Surface Modification to Improve Properties of Materials

Mozetič, Miran

doi:10.3390/ma12030441

Cited by 138 publications

(76 citation statements)

References 46 publications

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“…Similar to other polyolefins, polyethylene is moderately hydrophobic material with a water contact angle (WCA) of about 90°. Its composition and structure prevent interaction with most other materials, therefore, the surface properties should be modified to assure for reasonable adhesion of any material connected to a product made from PE [ 1 ]. Nowadays, a standard technique for increasing the surface energy and thus increasing the adhesion properties is a brief treatment with gaseous plasma.…”

Section: Introductionmentioning

confidence: 99%

Plasma Activation of Polyethylene Powder

Šourková

Špatenka

2020

Polymers

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Polyethylene powder of average particle diameter of 160 µm was activated in a plasma reactor made from aluminum of volume 64 dm3 at the pressure 100 Pa. Dense oxygen plasma was sustained with a microwave discharge powered by a pulsed magnetron source of power 1 kW mounted onto the top flange of the plasma reactor. Polymer powder was treated in a batch mode with 0.25 kg/batch. The powder was placed into a stainless-steel dish mounted in the center of the reactor where diffusing plasma of low ion density, and the O-atom density of 2 × 1021 m−3 was sustained. The powder was stirred in the dish at the rate of 40 rpm. The evolution of powder wettability versus treatment time was measured using the Washburne method, and the surface composition was determined by X-ray Photoelectron Spectroscopy (XPS). The wettability versus the oxygen concentration assumed a parabolic behavior. The maximal oxygen concentration, as revealed by XPS, was 17.5 at. %, and the maximal increase of wettability was 220%. The efficiency of O-atoms utilization in these experimental conditions was about 10% taking into account the spherical geometry of dust particles and perfectly smooth surface. The method is scalable to large industrial systems.

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Section: Introductionmentioning

confidence: 99%

Plasma Activation of Polyethylene Powder

Šourková

Špatenka

2020

Polymers

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“…And increasing the plasma power while keeping the precursor flow rate constant results in faster deposition rates and subsequently thicker coatings, but with a higher oxide content. All conditions studied in [96] lead to superhydrophobic surfaces with static contact angles higher than 150°and contact angle hysteresis lower than 6°.…”

Section: Some Methods Of Physicoсhemical and Biological Modificationsmentioning

confidence: 96%

“…Recent trends in nanostructuring and functionalization of solid materials to improve their functional properties are analyzed in study [96]. The main focus of the authors is on the study of the morphology of the surface of solid materials.…”

Section: Some Methods Of Physicoсhemical and Biological Modificationsmentioning

confidence: 99%

“…Despite this, a solid material with a large surface area (and much larger than the geometric surface area) is still preferable. The author in [96] notes that the rough surface often provides better adhesion of the polymer coating to the substrate and is therefore preferred in many cases. For example, the contact surface area may be significantly increased compared to the geometric surface area by etching or deposition.…”

Section: Some Methods Of Physicoсhemical and Biological Modificationsmentioning

confidence: 99%

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Use of Physicochemical Modification Methods for Producing Traditional and Nanomodified Polymeric Composites with Improved Operational Properties

Kolosov

Сівецький

Kolosova

et al. 2019

International Journal of Polymer Science

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Various aspects of the methods of physical and physicochemical modification of components of filled thermoplastic composite materials are analyzed, aimed at improving the surface properties of the fillers and the technological properties of the polymer matrix during their interaction. It is noted that the improvement of the interfacial interaction of the components of polymer reactoplastic composites, including adhesive strength, is a key factor for improving the reliability of the cured filled composite. As a promising area of research, a modification of the surface of the reinforcing fibrous filler and the technological characteristics of the liquid polymer binder, aimed at increasing their contact properties in the composite, was chosen. The effectiveness of the physical method of modifying the components of composites in the form of low-frequency ultrasonic processing is described. The peculiarities of cluster formation and physicochemical modification of epoxy polymers filled with dispersed fillers are analyzed. Attention is focused on the effectiveness of ultrasonic processing in the cavitation mode for deagglomeration and uniform distribution of nanoparticles in a liquid medium during the creation of nanocomposites. Experimentally confirmed is the improvement of the technological properties of liquid epoxy polymers, modified by ultrasound, used for the impregnation of oriented fibrous fillers, as well as the improvement of the physicomechanical properties of the sonicated epoxy matrices. Some issues of biological modifications of components of polymers for functional application are briefly reviewed.

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“…The physical and chemical properties of the polymer surfaces can be modified by the mentioned methodology for intimate interfacial contacts between two different phases, while these modifications have no effect on the properties of the bulk. These surface treatments show significant efficiencies such as (I) alteration of the chemical structure of polymer surfaces by free-radical reactions of the polymer surface with the surrounding gases, (II) etching of a microscopic layer or selective leaching of polymeric chains with low molecular weight, (III) polymer reinforcement by increasing the cross-links or branching of the polymer molecules, and (IV) cleaning by converting liquid or solid films/contaminants into volatile gas products [10,11].…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Polymers and Nanomaterials for Biomedical Applications: Antimicrobial Platforms and Drug Carriers

et al. 2020

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The use of polymers and nanomaterials has vastly grown for industrial and biomedical sectors during last years. Before any designation or selection of polymers and their nanocomposites, it is vital to recognize the targeted applications which require these platforms to be modified. Surface functionalization to introduce the desired type and quantity of reactive functional groups to target a cell or tissue in human body is a pivotal approach to improve the physicochemical and biological properties of these materials. Herein, advances in the functionalized polymer and nanomaterials surfaces are highlighted along with their applications in biomedical fields, e.g., antimicrobial therapy and drug delivery.

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Surface Modification to Improve Properties of Materials

Cited by 138 publications

References 46 publications

Plasma Activation of Polyethylene Powder

Plasma Activation of Polyethylene Powder

Use of Physicochemical Modification Methods for Producing Traditional and Nanomodified Polymeric Composites with Improved Operational Properties

Functionalization of Polymers and Nanomaterials for Biomedical Applications: Antimicrobial Platforms and Drug Carriers

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