Effects of two types of clay on physical and mechanical properties of poly(lactic acid)/wood flour composites at various wood flour contents

2012 ◽  
Vol 127 (4) ◽  
pp. 2566-2573 ◽  
Author(s):  
Ru Liu ◽  
Jinzhen Cao ◽  
Shupin Luo ◽  
Xing Wang
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Wood Flour ◽  
Physical And Mechanical Properties ◽  
Poly Lactic Acid

scholarly journals Preparation of Organo-Montmorillonite Modified Poly(lactic acid) and Properties of Its Blends with Wood Flour

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 204 ◽  
Author(s):  
Ru Liu ◽  
Xiaoqian Yin ◽  
Anmin Huang ◽  
Chen Wang ◽  
Erni Ma
Keyword(s):  
Mechanical Properties ◽  
Cell Wall ◽  
Lactic Acid ◽  
Wood Flour ◽  
Physical And Mechanical Properties ◽  
Poly Lactic Acid

In this study, poly(lactic acid) (PLA)/wood flour (WF) composites were prepared by first blending PLA with organo-montmorillonite (OMMT) at different contents (0.5, 1, 1.5, and 2 wt %). The physical and mechanical properties of the virgin and OMMT modified PLA and its WF composites were tested. The results showed that: (1) at low OMMT content (<1 wt %), OMMT can uniformly disperse into the PLA matrix with highly exfoliated structures. When the content increased to 1.5 wt %, some aggregations occurred; (2) after a second extruding process, the aggregated OMMT redistributed into PLA and part of OMMT even penetrated into the WF cell wall. However, at the highest OMMT content (2 wt %), aggregates still existed; (3) the highly exfoliated OMMT was beneficial to the physical and mechanical properties of PLA and the WF composites. The optimal group of OMMT-modified PLA was found at an OMMT content of 0.5 wt %, while for the PLA/WF system, the best properties were achieved at an OMMT content of 1.5 wt %.

Mechanical properties of wood flour/poly (lactic acid) composites coupled with waterborne silane-polyacrylate copolymer emulsion

Holzforschung ◽  
2016 ◽  
Vol 70 (5) ◽  
pp. 439-447 ◽  
Author(s):  
Ru Liu ◽  
Shupin Luo ◽  
Jinzhen Cao ◽  
Yu Chen
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
High Performance ◽  
Coupling Effect ◽  
Wood Flour ◽  
Flexural Modulus ◽  
Coupling Agents ◽  
Poly Lactic Acid ◽  
Effective Coupling ◽  
Methacryloxypropyl Trimethoxysilane

Abstract Wood flour/polylactic acid (WF/PLA) composites were produced with a WF content of 50% based on three types of waterborne polyacrylate (PA) emulsions including a PA homopolymer emulsion and two types of silane-PA copolymer emulsions as coupling agents. Two silanes were in focus, namely, γ-methacryloxypropyl- trimethoxysilane (silane-1) and vinyltrimethoxysilane (silane-2). The emulsions and the modified WFs were characterized, and the effects were investigated in terms of emulsion type and their loading levels on the mechanical properties of WF/PLA composites. (1) Both types of silanes could be successfully copolymerized with PA to form stable emulsions. (2) With increasing PA loading, the mechanical properties (except for flexural modulus) of the composites increased at first before reaching the maximum values at 4% PA loading and then the properties worsened. However, these values were larger than those of pure composites, especially in cases when PA-silane emulsions were applied. (3) PA modified with silane-1 showed the best coupling effect among all the three PA emulsions. The results can be interpreted that PA emulsions are effective coupling agents for the preparation of high-performance WPCs.

Short Review: Potential Production of Acacia Wood and its Biocomposites

2018 ◽  
Vol 917 ◽  
pp. 37-41 ◽  
Author(s):  
Muhammad Khusairy bin Bakri ◽  
Elammaran Jayamani ◽  
Soon Kok Heng ◽  
Akshay Kakar
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Review Paper ◽  
Natural Fiber ◽  
Physical And Mechanical Properties ◽  
Short Review ◽  
Fiber Composites ◽  
Poly Lactic Acid ◽  
Hybrid Polymer ◽  
Potential Production

In this short review paper, the physical and mechanical properties of acacia wood, poly lactic acid (PLA) and polyhydroxyalkanoates (PHA) were analyzed. Existing factors that affect the mechanical properties of natural fiber composites were investigated and identified. By knowing these factors, a possibility and potentiality in implementing the natural acacia wood reinforced material with hybrid polymer were discussed. It was found that the acacia wood had the potential to re-condition soil and have the potential to become reinforced materials in hybrid polymer composites. In addition, using fully biodegradable polymer such as PLA and PHA made it sustainable and environmentally friendly.

Effect of surface treatment on the physical and mechanical properties of injection molded poly(lactic acid)‐coir fiber biocomposites

2018 ◽  
Vol 40 (6) ◽  
pp. 2132-2141 ◽  
Author(s):  
M.E. González‐López ◽  
A.A. Pérez‐Fonseca ◽  
R. Manríquez‐González ◽  
M. Arellano ◽  
D. Rodrigue ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Surface Treatment ◽  
Physical And Mechanical Properties ◽  
Poly Lactic Acid ◽  
Coir Fiber ◽  
Injection Molded ◽  
Effect Of Surface

scholarly journals Study of the Physical and Mechanical Properties of Thermoplastic Starch/Poly(Lactic Acid) Blends Modified with Acid Agents

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 578
Author(s):  
Carolina Caicedo ◽  
Heidy Lorena Calambás Pulgarin
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Organic Acids ◽  
Physical And Mechanical Properties ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid ◽  
Thermal Transitions ◽  
Surface Polarity ◽  
Acid Agent ◽  
Structural Affinity

In this work, we present a functionalization strategy of starch-poly(lactic acid) (PLA) blends with organic acids. Lactic and acetic acid were used as acid agents, and oleic acid was also included in the previous acids, with the aim of finding a synergy that thermodynamically benefits the products and provides hydrophobicity. The ratio of starch and sorbitol was 70:30, and the added acid agent replaced 6% of the plasticizer; meanwhile, the thermoplastic starch (TPS)–PLA blend proportion was 70:30 considering the modified TPS. The mixtures were obtained in a torque rheometer at 50 rpm for 10 min at 150 °C. The organic acids facilitated interactions between TPS and PLA. Although TPS and PLA are not miscible, PLA uniformly dispersed into the starch matrix. Furthermore, a reduction in the surface polarity was achieved, which enabled the wettability to reach values close to those of neat PLA (TPS–L-PLA increased by 55% compared to TPS–PLA). The rheological results showed a modulus similar to that of TPS. In general, there were transitions from elastic to viscous, in which the viscous phase predominated. The first and second-order thermal transitions did not show significant changes. The structural affinity of lactic acid with biopolymers (TPS–L-PLA) allowed a greater interaction and was corroborated with the mechanical properties, resulting in a greater resistance with respect to pure TPS and blended TPS–PLA (28.9%). These results are particularly relevant for the packaging industry.

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