scholarly journals Engineering Porous Poly(lactic acid) Scaffolds with High Mechanical Performance via a Solid State Extrusion/Porogen Leaching Approach

Polymers ◽  
2016 ◽  
Vol 8 (6) ◽  
pp. 213 ◽  
Author(s):  
Hua-Mo Yin ◽  
Jing Qian ◽  
Jin Zhang ◽  
Zai-Fu Lin ◽  
Jian-Shu Li ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Solid State ◽  
Mechanical Performance ◽  
Poly Lactic Acid ◽  
Porous Poly

Effect of Polyethylene Glycol in Nanocellulose/PLA Composites

2019 ◽  
Vol 821 ◽  
pp. 89-95
Author(s):  
Wanasorn Somphol ◽  
Thipjak Na Lampang ◽  
Paweena Prapainainar ◽  
Pongdhorn Sae-Oui ◽  
Surapich Loykulnant ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Polyethylene Glycol ◽  
Aspect Ratio ◽  
Mechanical Performance ◽  
Tensile Modulus ◽  
Poly Lactic Acid ◽  
Solvent Casting ◽  
Casting Method ◽  
Mediated Oxidation

Poly (lactic acid) or PLA was reinforced by nanocellulose and polyethylene glycol (PEG), which were introduced into PLA matrix from 0 to 3 wt.% to enhance compatibility and strength of the PLA. The nanocellulose was prepared by TEMPO-mediated oxidation from microcrystalline cellulose (MCC) powder and characterized by TEM, AFM, and XRD to reveal rod-like shaped nanocellulose with nanosized dimensions, high aspect ratio and high crystallinity. Films of nanocellulose/PEG/PLA nanocomposites were prepared by solvent casting method to evaluate the mechanical performance. It was found that the addition of PEG in nanocellulose-containing PLA films resulted in an increase in tensile modulus with only 1 wt% of PEG, where higher PEG concentrations negatively impacted the tensile strength. Furthermore, the tensile strength and modulus of nanocellulose/PEG/PLA nanocomposites were higher than the PLA/PEG composites due to the existence of nanocellulose chains. Visual traces of crazing were detailed to describe the deformation mechanism.

Preparation of highly interconnected porous poly(ε-caprolactone)/poly(lactic acid) scaffolds via supercritical foaming

2018 ◽  
Vol 29 (12) ◽  
pp. 3065-3074 ◽  
Author(s):  
Shuhao Sun ◽  
Qian Li ◽  
Na Zhao ◽  
Jing Jiang ◽  
Kangkang Zhang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Supercritical Foaming ◽  
Porous Poly

scholarly journals Hybrid Biocomposites Based on Poly(Lactic Acid) and Silica Aerogel for Food Packaging Applications

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4910 ◽  
Author(s):  
Alejandro Aragón-Gutierrez ◽  
Marina P. Arrieta ◽  
Mar López-González ◽  
Marta Fernández-García ◽  
Daniel López
Keyword(s):  
Thermal Stability ◽  
Lactic Acid ◽  
Silica Aerogel ◽  
Food Packaging ◽  
Mechanical Performance ◽  
Composite Films ◽  
Barrier Properties ◽  
Extrusion Process ◽  
Poly Lactic Acid ◽  
Barrier Performance

Bionanocomposites based on poly (lactic acid) (PLA) and silica aerogel (SiA) were developed by means of melt extrusion process. PLA-SiA composite films were plasticized with 15 wt.% of acetyl (tributyl citrate) (ATBC) to facilitate the PLA processability as well as to attain flexible polymeric formulations for films for food packaging purposes. Meanwhile, SiA was added in four different proportions (0.5, 1, 3 and 5 wt.%) to evaluate the ability of SiA to improve the thermal, mechanical, and barrier performance of the bionanocomposites. The mechanical performance, thermal stability as well as the barrier properties against different gases (carbon dioxide, nitrogen, and oxygen) of the bionanocomposites were evaluated. It was observed that the addition of 3 wt.% of SiA to the plasticized PLA-ATBC matrix showed simultaneously an improvement on the thermal stability as well as the mechanical and barrier performance of films. Finally, PLA-SiA film formulations were disintegrated in compost at the lab-scale level. The combination of ATBC and SiA sped up the disintegration of PLA matrix. Thus, the bionanocomposites produced here show great potential as sustainable polymeric formulations with interest in the food packaging sector.

High piezoelectric performance of poly(lactic acid) film manufactured by solid-state extrusion

2014 ◽  
Vol 53 (9S) ◽  
pp. 09PC02 ◽  
Author(s):  
Mitsunobu Yoshida ◽  
Takayuki Onogi ◽  
Katsuki Onishi ◽  
Takuma Inagaki ◽  
Yoshiro Tajitsu
Keyword(s):  
Lactic Acid ◽  
Solid State ◽  
Poly Lactic Acid ◽  
Piezoelectric Performance

In vitro degradation of porous poly(lactic acid)/quantum dots scaffolds

2013 ◽  
Vol 55 ◽  
pp. 234-239 ◽  
Author(s):  
Xinghou Gong ◽  
Chak Yin Tang ◽  
Ling Pan ◽  
Zhonghua Hao ◽  
Chi Pong Tsui ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lactic Acid ◽  
Poly Lactic Acid ◽  
In Vitro Degradation ◽  
Porous Poly
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