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时间:2020-03-27
《预处理对PE-HD花生壳木塑复合材料性能的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第43卷,第9期工程塑料应用、,01·43·No·9192015年9月ENGINEERINGPLASTICSAPPLICATIONSept.2015—doi:lO.3969/j.issn.1001-3539.2015.09.004预处理对PE.HD/花生壳木塑复合材料性能的影响舟姚雪霞,戴存礼1,2,傅雷鸣,刘玉涛,何春霞(1.南京农业大学工学院,南京21003I;2.江苏省智能化农业装备重点实验室,南京210031)摘要:为了改善花生壳与高密度聚乙烯(PE.HD)基体的界面相容性,分别采用5%NaOH,5%HAc及高温和微波水浴四种方式对花生壳粉进行
2、预处理,再用硅烷偶联剂KH550处理花生壳粉,用模压方法制备成PE.HD/花生壳木塑复合材料。通过对花生壳粉进行化学成分和x射线衍射分析表明,各种预处理均提高了花生壳粉中纤维素的含量,降低了半纤维素和木质素的含量,且提高了纤维素的相对结晶度。通过对PE.HD/花生壳木塑复合材料力学性能和吸水性能的分析表明,大部分复合预处理改善了木塑复合材料的力学性能和防水性能。其中用NaOH和硅烷偶联剂KH550复合预处理对木塑复合材料的力学性能和防水性能改善效果最明显,与只用KH550处理的木塑复合材料相比,其弯曲强度提高了26.2%,冲击强度提高了62.1%,浸泡
3、192h的吸水率由14.9%降低为4.1%。这主要是因为NaOH预处理对花生壳粉的性能改变最显著,导致花生壳粉和PE.HD的界面相容性明显提高。关键词:花生壳;PE.HD;预处理;界面改性;木塑复合材料中图分类号:TB332文献标识码:A文章编号:1001.3539(2015)09.0019.07EffectofPretreatmentonPropertiesofPE—HD/PeanutShellWoodPlasticCompositesYaoXuexia一。DaiCunli一,FuLeiming一,LiuYutao一,HeChunxia,(1.Col
4、legeofEngineering,NanjingAgriculturalUniversity,Nanjing21003l,China;2.JiangsuKeyLaboratoryforIntelligentAgnculturalEquipment,Nanjing210031,China)Abstract:ToimprovetheinterfacecompatibilitybetweenpeanutshellandPE-HDmatrix,thepeanutshellpowderwastreatedby5%Na0H,5%HAc,hightemperatu
5、reandmicrowaverespectively,thentreatedbysilanecouplingagentKH550.ThePE-HD/peanutshellwoodplasticcompositeswerepreparedbyblendingwithPE-HDandpeanutshellthroughmolding.ThroughchemicalcompositionandX—raydiffractionanalysisofthepeanutshellpowder.itisfoundthatdiferentkindsofpretreatm
6、entsallincreasethecontentofcellulose,decreasethecontentofhemicelluloseandlignin,andincreasethedegreeofrelativecrystallinityofcellulose.ThemechanicalpropertiesandwaterabsorptionperformanceofthePE-HD/peanutshellwoodplasticcompositeswereinvestigated.Theexperimentalresultsshowthatmo
7、stpretreatedmethodsimprovethemechanicalpropertiesandwaterproofperformanceofthecomposites.Inaddition,thecompositepreparedwithNaOHandKH550hasbestcomprehensiveperformance.ComparedwiththatofthecompositesonlypreparedbyKH550,thebendingstrengthofthecompositespretreatedbyNaOHandKH550enh
8、ancesby26.2%,theimpactstrengthincreasesby62.1%,
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