Cellulose, polymer organic kasị ukwuu n'ụwa, bụ akụkụ dị mkpa nke biomass na ihe mmepụta ihe dị iche iche.Iguzosi ike n'ezi ihe nhazi ya dị ịrịba ama na-ebute ihe ịma aka maka ndakpọ ya nke ọma, dị oke mkpa maka ngwa dị ka mmepụta biofuel na njikwa mkpofu.Hydrogen peroxide (H2O2) apụtala dị ka onye nwere ike ịgbasa cellulose n'ihi ọdịdị na-adịghị mma na gburugburu ebe obibi na ihe ndị na-emepụta oxidizing.
Okwu mmalite:
Cellulose, polysaccharide nke mejuputara nkeji glucose jikọtara ya na njikọ β-1,4-glycosidic, bụ akụkụ dị mkpa na mgbidi cell osisi.Uju ya na biomass na-eme ka ọ bụrụ ihe na-adọrọ adọrọ maka ụlọ ọrụ dị iche iche, gụnyere akwụkwọ na pulp, textiles na bioenergy.Agbanyeghị, netwọkụ hydrogen bonding siri ike dị n'ime fibrils cellulose na-eme ka ọ ghara ịgbasa n'ọtụtụ ihe mgbaze, na-ebute ihe ịma aka maka ojiji ya na imegharị ya nke ọma.
Ụzọ ọdịnala maka mgbasa cellulose na-agụnye ọnọdụ ndị siri ike, dị ka acids gbanyere mkpọrọgwụ ma ọ bụ mmiri ionic, nke a na-ejikọta ya na nchegbu gburugburu ebe obibi na oke ike oriri.N'ụzọ dị iche, hydrogen peroxide na-enye ihe ọzọ na-ekwe nkwa n'ihi ọdịdị oxidizing ya dị nro na ikike maka nhazi cellulose na gburugburu ebe obibi.Akwụkwọ a na-abanye n'ime usoro ndị na-ebute mgbasa cellulose na hydrogen peroxide na-enyocha ọrụ ya na ngwa bara uru.
Usoro nke mgbasa cellulose site na hydrogen peroxide:
Mgbasa nke cellulose site na hydrogen peroxide na-agụnye mmeghachi omume kemịkalụ dị mgbagwoju anya, nke bụ isi oxidative nkewa nke njikọ glycosidic na nkwụsị nke njikọ njikọ intermolecular hydrogen.Usoro a na-emekarị site na usoro ndị a:
Oxidation nke Hydroxyl Groups: Hydrogen peroxide na-emeghachi omume na ndị otu cellulose hydroxyl, na-eduga na nhazi nke hydroxyl radicals (•OH) site na Fenton ma ọ bụ Fenton-dị ka mmeghachi omume n'ihu nke mgbanwe metal ion.Radikal ndị a na-awakpo njikọ nke glycosidic, na-ebute mkpakọ agbụ na-emepụta iberibe cellulose dị mkpụmkpụ.
Nkwụsị nke Njikọ Hydrogen: Hydroxyl radicals na-akpaghasịkwa netwọk mmekọrịta hydrogen n'etiti ụdọ cellulose, na-ebelata nhazi n'ozuzu ya na ịkwado ngwọta.
Nhazi nke Soluble Derivatives: Mbibi oxidative nke cellulose na-ebute nguzobe nke etiti na-agbaze mmiri, dị ka acids carboxylic, aldehydes, na ketones.Mwepụta ndị a na-enye aka na usoro mgbasa site na ịba ụba solubility na ibelata viscosity.
Depolymerization na Fragmentation: Mgbakwunye oxidation na mmeghachi omume nbipu na-eduga na mkpochapụ nke agbụ cellulose n'ime obere oligomers na n'ikpeazụ na shuga soluble ma ọ bụ ngwaahịa ndị ọzọ dị obere.
Ihe Ndị Na-emetụta Mgbasa Cellulose Mgbasa Ọdịnaya Peroxide:
Ihe dị iche iche na-emetụta arụmọrụ nke mgbasa cellulose site na iji hydrogen peroxide, gụnyere:
Ntinye uche nke hydrogen peroxide: Ntụnye hydrogen peroxide dị elu na-ebutekarị mmeghachi omume ngwa ngwa yana mmebi cellulose sara mbara karị.Agbanyeghị, itinye uche dị elu nke ukwuu nwere ike ibute mmeghachi omume akụkụ ma ọ bụ ngwaahịa sitere na-adịghị mma.
pH na okpomọkụ: pH nke mmeghachi omume mmeghachi omume na-emetụta ọgbọ nke hydroxyl radicals na nkwụsi ike nke cellulose.A na-ahọrọkarị ọnọdụ acidic dị oke ala (pH 3-5) iji kwalite solubility cellulose na-enweghị mmebi dị ukwuu.Na mgbakwunye, okpomọkụ na-emetụta mmeghachi omume mmeghachi omume, yana okpomọkụ dị elu na-emekarị usoro mgbasa ozi ngwa ngwa.
