Los ntawm kev tsom xam thiab cov ntsiab lus ntawm lub cellulose kuaj cov lus hauv peb tshooj, cov lus xaus tseem yog raws li hauv qab no:
5.1 xaus lus
1. Cellulose eter rho tawm los ntawm cov khoom siv raw
(1) Cov Cheebtsam ntawm tsib cov khoom siv noo noo (noo noo, Ntoo zoo, cellulose, thiab peb tus sawv cev ntoo, thiab cov nplej sawv ntsug, tau xaiv.
Thiab bagAse los rho cellulose, thiab cov txheej txheem ntawm cellulose extraction tau ua kom zoo. Nyob rau hauv cov txheej txheem optimized, tus
Cov txheeb ze purity ntawm Lignocellulose, hom cell polulose thiab bagulose cellulose tau tag nrho 90%, thiab lawv cov qoob loo tau tag nrho 40%.
(2) Los ntawm kev tsom xam ntawm infrared spectrum, nws tuaj yeem pom tau hais tias tom qab kho, cov khoom cellulose tau muab rho tawm cov khaub noom nplej
Ntawm 1510 cm-1 (pob txha kev co ntawm Benzene nplhaib Benzene) thiab ib puag ncig 1730 CM-1 (ncab kev nqus cov roj ntsha tsis-conjugated carbonyl c = o)
Tsis muaj qhov siab tshaj plaws, qhia tau tias lub hnub ci thiab hmemicellulose nyob rau hauv cov khoom muab rho tawm tau muab tshem tawm, thiab cov cellulose tau muaj siab heev. los ntawm ntshav
Nws tuaj yeem pom los ntawm cov ntsiab lus nqus sab nraud uas cov txheeb ze ntawm Lignin txo qis txuas ntxiv tom qab kev kho mob, thiab UV nqus ntawm cov cellulose tsawg.
Cov tau txais kev nkhaus nkhaus tau ze rau Ultraviolet nqus kev nkhaus ntawm Potassium permanganate, qhia tau tias cov cellulose kuj zoo heev. los ntawm x
X-tshav rhawv tshuaj xyuas pom tias tus txheeb ze crystallinity ntawm tau cov khoom cellulose tau zoo heev.
2. Kev npaj cov cellulose neeg muaj kev pab cuam
(1) Tib qho kev sim siab tau siv los ua kom zoo dua cov alkali decrystallization pretreatment pretreatment pretricement pretricement pretricement pretricement pretricement pretricement pretricement pretricement Pret
Orthorogonal kev sim thiab ib qho kev sim ib leeg tau raug nqa tawm ntawm kev npaj ntawm CMC, HEC thiab HECMC los ntawm ntoo thuv ntoo alkali cellulose, feem.
optimization. Raws li cov txheej txheem npaj zoo npaj, cmc nrog Ds txog 1.237, HEC nrog MS txog MS txog 1.657 tau txais.
thiab Hecmc nrog DS ntawm 0.869. (2) Raws li cov tshuaj ntsuam ftir, piv nrog thawj ntoo thuv ntoo cellulose, carboxymethyl tau tas mus rau hauv lub cellulose ether cmc.
Nyob rau hauv lub cellulose ether hec, cov pab pawg hydrothleel tau txuas nrog; Nyob rau hauv lub cellulose ether hecmc, cov pab pawg hydrothleel tau ua tiav
Carboxymethyl thiab hydroxyethyl pawg.
(3) Nws tuaj yeem tau txais los ntawm H-NMR tsom xam tias hydroxyethyl pab pawg yog qhia rau hauv cov khoom HEC, thiab HEC tau txais los ntawm kev xam yooj yim.
MORPORRAXURRY NTAWM QHOV CHAW.
(4) Raws li XRD tsom xam, piv nrog thawj ntoo thuv ntoo cellulose, lub cellulose muaj neeg muaj kev pab hais tias cmc, HEC thiab Heecmc muaj a
Cov ntawv siv lead ua tag nrho cov hloov pauv mus rau Cellulose Hom II, thiab Crystallinity poob qis.
