Assessing the Effect of Cellulose Nanocrystal Content on the Biodegradation Kinetics of Multiscale Polylactic Acid Composites under Controlled Thermophilic Composting Conditions

Colli-Gongora, Priscila Esther; Moo-Tun, Nora Magally; Herrera-Franco, Pedro Jesús; Valadez-Gonzalez, Alex

doi:10.3390/polym15143093

Cited by 5 publications

(2 citation statements)

References 55 publications

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“…After the titration, a fresh 1M NaOH solution was added to the vessels. The total CO 2 evolved during the test was calculated in reference to the control vessel [34]. The experimental results for each sample are the average values obtained from three samples.…”

Section: Compost Degradationmentioning

confidence: 99%

Reed Fiber as a Sustainable Filler for Tuning the Biodegradability of Polylactic acid Composites

Xu,

Li,

et al. 2024

Preprint

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Reed fiber/polylactic acid (PLA/RF) blends with various proportions were prepared through melt blending, and the corresponding films were prepared by blow molding. The biodegradability of PLA/RF films with varying RF contents was investigated in the presence of proteinase K. The crystallization behavior, surface morphology, and functional group changes of the samples during enzymatic degradation were analyzed using differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and Fourier transform infrared spectrometer (FTIR). Meanwhile, we investigated the influence of reed fiber on the biodegradation behavior of test samples in different environments. The results showed that RF could enhance the degradation of PLA. Additionally, the inclusion of reed fiber significantly improved the hydrophilicity of the composites and reduced the crystallinity of PLA, thereby impacting the degradation rate of the composites. The weight loss rates of PLA/RF10, PLA/RF20, and PLA/RF30 were 12.01%, 14.17%, and 19.92% after 12 months under soil burial degradation conditions. The results of composting degradation also confirmed that reed fiber contributed to the disintegration behavior and biodegradation rate of the materials. The modification of RF and PLA blends to regulate the degradation rate of composites holds great promise for practical application.

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Section: Compost Degradationmentioning

confidence: 99%

Reed Fiber as a Sustainable Filler for Tuning the Biodegradability of Polylactic acid Composites

Xu,

Li,

et al. 2024

Preprint

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show abstract

“…The experimental results of each sample are the average values obtained from three samples. The rate of biodegradation (D t ) was evaluated by using Equation (3) [32]:…”

Section: Composting Degradation Testsmentioning

confidence: 99%

Enhanced Biodegradation Rate of Poly(butylene adipate-co-terephthalate) Composites Using Reed Fiber

Xu,

Feng,

et al. 2024

Polymers

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To enhance the degradability of poly(butylene adipate-co-terephthalate) (PBAT), reed fiber (RF) was blended with PBAT to create composite materials. In this study, a fifteen day degradation experiment was conducted using four different enzyme solutions containing lipase, cellulase, Proteinase K, and esterase, respectively. The degradation process of the sample films was analyzed using an analytical balance, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). The PBAT/RF composites exhibited an increased surface hydrophilicity, which enhanced their degradation capacity. Among all the enzymes tested, lipase had the most significant impact on the degradation rate. The weight loss of PBAT and PBAT/RF, caused by lipase, was approximately 5.63% and 8.17%, respectively. DSC analysis revealed an increase in the melting temperature and crystallinity over time, especially in the film containing reed fibers. FTIR results indicated a significant weakening of the ester bond peak in the samples. Moreover, this article describes a biodegradation study conducted for three months under controlled composting conditions of PBAT and PBAT/RF samples. The results showed that PBAT/RF degraded more easily in compost as compared to PBAT. The lag phase of PBAT/RF was observed to decrease by 23.8%, while the biodegradation rate exhibited an increase of 11.8% over a period of 91 days. SEM analysis demonstrated the formation of more cracks and pores on the surface of PBAT/RF composites during the degradation process. This leads to an increased contact area between the composites and microorganisms, thereby accelerating the degradation of PBAT/RF. This research is significant for preparing highly degradable PBAT composites and improving the application prospects of biodegradable green materials. PBAT/RF composites are devoted to replacing petroleum-based polymer materials with sustainable, natural materials in advanced applications such as constructional design, biomedical application, and eco-environmental packaging.

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Reed fiber as a sustainable filler for tuning the biodegradability of polylactic acid composites

Xu,

Li,

et al. 2024

Journal of Polymer Engineering

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With the global attention on plastic pollution, polylactic acid (PLA) is quickly becoming an alternative to traditional plastics. The current pressing challenge now is to enhance the degradation rate of PLA while simultaneously reducing costs. We investigated the influence of reed fibers on the biodegradation of PLA-based composites under various environmental conditions. The crystallization behavior, surface morphology, and functional group changes of the samples during enzymatic degradation were analyzed using differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and Fourier transform infrared spectrometer (FTIR). The results indicate that reed fibers significantly increased the hydrophilicity of the composites and reduced the crystallinity of PLA, thereby enhancing the degradation rate of the composites. This rate increased with the higher concentration of reed fibers. The research results will provide a theoretical reference for the design of PLA composites that are better aligned with market demand, which is used to balance the requirements for degradation performance during product use and after disposal and expand the application of PLA/RF composites in the construction, agriculture, and packaging.

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Assessing the Effect of Cellulose Nanocrystal Content on the Biodegradation Kinetics of Multiscale Polylactic Acid Composites under Controlled Thermophilic Composting Conditions

Cited by 5 publications

References 55 publications

Reed Fiber as a Sustainable Filler for Tuning the Biodegradability of Polylactic acid Composites

Reed Fiber as a Sustainable Filler for Tuning the Biodegradability of Polylactic acid Composites

Enhanced Biodegradation Rate of Poly(butylene adipate-co-terephthalate) Composites Using Reed Fiber

Reed fiber as a sustainable filler for tuning the biodegradability of polylactic acid composites

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