简介：Chitosan/cellulosenanocrystals(CS/CNCs)composites与计算机数值控制的不同内容被准备。由于计算机数值控制和计算机数值控制的同类的分散，CS的透明性很好被保留，CS的全面机械性质显著地被改进。而且，因为CS和计算机数值控制是biocompatible材料，获得的composites潜在地是noncytotoxic和罐头的房间增长测试表演满足生物医学的应用的安全要求。这些优点在商业塑料的地里铺平CS的潜在的应用的道路并且鼓励CS同样环境友好的材料和生物医学的材料的使用。

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简介：Theinteractionofanti-planeelasticSHwaveswithaperiodicarrayofinterfacecracksinamulti-layeredperiodicmediumisanalyzedinthispaper.AperfectperiodicstructurewithoutinterfacecracksisfirststudiedandthetransmissiondisplacementcoefficientisobtainedbasedonthetransfermatrixmethodinconjunctionwiththeBloch-Floquettheorem.Thisisthengeneralizedtoasingleandperiodicdistributionofcracksatthecenterinterfaceandtheresultiscomparedwiththatofperfectperiodiccaseswithoutinterfacecracks.Thedependenceofthetransmissiondisplacementcoefficientonthefrequencyoftheincidentwave,theinfluencesofmaterialcombination,crackconfigurationandincidentanglearediscussedindetail.Comparedwiththecorrespondingperfectperiodicstructurewithoutinterfacecracks,anewphenomenonisfoundintheperiodiclayeredsystemwithasingleandperiodicarrayofinterfacecracks.

简介：HotcompressionbehaviorofTiC–Al2O3/AlcompositeswasstudiedusingtheGleeble-1500systematatemperaturerangeof300–550°Candatstrainraterangeof0.01–10.00s-1.TheassociatedstructuralchangeswerestudiedbyTEMobservations.Theresultsshowthatstressleveldecreaseswithdeformationtemperatureincreasingandstrainratedecreasing,whichcanberepresentedbyaZener–Hollomonparameterinanexponent-typeequationwithhotdeformationactivationenergyQof172.56kJ·mol-1.Dynamicrecoveryoccurseasilywhenstrainratesarelessthan10.00s-1.Dynamicrecrystallizationcanoccuratstrainrateof10.00s-1.

简介：在这个工作，flame-retardant聚丙烯(PP)/ramie纤维(RF)合成被准备。苎麻纤维被生产经由的包含磷、包含氮的火焰retardant(FR)化学上包在situ冷凝作用反应以便压制他们的烛蕊效果。红外线的光谱学(FTIR)，X光检查光电子光谱学(XPS)和扫描电子显微镜学(SEM)表明了的Fourier变换苎麻纤维由FR(FR-RF)化学上包了，这成功地被获得。Thermogravimatric测试证明PP/FR-RF合成比PP/RF在高温度有更多的残余和更好热的稳定性合成。锥热量计(CC)结果显示热版本率(PHRR)和全部的热版本(THR)的山峰相应地与整洁的PP/RF的价值相比在23.4%和12.5%减少了。PP/FR-RF合成在燃烧以后创造了连续、紧缩的字符层。在有热传导系数的CC测试以后的字符残余的联合FTIR分析结果，RF上的FR的charring极大地削弱了RF的烛蕊效果，这能被结束，并且在RF域的更多的字符残余在整个燃烧地区便于更多的连续、紧缩的字符层的形成，因而在燃烧期间保护了PPcomposites，导致比PP/RF的合成的PP/FR-RF的更好的火焰retardancy合成。

简介：Inthisarticle,nano-scaleAl/Fe2O3compositeswithdifferentmorphologiesweresuccessfullyobtainedbyasimpleelectrospinningtechnique,whichisbasedonasurfactant（polyvinylpyridine,PVP）inamixtureofN,N-dimethylformamide（DMF）and2-propanol.TheelectrospunAl/Fe2O3compositesexhibitedacrystalstructureandphasecompositionbyX-raydiffractionanalysis.ThedifferentmorphologiesoftheAl/Fe2O3compositeswerealsoobservedthroughscanningelectronmicroscopyandtransmissionelectronmicroscopy.Itwasfoundthattherathersimpleelectrospinningmethodusedtopreparethemorphology-controlledAl/Fe2O3compositesmayhavethepotentialforpreparationofpropellants,explosives,andpyrotechnicsinthefuture.

简介：ToimprovethemechanicalpropertiesofWC-Al2O3composites,theeffectsoftraceamountofCeO2additivesonthemicrostructureandmechanicalpropertiesoftheWC-Al2O3compositespreparedbyhotpressingwereinvestigated.TheresultsrevealedthattheWC-Al2O3compositesdopedwith0.1%CeO2possessedrefinedmicrostructureandenhancedmechanicalpropertiescomparedwiththatoftheundopedWC-Al2O3composites.TraceCeO2suppressedthedecarburizationofWC,promotedthemicrostructuralrefinement,andimprovedtheinterfacecoherenceoftheWCmatrixandAl2O3.When0.1%CeO2wasaddedtotheWC-Al2O3composites,theeffectofCeO2resultedintheachievementofarelativedensityof98.82%withanexcellentVickershardnessof16.89GPa,combiningafracturetoughnessof9.85MPa·m1/2withanacceptableflexuralstrengthof1024.05MPa.

简介：AseriesofCd1-xZnxS/K2La2Ti3O10compositesweresynthesizedviaasimpleco-precipitationmethod.ThepreparedsampleswerecharacterizedbyX-raydiffraction（XRD）,scanningelectronmicroscopy（SEM）,X-rayenergydispersivespectroscopy（EDX）,ultraviolet-visiblediffusereflection（UV-Vis）,X-rayphotoelectronspectroscopy（XPS）andphotoluminescence（PL）measurements.ThecompositestructuresconsistedofCd1-xZnxSnanoparticlesevenlydistributedonthesurfaceofK2La2Ti3O10.TheabsorptionedgeofK2La2Ti3O10shiftedtothevisiblelightregionuponintroductionoftheCd1-xZnxSnanoparticles.Thephotocatalyticactivitiesofthecatalystswereevaluatedbyhydrogenproductionundervisiblelightirradiation.ThepreparedCd0.8Zn0.2S（30wt%）/K2La2Ti3O10exhibitedhigherphotocatalyticactivity,evolving6.92mmol/gH2undervisiblelightirradiationfor3h.ThepromotedphotocatalyticactivityofthecompositeswasattributedtothesynergisticeffectbetweenCd1-xZnxSandK2La2Ti3O10,whichresultedinenhancedseparationofphotogeneratedelectronsandholes.