Montava-Jordà Sergi, Quiles-Carrillo Luis, Richart Nuria, Torres-Giner Sergio, Montanes Nestor
Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain.
Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish National Research Council (CSIC), Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Spain.
Polymers (Basel). 2019 Apr 30;11(5):758. doi: 10.3390/polym11050758.
Novel green composites were prepared by melt compounding a binary blend of polylactide (PLA) and poly(ε-caprolactone) (PCL) at 4/1 (wt/wt) with particles of walnut shell flour (WSF) in the 10-40 wt % range, which were obtained as a waste from the agro-food industry. Maleinized linseed oil (MLO) was added at 5 parts per hundred resin (phr) of composite to counteract the intrinsically low compatibility between the biopolymer blend matrix and the lignocellulosic fillers. Although the incorporation of WSF tended to reduce the mechanical strength and thermal stability of PLA/PCL, the MLO-containing composites filled with up to 20 wt % WSF showed superior ductility and a more balanced thermomechanical response. The morphological analysis revealed that the performance improvement attained was related to a plasticization phenomenon of the biopolymer blend and, more interestingly, to an enhancement of the interfacial adhesion of the green composites achieved by extrusion with the multi-functionalized vegetable oil.
通过在4/1（重量/重量）的聚乳酸（PLA）和聚（ε-己内酯）（PCL）二元共混物中熔融共混10-40重量%范围内的核桃壳粉（WSF）颗粒制备了新型绿色复合材料，这些颗粒是从农业食品工业废弃物中获得的。在每百份树脂（phr）的复合材料中添加5份马来化亚麻籽油（MLO），以抵消生物聚合物共混物基体与木质纤维素填料之间固有的低相容性。尽管加入WSF往往会降低PLA/PCL的机械强度和热稳定性，但填充高达20重量%WSF的含MLO复合材料表现出优异的延展性和更平衡的热机械响应。形态分析表明，性能的提高与生物聚合物共混物的增塑现象有关，更有趣的是，与通过多功能植物油挤出实现的绿色复合材料界面粘附力的增强有关。
