纖維素復(fù)合酶系改性二次纖維紙漿.pdf

1、南京林業(yè)大學(xué)碩士學(xué)位論文纖維素復(fù)合酶系改性二次纖維紙漿姓名：呂進(jìn)申請學(xué)位級別：碩士專業(yè)：生物化工指導(dǎo)教師：余世袁20060601ModificationofsecondaryfiberpulpwithcellulasesLuJhaSupervisedbyProfessorYuShlyuan(CoDegeofChemicalEngineeringNanjingForestryUniversityNanjing210037)April200

2、6AbstractInthisworkeffectsofmodificationofsecondary—fiberpulpwithcellulasesonpulpdrainageandpapersheetswerestudied，theoptimalprocesswasworkedoutandonthebaseoftheoptimalprocess，effectsofsequencesofrefining，differentsecond

3、aryfiberpulpsanddifferentenzymesystemsonmodificationofSecondaryfiberwereresearchedThemainconclusionsareasfclllows：Withstudyingeffectsoffactorsnamedpulpconcentration，pH，temperature，dosagesofenzymeandtimeonmodificationofse

4、condaryfibertheconcludedoptimalprocessis35％pulpconcen扛afion，pH5060，50—60“C，03IU／govendriedpulpand1015hAftermodificationundertheoptimalconditions，SchopperRieglerisdecreasedby55。SR，breaklengthnearlyhavenochangebuttearindex

5、isdramaticallydamagedSequencesofrefiningaffectdrainageofcellulasemodifiedpulpAftermodification，refiningof1000and3000revolutionsimproveddrainageofpulpRespectivelySehopperRieglerweredecreasedby70。SRand68。SRbreaklength229％a

6、nd775％tearindex2616and751％Respectivelycomparedwithunrefinedpulp，SchopperRieg／eraredecreasedby45。SRand43。SR，breaklengthwereincreasedby735％and125％，buttearindexdecreasedby2239％and2390％Withrefiningof6000revolutionsaftermodif

7、icationandrefiningsbeforemodificationdrainageandsnengthpropertiesweredestroyedTypesofwastepaperisoneimportantfactoraffectingcellulasemodificationofsecondarypulpUnderthesameconditions。SchopperRieglerofONPWasdecreasedby113