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3D-Printed PCL-Based Scaffolds with High Nanosized Synthetic Smectic Clay Content: Fabrication, Mechanical Properties, and Biological Evaluation for Bone Tissue Engineering.
Int J Nanomedicine
January 2025
Interdisciplinary Laboratory for Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program (PPGCM), Federal University of Piauí (UFPI), Teresina, PI, Brazil.
Background: The 3D printing of macro- and mesoporous biomimetic grafts composed of polycaprolactone (PCL) infused with nanosized synthetic smectic clay is a promising innovation in biomaterials for bone tissue engineering (BTE). The main challenge lies in achieving a uniform distribution of nanoceramics across low to high concentrations within the polymer matrix while preserving mechanical properties and biological performance essential for successful osseointegration.
Methods: This study utilized 3D printing to fabricate PCL scaffolds enriched with nanosized synthetic smectic clay (LAP) to evaluate its effects on structural, chemical, thermal, mechanical, and degradative properties, with a focus on in vitro biological performance and non-toxicity.
Natural cellulose fibers derived from Dracaena angolensis (Welw. ex Carrière) Byng & Christenh. demonstrate potential as a non-absorbable surgical suture biomaterial.
Sci Rep
January 2025
Department of Pharmacology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.
Sutures from natural and synthetic materials are utilized to close wounds, stop bleeding, reduce pain and infection, repair cutaneous wounds, minimize scarring, and promote optimal wound healing. We used mechanical and chemical methods to extract cellulose fibers from cylindrical snake grass (Dracaena angolensis) (Welw. ex Carrière) Byng & Christenh.
View Article and Find Full Text PDFThermoformed, thermostable, waterproof and mechanically robust cellulose-based bioplastics enabled by dynamically reversible thia-Michael reaction.
Int J Biol Macromol
January 2025
The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China. Electronic address:
Cellulose is a renewable biodegradable polymer derived from abundant natural resources. Substituting petroleum-based polymers with cellulose-based bioplastics is an effective way to alleviate environmental issues like resource depletion and white pollution. However, challenges such as poor thermostability, hard to thermoform and water sensitivity seriously hinder the fabrication and use of cellulose-based bioplastics.
View Article and Find Full Text PDFHighly hydrophobic calixarene polymers for efficient enrichment of polar nitrobenzene compounds.
Talanta
January 2025
Ministry of Education (MOE) Key Laboratory of Bioinorganic and Synthetic Chemistry, Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou, 510006, PR China; School of Chemical Engineering and Technology, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), 519082, Zhuhai, PR China; Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals, Guangdong Provincial Engineering Research Center for Ambient Mass Spectrometry, Institute of Analysis, Guangdong Academy of Sciences (China National Analytical Center Guangzhou), 100 Xianlie Middle Road, Guangzhou, 510070, PR China; Chemistry College, Center of Advanced Analysis and Gene Sequencing, Zhengzhou University, Kexue Avenue 100, Zhengzhou, 450001, PR China.
Macrocyclic polymer materials exhibit excellent selectivity and adsorption performance in pollutant adsorption due to unique host-guest recognition. Herein, three kinds of calixarene polymers (C4P, C6P and C8P) were synthesized through Sonogashira reaction, and were characterized through H NMR, FT-IR, SEM, and TEM. The water contact angle experiments revealed that three kinds of calixarene polymers were highly hydrophobic, and they all exhibited high enrichment efficiency for weak polar chloro-substituted benzene compounds (chlorobenzene, o-chlorotoluene, p-dichlorobenzene and o-dichlorobenzene) and BTEX (benzene, toluene, ethylbenzene and xylenes).
View Article and Find Full Text PDFIsolation and Structure Elucidation of the Heterocumulene Anions [NCC-L]- (L = CO, CS, N2).
Angew Chem Int Ed Engl
January 2025
Ruhr-Universitat Bochum, Faculty of Chemistry and Biochemistry, Universitätsstraße 150, 44780, Bochum, GERMANY.
Cumulenes are molecules characterized by a series of consecutive double bonds. They serve as important reagents and intermediates in the synthesis of polymers and a wide variety of functionalized compounds, including various heterocycles. Understanding the properties of cumulenes and developing synthetic routes to these often highly reactive species is essential for unlocking new applications.
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