Kev tsom xam ntawm kev faib khoom hloov chaw hauv cellulose neeg muaj neeg

Kev txheeb xyuas cov khoom xa tuaj hloov pauv ntawmNeeg muaj neeg ua haujlwmYuav koom nrog kev kawm seb thiab nyob qhov twg cov hydroxymethyl, hydroxyprropyl, lossis lwm yam hloov chaw tau faib rau ntawm cellulose saw. Kev faib tawm cov kev cuam tshuam ntawm cov khoom seem thiab ua haujlwm ntawm cellulose cov neeg muaj cai, muaj kev cuam tshuam rau solubility, viscosity, thiab reactivity. Nov yog qee txoj hauv kev thiab kev txiav txim siab rau kev txheeb xyuas chaw xa khoom tuaj yeem xa tawm:

1. Nuclear Sib Nqus Sib Txawv (NMR) Spectroscopy:
   • Txoj Kev: NMR spectroscopy yog ib cov txheej txheem muaj zog rau elucidating cov qauv tshuaj ntawm cov neeg hais txog cellulose. Nws tuaj yeem muab cov ntaub ntawv hais txog kev faib cov khoom xa tuaj raws cov saw polymer.
   • Kev Ntsuam Xyuas: Los ntawm kev tshuaj xyuas NMR Spectrum, ib qho tuaj yeem txheeb xyuas hom thiab qhov chaw nyob ntawm qhov chaw hloov pauv (DS) ntawm lub cell caj qaum.
2. Infrared (ir) spectroscopy:
   • Txoj kev: IR Spectroscopy tuaj yeem siv los soj ntsuam cov pab pawg ua haujlwm nyob hauv cov cellulose neeg.
   • Kev Ntsuam Xyuas: Kev nqus cov khau ua tau zoo tshwj xeeb hauv IRTRRUM tuaj yeem qhia tau tias muaj kev hloov chaw. Piv txwv li, muaj cov hydroxyethyl lossis cov pab pawg carboxymethyl tuaj yeem txheeb tau los ntawm cov xeeb ceem peaks.
3. Qib ntawm kev hloov pauv (DS) kev txiav txim siab:
   • Txoj kev: DS yog qhov tseeb ntsuas ntsuas ntawm cov nruab nrab ntawm cov neeg hloov chaw nyob rau ib chav nyob hauv chav ua haujlwm hauv cellulose. Nws yog feem ntau txiav txim los ntawm kev tsom ntsuas tshuaj lom.
   • Kev tsom xam: ntau txoj kev siv tshuaj lom neeg, xws li cov ntu lossis chratography, tuaj yeem ua haujlwm los txiav txim rau DS. Cov tau txais Ds qhov tseem ceeb muab cov ntaub ntawv hais txog qib kev hloov pauv tag nrho tab sis yuav tsis muab kev faib tawm.
4. Molecular hnyav faib:
   • Txoj kev: gel permeation chromatography (GPC) lossis qhov loj me-cais cov tshuaj chromatography (sec) tuaj yeem siv los txiav txim siab cov tshuaj tua kab ntawm cellulose.
   • Kev Ntsuam Xyuas: cov molecular luj lub rooj sib npaug tau muab cov kev pom zoo rau cov tshuaj polymer ntev thiab seb lawv yuav sib txawv raws li kev xa tawm chaw.
5. Hydrolysis thiab ntsuas cov txheej txheem:
   • Txoj kev: Tshuaj tswj cov hydrolysis ntawm cov neeg hais ua cellulos los ntawm chromatographic lossis spectroscopic essioned.
   • Kev tsom xam: los ntawm xaiv hydrolyzing hydrolyzing hydrolyzing cov neeg tuaj yeem hloov kho, cov kws tshawb nrhiav tuaj yeem txheeb xyuas cov thooj kom to taub kom nkag siab txog kev xa tawm thiab muab cov khoom xa tuaj raws cov cellulose.
6. Kass spectrometry:
   • Txoj Kev: Pawg Spectrometry, xws li Maldi-Tof (Matrix-pab laser desorption / ionization sijhawm-ntawm-davhlau) MS, tuaj yeem muab cov ntaub ntawv ntxaws ntxaws txog cov molecular muaj pes tsawg leeg.
   • Kev Ntsuam Xyuas: Pawg Spectrometry tuaj yeem qhia tawm ntawm cov chaw xa khoom ntawm cov ntaub pua npab polymer, muab cov kev pom zoo rau hauv heterogeneity ntawm cov cellulose neeg muaj kev pab.
7. X-duab tshav crystallography:
   • Txoj kev: xoo hluav taws xob crystallogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrogrography tuaj yeem hais txog cov qauv peb-seem ntawm cov qauv ntawm cellulose.
   • Kev Ntsuam Xyuas: Nws tuaj yeem muaj kev nkag siab rau hauv kev npaj ntawm cov chaw nyob hauv thaj chaw muaj cov neeg muaj kev hais txog cellulose.
8. Xam piv ua qauv:
   • Txoj kev: molecular dynamics simulations thiab kev sib tham ua qauv tuaj yeem muab cov kev pom zoo rau hauv kev faib tawm ntawm cov khoom xa tuaj.
   • Kev tsom xam: los ntawm kev simulating tus cwj pwm ntawm cov neeg ua kom muaj kev ua kom muaj qib ntawm pawg, cov kws tshawb nrhiav tuaj yeem nkag siab txog qhov hloov chaw tau faib thiab cuam tshuam.

Kev muab cov lus faib tawm ntawm cellulose yog qhov ua haujlwm nyuaj uas feem ntau cuam tshuam nrog kev sim ua ke ntawm cov txheej txheem kev sim thiab theoretical qauv. Cov kev xaiv ntawm txoj kev nyob ntawm cov kev hloov pauv tshwj xeeb thiab cov qib ntawm xav tau rau kev tsom xam.