Kev Taw Qhia Txog Paj Rwb Thiab Cellulose
Paj rwb, ib hom fiber ntuj uas tau los ntawm cov nroj tsuag paj rwb, feem ntau yog ua los ntawm cellulose. Cellulose, ib hom complex carbohydrate, yog cov khoom tseem ceeb ntawm cov phab ntsa cell hauv cov nroj tsuag, muab kev txhawb nqa rau cov qauv. Kev rho tawm cellulose ntshiab los ntawm paj rwb suav nrog kev sib cais cov cellulose fibers ntawm lwm yam khoom ntawm cov nroj tsuag paj rwb, xws li lignin, hemicellulose, thiab pectin.
Kev Tshawb Fawb Txog Paj Rwb
Kev nkag siab txog lub cev ntawm cov nroj tsuag paj rwb yog qhov tseem ceeb rau kev rho tawm cellulose. Cov xov paj rwb yog cov noob trichomes, uas tsim los ntawm cov hlwb epidermal ntawm cov noob paj rwb. Cov xov no feem ntau yog cellulose, nrog rau cov protein me me, waxes, thiab suab thaj. Cov xov paj rwb loj hlob hauv cov pob, uas yog cov tshuaj tiv thaiv uas qhwv cov noob.
Cov txheej txheem rho tawm cellulose
Kev Sau Qoob Loo: Cov txheej txheem pib nrog kev sau cov noob paj rwb uas loj hlob ntawm cov nroj paj rwb. Kev sau qoob loo siv tshuab yog txoj kev siv ntau tshaj plaws, uas cov tshuab tshem cov noob paj rwb tawm ntawm cov nroj tsuag.
Kev txiav cov paj rwb: Tom qab sau qoob loo, cov paj rwb yuav raug txiav cov noob tawm ntawm cov xov paj. Cov txheej txheem no suav nrog kev xa cov paj rwb mus rau hauv lub tshuab txiav cov noob tawm ntawm cov xov paj.
Kev Ntxuav: Thaum twg muab cov noob cais tawm lawm, cov xov paj rwb yuav raug ntxuav kom tshem tawm cov av qias neeg xws li av, nplooj, thiab lwm yam khoom siv hauv tsob ntoo. Cov kauj ruam no ua kom ntseeg tau tias cov cellulose uas tau rho tawm ntawd muaj qhov huv siab.
Kev Sib Nqus: Kev sib nqus yog ib qho txheej txheem siv tshuab uas sib dhos cov xov paj rwb ua ib daim nyias nyias. Nws tshem tawm cov khoom tsis huv uas tseem tshuav thiab sib dhos cov xov paj rwb kom npaj rau kev ua tiav ntxiv.
Kev tshem cov roj hmab: Cov xov paj rwb muaj cov khoom tsis huv xws li cov quav ciab, pectins, thiab hemicelluloses, hu ua "gum." Kev tshem cov roj hmab cuam tshuam nrog kev kho cov xov paj rwb nrog cov kua alkaline lossis cov enzymes kom tshem tawm cov khoom tsis huv no.
Kev Ua Dawb: Kev ua dawb yog ib kauj ruam xaiv tau tab sis feem ntau siv los ntxuav cov cellulose fibers ntxiv thiab txhim kho lawv cov dawb. Ntau yam tshuaj dawb xws li hydrogen peroxide lossis chlorine derivatives yuav siv tau rau hauv cov txheej txheem no.
Kev Sib Txuas Lus: Kev sib txuas lus suav nrog kev kho cov cellulose fibers nrog cov kua qaub alkali caustic, feem ntau yog sodium hydroxide. Cov txheej txheem no ua rau cov fibers muaj zog, ci ntsa iab, thiab sib raug zoo rau cov xim, ua rau lawv tsim nyog rau ntau yam kev siv.
Acid Hydrolysis: Qee zaum, tshwj xeeb tshaj yog rau kev lag luam, acid hydrolysis yuav raug siv los rhuav tshem cov cellulose mus rau hauv cov khoom me me, sib xws dua. Cov txheej txheem no suav nrog kev kho cov cellulose nrog cov kua qaub dilute nyob rau hauv cov xwm txheej tswj hwm kom hydrolyze cov glycosidic bonds, ua rau cov saw hlau luv dua lossis cellulose nanocrystals.
Ntxuav thiab Ziab: Tom qab siv tshuaj lom neeg, cov cellulose fibers raug ntxuav kom huv si kom tshem tawm cov tshuaj lom neeg lossis cov khoom tsis huv uas tseem tshuav. Tom qab ntawd, cov fibers raug ziab kom txog thaum cov dej noo txaus.
Cov ntawv thov ntawm Pure Cellulose
Cov cellulose ntshiab uas tau los ntawm paj rwb pom cov ntawv thov thoob plaws ntau yam lag luam:
Cov ntaub: Cov cellulose fibers raug tig mus rau hauv cov xov paj thiab woven rau hauv cov ntaub rau khaub ncaws, cov ntaub hauv tsev, thiab cov ntawv thov kev lag luam.
Ntawv thiab Ntawv: Cellulose yog ib feem tseem ceeb ntawm ntawv, ntawv, thiab cov khoom lag luam cardboard.
Biofuels: Cellulose tuaj yeem hloov pauv mus ua biofuels xws li ethanol los ntawm cov txheej txheem xws li enzymatic hydrolysis thiab fermentation.
Kev Lag Luam Khoom Noj thiab Tshuaj: Cov cellulose derivatives yog siv los ua cov thickeners, stabilizers, thiab emulsifiers hauv cov khoom noj thiab cov tshuaj.
Tshuaj pleev ib ce: Cov cellulose derivatives yog siv rau hauv cov tshuaj pleev ib ce thiab cov khoom siv tu tus kheej rau lawv cov khoom thickening thiab stabilizing.
Kev rho tawm cov cellulose ntshiab los ntawm paj rwb muaj ntau yam txheej txheem kho tshuab thiab tshuaj lom neeg uas tsom mus rau kev sib cais cov cellulose fibers ntawm lwm cov khoom ntawm cov nroj tsuag paj rwb thiab ua kom lawv huv. Kev nkag siab txog lub cev ntawm cov nroj tsuag paj rwb thiab siv cov txheej txheem tsim nyog xws li ginning, degumming, bleaching, thiab mercerization yog qhov tseem ceeb rau kev tau txais cov cellulose zoo. Cov cellulose ntshiab uas tau los ntawm paj rwb muaj ntau yam kev siv thoob plaws hauv kev lag luam, xws li cov ntaub thiab kev ua ntawv mus rau biofuels thiab tshuaj, ua rau nws yog cov khoom siv ntuj tsim uas muaj txiaj ntsig thiab muaj txiaj ntsig.
Lub sijhawm tshaj tawm: Plaub Hlis-25-2024