Effect of Surface Modification on Impact Strength and Flexural Strength of Poly(lactic acid)/Silicon Carbide Nanocomposites

2018 ◽  
Vol 26 (3) ◽  
pp. 211-214 ◽  
Author(s):  
Fan-Long Jin ◽  
Heng Zhang ◽  
Shan-Shan Yao ◽  
Soo-Jin Park
Keyword(s):  
Silicon Carbide ◽  
Surface Modification ◽  
Lactic Acid ◽  
Impact Strength ◽  
Flexural Strength ◽  
Poly Lactic Acid ◽  
Effect Of Surface

Characteristics of poly(lactic acid) reinforced composites with waste cotton

2011 ◽  
Vol 31 (6-7) ◽  
Author(s):  
Xiuju Zhang ◽  
Juncai Shen ◽  
Tingting Yang ◽  
Bihua Ye ◽  
Zhidan Lin ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Impact Strength ◽  
Flexural Strength ◽  
Polylactic Acid ◽  
Resource Utilization ◽  
Cotton Cloth ◽  
Poly Lactic Acid ◽  
Reinforced Composites ◽  
Crystallization Properties

Abstract In this study, waste cotton cloth (RC) was bonded with soluble starches as an adhesive, then dried, cut into particles and filled into polylactic acid (PLA) to achieve resource efficiency. The mechanical, thermal and crystallization properties of the composites were characterized. The results indicated that with the addition of RC, the tensile strength, impact strength and flexural strength of PLA composites improved. Also, the heat distortion temperatures increased slowly, indicating that RC filled into PLA can be turned back into useful items without the degradation of PLA composites. This is a good way to give direction to the resource utilization of waste clothing. The addition of RC could significantly reduce the spherulitic size of PLA.

Evaluation on Effect of Surface Modification on the Adhesion Between Wood and Poly(Lactic Acid)

2012 ◽  
Vol 6 (4) ◽  
pp. 388-398 ◽  
Author(s):  
Eustathios Petinakis ◽  
Long Yu ◽  
George P. Simon ◽  
Graham H. Edward ◽  
Katherine Dean
Keyword(s):  
Surface Modification ◽  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Effect Of Surface

Effect of low nanoclay content on the physico-mechanical properties of poly(lactic acid) nanocomposites

2018 ◽  
Vol 27 (2) ◽  
pp. 43-54 ◽  
Author(s):  
JR Robledo-Ortíz ◽  
AS Martín del Campo ◽  
EJ López-Naranjo ◽  
M Arellano ◽  
CF Jasso-Gastinel ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Impact Strength ◽  
Flexural Strength ◽  
Mechanical Performance ◽  
Flexural Modulus ◽  
Poly Lactic Acid ◽  
Scanning Calorimetry ◽  
Degradation Temperature ◽  
Nanoclay Content ◽  
The Impact

In this work, three different nanoclays (1.44P, 1.34MN, and Cloisite 15A) were used to reinforce an injection grade poly(lactic acid) (PLA). The nanocomposites (NCs) were prepared using three different nanoclay concentration levels (1, 3, and 5 wt%) in a twin-screw extruder. To evaluate their mechanical performance (static and dynamic tests) and thermal properties, the respective samples were obtained by injection molding. Results showed that the three nanoclays significantly increased the tensile and flexural modulus of the injection grade PLA. The 1.34MN NCs also showed improvement in the tensile strength. An increment in flexural strength was obtained with 1.34MN and 1.44P nanoclays, while with nanoclay 15A, the flexural strength decreased. Additionally, the use of 5 wt% of 1.44P nanoclay allowed an increase in impact strength while using 1.34MN and 15A nanoclays, the impact strength was similar to the one observed for pure PLA. In general, mechanodynamic analysis results showed that storage modulus increased with nanoclay content; while thermogravimetric analysis indicated that none of the nanoclays has a significant effect over the degradation temperature of pure PLA. Differential scanning calorimetry results showed that the crystallinity of PLA is enhanced with nanoclay inclusion. For 1.34MN NCs, X-ray diffraction observations exposed that the mineral clay relative intensity peaks disappeared indicating nanoclay exfoliation, which contributes to the increase in tensile and flexural strength in the NCs. Nevertheless for 1.44P and 15A nanoclays, an increase in the interlayer distance (intercalation) was detected.

scholarly journals Mechanical Properties and Bioactivity of Poly(Lactic Acid) Composites Containing Poly(Glycolic Acid) Fiber and Hydroxyapatite Particles

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 249
Author(s):  
Han-Seung Ko ◽  
Sangwoon Lee ◽  
Doyoung Lee ◽  
Jae Young Jho
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Flexural Strength ◽  
Interfacial Adhesion ◽  
Glycolic Acid ◽  
Compact Bone ◽  
Poly Lactic Acid ◽  
Coupling Reactions ◽  
The Poor ◽  
Human Compact Bone

To enhance the mechanical strength and bioactivity of poly(lactic acid) (PLA) to the level that can be used as a material for spinal implants, poly(glycolic acid) (PGA) fibers and hydroxyapatite (HA) were introduced as fillers to PLA composites. To improve the poor interface between HA and PLA, HA was grafted by PLA to form HA-g-PLA through coupling reactions, and mixed with PLA. The size of the HA particles in the PLA matrix was observed to be reduced from several micrometers to sub-micrometer by grafting PLA onto HA. The tensile and flexural strength of PLA/HA-g-PLA composites were increased compared with those of PLA/HA, apparently due to the better dispersion of HA and stronger interfacial adhesion between the HA and PLA matrix. We also examined the effects of the length and frequency of grafted PLA chains on the tensile strength of the composites. By the addition of unidirectionally aligned PGA fibers, the flexural strength of the composites was greatly improved to a level comparable with human compact bone. In the bioactivity tests, the growth of apatite on the surface was fastest and most uniform in the PLA/PGA fiber/HA-g-PLA composite.

The effect of surface modifications on sisal fiber properties and sisal/poly (lactic acid) interface adhesion

2015 ◽  
Vol 73 ◽  
pp. 132-138 ◽  
Author(s):  
A. Orue ◽  
A. Jauregi ◽  
C. Peña-Rodriguez ◽  
J. Labidi ◽  
A. Eceiza ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Surface Modifications ◽  
Sisal Fiber ◽  
Poly Lactic Acid ◽  
Interface Adhesion ◽  
Fiber Properties ◽  
Effect Of Surface
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