CO2 assisted blending of poly(lactic acid) and poly(ε-caprolactone)

Murphy, Shona; Marsh, Joseph; Kelly, Catherine A.; Leeke, Gary A.; Jenkins, Michael J.

doi:10.1016/j.eurpolymj.2016.12.013

Cited by 11 publications

(8 citation statements)

References 30 publications

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“…Hence, during the last few years, many studies and considerations have been carried out on PLA blends. [ 162‐168 ] The aims are to enhance the toughness and decrease the brittleness of PLA as well as widening the application range of PLA. [ 27,166,169‐174 ] If two polymers are miscible, intermediate properties can be fabricated through combining the mechanical, thermal and physical properties.…”

Section: Polylactic Acid Bionanocompositesmentioning

confidence: 99%

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Tensile and morphological properties of nanocrystalline cellulose and nanofibrillated cellulose reinforcedPLAbionanocomposites: A review

Zaaba

Jaafar

Ismail

2020

Polymer Engineering & Sci

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In recent years, bionanocomposites have received growing attention in science and industry due to their renewability, biodegradability and superior mechanical properties. Nanocellulose is another promising material that use as a reinforcement filler for bionanocomposite materials due to its lightweight, high surface area, high mechanical strength, high aspect ratio and low density. Different nanocellulose loading, sources, surface modification/functionalization and properties of nanocellulose are important in the production of bionanocomposites. In general, nanocellulose reinforced PLA bionanocomposite offers enhancement in tensile strength and elastic modulus. However, only minimal nanocellulose loadings are required for optimal results due to the incompatibility between the hydrophilic nanocellulose and hydrophobic PLA. This paper reviews the sources of nanocellulose and the properties of nanocellulose with a focus on the tensile and morphological properties of PLA bionanocomposites. Applications of nanocellulose in various industries are discussed in this article. This review article provides some important information. First, this study reviewed the application of nanostructured cellulose in biodegradable polymers. There are two types of nanostructured cellulose: nanocrystalline cellulose (NCC) and nanofibrillated cellulose (NFC). Second, the status on articles published on nanocellulose and PLA/nanocellulose over the past 10 years is reported. Third, the authors of this paper implemented a holistic and critical review to provide a comprehensive understanding of the different properties between NCC and NFC, the application of nanocellulose in bionanocomposites, as well as the properties of PLA and PLA bionanocomposites. Moreover, the influence of NCC and NFC on the tensile and morphological properties of bionanocomposites is covered in this article.

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Section: Polylactic Acid Bionanocompositesmentioning

confidence: 99%

“…[ 27,166,169‐174 ] If two polymers are miscible, intermediate properties can be fabricated through combining the mechanical, thermal and physical properties. [ 167 ]…”

Section: Polylactic Acid Bionanocompositesmentioning

confidence: 99%

Tensile and morphological properties of nanocrystalline cellulose and nanofibrillated cellulose reinforcedPLAbionanocomposites: A review

Zaaba

Jaafar

Ismail

2020

Polymer Engineering & Sci

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“…Poly(lactic acid) films (2002D, NatureWorks LLC, Minnetonka, MN, USA) with a thickness of 25 µm were provided by Fraunhofer IVV (Freising, Germany). Material properties of 2002D were determined by other groups: Murphy et al [37] report a melting temperature T m of 154 • C and a glass transition temperature T g of 55 • C as well as a D-lactide content of 4% and a molecular weight M W of 194,000 g mol −1 . Ge et al [38] report values of T m of 168.2 • C, T g of 58.6 • C, a D-lactide content of 4%, a L-lactide content of 96% and a M W of 121,400 g mol −1 .…”

Section: Substrate Materialsmentioning

confidence: 99%

Efficiently Extracted Cellulose Nanocrystals and Starch Nanoparticles and Techno-Functional Properties of Films Made Thereof

et al. 2018

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Cellulose nanocrystals (CNC) and starch nanoparticles (SNP) have remarkable physical and mechanical characteristics. These properties particularly facilitate their application as high-performance components of bio-based packaging films as alternatives to fossil-based counterparts. This study demonstrates a time-efficient and resource-saving extraction process of CNC and SNP by sulfuric acid hydrolysis and neutralization. The yields of the hydrolyzed products were 41.4% (CNC) and 32.2% (SNP) after hydrolysis times of 3 h and 120 h, respectively. The nanoparticle dispersions were wet-coated onto poly(lactic acid) (PLA) and paper substrates and were incorporated into starch films. No purification or functionalization of the nanoparticles was performed prior to their application. Techno-functional properties such as the permeability of oxygen and water vapor were determined. The oxygen permeability of 5–9 cm3 (STP) 100 µm m−2 d−1 bar−1 at 50% relative humidity and 23 °C on PLA makes the coatings suitable as oxygen barriers. The method used for the extraction of CNC and SNP contributes to the economic production of these nanomaterials. Further improvements, e.g., lower ion concentration and narrower particle size distribution, to achieve reproducible techno-functional properties are tangible.

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“…The PLA 2002D was purchased from NatureWorks LLC (Blair, NE, USA), and has a melting temperature of 154 C, a glass transition temperature of 55 C and L/D unit ratio was 24:1. [33,37] PCL was acquired from Sigma-Aldrich (Saint Louis, MO, USA). The PCL melting temperature is of 60 C and the glass transition temperature (T g = À60 C).…”

Section: Methodsmentioning

confidence: 99%

Enhancement of chemical, physical, and surface properties of electrospun PCL/PLA blends by means of air plasma treatment

Can-Herrera

Oliva

Cervantes‐Uc

2022

Polymer Engineering & Sci

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Polycaprolactone (PCL) and poly(lactic acid) (PLA) are polymers with unique individual features, but their mixing can produce a new biodegradable material with well-balanced properties, although with a disadvantage that both are highly hydrophobic materials. To improve this drawback, electrospun PCL/PLA blends with various weight ratios were superficially modified by air plasma. The changes undergone by the nanofibers were characterized using spectroscopic and microscopic techniques; water contact angle (WCA) was also determined. We demonstrated that the electrospun PCL/PLA blends did not suffer morphological changes, although it was observed an increase in the roughness and the O/C ratio (by XPS analysis) and, decrease in WCA values, when the PCL content dominates in the blend after the treatment. The surface characteristics of the scaffolds PCL/PLA blends can be improved after modification with plasma and by tuning the content of its components.

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CO2 assisted blending of poly(lactic acid) and poly(ε-caprolactone)

Cited by 11 publications

References 30 publications

Tensile and morphological properties of nanocrystalline cellulose and nanofibrillated cellulose reinforcedPLAbionanocomposites: A review

Tensile and morphological properties of nanocrystalline cellulose and nanofibrillated cellulose reinforcedPLAbionanocomposites: A review

Efficiently Extracted Cellulose Nanocrystals and Starch Nanoparticles and Techno-Functional Properties of Films Made Thereof

Enhancement of chemical, physical, and surface properties of electrospun PCL/PLA blends by means of air plasma treatment

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