Mechanical properties of PLA/PBS foamed composites reinforced by organophilic montmorillonite

Zhou, Jian; Yao, Zhengjun; Zhou, Chang; Wei, Dongbo; Li, Shuqin

doi:10.1002/app.40773

Cited by 58 publications

(37 citation statements)

References 26 publications

(39 reference statements)

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“…For the PCL/PLA (7/3) blends, as the foaming pressure increased, although the cell size decreased, the cell density increased, which is beneficial to the increase of tensile strength of microcellular foamed materials, but due to the low melting point of PCL, more gas was incorporated into the polymer matrix, so the expansion ratio was large, resulting in a relatively low relative density of the samples, which was disadvantageous to the microcellular foamed materials resisting the applied external force; therefore, the tensile strength and the elastic modulus tended to decrease as the foaming pressure increases. As the foaming pressure increased, the cell size decreased and the cell density increase; therefore, the elongation at break tended to decrease …”

Section: Resultsmentioning

confidence: 99%

Fabrication of open‐porous PCL/PLA tissue engineering scaffolds and the relationship of foaming process, morphology, and mechanical behavior

Wang

Zhou

et al. 2019

Polymers for Advanced Techs

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Tissue engineering scaffolds should provide a suitable porous structure and proper mechanical strength, which is beneficial for the delivery of growth factor and regulation of cells. In this study, the open‐porous polycaprolactone (PCL)/poly (lactic acid) (PLA) tissue engineering scaffolds with suitable porous scale were fabricated using different ratios of PCL/PLA blends. At the same time, the relationship of foaming process, morphology, and mechanical behavior in the optimized batch microcellular foaming process were studied based on the single‐factor experiment method. The porous structures and mechanical strength of the scaffolds were optimized by adjusting foaming parameters, including the temperature, pressure, and CO2 dissolution time. The results indicated that the foaming parameters influence the cell morphology, further determine the mechanical behavior of PCL/PLA blends. When the PCL content is high, with the increase of temperature and time, the cell diameter and the elastic modulus increased, and the tensile strength and elastic modulus increased with the increase of the average cell size, and decreased as the increase of the cell density. While when the PLA content was high, the cell diameter showed the same trend, and the tensile strength and elastic modulus were higher, and the elongation at break was lower, and tensile strength and elastic modulus decreased with the increase of the average cell size and increased with the increase of cell density. This work successfully fabricated optimized porous PCL/PLA scaffolds with excellent suitable mechanical properties, pore sizes, and high interconnectivity, indicating the effectiveness of modulating the batch foaming process parameters.

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Section: Resultsmentioning

confidence: 99%

Fabrication of open‐porous PCL/PLA tissue engineering scaffolds and the relationship of foaming process, morphology, and mechanical behavior

Wang

Zhou

et al. 2019

Polymers for Advanced Techs

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“…Therefore, besides the polymeric matrix, the filler used in the foamed composites is another critical factor for the structure and properties of the materials. Diverse inorganic and organic fillers have been reported in the preparation of the foamed composites, for instance calcium carbonate (Chen et al 2013), nanosilica (Gong et al 2012), carbon nanofiber , carbon nanotube (Lim et al 2011), clay (Wong et al 2013), montmorillonite (Zhou et al 2014), lignin (Xue et al 2014) and wood fibers (Faruk et al 2007). As a rigid biomass-based nanoparticle, CNC can be expected to be the promising nanofiller to enhance the performance and provide the possible nucleation effect for the foamed composites.…”

Section: Introductionmentioning

confidence: 98%

Mechanical reinforcement of cellulose nanocrystals on biodegradable microcellular foams with melt-compounding process

Lin

Chen

et al. 2015

Cellulose

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The polymeric foamed composites were developed from the biodegradable poly(butylene succinate) (PBS) reinforced by the biomass-based cellulose nanocrystals (CNC) via the melt-compounding treatment. As the highly-crystalline and rigid nanoparticles, the presence of CNC in the polyester matrix can simultaneously enhance the flexural strength and flexural modulus of the foamed composites. With the addition of 5 wt% CNC, the flexural strength and modulus of the PBS foamed composite increased by 50 and 62.9 % in comparison with those of the neat foamed material. Furthermore, the introduction of the CNC significantly affected the cells morphology, structure and stability during the foaming process, which facilitated the increase of the cell density and the homogeneous cell size and distribution of the foamed composites. With the addition of 5 wt% azodicarbonamide as the chemical blowing agent and 5 wt% CNC as the bionanofillers, the foamed composite showed the increased cell density of 7.1 9 10 5 cell/ cm 3 , which was 69.1 % higher than that of the neat foamed material. The mechanical enhancement of the foamed composites was attributed to the nanoreinforcement of the CNC served as the stress transferring phase, and meanwhile the promising improvement on the cells structure and stability for the foamed composites was ascribed to the effect of the CNC acted as the nucleation component.

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“…PLA is used in PA polymer blend nanocomposites like PA11 (108), or PA 12 (109), and with other polymers such as polycaprolactone (PCL) (110), poly(butylene succinate) (PBS) (111), poly(butyleneadipate-co-butyleneterephthalate) (112), polyadipamine (113), etc.…”

Section: Biodegradable Polymer Blend Nanocompositesmentioning

confidence: 99%

Polyblend Nanocomposites

Feldman¹

2015

Journal of Macromolecular Science, Part A

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Blending polymers is used to obtain products with improved and wider range of properties. A polymer blend or polyblend is a microscopically mixture of two or more polymers. This paper deals with polyblend nanocomposites where one of the components has at least one dimension of the order of nanometer. It covers different groups of nanocomposites depending on the type of the polymer used in such mixtures, mainly:thermoplastic -thermoplastic polymer blend nanocomposites, thermoplastic -thermoset polymer blend nanocomposites, thermoplastic -elastomer polymer blend nanocomposites, biodegradable polymer blend nanocomposites.

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Mechanical properties of PLA/PBS foamed composites reinforced by organophilic montmorillonite

Cited by 58 publications

References 26 publications

Fabrication of open‐porous PCL/PLA tissue engineering scaffolds and the relationship of foaming process, morphology, and mechanical behavior

Fabrication of open‐porous PCL/PLA tissue engineering scaffolds and the relationship of foaming process, morphology, and mechanical behavior

Mechanical reinforcement of cellulose nanocrystals on biodegradable microcellular foams with melt-compounding process

Polyblend Nanocomposites

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