Cellulose, polic polymer kwambiri padziko lapansi, amapanga gawo lalikulu la biomass ndi zida zosiyanasiyana za mafakitale. Umphumphu wake wopambana umakumana ndi mavuto chifukwa cha kusokonekera kofunikira, kofunikira ntchito monga kupanga ma biofu ndi kuwongolera zinyalala. Hydrogen Peroxide (H2O2) yatuluka monga momwe mungasungire chisudzo cha cellulose chifukwa cha chilengedwe chake chilengedwe.
Chiyambi:
Cellulose, polysaccharide yopangidwa ndi mayunitsi a shuga omwe amalumikizidwa ndi β-1,4-glycosidic, ndi chinthu chachikulu chopangidwa ndi makhoma a cell. Zambiri za biomass zimapangitsa kuti mafakitale osiyanasiyana azinthu zosiyanasiyana, kuphatikiza pepala ndi zamkati, zolembedwa, ndi bioenergy. Komabe, ma network a hydrogen omwe ali pachimake pa cellulose amatembenuza kuti athe kusagwirizana ndi kusungunuka kwakukulu, ndikupanga zovuta kugwiritsa ntchito bwino komanso kukonzanso.
Njira zachikhalidwe zosinthira cellulose zimaphatikizapo zovuta, monga acid acid kapena ionic amadzimadzi, omwe nthawi zambiri amagwirizanitsidwa ndi zovuta zachilengedwe ndi zodetsa zambiri zamagetsi. Mosiyana ndi izi, hydrogen peroxide imapereka njira ina yolozera chifukwa cha kuchuluka kwake kofananira ndi kuthekera kwa malo ochezera a cellulose. Pepala ili likufunanso magwiridwe antchito hydrogen peroxide - cellulose yopangidwa ndi cellulose ndikuwunika bwino komanso kugwiritsa ntchito ntchito zake.
Njira zamankhwala za cellulose ndi hydrogen peroxide:
Kufalikira kwa cellulose ndi hydrogen peroxide kumatanthauza kusintha kwamankhwala, makamaka zophatikizika za glycosiidic ndi kusokonezeka kwa kuphatikiza hydroleclan hydrogen. Njirayo imangochitika mwanjira zotsatirazi:
Maxidation a magulu a hydroxyl: hydrogen peroxide amakumana ndi magulu a celrouse, omwe amatsogolera ku ma hydroxyl ma radicals (• O) kudzera mu Fenton kapena Fenton-monga momwe amasinthira pazitsulo zamisinkhulidwe. Izi zimakhudza kugunda kwa glycosiidic, kuyambitsa chiwindi chaching'ono ndikupanga zidutswa zazifupi za cellulose.
Kusokonezeka kwa Hydrogen Counting: Hydroxyl kusokonezanso ma network omwe ali ndi ma cellulose pakati pa cellulose, ndikuchepetsa kapangidwe kake ndi kuwongolera.
Kupanga zosungunulira kusungunuka: kuwonongeka kwa oxiduction kwa cellulose kumapangitsa kuti apakati pa mapangidwe apakatikati, monga carboxyylic acids, adzimaloko, ndi ma kemoni. Izi zimathandizira kuti zisungunuke pogwiritsa ntchito kususuka ndikuchepetsa ufa.
Decolmermerization ndi kuphatikizidwa: Kusintha kwa maxidage ndi cleavage kumapangitsa kuti ma cellulose azikhala ndi maunyolo ndipo pamapeto pake amachepetsa thupi.
Zinthu zomwe zikukhudza hydrogen peroxide -
Mphamvu ya kuwonongeka kwa cellulose pogwiritsa ntchito hydrogen peroxide imakhudzidwa ndi zinthu zosiyanasiyana, kuphatikiza:
Kukhazikika kwa hydrogen peroxide: Kukhazikika kwamphamvu kwa hydrogen peroxide nthawi zambiri kumapangitsa kuti ma celsifesa azotheka kwambiri. Komabe, kukhazikika kwambiri kumatha kuyambitsa mavuto kapena zosayenera ndi zinthu.
PH ndi kutentha: PH of yomwe mwachitapo imathandizira m'badwo wa ma hydroxyl ma radicals komanso kukhazikika kwa cellulose. Mitundu ya acidic ya acidic (PH 3-5) nthawi zambiri amakondedwa kuti muchepetse kuwonongeka kwakukulu. Kuphatikiza apo, kutentha kumakhudzanso kinetics, chifukwa kutentha kwambiri kumathandizira kusungunuka.
