細(xì)菌纖維素的溶解與靜電紡絲工藝研究.pdf

1、南京理工大學(xué)碩士學(xué)位論文細(xì)菌纖維素的溶解與靜電紡絲工藝研究姓名：劉備備申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：高分子化學(xué)與物理指導(dǎo)教師：唐衛(wèi)華201203Abstract碩士論文AbstractAsanewmaterialgainedfrombio—fermentation，bacterialcellulose(Be)isappliedinmanya1“easincludingfoodindustry，medical，paperindustryanda

2、cousticsduetowhoseuniquephysicspropertiesandexcellentwaterholdingcapacityThepropertiesofBCincludingthesolutionindifferentsolventsandthesteadyrheologicalpropertiesofBCsolutionwithdifferentconcentrationswerestudiedinthisre

3、searchAndalsothenanofibermanufacturedthoughelectrospinningwasobservedbySEMThesolutionofBCindifferentsolventssuchasNMMO，LiCI／DMAc，AmimClandmixtureAmimCl／NMMOwasstudiedinthispartAndthesolutions、杭tlldifferentconcentrationof

4、BCwereobtainedinthispartwhichWaspreparedfornextparts(rheologicaltestandelectrospinning)neresultsshowedthatBCcallbedissolvedindifferentsolventwhichhaddifferentsolvotationpowerThelargestconcentrationofBCinNMMOwas6％(wt／wt)w

5、hichWas4％inAmimCl，4％inNMMO／AmimCland3％in“Cl／DMAcTheresultpresentedthatBCsolutionispseudoplasticfluidAndtheviscosityofBCsolutionincreased、析nlthereducingofshearrateorthereducingoftemperatureHoweverthedependencebetweenvisco

6、sityandconcentrationofBCsolutionshowedaopposedphenomenonThereisanegativelycorrelationbetweenstructureviscosityandtemperatureIncreasingofshearrateCallalsoreducethestructureviscosityHoweverthestructureviscosityreducedsligh

7、tlywhentheshearratefellbetween225SIand400S一Suchreductionbecamemuchlargeratshearrateupto400S～ViscosityactivityenergyofBCsolution謝tllhigherconcentrationwaslowerViscosityactivityenergyofBCsolutionwithdifferentconcentrations

8、(O5％，1O％，30％，35％)is28506104kJ，23959104kJ，23268104kJand19166x104kJ，respectivelyBCnanofiberswereobtainedfromBC／AmimClsolutionandBC／NMMO／AmimCIsolutionbyelectrospinningfromhomemadeequipmentAndthedependencesbetweenthemorphol

9、ogyofnanofibersandprocessingfactorssuchaSconcentrationofBCsolutiondistance，voltageandweightratiobetweenNMMOorAmimClwithBCwereinvestigatedbySEMimagesTheresultsshowedthatdiameterofnanofiberis5岬whentheconcentrationis2O％，how

10、evernonanofiberWasobtainedwhentheconcentrationiS05％ThediameterofnanofiberincreasedwitllincreasingelectrospinningdistanceTheratioofsolventcouldalsoaffectthemorphologyofnanofiberTheaveragediameterofBCnanofiber(2％，AmimCl／NM