Crystallization Behavior of Vetiver Grass Fiber-Polylactic Acid Composite

Boonying, Somruetai; Sutapun, Wimonlak; Suppakarn, Nitinat; Ruksakulpiwat, Yupaporn

doi:10.4028/www.scientific.net/amr.410.55

Cited by 7 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, to calculate crystallinity and further reveal thermal behavior of the PLA and biocomposites, a Differential Scanning Calorimeter (DSC) (TA Instruments Discovery 250 series) was utilized. PLA and biocomposites were heated from 25 to 200°C with a heating rate of 10°C/min under a nitrogen atmosphere to determine crystallization rates, cold crystallization (T cc ), and melting temperatures (T m1 and T m2 ) 24 . Then samples were cooled down from 200 to 25°C with the same cooling rate.…”

Section: Methodsmentioning

confidence: 99%

“…PLA and biocomposites were heated from 25 to 200 C with a heating rate of 10 C/ min under a nitrogen atmosphere to determine crystallization rates, cold crystallization (T cc ), and melting temperatures (T m1 and T m2 ). 24 Then samples were cooled down from 200 to 25 C with the same cooling rate. The thermal data from the second heating cycle were used to measure crystallinity, T cc , T m1 , and T m2 .…”

Section: Chemical Thermal and Morphologic Analysismentioning

confidence: 99%

See 1 more Smart Citation

Preparation and characterization of hybrid PLA biocomposites reinforced by wood and silane treated basalt fibers or compatibilized by maleic anhydride‐grafted polypropylene (MAPP)

Ermeydan,

Aykanat,

Altın

2024

Polymer Composites

View full text Add to dashboard Cite

In this study, basalt and/or beech wood fibers were treated with vinyltrimethoxysilane or compatibilized by maleic anhydride‐ grafted polypropylene (MAPP) to produce hybrid polylactic acid (PLA) biocomposites. Twin‐screw extruder was used to produce biocomposites, following by a hot press to form samples. Physical and mechanical properties of composites that were produced from both treated and untreated fibers were compared. Chemical, morphological, and thermal analysis of biocomposites were analyzed with TGA, FTIR and SEM, respectively. The results showed that silane treated basalt/wood fiber reinforced PLA (PBWS) and silane treated basalt reinforced PLA (PBS) have significantly better flexural strength than neat PLA. Besides, basalt reinforced bio‐composites except PBW3 and PBWM variations have significantly superior impact strength than neat PLA. Utilization of compatibilizers also reduced thickness swelling and water uptake features of biocomposites. All the above experimental data showed that the utilization of silane compatibilizer has better impact on properties than MAPP for such wood/basalt hybrid composite.Highlights Hybrid biocomposites with wood and basalt fibers by using coupling agents were prepared for the first time. Hybridization of organic and inorganic fibers gave promising results. Silane and maleic anhydride compatibilization improves physical properties. Vinyltrimethoxy silane grafted basalt fiber improves flexural strength significantly. Silanization of wood or basalt fibers enhances significantly the impact strength.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Chemical Thermal and Morphologic Analysismentioning

confidence: 99%

Preparation and characterization of hybrid PLA biocomposites reinforced by wood and silane treated basalt fibers or compatibilized by maleic anhydride‐grafted polypropylene (MAPP)

Ermeydan,

Aykanat,

Altın

2024

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…The percentage of crystallinity was determined by Equation 1, while w is the fraction of PLA in composite and ∆H m is the melting enthalpy. The ∆H 0 m is the enthalpy of melting for 100% crystalline PLA and is determined to be 93.7J/g (24).…”

Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 99%

A Long-Lasting Triamcinolone-Loaded Microneedle Patch for Prolonged Dermal Delivery

