功能化木粉/低密度聚乙烯热塑母料的制备及界面融合性  

Preparation and interface fusion behaviors of functionalized wood powder/low density polyethylene thermal plastic masterbatch

作　　者：孙恩惠[1,2] 孙丰文[2,3] 刘欢欢[2] 鹿甫坤 黄红英[1] 武国峰[1] 

机构地区：[1]江苏省农业科学院农业资源与环境研究所,南京210014 [2]南京林业大学材料科学与工程学院,南京210037 [3]南京林业大学(泗阳)杨木加工利用技术研究院,泗阳223700

出　　处：《复合材料学报》2016年第7期1446-1453,共8页Acta Materiae Compositae Sinica

基　　金：江苏省产学研联合创新基金(BY2011013);江苏省农业自主创新项目(CX(12)1002);苏北科技专项(富民强县)(BN2015144)

摘　　要：以研究功能化木粉/低密度聚乙烯(LDPE)热塑母料的流变及界面融合性为目的,采用超声波辅助碱预处理制备苄基化杨木粉(Wd-Ar),通过熔融共混挤出造粒制备了Wd-Ar/LDPE热塑母料。研究Wd-Ar/LDPE热塑母料界面相容性、熔体流动性、热软化点、热融合特性以及表面自由能的变化。结果表明:SEM显示,与未处理木粉(Wd)相比,塑化母料与LDPE的界面融合性增强;由XRD结果分析可知热塑母料结晶度减弱,热软化点有所降低,熔体流动速率提高,总表面自由能下降,非极性分量自由能增加;Wd-Ar可降低与LDPE混合物料的平衡扭矩,有效改善复合材料的熔体加工性能、界面融合性及力学性能。当LDPE含量为20wt%时,Wd-Ar/LDPE复合材料的拉伸强度、拉伸断裂伸长率及弯曲强度分别提高了2.55、4.55和2.27倍,表明Wd-Ar与LDPE复合材料间的界面黏结性增强。With the purpose to study the rheological behavior and interface fusion of functionalized wood powder/low density polyethylene （LDPE）thermal plastic masterbatch,benzylation poplar wood powder（Wd-Ar）was syn-thetized after alkali pretreatment with ultrasonic-assisted,then Wd-Ar/LDPE thermal plastic masterbatch were pre-pared by co-blend and extrusion method.The variations on interfacial compatibility,thermal melt flowability,ther-mal softening point,heating fusion features and changes of surface free energy of Wd-Ar/LDPE thermal plastic mas-terbatch were examined.Results show that,compared with that of untreated wood flour （Wd）,SEM shows the en-hanced interface integration of plastic masterbatch and LDPE.XRD result analysis shows that crystallinity of ther-mal plastic masterbatch decreases,thermal softening point decreases,melt flow rate improves,total surface free en-ergy decreases,nonpolar component free energy increases.Wd-Ar is more effective in reducing the balance torque of LDPE combined materials,while improving melt processing performance,interface integration and mechanical prop-erties of the composites effectively.When the content of LDPE is 20wt%,the tensile strength,breaking elongation and flexural strength of Wd-Ar/LDPE composite increase by 2.55,4.55 and 2.27 times,respectively,which indi-cate that the interface bond abilities between Wd-Ar and LDPE increase.

关 键 词：苄基化木粉 低密度聚乙烯 热塑母料 复合材料 界面融合 

分 类 号：TB332[一般工业技术—材料科学与工程]