Effects of the composition ratio on the properties of PCL/PLA blends: a kind of thermo-sensitive shape memory polymer composites

Wang, Yanmei; Wang, Yanen; Wei, Qinghua; Zhang, Juan; Lei, Mingju; Li, Mingyang; Li, Dinghao

doi:10.1007/s10965-021-02815-4

Cited by 23 publications

(21 citation statements)

References 38 publications

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“…34 The low melting point (around 60 C) makes PCL ideal to produce tunable stiffness and toughness of PLA/PCL composite to be used in drug delivery, soft robotics, medical materials and devices. 35,36 Studies include double-layer bionic robotic flower petals for drug release, 34 the controlled drug release, 37 treatment of cardiovascular diseases, 38 wound care, 39 and bone tissue engineering. 40 Therefore, there are existing relevant studies that address the weaknesses of polylactic acid (PLA), such as its poor toughness, by incorporating polycaprolactone (PCL) through melt blending.…”

Section: Introductionmentioning

confidence: 99%

Taguchi design and optimization of the PLA/PCL composite filament with plasticizer and compatibilizer additives for optimal 3D printing

Yao,

Zhu,

et al. 2023

Polymer Engineering & Sci

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Abstract3D printing (3DP) has brought endless possibilities to the manufacturing industry. Biodegradable high‐polymer materials such as polylactic acid (PLA) and polycaprolactone (PCL) have attracted widespread attention. However, to optimize printing performance, this study prepared six PLA/PCL composite materials with ratios of 4:6, 5:5, and 6:4, by adding Polyethylene Glycol 4000 (PEG 4000) as a plasticizer and nano silica as a reinforcing agent. Parameters that can affect printing quality, including formulation, printing temperature (150, 170, and 190°C), filling density (305, 40%, and 50%), and printing speed (20, 30, and 40 mm/s), were examined and optimized. The optimal factor level combination determined by Taguchi fractional factorial design were silica addition 0.6 g, PLA content 60 wt%, printing temperature 190°C, infill density 50%, and printing speed 20 mm/s. The obtained minimum error value was 0.338 mm. Analysis of variance revealed the statistical significance of PLA content and printing temperature. A general linear model was established for result prediction, showing a difference of 9.25% from the actual error values. SEM results indicated poor compatibility between PLA and PCL in the melt‐blended mixture, while the addition of SiO2 nanoparticles facilitated PCL and PLA crystallization. DSC analysis demonstrated that the incorporation of PLC and SiO2 led to an increase in crystallinity, with 5PLA/5PCL/SiO2 exhibiting the highest crystallinity at 51.4%. Tensile testing results showed that the addition of 50 wt% PCL to PLA significantly improved the fracture elongation of the PLA/PCL material with a 5:5 formulation, averaging about 4 times higher than that of pure PLA, while the tensile strength decreased by 1.5 times. This study not only expands the research on PLA/PCL blends but also provides process guidance for 3D printing of the materials.

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Section: Introductionmentioning

confidence: 99%

Taguchi design and optimization of the PLA/PCL composite filament with plasticizer and compatibilizer additives for optimal 3D printing

Yao,

Zhu,

et al. 2023

Polymer Engineering & Sci

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“…Pradeep et al [ 10 ] investigated the use of PLA/poly (butylene succinate-co-adipate) (PBSA) and observed an increment in the crystallinity of the composites. In a study of blend filaments of PCL/PLA, the authors showed the effect on tensile strength regarding the concentration of PCL [ 11 ]. In our study, the aim was to combine PLA with a biopolymer that should provide appropriate mechanical and morphological properties without losing its biodegradable behavior.…”

