Crystallization of polylactide-based green composites filled with oil-rich waste fillers

Mysiukiewicz, Olga; Barczewski, Mateusz

doi:10.1007/s10965-020-02337-5

Cited by 31 publications

(27 citation statements)

References 61 publications

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“…The appearance of the peak around 67.1-69 °C indicates the typical glass transition temperature (T g ) which is responsible for the relaxation of the PLA amorphous domains [22]. Another characteristic temperature observed on the thermogram was the cold crystallization (T cc ) temperature in the range 102-103.2 °C.…”

Section: Dscmentioning

confidence: 99%

Mechanical, Thermal and Microstructural Characteristic of 3D Printed Polylactide Composites with Natural Fibers: Wood, Bamboo and Cork

et al. 2021

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In the study, polylactide-based (PLA) composites modified with natural particles (wood, bamboo, and cork) and with different levels of infilling (100%, 80%, and 60%) obtained by fused deposition modeling were tested. The effect of fiber type, infill level and crystallization rate on the mechanical properties were investigated by using tensile, flexural, and impact tests. The materials were subjected to mechanical tests carried out at 23 and 80 °C. Differential scanning calorimetry were employed to analyze crystallization behavior of composite. Furthermore, hydrothermal degradation was performed, and its effect on the properties was analyzed. The addition of natural fillers and different levels of infilling result in a similar level of reduction in the properties. However, the addition of natural fillers resulted in a slightly lower drop than the lowered infilling rate − 40% and 50% for tensile strength, respectively. Moreover, it was found that, composites made of PLA are more sensitive to high temperatures than to water. The decrease in Young's modulus of PLA at 80 °C was 90%, while after 28 days of hydrodegradation ~ 9%. The addition of fibers reduced this decrease at elevated temperatures. Importantly, in the case of a brittle material such as PLA, the impact strength has been improved by 50% for composites with cork particles and other lignocellulosic composites remained at the same level as for resin. Generally, the thermal treatment of composites increased the degree of crystallinity of the materials, as reflected in the higher results of mechanical tests.

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Section: Dscmentioning

confidence: 99%

Mechanical, Thermal and Microstructural Characteristic of 3D Printed Polylactide Composites with Natural Fibers: Wood, Bamboo and Cork

et al. 2021

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“…Polyurethanes (PUR) represent a wide class of polymeric materials [ 1 , 2 ]. In recent years, the market for polymeric materials has shown strong, sustained growth and provided an opportunity for the integration of new bio-based feedstock for improved sustainability [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. Agricultural waste has the potential to be utilized as renewable, bio-based fillers in the synthesis of PUR composites [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Coir Fibers Treated with Henna as a Potential Reinforcing Filler in the Synthesis of Polyurethane Composites

2021

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In this study, coir fibers were successfully modified with henna (derived from the Lawsonia inermis plant) using a high-energy ball-milling process. In the next step, such developed filler was used as a reinforcing filler in the production of rigid polyurethane (PUR) foams. The impact of 1, 2, and 5 wt % of coir-fiber filler on structural and physico-mechanical properties was evaluated. Among all modified series of PUR composites, the greatest improvement in physico-mechanical performances was observed for PUR composites reinforced with 1 wt % of the coir-fiber filler. For example, on the addition of 1 wt % of coir-fiber filler, the compression strength was improved by 23%, while the flexural strength increased by 9%. Similar dependence was observed in the case of dynamic-mechanical properties—on the addition of 1 wt % of the filler, the value of glass transition temperature increased from 149 °C to 178 °C, while the value of storage modulus increased by ~80%. It was found that PUR composites reinforced with coir-fiber filler were characterized by better mechanical performances after the UV-aging.

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“…The presence of the plasticizing filler prevents brittle fractures during quasi-static and dynamic loading. A much more in-depth analysis of the influence of the oil contained by linseed cake on mechanical, thermal, thermomechanical, and structural properties of polylactide-based composites can be found in our previous studies [ 18 , 19 , 31 ].…”

Section: Resultsmentioning

confidence: 99%

“…As a result of the presence of various components such as rigid lignocellulosic particles and the oil fraction, LC is an effective filler for PLA. As it was shown in our previous studies, the linseed oil contained in this waste filler has the most significant impact on the properties of the resulting composites, improving the crystallization rate [ 18 ], reducing the brittleness of the material [ 19 ], and changing its sub-zero mechanical properties [ 20 ]. The LC-filled polylactide composites are complex multiphase materials that are gaining ground in scientific research and potential high-quality polymeric composites, which can be used in various industrial applications, but the tribological properties such as friction, wear, and hardness of the composites modified with linseed cake is still an obscure area.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Oil-Rich Waste Fillers’ Influence on the Tribological Properties of Polylactide-Based Composites

et al. 2022

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In recent years, natural-based polymeric composites have gained the attention of researchers and the industry due to their low environmental impact and good applicational properties. A promising example of these materials is polylactide-based composites filled with linseed cake. Even though they can be characterized by reduced brittleness and enhanced crystallization rate, their applicational potential cannot be fully evaluated without knowing their tribological properties. This paper is aimed to analyze the influence of the oil contained by the filler on the mechanical and frictional properties of polylactide-based composites. Specimens of unfilled polylactide and its composites containing 10 wt % of linseed cake with different oil content were prepared by injection molding. Their microhardness was measured by the Vickers method. The softening temperature was determined by the Vicat method. The scratch resistance of the samples was tested with the loading of 10, 20, and 40 N. The coefficient of friction was evaluated by the pin-on-plate method, using CoCrMo alloy as the counter surface. It was found that the oil content in the filler does not directly influence the mechanical and tribological properties, but the composite samples present comparable hardness and lower coefficient of friction than the unfilled polymer, so they can be a good eco-friendly alternative to the unfilled polylactide when the frictional properties are an important factor.

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Crystallization of polylactide-based green composites filled with oil-rich waste fillers

Cited by 31 publications

References 61 publications

Mechanical, Thermal and Microstructural Characteristic of 3D Printed Polylactide Composites with Natural Fibers: Wood, Bamboo and Cork

Mechanical, Thermal and Microstructural Characteristic of 3D Printed Polylactide Composites with Natural Fibers: Wood, Bamboo and Cork

Coir Fibers Treated with Henna as a Potential Reinforcing Filler in the Synthesis of Polyurethane Composites

Evaluation of the Oil-Rich Waste Fillers’ Influence on the Tribological Properties of Polylactide-Based Composites

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