当前位置: X-MOL 学术Cellulose › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Hydrophobic wood flour derived from a novel p -TsOH treatment for improving interfacial compatibility of wood/HDPE composites
Cellulose ( IF 4.9 ) Pub Date : 2020-02-12 , DOI: 10.1007/s10570-020-03046-4
Huiping Lin , Ran Li , Dehong Li , Zejie Huang , Junwu Pang , Xinxiang Zhang , Weikai Liu , Wenbin Yang

Abstract

The interfacial compatibility between wood and polymers of wood/plastic composite (WPC) has been widely investigated. However, the reported methods for improvement of interfacial compatibility almost utilized the compatibilizer. In this work, a compatibilizer-free method was applied to enhance the interfacial compatibility between wood flour (WF) and high-density polyethylene (HDPE). p-toluenesulfonic acid (p-TsOH) was used to selectively remove hemicelulose, which would significantly improve the hydrophobicity of WF. It was found that most hemicellulose (about 91%) and a small amount of lignin were solubilized from WF. The static water contact angle (WCA) of WF sheet was significantly increased from nearly 0° to 135.7°, indicating that the WF was converted from hydrophilic to hydrophobic. Scanning electron microscope (SEM) showed p-TsOH treatment of WF could effectively improve the interfacial bonding between the WF and HDPE. The composite with 50 wt% modified-WF (MWF) showed optimum mechanical properties with an increase of 33.5% and 38.7% in tensile strength and flexural strength, respectively, as compared to those of corresponding WF/HDPE composite.



中文翻译:

源自新型p -TsOH处理的疏水性木粉,可改善木材/ HDPE复合材料的界面相容性

摘要

木材与木材/塑料复合材料(WPC)的聚合物之间的界面相容性已得到广泛研究。但是,所报道的改善界面相容性的方法几乎利用了相容剂。在这项工作中,采用了无增容剂的方法来增强木粉(WF)和高密度聚乙烯(HDPE)之间的界面相容性。p -甲苯磺酸(p-TsOH)用于选择性去除半纤维素,这将显着提高WF的疏水性。发现大多数半纤维素(约91%)和少量木质素从WF中溶解。WF片材的静态水接触角(WCA)从近0°显着增加到135.7°,表明WF从亲水性转变为疏水性。扫描电子显微镜(SEM)表明,WF进行p -TsOH处理可以有效改善WF与HDPE之间的界面结合。与相应的WF / HDPE复合材料相比,具有50 wt%改性WF(MWF)的复合材料表现出最佳的机械性能,其抗张强度和弯曲强度分别提高了33.5%和38.7%。

更新日期:2020-02-12
down
wechat
bug