Kukhalapo kwa othandizira: Kusintha kwa zitsulo zazitsulo, monga chitsulo kapena mkuwa, amatha kuthana ndi vuto la hydrogen peroxide ndikuwonjezera mapangidwe a hydroxyl. Komabe, kusankha kwa chothandizira komanso ndende yake kuyenera kukhala koyenera kuchepetsedwa kuchepetsedwa ndi kutsimikizira kuti malonda.
Celluluse Morphology ndi Crystalluty: Kupezeka kwa cellulose unyolo kwa hydrogen peroxide ndi hydroxyl ma radicals ndi mawonekedwe a marystology. Madera amorunous amatengeka ndi kuwonongeka kuposa madera ozungulira kwambiri, omwe amathandizidwa kapena njira zosinthira kuti muchepetse kupezeka.
Ubwino ndi ntchito za hydrogen peroxide mu cellulose zosungunuka:
Hydrogen Peroxide imapereka zabwino zingapo kwa cellulose zosungunuka poyerekeza ndi njira zachilendo:
Kuphatikizidwa kwa chilengedwe: Zosiyana ndi mitundu yankhanza monga sulfuric acid kapena ma solrogen peroxide ndizophatikizika ndi madzi komanso mpweya wofatsa pansi pamikhalidwe yofatsa. Chilengedwechi chilengedwechi chimapangitsa kuti ikhale yoyenera pokonza pafupipafupi pa cellulose ndikukonzanso zinyalala.
Miyezo Yofa Kwambiri: Hydrogen Peroxide - Celdrosen Telelide Wosungunuka limachitika pansi pamtunda wofatsa komanso kupanikizika, kuchepetsa kugwiritsa ntchito mphamvu komanso ndalama zogwirira ntchito poyerekeza ndi ma acid amadzimadzi.
Kusankha makodidwe: Chuma cha oxcosidic cha glycosidic chomangira ndi hydrogen peroxide chitha kuwongoleredwa pamlingo wina, kuloleza kusintha kwa maunyolo a cellulose ndi kupanga kwa zotumphukira zina.
Mapulogalamu osintha: zosungunuka pa cellulose zomwe zapezeka kuchokera ku matenda a hydrogen peroxide ali ndi ntchito zomwe zili m'minda yosiyanasiyana, kuphatikizapo kupanga ma biofu, ntchito, zida zamagetsi, ndikulandira zida zamadzimadzi.
Zovuta ndi Mayendedwe Amtsogolo:
Ngakhale kuti pali zinthu zabwino, ma hydrogen Peroxide, cellulose yokhazikika pa cellulose yofananira imakumana ndi zovuta zingapo komanso madera osintha:
Kusankha ndi Kutulutsa: Kukwaniritsa zokolola zapamwamba za cellulose zokhala ndi vuto limodzi, makamaka chifukwa cha ma feestock amadyera okhala ndi Lignalloul.
Kuphatikizika ndi Kutsatira: Kutulutsa mmwamba Hyidrogen Peroxide-celluuse yopanga mafakitale amafunikira kulinganiza kwa riyaction, ndi kutsitsa kwa mafakitale kuti mutsimikizire zachuma komanso kudalirika kwachilengedwe.
Chitani chothandizira: Kapangidwe ka zinthu zabwino kwambiri za hydrogen peroxide peroxide ndi chofunikira kuti muchepetse kuchuluka ndi kusankhidwa kwinaku mukuchepetsa kukweza ndi mapangidwe ake.
Kukula kwa zinthu zopangidwa ndi zinthu: Njira zochitira umboni zomwe zimapangidwa mu hydrogen peroxide ma cellulox, zomwe zimapangidwa ndi ma oligomeric, zitha kukulitsa njira yonse yodalirika komanso yazachuma.
Hydrogen peroxide imakhala ndi lonjezo lalikulu ngati chosungunulira chobiriwira komanso chosinthasintha kwa chisinthiko cha cellulose, zolimbitsa thupi monga kuchuluka kwa chilengedwe, mizere yofatsa, komanso yosankha ma okomation. Ngakhale panali zovuta zambiri, kuyesetsa kuchita kafukufuku yemwe anafuna kugwiritsa ntchito njira zogwiritsira ntchito, ndikuyang'ana magwiridwe antchito, ndipo amafufuza momwe amagwiritsira ntchito njira ndi kudalirika kwa njira za hydrogen.
Post Nthawi: Apr-10-2024