Section: Introductionmentioning

confidence: 99%

Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends

et al. 2023

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Blends based on polylactic acid (PLA), chitosan, and grape seed extract (GE) were prepared by extrusion and injection molding. The effect of chitosan (5% and 15% on PLA basis) and natural extract (1% on PLA basis) incorporated into the PLA host matrix was explored regarding the thermal and mechanical properties. GE showed antioxidant activity, as determined by the DPPH assay method. Chitosan and GE affect the degree of crystallinity up to 30% as the polysaccharide acts as a nucleating agent, while the extract reduces the mobility of PLA chains. The decomposition temperature was mainly affected by adding chitosan, with a reduction of up to 25 °C. The color of the blends was specially modified after the incorporation of both components, obtaining high values of b* and L* after the addition of chitosan, while GE switched to high values of a*. The elongation at break (EB) exhibited that the polysaccharide is mainly responsible for its reduction of around 50%. Slight differences were accessed in tensile strength and Young’s modulus, which were not statistically significant. Blends showed increased irregularities in their surface appearance, as observed by SEM analysis, corresponding to the partial miscibility of both polymers.

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“…Among them, PCL/PLA blends have excellent shape memory properties, but the driving temperature is still too high (>90°C). 1 The PCL/TPU blends have medium shape memory properties with driving temperature below 60°C, but the mechanical strength is relatively low. 2 Therefore, the fabrication of PLA and TPU composites is a solution.…”

Section: Introductionmentioning

confidence: 99%

“…Intelligent materials, especially shape memory polymer composites (SMPC), can recover the state from programmed conditions to the initial situation under a specific stimulus. According to the shape memory actuation method, SMPC can be categorized into thermal responsive, 1 light-actuated, 2 electrical-driving, 3 magnetized-stimulating, 4 PH-incentive 5 and water-triggered, 6 and so on. The thermal responsive SMPC is the most familiar due to the easy manipulation, such as constructing the warm environment via direct heating (warm water 7 ) or indirect heat transfer (Joule heat 8 and light irradiation warming 2 ).…”

Section: Introductionmentioning

confidence: 99%

“…Fused deposition molding (FDM) is a widely used 3D printing technology, which has the advantages of low equipment price, easy operation, and a wide range of material sources. 1,7,14 Such as polylactic acid (PLA) is the most common material and generally originates from renewable plant starch, cassava, etc. Besides, as a shape memory material, PLA has weak shape memory properties (Rr about 10%), high driving temperature (>100°C) and high brittleness.…”

Section: Introductionmentioning

confidence: 99%

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4D printing light-/thermo-responsive shape memory composites based on thermoplastic polyurethane/polylactic acid/polyaniline blends

Wang

Liu

et al. 2022

High Performance Polymers

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In this work, a series of polylactic acid/thermoplastic polyurethane/polyaniline (PLA/TPU/PANI) blends with different weight ratios were prepared by Fused deposition molding First, six groups of PLA/TPU (U9A1/U8A2/U7A3/U6A4/U5A5/U4A6) and three groups of PLA/TPU/PANI (821/823/825) with different ratios were fabricated by melt blending. Then, the effects of different filament forming and printing process parameters on print resolution and quality were investigated. Next, printed samples were characterized by Fourier transform infrared (FTIR), Thermogravimetric analysis (TGA), Scanning electron microscopy (SEM) and mechanical experiments. The results of FTIR and TGA showed no chemical reaction between different components, and uniform distribution of the material was observed in the SEM. The tensile and compressive curves of the samples showed an inverted U-shape. Finally, the shape-memory property was evaluated by differential scanning calorimetry. For PLA/TPU blends, U8A2 had the best shape memory capability ([Formula: see text] = 80.8% and [Formula: see text] = 100%). Based on the excellent shape memory performance of PLA/TPU, the addition of PANI can introduce a light-actuated mechanism to form a binary-driven shape memory material. The composite materials prepared in this work can be applied to tissue engineering scaffolds, medical devices, soft robots and so on.

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Effects of the composition ratio on the properties of PCL/PLA blends: a kind of thermo-sensitive shape memory polymer composites

Cited by 23 publications

References 38 publications

Taguchi design and optimization of the PLA/PCL composite filament with plasticizer and compatibilizer additives for optimal 3D printing

Taguchi design and optimization of the PLA/PCL composite filament with plasticizer and compatibilizer additives for optimal 3D printing

Influence of Chitosan and Grape Seed Extract on Thermal and Mechanical Properties of PLA Blends

4D printing light-/thermo-responsive shape memory composites based on thermoplastic polyurethane/polylactic acid/polyaniline blends

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