Zarei Chamgordani,

Asiaei,

Ghorbani-Bidkorpeh

et al. 2024

Iran J Pharm Res

View full text Add to dashboard Cite

Background: Scar is an unpleasant skin lesion that occurs following deep wounds or burns. The application of local triamcinolone is a common treatment for scar treatment and prevention, which should be repeated several times in conventional dosage forms. An effort has been made here to provide a prolonged triamcinolone dermal delivery by microneedle technology, which can also be used for wound closure. Objectives: This study aimed to develop a long-lasting polylactic acid (PLA) microneedle patch for the prolonged release of triamcinolone acetonide (TrA) that could potentially be used for closure of wound edges and scar prevention and treatment. Methods: In this study, 3% and 10% TrA-containing polymeric microneedles were fabricated using the micro molding-solvent casting method. Optical microscopy, X-ray diffraction analysis (XRD), Fourier-transform infrared spectroscopy (FT-IR), and differential scanning calorimetry (DSC) were used for the characterization of microneedles. Mechanical strength was evaluated using a compression test and methylene blue staining. Additionally, the insertion depth was determined by histopathological sectioning of human skin samples and also insertion into Parafilm®M as a skin model. The in vitro drug release profile of the microneedles was studied over 34 days, and the kinetic model was determined. The ex-vivo skin permeation of TrA was studied using a Franz-diffusion cell. Results: The TrA-containing PLA microneedles were fabricated with a uniform structure without any failure, deterioration, or loss of needles. Fourier-transform infrared spectroscopy and differential scanning calorimetry showed no interaction between TrA and PLA, and no effect on crystallinity and thermal behavior of TrA on polymer was detected. Microneedles showed appropriate mechanical properties, which were able to penetrate to about 900 - 1000 μm depth. Release profile from the whole body of 10% and 3% microneedle fitted to Higuchi model with cumulative amounts of 625 µg and 201.64 µg over 34 days. Release from the needles followed zero-order kinetic with cumulative amounts of 30.04 µg and 20.36 µg for 10% and 3%, respectively, for 34 days. Permeation was calculated to be 17 µg/day for 10% TrA-containing microneedle. Conclusions: The results suggested that suitable PLA microneedles containing TrA with prolonged release behavior can be successfully constructed with the solvent casting method.

show abstract

“…Finally, it was heated again to 180 • C with heating rate 5 • C/min (2nd heating scan). The degree of crystallinity (X c ) of PLA and PLA composites was estimated using Equation (1) [36,37]:…”

Section: Thermal Propertiesmentioning

confidence: 99%

Effects of Titanium–Silica Oxide on Degradation Behavior and Antimicrobial Activity of Poly (Lactic Acid) Composites

Teamsinsungvon

Ruksakulpiwat

2022

Polymers

Self Cite

View full text Add to dashboard Cite

A mixed oxide of titania–silica oxides (TixSiy oxides) was successfully prepared via the sol–gel technique from our previous work. The use of TixSiy oxides to improve the mechanical properties, photocatalytic efficiency, antibacterial property, permeability tests, and biodegradability of polylactic acid (PLA) was demonstrated in this study. The influence of different types and contents of TixSiy oxides on crystallization behavior, mechanical properties, thermal properties, and morphological properties was presented. In addition, the effect of using TixSiy oxides as a filler in PLA composites on these properties was compared with the use of titanium dioxide (TiO2), silicon dioxide (SiO2), and TiO2SiO2. Among the prepared biocomposite films, the PLA/TixSiy films showed an improvement in the tensile strength and Young’s modulus (up to 5% and 31%, respectively) in comparison to neat PLA films. Photocatalytic efficiency to degrade methylene blue (MB), hydrolytic degradation, and in vitro degradation of PLA are significantly improved with the addition of TixSiy oxides. Furthermore, PLA with the addition of TixSiy oxides exhibited an excellent antibacterial effect on Gram-negative bacteria (Escherichia coli or E. coli) and Gram-positive bacteria (Staphylococcus aureus or S. aureus), indicating the improved antimicrobial effectiveness of PLA composites. Importantly, up to 5% TixSiy loading could promote more PLA degradation via the water absorption ability of mixed oxides. According to the research results, the PLA composite films produced with TixSiy oxide were transparent, capable of screening UV radiation, and exhibited superior antibacterial efficacy, making them an excellent food packaging material.

show abstract

Crystallization Behavior of Vetiver Grass Fiber-Polylactic Acid Composite

Cited by 7 publications

References 16 publications

Preparation and characterization of hybrid PLA biocomposites reinforced by wood and silane treated basalt fibers or compatibilized by maleic anhydride‐grafted polypropylene (MAPP)

Preparation and characterization of hybrid PLA biocomposites reinforced by wood and silane treated basalt fibers or compatibilized by maleic anhydride‐grafted polypropylene (MAPP)

A Long-Lasting Triamcinolone-Loaded Microneedle Patch for Prolonged Dermal Delivery

Effects of Titanium–Silica Oxide on Degradation Behavior and Antimicrobial Activity of Poly (Lactic Acid) Composites

Contact Info

Product

Resources

About