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ID:34311402
大小:265.65 KB
页数:7页
时间:2019-03-04
《Evaluating the surface energy of laboratory-made papersheets by contact angle measurements.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、PEER-REVIEWEDHANDSHEETSEvaluatingthesurfaceenergyoflaboratory-madepapersheetsbycontactanglemeasurementsISABELMOUTINHO,MARGARIDAFIGUEIREDOANDPAULOFERREIRAABSTRACT:Contactangleisoneofthemostusefultoolstoeasilyassessthesurfaceenergyofpapersheets.However,theresultsobtainedshouldbetreatedwithso
2、mecaution,sincethesemeas-urementsaresignificantlyinfluencedbythepropertiesoftheliquidsusedandofthepapersurface.Ourstudycomparesthevaluesofthecontactangleandofthesurfaceenergyoflaboratoryhand-sheetsproducedwithdemineralizedwaterandwithwhitewater(collectedfromthepapermill).Inaddition,andtoas
3、sesstheinfluenceofpaperroughnessonthecontactanglemeasurements,some3-Dtopographicalparameterswerecomputedbyperfilometry.Complementarymeasurementswerealsoperformedwithcommercialpapersamples.Theresultsclearlydemonstratethatthekindofwaterusedinthesheet-makingprocesshasamorepronouncedinfluenceo
4、nthesurfaceenergyofthepapersheetsthanwhetherthepapersheetsweremadeinalaboratorysheetformerorinanindustrialpapermachine.Application:Thisstudyclarifiesfactorsthathaveinfluenceonthepracticaldeterminationofthesurfaceenergyofpapersheetsbycontactanglemeasurements.Theresultsshowtheinfluenceofthew
5、aterusedinthesheet-makingprocessonthesurfaceenergyofpapersheetsandarespeciallyuse-fulforexperimentscarriedoutinthelaboratory.Formanypapergrades,particularlyequationsforthecalculationofsurfacemeasurementsobtainedinlaboratoryprintingandwritingpapers,theenergycomponents[3-5].Nonetheless,hands
6、heetspreparedwiththesamephysicalandchemicalsurfacecharac-themeasurementofthecontactanglepulpfurnish,butusingtwodifferentteristicsareofutmostimportancedependsonmanyfactorsrelatedtothekindsofwater:demineralizedwater(asbecauseoftheirinfluenceonink-paperstructureandtothepropertiesofiscommonpra
7、cticeinlaboratory)andpaperinteractions,namelywetting,theliquidsthatareused.Althoughsomewhitewatercollectedfromapapermilladhesion,andabsorption[1,2].relevantstudiescanbefoundinthelit-circulationwatersystem.WealsotestedTherefore,itiscrucialtoassesstheerature,man
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