[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

Review of iron-free Fenton-like systems for activating H2O2 in advanced oxidation processes

Adsorptive removal of hazardous materials using metal-organic frameworks (MOFs): A review

A review of trends and limitations in hydrogel-rapid prototyping for tissue engineering

Catalytic oxidation of volatile organic compounds (VOCs) – A review

https://biblio.ugent.be/publication/792032/file/8599453.pdf

Nonthermal Plasma Technology as a Versatile Strategy for Polymeric Biomaterials Surface Modification: A Review

Non-thermal plasmas for non-catalytic and catalytic VOC abatement.

Besides their use as packaging materials, biodegradable polymers can play a major role in tissue engineering as three-dimensional porous structures (scaffolds). The success of these biodegradable scaffolds is, however, determined by the response it elicits from the surrounding biological environment and this response is governed, to a large extent, by the surface characteristics of the scaffold. Multiple approaches have been developed to obtain the desired surface properties, however, in the past decade, the use of non-thermal plasmas for selective surface modification has been a rapidly growing research field. This paper therefore presents a critical overview on recent advances in plasma-assisted surface modification of biodegradable polymers.

Plasma Surface Modification of Biodegradable Polymers: A Review

Polymers are commonly used in industry because of their excellent bulk properties, such as strength and good resistance to chemicals. Their surface properties are for most application inadequate due to their low surface energy. A surface modification is often needed, and plasma surface modification is used with success the past decades. In the past few years, also plasma surface modification for biomedical polymers has been investigated. For biomedical polymers, the surface properties need to be altered to promote a good cell adhesion, growth and proliferation and to make them suitable for implants and tissue engineering scaffolds. This review gives an overview of the use of plasma surface modification of biomedical polymers and the influence on cell-material interactions. First, an introduction on cell-material interaction and on antibacterial and antifouling surfaces will be given. Also, different plasma modifying techniques used for polymer surface modification will be discussed. Then, an overview of literature on plasma surface modification of biopolymers and the resulting influence on cell-material interaction will be given. After an overview of plasma treatment for improved cell-material interaction, plasma polymerization and plasma grafting techniques will be discussed. Some more specialized applications will be also presented: the treatment of 3D scaffolds for tissue engineering and the spatial control of cell adhesion. Antibacterial and antifouling properties, obtained by plasma techniques, will be discussed. An overview of research dealing with antibacterial surfaces created by plasma techniques will be given, antifouling surfaces will be discussed, and how blood compatibility can be improved by preventing protein adhesion.

/pdf/plasma-surface-modification-of-biomedical-polymers-influence-51xmluswak.pdf

Plasma Surface Modification of Biomedical Polymers: Influence on Cell-Material Interaction

The stability of metal-organic frameworks (MOFs) typically decreases with an increasing number of defects, limiting the number of defects that can be created and limiting catalytic and other applications. Herein, we use a hemilabile (Hl) linker to create up to a maximum of six defects per cluster in UiO-66. We synthesized hemilabile UiO-66 (Hl-UiO-66) using benzene dicarboxylate (BDC) as linker and 4-sulfonatobenzoate (PSBA) as the hemilabile linker. The PSBA acts not only as a modulator to create defects but also as a coligand that enhances the stability of the resulting defective framework. Furthermore, upon a postsynthetic treatment in H2SO4, the average number of defects increases to the optimum of six missing BDC linkers per cluster (three per formula unit), leaving the Zr-nodes on average sixfold coordinated. Remarkably, the thermal stability of the materials further increases upon this treatment. Periodic density functional theory calculations confirm that the hemilabile ligands strengthen this highly defective structure by several stabilizing interactions. Finally, the catalytic activity of the obtained materials is evaluated in the acid-catalyzed isomerization of α-pinene oxide. This reaction is particularly sensitive to the Bronsted or Lewis acid sites in the catalyst. In comparison to the pristine UiO-66, which mainly possesses Bronsted acid sites, the Hl-UiO-66 and the postsynthetically treated Hl-UiO-66 structures exhibited a higher Lewis acidity and an enhanced activity and selectivity. This is further explored by CD3CN spectroscopic sorption experiments. We have shown that by tuning the number of defects in UiO-66 using PSBA as the hemilabile linker, one can achieve highly defective and stable MOFs and easily control the Bronsted to Lewis acid ratio in the materials and thus their catalytic activity and selectivity.

https://biblio.ugent.be/publication/8644253/file/8663431.pdf

Nathalie De Geyter

Papers

Nonthermal Plasma Technology as a Versatile Strategy for Polymeric Biomaterials Surface Modification: A Review

Non-thermal plasmas for non-catalytic and catalytic VOC abatement.

Plasma Surface Modification of Biodegradable Polymers: A Review

Plasma Surface Modification of Biomedical Polymers: Influence on Cell-Material Interaction

Engineering a Highly Defective Stable UiO-66 with Tunable Lewis- Brønsted Acidity: The Role of the Hemilabile Linker.