Sustainable Approach for Mechanical Recycling of Poly(lactic acid)/Cellulose Nanocrystal Films: Investigations on Structure-Property Relationship and Underlying Mechanism

被引：23
作者：
Dhar, Prodyut [1 ,2 ]
Kumar, Raiesh M. [3 ]
Bhasney, Siddharth Mohan [1 ]
Bhagabati, Purabi [1 ]
Kumar, Amit [1 ]
Katiyar, Vimal [1 ]
机构：
[1] Indian Inst Technol Guwahati, Dept Chem Engn, Gauhati 781039, Assam, India
[2] Aalto Univ, Sch Chem Engn, Dept Bioprod & Biosyst, POB 16300, Aalto 0076, Finland
[3] Bharathiar Univ, Dept Nanosci & Technol, Coimbatore 638752, Tamil Nadu, India
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2018年 / 57卷 / 43期
关键词：
POLY-LACTIC-ACID; REACTIVE EXTRUSION PROCESS; POLYLACTIC ACID; CELLULOSE NANOCRYSTALS; POLY(L-LACTIC ACID); THERMAL-STABILITY; NANOCOMPOSITES; BLENDS; FIBERS; MELT;
D O I：
10.1021/acs.iecr.8b02658
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
This paper presents a green and sustainable route for mechanical recycling of poly(lactic acid) (PLA)/cellulose nano crystal (CNC) based films multiple times, which results in enhanced thermal, rheological, and structural properties along with improved processability. Recycling of reactively extruded PLA/CNC films in the presence of dicumyl peroxide (DCP) was carried out with sulfuric and hydrochloric acid hydrolyzed CNCs (CNC-S and CNC-Cl). This shows improved thermal stability (improved by 12 degrees C), consistent M-w characteristics (180-150 kDa), and enhanced melt strength as evident from the thermal degradation studies and viscoelastic properties measured from rheological studies. The improved recyclability of PLA/CNC films was evident from enhanced complex viscosity and storage modulus of melt by similar to 4 and 10 times along with increased mechanical strength of similar to 16-30% even after the third recycling. Therefore, the present study provides a novel route to recycle PLA-based CNC films after their service life into value-added biodegradable products with adequate properties competitive enough to replace petroleum-based conventional plastics for commodity applications.
引用
收藏
页码：14493 / 14508
页数：16
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