射頻和微波熱處理應(yīng)用于亞麻原莖脫膠的試驗(yàn)研究.pdf

1、分類(lèi)號(hào)TS123學(xué)校代碼10129UDC677.1.3學(xué)號(hào)2011305001射頻和微波熱處理應(yīng)用于亞麻原莖脫膠的試驗(yàn)研究ExperimentalStudyonApplicationofRadioFrequencyMicrowaveHeatingintoRettingofFlaxStraws申請(qǐng)人：阮培英學(xué)科門(mén)類(lèi)：工學(xué)學(xué)科專(zhuān)業(yè)：農(nóng)業(yè)機(jī)械化工程研究方向：農(nóng)業(yè)廢棄物料的處理與利用指導(dǎo)教師：杜健民教授G.S.V.Raghavan教授(加拿大麥

2、吉爾大學(xué))論文提交日期：二〇一五年六月ExperimentalStudyonApplicationofRadioFrequencyMicrowaveHeatingintoRettingofFlaxStrawsAbstractFlaxfiberislargelyusedintextilecompositesindustries.Rettingofflaxstrawswhichistheveryfirststeptomanufacturef

3、ibersisvitaltodeterminefibersquality.Indertoimproverettingefficiencywhileguaranteeingfiberspropertiesradiofrequency(RF)microwave(MW)heatingtechnologywereappliedintoflaxwaterenzymaticrettingrespectivelyinthiswk.Byevaluati

4、ngtherettingqualitywhichincludedrettingefficiencyofflaxstrawspropertiesoffibesobtaineditwasconcludedthattheapplicationofRFMWintorettingimprovedtherettingefficiencysignificantlyobtainedflaxfiberswithreasonableapparentmech

5、anicalproperties.Thiswkcouldprovidesomeinfmationffurturewkintoimprovingrettingqualityshteningrettingperiodbyusingdielectricheating.FirstlyRFwasintroducedtoassistflaxwaterrettingofdifferentstages.Therettingqualitiesofpure

6、waterrettingRFassistedwaterrettingwerestudied.TheconclusionshowsthatRFtreatmentat40C90Cf60minutesshouldbetheoptimalconditionftheflaxwhichhadundertaken2days610daysofwaterrettingrespectivelytogetmaximumimprovementinretting

7、efficiencybetterapparentmechanicalpropertiesoffibers.Consideringbothrettingqualityrettingperiodsixdaywasappropriatewaterrettingduration90C60minwouldbeitsbestRFtreatment.RFMWwerethenusedrespectivelyasthepretreatmentfflaxe

8、nzymaticretting.Basedontherettingefficiencyflaxstrawspresoakedf8hoursthenRFMWtreatedf30minutesgotlargerweightlossrettingdegreeimprovementinrettingefficiencycomparedtojustenzymaticrettingtheresultingflaxfibersyieldedbette

9、rwhitenesslineardensitybutgotimpairedtensileproperties.ComparedwithRFMWpreatmentseemedtoprevailalittlebittoobtainbetterenzymaticrettingquality.ItwasfoundthatthewayRFMWfunctioninginrettingwasacombinedeffectoneitherpolarpe

10、ctincellulosemolecules.RFMWtreatmentwasa―doubleedgedswd‖whichhelpeddegradationofpectintherfeimprovedtherettingefficiencybutimpairedfiberstensilepropertiesduetoweakeningthechainsofcellulosemoleculesthroughtheirpolarizatio