A novel approach to the preparation of powder coating—Manufacture of polyacrylate powder coatings via one step minisuspension polymerization

SummaryIschaemia-reperfusion injury (IRI) poses a major challenge in many thrombotic conditions and in whole organ transplantation. Activation of the endothelial cells and shedding of the protective vascular glycocalyx during IRI increase the risk of innate immune activation, cell infiltration and severe thrombus formation, promoting damage to the tissue. Here, we present a novel one-step strategy to protect the vasculature by immobilisation of a unique multi-arm heparin conjugate to the endothelium. Applying a new in vitro blood endothelial cell chamber model, the heparin conjugate was found to bind not only to primary human endothelial cells but also directly to the collagen to which the cells adhered. Incubation of hypoxic endothelial cells with freshly drawn human blood in the blood chambers elicited coagulation activation reflected by thrombin anti-thrombin formation and binding of platelets and neutrophils. Immobilisation of the heparin conjugate to the hypoxic endothelial cells created a protective coating, leading to a significant reduction of the recruitment of blood cells and coagulation activation compared to untreated hypoxic endothelial cells. This novel approach of immobilising multi-arm heparin conjugates on the endothelial cells and collagen of the basement membrane ensures to protect the endothelium against IRI in thrombotic disorders and in transplantation.

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EFFICIENCY OF MODIFYING ADDITIVES IN POWDER COATING MATERIALS

Bulletin of Odessa State Academy of Civil Engennering and Architecture ◽

10.31650/2415-377x-2021-83-47-57 ◽

2021 ◽

pp. 47-57

Author(s):

V.І. Gots ◽

◽

О.V. Lastivka ◽

О.О. Tomin ◽

◽

...

Keyword(s):

Surface Tension ◽

Silicon Dioxide ◽

Mechanical Characteristics ◽

Powder Coating ◽

Coating Film ◽

Powder Coatings ◽

High Effectiveness ◽

Modifying Additives ◽

Polymer Resin ◽

Technical Specifications

Rapid rates of development in production of powder coatings are, in comparison to liquid paint-and-lacquer materials, evidence of their importance, high effectiveness and prospectivity. The increase in popularity of powder coatings can be explained by their environmental adequacy and attractiveness from the perspective of the environmental protection as well as high effectiveness related to the possibility of obtaining high quality protective and decorative coatings during the one-layer application. At the same time, it is obvious that during modern powder coating-and-lacquer materials have not exhausted all possibilities of improving pharmaceutical compositions and expanding the assortment as well as modernizing their production technology the relatively short period of their development. The composition of the thermosetting powder coating contains five key components: polymer resin, hardener, pigments, fillers and functional additives. In general, the polymer resin and hardener play a key role in ensuring necessary mechanical characteristics and lifespan of the powder coating. In this case, the role of functional (modifying) additives is extremely important to obtain characteristics that are often fundamentally required to meet predetermined technical specifications of the products and needs of end users. Additives play an important role in forming properties of powder coatings and coatings based on them as they have become their integral part for several main reasons: because of control of rheological properties, surface defects as well as light and temperature stabilization of coatings. The study deals influence of modifying additives on properties of the powder coating. The authors using rheological and degassing modifying additives with different nature of the main active substance. It was found that the additives based on the acrylate polymer adsorbed on the silicon dioxide in the form of Byk-3900P and on the polyoxyethylene derivative of the castor oil in the form of Luvotix R400 decreasing the surface tension in the coating film, which, in its turn, contributes to the increase in the wettability of base during the melting of the powder coating, decrease the ‘orange peel’ effect during the cross-linking, reduction in pinholes on the obtained surface and improvement of mechanical characteristics of the coating. At the same time, rheological additives based on the bentonite in the form of Luvogel 4B and on the hydrophilic silicon dioxide in the form of Cab-o-sil M5 cause the increase in the surface tension in the coating film, which, in its turn, leads to the worsening of flow, appearance and mechanical characteristics of the powder coating.

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TCI Powder Coatings launches TruAnodize powder coating

Focus on Powder Coatings ◽

10.1016/j.fopow.2015.05.028 ◽

2015 ◽

Vol 2015 (6) ◽

pp. 5

Keyword(s):

Powder Coating ◽

Powder Coatings

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Deep-learning-based macro-pixel synthesis and lossless coding of light field images

APSIPA Transactions on Signal and Information Processing ◽

10.1017/atsip.2019.14 ◽

2019 ◽

Vol 8 ◽

Cited By ~ 3

Author(s):

Ionut Schiopu ◽

Adrian Munteanu

Keyword(s):

