The incorporation of biomass fillers into poly(lactic acid) (PLA) enantiomeric blends offers a novel strategy to promote stereocomplex (SC) crystallization while preserving the biodegradability of PLA. In this study, poly(vinyl acetate)-modified cellulose nanocrystals (CNC-PVAc) were prepared through a one-pot reaction and employed as nanofillers for PLA. The results indicate that CNC-PVAc enhances the crystallization of stereocomplex crystallites (SCs) while inhibiting the formation of homocrystallites (HCs). The selective nucleation induced by CNC-PVAc is closely associated with the enrichment of PVAc chains at the interface between CNCs and the PLA matrix. Due to the good miscibility between PVAc and PLA, PVAc enhances chain segment motility and suppresses the homocrystallization of poly(L-lactic acid) (PLLA) and poly(D-lactic acid) (PDLA), thereby facilitating the pairing and crystallization of PLA enantiomers into SCs. Furthermore, the nucleation and reinforcing effects of CNC-PVAc play a synergistic role in determining the properties of PLA based nanocomposites. The fabricated nanocomposites exhibit significant improvements in yield strength, Young's modulus, and heat distortion resistance, while maintaining the original biocompatibility and degradability of PLA. Overall, this study elucidates the nucleation mechanism of polymer-grafted CNCs on PLA SCs, and expanding the application potential of biobased fillers in biodegradable polymers.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.carbpol.2024.122716 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Multicenter study of thermal ablation versus partial thyroidectomy for paratracheal papillary thyroid microcarcinoma.
Eur Radiol
January 2025
Department of Ultrasound, The First Medical Center, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China.
Objective: To compare the clinical outcomes of patients with unifocal paratracheal papillary thyroid microcarcinoma (PTMC) after thermal ablation (TA) vs. partial thyroidectomy (PT).
Materials And Methods: This retrospective multicenter study included 436 patients with unifocal, clinical N0 paratracheal PTMC who underwent TA (210 patients) or PT (236 patients) between June 2014 and December 2020.
Atypical Patients With Severe Fever With Thrombocytopenia Syndrome.
J Med Virol
January 2025
State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China.
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne disease with a high fatality rate. The clinical diagnosis criteria mainly rely on white blood cell (WBC) and platelet (PLT), which, however, are of limited usage in identifying atypical SFTS. A multicenter study was performed in two hospitals from 2011 to 2023.
View Article and Find Full Text PDFmiR-199a-3p mitigates simulated microgravity-induced cardiac remodeling by targeting MEF2C.
FASEB J
January 2025
National Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China.
Microgravity-induced cardiac remodeling and dysfunction present significant challenges to long-term spaceflight, highlighting the urgent need to elucidate the underlying molecular mechanisms and develop precise countermeasures. Previous studies have outlined the important role of miRNAs in cardiovascular disease progression, with miR-199a-3p playing a crucial role in myocardial injury repair and the maintenance of cardiac function. However, the specific role and expression pattern of miR-199a-3p in microgravity-induced cardiac remodeling remain unclear.
View Article and Find Full Text PDFPlasma-Activated Water/Ultrasound as a Green Method to Modify Wood Fiber By-Product: Insights of Their Mechanical Performance in Polylactic Acid-Based Biofilms.
Biopolymers
March 2025
Centro de Investigación en Química Aplicada, Saltillo, Coahuila, Mexico.
Exploring new ecological and simultaneous processes to modify wood fibers (WF) by-products is a required pathway toward circular economy and sustainability. Thus, plasma-activated water (PAW) and ultrasound (U) were employed as alternative methods to modify WF in a continuous process. Such treatments promoted the etching and cavities on the WF surface that destabilized the hydrogen bonds of the hemicellulose and lignin molecules, increasing the cellulose fraction.
View Article and Find Full Text PDFIndividualized PEEP titration by lung compliance during one-lung ventilation: a meta-analysis.
Crit Care
January 2025
Department of Intensive Care Unit, The First Affiliated Hospital of Jinan University, Guangzhou, China.
Background: Despite the physiological advantages of positive end-expiratory pressure (PEEP), its optimal utilization during one-lung ventilation (OLV) remains uncertain. We aimed to investigate whether individualized PEEP titration by lung compliance is associated with a reduced risk of postoperative pulmonary complications during OLV.
Methods: We searched PubMed, Embase, and the Cochrane Central Register of Controlled Trials until April 1, 2024, to identify published randomized controlled trials that compared individualized PEEP titration by lung compliance with fixed PEEP during OLV.
Want 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!