化学浆在 NMMO/H2O 中的溶胀行为及组分分离特性研究
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中图分类号：TS72 文献标识码：A DOI：10.11980/j.issn.0254-508X.2026.04.009
'tudy on the Sweling Behavior and Component Separation Characteristics of Chemical Pulp in NMMO/H2O
CHEN Peisi1ZHAO Jiawei1KONG Lingmei1CHENG Bowen'ZHANG Hongjie2.3*YANG Shuo1*
（1.SchlofLightIdustryecedEngineeingtateKeybfbsedFbeaterialsineileIdustryKef
performanceFibesWet-idNooenateralsanjinKeyboulpndPaperiajinUiesityfiene&echoojin
300457;2.inaoalulpdaerReachsteCoden；tioalEgerinLboulde Beijing，100102）
（ E-mail： hongjiezhang@cnppri.com；yangshuo1018@tust. edu.cn）
Abstract：Tissdtookbleachdbroadeafodchemicalpulpasthewmaterialandsystematicallyivestigatedthevaratiopaesf fiberdimensions，swellngdegree，solventuptake，andcomponentcontentofpulpintheNmethymorpholine-N-oxide/water（MO/H 24 ） system.The separation behavior and mechanisms of hemicellulose in chemical pulp under the NMMO/H 20 system were clarified. The resultsshowedtatNMMOcontentandtemperatureweretecoreparametesregulatingtheswelingehaviorofpulp.Theoptialsweingeffect was achieved at 1Oo ℃ with an NMMO mass fraction of 70% . The NMMO pretreatment process exhibited significant selective separation ofpulpcomponnts，ithteemicelloeemovalprocesssowingisticttidependence.Asubstantialamountofhemicelloeas dissolved within the initial 2 min of treatment，reducing its content in the pulp from 20.29% to 11.37% and enriching it to 98.22% in the filtrate.FurtheranalysisrevealedthatNMMOprimarilypromotesswelingthroughthphysicaldisruptionofthehydrogenbondnetworkbetwencellulose molecules，whilenosignificantchanges wereobservedinthechemicaltructureorcrystallineformofcelulose.
Keywords： chemical pulp； NMMO； swelling； hemicellulose;component separation
纤维素作为自然界中储量最丰富的可再生天然高分子物质，是生产Lyocell纤维的关键原料。（剩余11135字）