Light Field ◽

State Of The Art ◽

View Synthesis ◽

Base Layer ◽

Synthesis Process ◽

Enhancement Layer ◽

Novel Approach ◽

Average Improvement ◽

Lossless Coding ◽

One Step

Abstract This paper proposes a novel approach for lossless coding of light field (LF) images based on a macro-pixel (MP) synthesis technique which synthesizes the entire LF image in one step. The reference views used in the synthesis process are selected based on four different view configurations and define the reference LF image. This image is stored as an array of reference MPs which collect one pixel from each reference view, being losslessly encoded as a base layer. A first contribution focuses on a novel network design for view synthesis which synthesizes the entire LF image as an array of synthesized MPs. A second contribution proposes a network model for coding which computes the MP prediction used for lossless encoding of the remaining views as an enhancement layer. Synthesis results show an average distortion of 29.82 dB based on four reference views and up to 36.19 dB based on 25 reference views. Compression results show an average improvement of 29.9% over the traditional lossless image codecs and 9.1% over the state-of-the-art.

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One-step formation of three-dimensional macroporous bacterial sponges as a novel approach for the preparation of bioreactors for bioremediation and green treatment of water

RSC Advances ◽

10.1039/c8ra04219e ◽

2018 ◽

Vol 8 (54) ◽

pp. 30813-30824 ◽

Cited By ~ 3

Author(s):

Areej K. Al-Jwaid ◽

Dmitriy Berillo ◽

Irina N. Savina ◽

Andrew B. Cundy ◽

Jonathan L. Caplin

Keyword(s):

Porous Structure ◽

Phenol Degradation ◽

Three Dimensional ◽

Novel Approach ◽

Live Bacteria ◽

One Step ◽

Novel Method

A novel method of crosslinking live bacteria into a stable 3D porous structure and its subsequent use in phenol degradation is reported.

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Study of rheological behaviours of electrostatic thermoset powder coatings

e-Polymers ◽

10.1515/epoly.2009.9.1.1667 ◽

2009 ◽

Vol 9 (1) ◽

Author(s):

Morteza Ehsani ◽

Ali Akbar Yousefi ◽

Saeed Samiei Yeganeh

Keyword(s):

Mechanical Properties ◽

Dynamic Viscosity ◽

Physical And Mechanical Properties ◽

Powder Coating ◽

Curing Temperature ◽

Design Parameters ◽

Powder Coatings ◽

Gel Time ◽

Rheological Measurements ◽

The Impact

AbstractThe use of dynamic viscosity/time (temperature) cure curves is seen as a powerful technique to quantify formulation and resin design parameters. The behaviour of different thermoset powder coating systems, epoxy/polyester (50/50, 40/60 and 30/70) as well as the impact of the filler, the curing temperature and the frequency upon gel-time have been examined based upon the rheological measurements and compared with PE/TGIC systems. Two disparate methodologies have been utilized to determine gel-time. The behaviour of dissimilar systems bearing different formulations has been compared by means of the non-isothermal DSC test. The effects of resin percentage and the formulation on physical and mechanical properties of coating have been studied.

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An easy and novel approach to prepare Fe3O4–reduced graphene oxide composite and its application for high-performance lithium-ion batteries

RSC Advances ◽

10.1039/c5ra07347b ◽

2015 ◽

Vol 5 (77) ◽

pp. 62913-62920 ◽

Cited By ~ 20

Author(s):

Xianhong Chen ◽

Xin Lai ◽

Jinhui Hu ◽

Long wan

Keyword(s):

Graphene Oxide ◽

Lithium Ion Batteries ◽

Reduced Graphene Oxide ◽

High Performance ◽

Solvothermal Method ◽

Reduction Process ◽

Lithium Ion ◽

Novel Approach ◽

Reduced Graphene ◽

One Step

A ferroferric oxide–reduced graphene oxide (Fe3O4–rGO) composite is prepared by a facile one-step solvothermal method in which the reduction process of graphene oxide (GO) into rGO was accompanied by the generation of Fe3O4 particles.

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Copper(i)-catalyzed N–H olefination of sulfonamides for N-sulfonyl enaminone synthesis

Chemical Communications ◽

10.1039/c8cc04385j ◽

2018 ◽

Vol 54 (60) ◽

pp. 8403-8406 ◽

Cited By ~ 7

Author(s):

Xiao Liang ◽

Xin Huang ◽

Mingteng Xiong ◽

Kexin Shen ◽

Yuanjiang Pan

Keyword(s):

Carbonyl Group ◽

Novel Approach ◽

One Step

A novel approach for synthesis of N-sulfonyl enaminones in one-step from saturated ketones and provide an entry into accessing functionalization at α- and β-position of carbonyl group simultaneously.

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