Results 41 to 50 of about 165,650 (289)

Effects of Graphene Nanoplatelets and Multiwall Carbon Nanotubes on the Structure and Mechanical Properties of Poly(lactic acid) Composites: A Comparative Study

Applied Sciences, 2019
Poly(lactic acid)/graphene and poly(lactic acid)/carbon nanotube nanocomposites were prepared by an easy and low-cost method of melt blending of preliminary grinded poly(lactic acid) (PLA) with nanosized carbon fillers used as powder.
Todor Batakliev, Ivanka Petrova-Doycheva, Verislav Angelov, Vladimir Georgiev, Evgeni Ivanov, Rumiana Kotsilkova, Marcello Casa, Claudia Cirillo, Renata Adami, Maria Sarno, Paolo Ciambelli   +10 more
doaj   +1 more source

pH-Responsive Polyethylene Glycol Monomethyl Ether-ε-Polylysine-G-Poly (Lactic Acid)-Based Nanoparticles as Protein Delivery Systems. [PDF]

PLoS ONE, 2016
The application of poly(lactic acid) for sustained protein delivery is restricted by the harsh pH inside carriers. In this study, we synthesized a pH-responsive comb-shaped block copolymer, polyethylene glycol monomethyl ether-ε-polylysine-g-poly (lactic
Huiqin Liu, Yijia Li, Rui Yang, Xiujun Gao, Guoguang Ying   +4 more
doaj   +1 more source

Synthesis and characterization of poly(ester amide) from remewable resources through melt polycondensation

eXPRESS Polymer Letters, 2014
Biodegradable poly(ester amide)s (PEAs) were synthesized from lactic acid and 11-aminoundecanoic acid via melt polycondensation. Molecular weights, chemical structures and thermal properties of the poly(ester amide)s were characterized in terms of gel ...
B. B. Wang, Y. P. Ge, D. Yuan, Z. L. Luo
doaj   +1 more source

Biocomposites Based on Poly(Lactic Acid) Matrix and Reinforced with Lignocellulosic Fibers: The Effect of Fiber Type and Matrix Modification

Journal of Natural Fibers, 2022
In composite materials, two or more different components are combined to produce a new material with different characteristics from the individual components.
Aitor Arbelaiz, Unai Txueka, Iñaki Mezo, Ander Orue   +3 more
doaj   +1 more source

Miscibility Evaluation of Poly(L-Lactic Acid)/Poly(Lactic Acid-co-lysine) Blends [PDF]

Journal of Applied Biomaterials & Functional Materials, 2016
Background The amorphous poly(lactic acid- co-lysine) (PLL) with hydrophilic reactive groups was synthesized by the condensing copolymerization and the blending miscibility of poly(L-lactic acid) (PLLA) and PLL was investigated. Methods The miscibility of PLLA and PLL was evaluated by analyzing the thermal properties, crystallization behaviors, crystal
Junyan, Yao, Shijie, Zhang, Wudan, Li, Yujie, Li   +3 more
openaire   +2 more sources

Deep subcutaneous application of poly-L-lactic acid as a filler for facial lipoatrophy in HIV-infected patients [PDF]

, 2005
Introduction: Facial lipoatrophy is a crucial problem of HIV-infected patients undergoing highly active antiretroviral therapy (HAART). Poly-L-lactic acid (PLA), provided as New-Fill(R)/Sculptra(TM), is known as one possible treatment option. In 2004 PLA
Anonymous, Boix V, Borelli C, Bornhovd E, Buffet M, Carr A, Carr A, Carr A, Cofrancesco, Eppley BL, Grinspoon S, Group EPL, Hansen BR, James J, Mallon PW, Martinez E, McComsey G, Moyle G, Moyle GJ, Nolan D, Oppel T, Perry CM, Schurig V, Valantin MA, Villarroya F, Woerle B   +25 more
core   +1 more source

Biocomposite Optimization with NaOH-modified Bagasse Fiber, Polybutylene Succinate, and Poly(Lactic Acid) using RSM Approach

BioResources, 2023
Alkali-treated bagasse fiber was used as a process variable for optimization of the properties of polybutylene succinate/poly(lactic acid)-based biocomposites using Box-Behnken design (BBD) and response surface methodology (RSM).
Pei Pei, Rui Zou, Xinyao Wang, Jinyan Liu, Lulu Liu, Xiaoyu Deng, Xuehua Li, Menghui Yu, Jia Tan, Shizhong Li   +9 more
doaj   +2 more sources

Synthesis of biodegradable polyesteramides with pendant functional groups [PDF]

, 1992
Morpholine-2,5-dione derivatives having substituents with benzyl-protected carboxylic acid, benzyloxycarbonyl-protected amine and p-methoxy-protected thiol groups, respectively, were prepared in 29-58% yield by cyclization of the corresponding N-[(2RS ...
Dijkstra, Pieter J., Feijen, Jan, Veld, Peter J.A. in 't   +2 more
core   +3 more sources

Rethinking plastic waste: innovations in enzymatic breakdown of oil‐based polyesters and bioplastics

FEBS Open Bio, EarlyView.
Plastic pollution remains a critical environmental challenge, and current mechanical and chemical recycling methods are insufficient to achieve a fully circular economy. This review highlights recent breakthroughs in the enzymatic depolymerization of both oil‐derived polyesters and bioplastics, including high‐throughput protein engineering, de novo ...
Elena Rosini, Nicolò Antonelli, Gianluca Molla   +2 more
wiley   +1 more source

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

FEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source