Article
Polymer Science
Lidong Feng, Xinchao Bian, Gao Li, Xuesi Chen
Summary: By investigating the thermal properties, morphology, and thermal stability of PLLA/PDLA blends, a new stereoamorphous mesophase (sam-PLA) structure was discovered, and the relationship between different phases in the PLLA/PDLA blends was explored.
Article
Thermodynamics
Willian Hermogenes Ferreira, Cristina Tristao Andrade
Summary: The addition of rGO in PLA improved the crystallinity and thermal stability, increased molecular mobility, and significantly enhanced the thermally induced shape memory properties.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Chemistry, Applied
Yaowalak Srisuwan, Yodthong Baimark
Summary: This paper reports a study on flexible polymer blends made from PLLA-PEG-PLLA and TPS. The addition of TPS suppressed crystallizability of PLLA and PLLA-PEG-PLLA matrices, while greatly increasing the thermal stability of PLLA-PEG-PLLA. The PEG middle-blocks enhanced phase compatibility between PLLA-PEG-PLLA and TPS, resulting in ductile and flexible blend films.
CARBOHYDRATE POLYMERS
(2022)
Article
Chemistry, Multidisciplinary
Rong Wang, Xiaojie Sun, Lanlan Chen, Wenbin Liang
Summary: In this study, biodegradable blends of PGA and PBAT with in situ compatibilization using MDI were prepared. The addition of PBAT was found to increase the complex viscosity and storage modulus of the blends, leading to improved compatibility and impact strength. The morphology of the dispersed phase evolved from spherical structure to in situ microfiber, enhancing interfacial adhesion and improving toughness.
Article
Engineering, Environmental
Mehmet Topuz
Summary: Poly-(lactic acid) (PLA) based coatings are commonly used in biomedical alloys due to their biodegradable nature and enhanced adhesive strength at the interface. However, their hydrophobic surface feature prevents metal-tissue interaction. This study investigates the effect of halloysite nanotube (HNT) reinforcement on hydroxyapatite (HA) coated PLA coatings for better interaction and corrosion resistance. The results show that the HA/HNT reinforced coatings have improved homogeneity, pore size, adhesion strength, corrosion resistance, and calcium phosphates (CaPs) formation, making them suitable for prolonged physiological conditions.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Chemistry, Physical
Guangchao Ye, Wei Wang, Dapeng Fan, Ping He
Summary: The effects of femtosecond laser ablation on the surface morphology, surface chemical composition, and matrix properties of poly-lactic acid (PLA) were explored in this study, leading to changes in molecular weight, polydispersity, and transition temperature. These variations were related to the laser-matter interaction effects during the micromachining process.
APPLIED SURFACE SCIENCE
(2021)
Article
Thermodynamics
Qiuxuan Li, Ruyan Xu, Kun Chen, Mengfan Jing, Chuntai Liu, Changyu Shen, Yaming Wang
Summary: This study prepared nanocomposites by melt-mixing PEG and BNNS with PLA, finding varying effects on PLA crystallization under different conditions, while also evaluating the performance of the nanocomposites.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Composites
Tej Singh, Laszlo Lendvai, Gabor Dogossy, Gusztav Fekete
Summary: The study found that increasing wood waste content resulted in certain properties of the composite materials increasing, such as modulus, porosity, and water absorption, while other properties decreased such as density, tensile strength, impact strength, and stress at break. However, the flexural strength of the composites remained relatively constant. Differential scanning calorimetry analysis showed that wood waste helped increase the glass transition and cold crystallization temperature of PLA composites.
POLYMER COMPOSITES
(2021)
Article
Polymer Science
Hideto Tsuji, Kazumasa Iguchi, Yuki Arakawa
Summary: The research studied the effects of different molecular weights of crystalline blocks but similar overall molecular weights on the crystallization behavior, structure, morphology, and thermal properties of PLLA-b-PDLLA/PDLA-b-PDLLA blends. It was found that the incorporated long amorphous PDLLA blocks facilitated unique SC crystallization in the blends with different crystalline block fractions.
Article
Chemistry, Physical
Monica Vidotto, Branka Mihaljevic, Gordana Zauhar, Elvira Vidovic, Nadica Maltar-Strmecki, Damir Klepac, Srecko Valic
Summary: This study investigated the effects of gamma-radiation on PLA, a biodegradable polymer with wide applications. Results showed that the concentration and decay rate constant of radicals in PLA depend on the absorbed dose. Additionally, irradiated PLA exhibited a loss of material elasticity and an increase in brittleness with increasing absorbed dose.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Feven Mattews Michael, Mohammad Khalid, Gunasunderi Raju, Chantara Thevy Ratnam, Rashmi Walvekar, Nabisab Mujawar Mubarak
Summary: The study found that the interfacial adhesion between surface-treated NHA fillers and PLA matrix was improved with different chemical treatments. The viscoelastic and thermal properties of the nanocomposite materials were enhanced to varying degrees based on the type of surface treatment applied.
Article
Chemistry, Physical
Guida Carvalho, Patricia Coimbra
Summary: A dual drug delivery system based on electrospun fibers embedded with halloysite nanotubes has been developed, which is capable of simultaneous and sustained release of a hydrophilic and a hydrophobic drug. In vitro release tests demonstrate that this system can release the two loaded drugs continuously for three weeks in a biphasic pattern.
APPLIED CLAY SCIENCE
(2023)
Article
Polymer Science
Yaowalak Srisuwan, Yodthong Baimark
Summary: In this study, high-molecular-weight poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) triblock copolymer (PLLA-PEG-PLLA) was used as a biodegradable bioplastic. However, its high cost and poor thermal stability limited its applications. Native cassava starch was blended to reduce the production cost and improve the thermal stability. The interaction between starch and PEG increased the thermal stability and phase adhesion, resulting in flexible and hydrophilic films with potential applications in biomedical, packaging, and agricultural fields.
Article
Polymer Science
Eduardo Ruiz-Silva, Mirleth Rodriguez-Ortega, Luis Carlos Rosales-Rivera, Francisco Javier Moscoso-Sanchez, Denis Rodrigue, Ruben Gonzalez-Nunez
Summary: Blends of PLA/LMDPE with different weight ratios were prepared using rotational molding and two mixing strategies, DB and MB. Thermal, morphological, and mechanical analyses showed that the blends' thermal stability, morphology, and mechanical properties were affected by the blending technique. DB generated larger particle sizes compared to MB, and blends with different PLA contents exhibited synergistic effects in tensile and flexural properties.
Article
Biochemistry & Molecular Biology
Mahsa Delyanee, Atefeh Solouk, Somaye Akbari, Morteza Daliri
Summary: The study developed a novel nanocomposite with a highly porous structure that possesses good physicochemical characteristics for promoting hemostasis and wound healing. Experimental results demonstrate that functionalized HNT plays a crucial role in the properties of nanocomposites, with G3 generation of PAMAM functionalized HNT showing optimal hemostatic effects and the ability to enhance cellular behavior in vitro.
MACROMOLECULAR BIOSCIENCE
(2022)
