Poly(lactic acid) (PLA) is an important biobased biodegradable plastics but its inherent crystallization rate is slow. Organic self-assembly nucleating agents have shown excellent nucleating effect in enhancing PLA crystallization. However, the relationship between the chemical structures of organic nucleating agents and their nucleating ability is still not yet well elucidated. Herein, the effect of tramethylenedicarboxylic dibenzoylhydrazide (TMBH) and octamethylenedicarboxylic dibenzoylhydrazide (OMBH) ranging from 0.1 wt% to 2.0 wt% on PLA crystallization was compared. The crystallization temperature (T) of PLA shows a bell-shaped relationship with the concentration of TMBH and the highest T is reached at 0.25 wt% of TMBH; while the T of PLA increases with increasing OMBH concentration until 1 wt% and a slight decrease is observed at 2 wt% of OMBH. The nucleation ability is the best for TMBH at 0.25 wt% loading. The crystalline morphologies were characterized by combining optical and atomic force microscopies, and correlated with the solubility of nucleating agent in PLA. The crystallization mechanism was probed by time-resolved Fourier transform infrared spectroscopy. More importantly, PLA/TMBH blends achieve good balance between heat resistance and transparency at 0.25 wt% of TMBH. It can be concluded that TMBH is better than OMBH in promoting PLA crystallization.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ijbiomac.2025.141423 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Enhancing phosphorus recovery from poultry litter ash through microwave-assisted thermochemical treatment for improving its solubility.
J Environ Manage
March 2025
INSTM and Chemistry for Technologies Laboratory, University of Brescia, Via Branze 38, 25123, Brescia, Italy. Electronic address:
This study explores for the first time the P recovery from poultry litter ash (PLA) using microwave-assisted thermochemical treatment, aiming to improve its bioavailability for utilization as a fertilizer. PLA samples, originating from laying hens' manure incineration, were subjected to microwave treatment with the addition of sodium bicarbonate, and their physical-chemical characteristics were analyzed using X-ray fluorescence (XRF), X-ray diffraction (XRD), and scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS). The results indicate that the microwave treatment led to the formation of NaCaPO crystals, with a significant increase in P solubility post-treatment, which is crucial for plant uptake.
View Article and Find Full Text PDFIn Vitro Characterization of a Cyclosporine Eluted Polymeric Stent Manufactured by Liquid Crystal Display 3D Technology.
AAPS PharmSciTech
March 2025
Pharmaceutics Research Laboratory, Arundel Building, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, UK.
Coronary artery blockage, the most common cardiovascular problem, is often treated with drug-eluting stents (DES). This study aims to address the main limitation of traditional angioplasty therapy. Thus, designing, fabricating, and analyzing a novel drug-eluting polymeric stent using liquid crystal display (LCD) technology may potentially represent an innovative approach to DES in the near future.
View Article and Find Full Text PDFInjectable biodegradable microchamber array films for long-term delivery of glucocorticoids.
J Control Release
February 2025
Biochemical Pharmacology, William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, United Kingdom. Electronic address:
Glucocorticoids (GCs) are widely recognized for their potent anti-inflammatory and analgesic effects. Although they can cause an array of side effects when delivered systemically these are generally avoided when delivered locally at disease sites such as the eyes, lungs and joints. Glucocorticoid formulations for local use range from crystals and particles through to non-biodegradable implants.
View Article and Find Full Text PDFMechanical Rejuvenation of Polylactide: Critical Role of Mobile Amorphous Phase.
Macromol Rapid Commun
February 2025
Zhejiang Key Laboratory of Bio-based Polymeric Materials Technology and Application, Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Materials Technology and Engineering (NIMTE), CAS, Ningbo, 315201, P. R. China.
Polylactide (PLA) becomes brittle shortly after physical aging, posing significant challenges for practical applications. This issue can be effectively overcome through a pre-melt-stretching process, known as mechanical rejuvenation. However, the underlying mechanisms remain poorly understood due to the intricate multilevel structures in pre-stretched PLA and their evolution during physical aging.
View Article and Find Full Text PDFCrystallization behavior of poly(lactic acid) nucleated by benzoylhydrazide compounds with different methylene numbers: A comparative study.
Int J Biol Macromol
February 2025
State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China. Electronic address:
Poly(lactic acid) (PLA) is an important biobased biodegradable plastics but its inherent crystallization rate is slow. Organic self-assembly nucleating agents have shown excellent nucleating effect in enhancing PLA crystallization. However, the relationship between the chemical structures of organic nucleating agents and their nucleating ability is still not yet well elucidated.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!