Ọnụnọ nke ihe ndị na-eme ka a na-ahụ anya: ion ígwè mgbanwe, dị ka ígwè ma ọ bụ ọla kọpa, nwere ike ịkpata ire ere nke hydrogen peroxide ma kwalite mmepụta nke hydroxyl radicals.Otú ọ dị, nhọrọ nke catalyst na itinye uche ya ga-eji nlezianya mee nke ọma iji belata mmeghachi omume n'akụkụ ma hụ na ngwaahịa dị mma.
Cellulose Morphology na Crystallinity: Ịnweta ụdọ cellulose na hydrogen peroxide na hydroxyl radicals na-emetụta ọdịdị nke ihe na nhazi crystalline.Mpaghara amorphous na-enwekarị ike imebi karịa ngalaba kristal nke ukwuu, na-achọ usoro ọgwụgwọ ma ọ bụ usoro mgbanwe iji kwalite nnweta.
Uru na Ngwa nke Hydrogen Peroxide na Mgbasa Cellulose:
Hydrogen peroxide na-enye ọtụtụ uru maka mgbasa cellulose ma e jiri ya tụnyere ụzọ ndị a na-ahụkarị:
Ndakọrịta gburugburu ebe obibi: N'adịghị ka kemịkalụ siri ike dị ka sulfuric acid ma ọ bụ ihe mgbaze chlorinated, hydrogen peroxide dịtụ mma ma na-aghọ mmiri na oxygen n'okpuru ọnọdụ dị nro.Àgwà ọma a na gburugburu ebe obibi na-eme ka ọ dị mma maka nhazi cellulose na-adịgide adịgide na nhazi ihe mkpofu.
Ọnọdụ mmeghachi omume dị nro: Mgbasa cellulose na-agbapụta na hydrogen peroxide nwere ike ime n'okpuru ọnọdụ dị nro nke okpomọkụ na nrụgide, na-ebelata oriri ume na ụgwọ ọrụ ma e jiri ya tụnyere acid hydrolysis dị elu ma ọ bụ ọgwụgwọ mmiri ionic.
Nhọrọ Oxidation: Enwere ike ịchịkwa oxidative cleavage nke glycosidic bonds site hydrogen peroxide ruo n'ókè ụfọdụ, na-enye ohere maka mgbanwe nhọrọ nke cellulose chains na mmepụta nke ahaziri emepụta na kpọmkwem Njirimara.
Ngwa dị iche iche: Mwepụta cellulose soluble enwetara site na mgbasa mgbasa nke hydrogen peroxide nwere ike itinye n'ọrụ n'akụkụ dị iche iche, gụnyere mmepụta biofuel, ihe arụ ọrụ, ngwaọrụ biomedical, na ọgwụgwọ mmiri mkpofu.
Ihe ịma aka na ntụzịaka ga-eme n'ọdịnihu:
N'agbanyeghị àgwà ya ndị na-ekwe nkwa, mgbasa nke cellulose na-agbapụta na hydrogen peroxide na-eche ọtụtụ ihe ịma aka na ebe maka mmelite ihu:
Nhọrọ na Mpụta: Inweta nnukwu mkpụrụ nke mkpụrụ ndụ cellulose soluble na obere mmeghachi omume akụkụ ka bụ ihe ịma aka, ọkachasị maka nri nri biomass dị mgbagwoju anya nwere lignin na hemicellulose.
Ọnụ ọgụgụ nke elu na nhazi usoro: Ịkwalite usoro mgbasa nke cellulose dabeere na hydrogen peroxide na ọkwa mmepụta ihe chọrọ nlezianya nyochaa nhazi reactor, mgbake mgbaze, na usoro nhazi nke ala iji hụ na ike akụ na ụba na nkwado gburugburu ebe obibi.
Mmepe nke na-eme ihe: Nhazi nke ihe na-eme ka ọ dị mma maka ịgbalite hydrogen peroxide na cellulose oxidation dị mkpa maka ịkwalite ọnụego mmeghachi omume na selectivity ka ị na-ebelata ntinye ihe na-emepụta ihe na mmepụta site na ngwaahịa.
Valorization of Site-Products: Atụmatụ maka ịme ka ngwaahịa ndị a na-emepụta n'oge mgbasa nke cellulose na-agbapụta na hydrogen peroxide, dị ka acid carboxylic ma ọ bụ oligomeric sugars, nwere ike ime ka ọ dịkwuo elu na nkwado akụ na ụba nke usoro a.
Hydrogen peroxide na-ekwe nkwa dị ịrịba ama dị ka ihe mgbaze akwụkwọ ndụ akwụkwọ ndụ na nke na-agbanwe agbanwe maka mgbasa cellulose, na-enye uru dị ka ndakọrịta gburugburu ebe obibi, ọnọdụ mmeghachi omume dị nro, na oxidation nhọrọ.N'agbanyeghị ihe ịma aka na-aga n'ihu, mbọ nyocha na-aga n'ihu na-achọ ịkọwapụta usoro ndị dị n'okpuru, na-ebuli usoro mmeghachi omume, na nyocha ngwa ọhụrụ ga-eme ka ọ dịkwuo mma na nkwado nke usoro dabeere na hydrogen peroxide maka cellulose valorization.
Oge nzipu: Eprel-10-2024