thaiv tus nqi thiab kev tawm tsam kev tawm tsam. Kev kub dhau heev yuav ua rau muaj kev tsis txaus ntseeg, thaum tsis tshua muaj kub tsawg yuav qeeb qeeb.
• Sijhawm: Cov tshuaj txhuam kua rwb thaiv tsev yog 45min {1}} min. Yog hais tias lub sijhawm luv heev, cov impurities yuav tsis raug tshem tawm kom huv; Yog tias lub sijhawm ntev dhau, kev ua yeeb yam ntawm cellulose yuav cuam tshuam.
• Tus Da Dej Phom: Tus da dej piv yog feem ntau 1: 10-1: 20. Ib qho piv tau tus da dej haum muaj peev xwm tuaj yeem paub tseeb tias Jute Fiber ntau tau sib cuag nrog cov kev kho kua thiab txhim kho cov kev kho mob.
• Cov sulfuric acid dej: sulfuric acid tshuaj tau txiav txim siab raws li cov txheej txheem uas yuav tsum tau ua, feem ntau yog {1} g / l. Kev ua rau cov roj sulfuric ntau dhau yuav nce nqi thiab tuaj yeem ua rau cov khoom siv rau cov khoom siv; Tsawg dhau sulfuric acid yuav ua rau raug tshem tawm tsis zoo.
Qhov zoo ntawm cov sulfuric acid txheej txheem
(I) cov txheej txheem luv luv
Piv nrog cov txheej txheem ib txwm muaj yooj yim thiab txo cov kauj ruam tsis tseem ceeb, yog li ua kom lub sijhawm npaj thiab txhim kho ntau lawm.
(II) Kev Siv Hluav Taws Xob Tsawg
Cov txheej txheem muaj tsawg dua cov kauj ruam ziab, thiab txhua cov txheej txheem tau ua haujlwm nyob rau hauv ib txwm muaj siab, uas txo kev siv hluav taws xob. Nyob rau tib lub sijhawm, ib puag ncig cov phooj ywg ntxiv rau ib puag ncig yog siv, thiab cov nqi ntawm cov tshuaj sib ntxiv yog me me, uas ntxiv ntxiv txo cov nqi tsim khoom.
(Iii) qhov kev tshem tawm ntawm tus nqi tshem tawm
Tom qab tau kho los ntawm cov sulfuric tshem tawm cov nyhuv suldic ua rau hauv Jute fiber yog qhov zoo, tshwj xeeb tshaj yog kev tshem tawm cov nyhuv ntawm Lignin thiab Hicicellulose tseem ceeb. Piv txwv li, tom qab muaj roj ntsha ua ke kev kho mob, cov ntsiab lus zoo hauv Jute Fiber tau txo ntawm 10.21% rau 5.35%, ib qho tsawg ntawm 47.6%; Cov ntsiab lus ligin tau raug txo los ntawm 8.25% rau 7.43%, yog li nce ntawm 9. nce lub cellulose cov ntsiab lus hauv jute fiber los ntawm 8.39%.
(Iv) tsis muaj kev puas tsuaj rau cov qauv cellulose thiab kev ua tau zoo
Lub cellulose tsim los ntawm cov txheej txheem no muaj cov ntsiab lus siab ntawm -cellulose thiab tsis puas lub cellulose qauv thiab kev ua tau zoo, yog li ua kom muaj kev ua tau zoo thiab kev ua tiav ntawm cellulose.
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Cov txheej txheem sulfuric tau ua kom tawg tshiab hauv kev sib tw ntawm lub xov tooj ntawm lub ntsej muag, thiab tsis muaj kev puas tsuaj rau cov qauv cellulose thiab kev ua tau zoo. Piv nrog cov txheej txheem tsoos, cov txheej txheem no tuaj yeem tshem tawm cov nqi Jute ntau dua, txo cov khoom lag luam ntau lawm, thiab muaj cov khoom siv thov kom dav.
Nyob rau yav tom ntej, nrog kev txhim kho txuas ntxiv thiab tsim kho tshiab ntawm thev naus laus zis, cov sulfuric acid txheej txheem yuav tsum tau ua kom zoo dua thiab txhim kho. Piv txwv li, ntau cov qauv siv reactor thiab kev ua haujlwm tau tuaj yeem kawm kom txhim kho cov kev cuam tshuam thiab kev cuam tshuam txawv txav; Tshiab Biozyme npaj tuaj yeem tsim kho kom ntxiv cov nqi tsim khoom; Thiab khib kev kho thiab rov ua dua tshiab hauv cov txheej txheem tuaj yeem txhawb kom ua tiav cov khoom ntsuab ntxiv. Nws ntseeg tau tias nyob rau yav tom ntej, cov sulfuric acid kev lag luam muaj kev lag luam fiber ntau, txhawb kev lag luam fiber ntau thiab cov lus qhia ntsuab.