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Ho, Kai-Lai G.; Pometto, Anthony L.; Gadea-Rivas, Arnoldo; Briceño, Jorge A.; Rojas, Adrián

doi:10.1023/a:1022874530586

Cited by 84 publications

(26 citation statements)

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“…These short degradation times of PLA films are probably due to high temperature and to the low thickness of the tested samples. The rate of hydrolytic degradation of PLA is, in fact, strongly dependent on temperature and the humidity level 5, 34. Further investigations, in accordance with other standards, allowed the study of disintegrability trend of the PLA and PLA composite films at lower incubation temperature.…”

Section: Resultsmentioning

confidence: 75%

“…It was reported that PLA degradation occurred in 2 weeks and was marked by the embrittlement of the samples 10. During the initial phases of the disintegration, the high‐molecular weight PLA chains are hydrolyzed to form lower molecular weight chains and this reaction can be accelerated by the presence of acids or bases 34. In this case, Ag ion release, could acted as catalytic agents accelerating the disintegration process.…”

Section: Resultsmentioning

confidence: 99%

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New multifunctional poly(lactide acid) composites: Mechanical, antibacterial, and degradation properties

Fortunati

Armentano

Iannoni

et al. 2011

J of Applied Polymer Sci

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The aim of this work was to study the effect of the innovative combination of microcrystalline cellulose (MCC) and silver nanoparticles (Ag) on the poly (lactide acid) (PLA) composite properties, to modulate the PLA mechanical response and induce an antibacterial effect. The preparation and characterization of PLA-based composites with MCC and Ag nanoparticles by twin-screw extrusion followed by injection molding is reported. A film procedure was also performed to obtain PLA and PLA composite films with a thickness ranged between 20 and 60 lm. The analysis of disintegrability in composting conditions by means of visual, morphological, thermal, and chemical investigations was done to gain insights into the post-use degradation processes. Tensile test demonstrated the MCC reinforcing effect, while a bactericidal activity of silver-based composites against a Gram-negative bacteria (Escherichia coli) and a Gram-positive bacteria (Staphylococcus aureus) was detected at any time points and temperatures analyzed. Moreover, the disintegrability in composting showed that MCC is able to promote the degradation process. The combination of MCC and Ag nanoparticles in PLA polymer matrix offers promising perspectives to realize multifunctional ternary composites with good mechanical response and antibacterial effect, maintaining the optical transparency and the disintegrability, hence suitable for packaging applications. V C 2011 Wiley Periodicals, Inc. J Appl Polym Sci 124: [87][88][89][90][91][92][93][94][95][96][97][98] 2012

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

New multifunctional poly(lactide acid) composites: Mechanical, antibacterial, and degradation properties

Fortunati

Armentano

Iannoni

et al. 2011

J of Applied Polymer Sci

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“…Although, PLA biopolymer decomposed via hydrolytic degradation into smaller polymer molecules/fragments, and finally lactic acid, which could later be consumed by microorganisms as nutrients into carbon dioxide, water, and biomass, the degradation process was temperature and humidity dependent . High molecular weight PLA plastic films were reported to have good storability at 28 °C, 40 °C, and 55 °C at 50% RH …”

Section: Resultsmentioning

confidence: 99%

Effect of storage temperature and time on stability of poly(lactide)–whey protein isolate laminated films

Phupoksakul

Leuangsukrerk

Somwangthanaroj

et al. 2016

J of Applied Polymer Sci

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The stability of biopolymeric multilayer film fabricated from poly(lactide) (PLA) and glycerol‐plasticized whey protein isolate (WPI), PLA/WPI/PLA, at 4 °C, 25 °C, and 35 °C were examined. The PLA/WPI/PLA film showed small rates of decreasing in transparency and increasing total color difference. Storage at 35 °C caused the film to become stronger and less extendible. The multilayer structures showed lower tensile strength and higher elongation over storage at 4 °C and 25 °C. Oxygen and water vapor barrier abilities of PLA/WPI/PLA gradually improved over time, especially at 35 °C. The changes in properties of laminate structure can be empirically fitted with either zero‐ or first‐order reaction kinetics, with overall R2 ≥ 0.90. The results suggested that PLA/WPI/PLA film could be stored at 4–35 °C, 50–59% RH, for extended period of inventory time. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43547.

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“…This reaction can be accelerated by acids or bases and it is also affected by both temperature and moisture [24]. During this step, some microorganisms in the compost are able to catalyze the degradation, probably by hydrolytic scission of ester groups into an acid and an alcohol, finally converting the lower molecular chains to CO 2 , water, and humus.…”

Section: Soil Burial Testmentioning

confidence: 99%

Thermal and biodegradation properties of poly(lactic acid)/fertilizer/oil palm fibers blends biocomposites

et al. 2014

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Poly(lactic acid) (PLA) and NPK fertilizer with empty fruit bunch (EFB) fibers were blends to produced bioplastic fertlizer (BpF) composites for slow release fertilizer. Thermal properties of BpF composites were investigated by thermogavimteric analysis (TGA), differential scanning calorimetry (DSC), and morphological and degradation properties were anlayzed by scanning electron microscopy (SEM), soil burial test, respectively. TGA themogram display that neat PLA, PLA/NPK, and BpF composites degradate at different temperatures. DSC curves of PLA and other composites exhibited same glass transition temperature (Tg) value indicating that both major blend components are miscible. The Tg, crystallization temperature (Tc), melting temperature (Tm) values also decreased with increased amount of fertilizer and fibers. The Tm of BpF composites did not change with an increase in fertilizer content because thermal stability of PLA and PLA/NPK composites was not affected. Soil burial and fungal degradation test of PLA, PLA/NPK, and BpF composites were also carried out. Soil burial studies indicated that BpF composites display better biodegradation as compared with neat NPK. Fungal degradation study indicated that fungi exposure times of BpF composites show higher value of degradation as compared with PLA/NPK. We attribute that developed BpF composites will help oil palm plantation industry to use it as slow release fertilizer. POLYM. COMPOS. 36:576–583, 2015. © 2014 Society of Plastics Engineers

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Untitled

Cited by 84 publications

References 1 publication

New multifunctional poly(lactide acid) composites: Mechanical, antibacterial, and degradation properties

New multifunctional poly(lactide acid) composites: Mechanical, antibacterial, and degradation properties

Effect of storage temperature and time on stability of poly(lactide)–whey protein isolate laminated films

Thermal and biodegradation properties of poly(lactic acid)/fertilizer/oil palm fibers blends biocomposites

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