Enhancing gas barrier performance of polylactic acid/lignin composite films through cooperative effect of compatibilization and nucleation

2020 ◽  
pp. 50199
Author(s):  
Ningning Wang ◽  
Caili Zhang ◽  
Yunxuan Weng
Keyword(s):  
Polylactic Acid ◽  
Composite Films ◽  
Cooperative Effect ◽  
Gas Barrier ◽  
Barrier Performance

scholarly journals Antimicrobial Active Bioplastics Using Triangular Silver Nanoplate Integrated Polycaprolactone and Polylactic Acid Films

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1132
Author(s):  
Eduardo Lanzagorta Garcia ◽  
Olivia A. Attallah ◽  
Marija Mojicevic ◽  
Declan M Devine ◽  
Margaret Brennan Fournet
Keyword(s):  
Polylactic Acid ◽  
Scale Up ◽  
Composite Films ◽  
Antimicrobial Properties ◽  
Morphological Structure ◽  
Antimicrobial Effect ◽  
Solvent Casting ◽  
Local Surface Plasmon Resonance ◽  
Casting Technique ◽  
Triangular Silver Nanoplates

An innovative antimicrobial technology for plastic surfaces is presented. We report the synthesis and scale-up of triangular silver nanoplates (TSNPs) and their integration into polycaprolactone (PCL) and polylactic acid (PLA) polymers through a solvent-casting technique. The TSNPs have a high geometric aspect ratio and strong local surface plasmon resonance (LSPR) response, which provides an effective tool for monitoring their integrity during processing and integration with the biodegradable plastics. An aqueous-based seed-mediated chemical method was used to synthesize the TSNPs, and characterisation was carried out using TEM and UV (Ultraviolet)-VIS (Visible) spectroscopy to measure LSPR profiles. The UV-VIS spectra of silver seeds and TSNPs exhibited characteristic peaks at 395 and 600 nm respectively. Synthesized TSNPs were coated with thiol-terminated polyethylene glycol (SH-PEG) and transferred into chloroform in order to effect compatibility with PCL and PLA. TSNP/PCL and TSNP/PLA composite films were prepared by solvent casting. The morphological structure, thermal, mechanical, and antimicrobial properties of the TSNP-incorporated composite films were evaluated. Results showed the TSNP-treated films had a rougher surface than the bare films. Insignificant changes in the thermal properties of TSNP-treated films compared to bare ones were also observed, which indicated the thermal stability of the composite films. The tensile strength and antimicrobial properties of the composite films were increased after TSNP incorporation. TSNP/PCL and TSNP/PLA films exhibited improved antimicrobial activity against Escherichia coli and Staphylococcus aureus with antimicrobial effect (AE) values ranging between 0.10 and 0.35. The obtained results and demonstrated TSNP production scalability validate the TSNP treated PCL and PLA films as a composite material with desirable antimicrobial effect for wide-ranging surface applications.

Biaxially oriented poly(propylene-g-maleic anhydride)/phosphate glass composite films for high gas barrier applications

Polymer ◽  
2009 ◽  
Vol 50 (2) ◽  
pp. 598-604 ◽  
Author(s):  
Mohit Gupta ◽  
Yijian Lin ◽  
Taneisha Deans ◽  
Alexis Crosby ◽  
Eric Baer ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Phosphate Glass ◽  
Composite Films ◽  
Glass Composite ◽  
Gas Barrier ◽  
Poly Propylene

scholarly journals Effect of silane functionalized graphene prepared by a supercritical carbon dioxide process on the barrier properties of polyethylene terephthalate composite films

RSC Advances ◽  
2019 ◽  
Vol 9 (38) ◽  
pp. 21903-21910 ◽  
Author(s):  
Jiajia Wei ◽  
Shigui Peng ◽  
Bin Xue ◽  
Zhao Yang ◽  
Shuhao Qin ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Polyethylene Terephthalate ◽  
Composite Films ◽  
Barrier Properties ◽  
Coupling Agents ◽  
Functionalized Graphene ◽  
Silane Coupling Agents ◽  
Silane Coupling ◽  
Barrier Performance

Adding silane modified GNs prepared by a Sc-CO2 process into a PET matrix could greatly enhance the barrier properties of the GNs/PET composites.The barrier performance of GNs/PET composites was greatly enhanced by modifying GNs with silane coupling agents via Sc-CO2 process.

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.

Antimicrobial Activity of Allyl Isothiocyanate Used To Coat Biodegradable Composite Films as Affected by Storage and Handling Conditions†

2012 ◽  
Vol 75 (12) ◽  
pp. 2234-2237 ◽  
Author(s):  
WEILI LI ◽  
LINSHU LIU ◽  
TONY Z. JIN
Keyword(s):  
Antimicrobial Activity ◽  
Polylactic Acid ◽  
Food Packaging ◽  
Storage Time ◽  
Storage Temperature ◽  
Composite Films ◽  
Antimicrobial Properties ◽  
Allyl Isothiocyanate ◽  
Microbial Reduction ◽  
Biodegradable Composite

We evaluated the effects of storage and handling conditions on the antimicrobial activity of biodegradable composite films (polylactic acid and sugar beet pulp) coated with allyl isothiocyanate (AIT). Polylactic acid and chitosan were incorporated with AIT and used to coat one side of the film. The films were subjected to different storage conditions (storage time, storage temperature, and packed or unpacked) and handling conditions (washing, abrasion, and air blowing), and the antimicrobial activity of the films against Salmonella Stanley in tryptic soy broth was determined. The films (8.16 μl of AIT per cm2 of surface area) significantly (P < 0.05) inhibited the growth of Salmonella during 24 h of incubation at 22°C, while the populations of Salmonella in controls increased from ca. 4 to over 8 log CFU/ml, indicating a minimum inactivation of 4 log CFU/ml on films in comparison to the growth on controls. Statistical analyses indicated that storage time, storage temperature, and surface abrasion affected the antimicrobial activity of the films significantly (P < 0.05). However, the differences in microbial reduction between those conditions were less than 0.5 log cycle. The results suggest that the films' antimicrobial properties are stable under practical storage and handling conditions and that these antimicrobial films have potential applications in food packaging.

scholarly journals Polylactic Acid (PLA) Composite Films Reinforced with Wet Milled Jute Nanofibers

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Vijay Baheti ◽  
Jiri Militky ◽  
S. Z. Ul Hassan
Keyword(s):  
Polylactic Acid ◽  
Composite Films ◽  
Barrier Properties ◽  
High Energy ◽  
Fiber Bundles ◽  
Wet Milling ◽  
Jute Fibers ◽  
Planetary Ball Milling ◽  
Maximum Improvement ◽  
Textile Industries

In the present study, waste jute fibers formed in textile industries were wet pulverized to nanoscale using high energy planetary ball milling. The rate of refinement of uncleaned jute fibers having noncellulosic contents was found slower than the cleaned jute fibers. This behavior is attributed to the strong holding of fiber bundles by noncellulosic contents which offered resistance to the defibrillation during wet milling. In addition, the pulverization of fibers in the presence of water prevents the increase in temperature of mill which subsequently avoided the sticking of material on the milling container. After three hours milling, the diameter of nanofibers was observed around 50 nm. In the further stage, obtained nanofibers were incorporated under 1 wt%, 5 wt%, and 10 wt% loading into polylactic acid composite films. The potentials of jute nanofibers were investigated for improvement in mechanical and barrier properties of films. The maximum improvement in mechanical properties was observed in case of 5 wt% composite film where Young’s modulus was increased to 3.3 GPa from 1.0 GPa as compared with neat PLA film.

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