3. Daim ntawv thov ntawm cellulose ether muab tshuaj txhuam
(1) Cov khoom tseem ceeb ntawm thawj paste: SA, CMC, HEC thiab HECMC yog txhua lub ntsej muag pseudoplasthu kua, thiab
Lub pseudoplastic ntawm peb lub cellulose cov neeg ua kom zoo dua li tias ntawm, thiab piv nrog rau sa, nws muaj qhov ntau ntawm pvi tus nqi, uas yog qhov tsim nyog rau luam cov qauv.
Paj; Qhov kev txiav txim ntawm cov tshuaj txhuam tus nqi tsim ntawm plaub pastes yog: SA> CMCC> HEC; Cov dej tuav lub peev xwm ntawm cmc thawj muab tshuaj txhuam,
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Qhov sib xyaw ntawm urea thiab anti-staining ntsev s yog zoo ib yam li sa, thiab lub chaw tso khoom ruaj khov ntawm cmc thawj muab tshuaj txhuam tau zoo dua li SA, tab sis tus
Kev sib xyaw ntawm Hec cov nqaij nyoos yog qhov phem tshaj li ntawm saud;
Kev sib raug zoo thiab kev cia khoom ruaj khov ntawm sodium bicarbonate yog qhov phem dua li sa;
SA yog zoo sib xws, tab sis cov dej tuav lub peev xwm, sib xyaw nrog sodium bicarbonate thiab cia khoom ruaj khov ntawm heecmc nyoos muaj qis dua li sa. (2) luam tawm cov luam tawm ntawm cov tshuaj txhuam: CMC pom xim tawm los thiab permeability, luam ntawv, luam ntawv, thiab lwm yam piv rau SA.
thiab tus nqi depaste ntawm CMC zoo dua li ntawm SA; Qhov kev cuam tshuam depaste thiab luam ntawv kev xav tias HEC zoo ib yam li SA, tab sis cov tsos ntawm Hec yog qhov zoo dua li ntawm SA.
Xim ntim, permeability thiab xim nrawm nrawm rau kev txhuam yog qis dua li sa; Hecmc luam ntawv xav tias xim xim rau kev txhuam yog zoo ib yam li sa;
Cov tshuaj txhuam piv tau ntau dua li SA, tab sis cov xim muaj xim zoo nkauj thiab cov khoom muaj zog ntawm Hecmc yog qis dua SA.
5.2 Cov Lus Taw Qhia
Los ntawm daim ntawv thov cov txiaj ntsig ntawm 5,1 cellulose ovher pas tuaj yeem tuaj yeem tau txais, cellulose pas dej tuaj yeem siv tau nyob rau hauv active
Ze cov luam ntawv luam ntawv, tshwj xeeb tshaj yog anionic cellulose muaj kev hais ua. Vim tias cov lus qhia ntawm cov pab pawg Hydrophilic Carboxymethyl, tus rau-coj
Qhov kev sib tw ntawm cov pab pawg hydroxyl ntawm lub nplhaib, thiab tus nqi tsis zoo tom qab ionization nyob rau tib lub sijhawm, tuaj yeem txhawb qhov dyeing ntawm fibers nrog reactive dyes. Txawm li cas los xij, ntawm tag nrho,
Daim ntawv thov cov txiaj ntsig ntawm cellulose ether luam tawm cov muab tshuaj txhuam tsis zoo heev, feem ntau yog vim muaj kev hloov pauv ntawm cellulose ether.
Vim tias cov qib qis ntawm kev hloov pauv, kev npaj cov cellulose cov neeg muaj kev tsis txaus siab nrog kev hloov pauv siab los yog cov ntshav hloov pauv kom muaj kev kawm ntxiv.
Lub Sijhawm Post: Kaum-08-2022