3D-Printed PLA Filaments Reinforced with Nanofibrillated Cellulose

作     者：Matea Perić Robert Putz Christian Paulik 

作者机构：Wood K Plus-Competence Center for Wood Composites&Wood ChemistryKompetenzzentrum Holz GmbHLinzA-4040Austria Institute for Chemical Technology of Organic MaterialsJohannes Kepler University LinzLinz4040Austria 

出 版 物：《Journal of Renewable Materials》 (可再生材料杂志（英文）)

年 卷 期：2020年第8卷第7期

页      面：759-772页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：This work was conducted within the scope of the INTERREG Österreich—Bayern 2014–2020 project 

主　　题：Nanofibrillated cellulose enzymatic hydrolysis twin screw extruder poly(lactic acid) 3D-printing 

摘      要：In the current study poly(lactic acid)PLA composites with a 3 wt%and 5 wt%of nanofibrillated cellulose(NFC)were produced by 3D-printing *** enzymatic pretreatment coupled with mechanical fibrillation in a twin screw extruder was used to produce high consistency *** electron microscopy(SEM)equipped with Fibermetric software,FASEP fiber length distribution analysis,Furrier transform infrared spectroscopy(FT-IR),thermogravimetric analysis(TGA),tensile tests,impact tests and differential scanning calorimetry were used to characterize NFC and PLA/NFC *** results of the fiber length and width measurements together with the results of the SEM analysis showed that enzymatic hydrolysis coupled with a twin screw extrusion could effectively reduce the diameter and length of cellulose *** produced NFC consisted of microand nanosized fibers entangled in a characteristic *** on the FT-IR analysis,no new bonds were formed during the enzymatic hydrolysis or fibrillation *** TGA analysis confirmed that produced NFC can be used in hightemperature extrusion processing without NFC *** the PLA/NFC composites preparation the NFC agglomerates were formed,which negatively influenced PLA/NFC composites impact *** slightly improved tensile strength and elastic modulus were reported for all composites when compared to the neat *** elongation at break was not affected by the NFC *** significant differences in thermal stability were detectable among composites nor in comparation with the neat ***,the crystallinity degree of the composite containing 5 wt%NFC was increased in respect to the neat PLA.