scholarly journals Multifunctional Membranes—A Versatile Approach for Emerging Pollutants Removal

Membranes ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 67
Author(s):  
Ecaterina Matei ◽  
Cristina Ileana Covaliu-Mierla ◽  
Anca Andreea Ţurcanu ◽  
Maria Râpă ◽  
Andra Mihaela Predescu ◽  
...  
Keyword(s):  
Emerging Pollutants ◽  
Polymer Materials ◽  
Coupled Processes ◽  
Separation Processes ◽  
Photo Catalysis ◽  
Electrospun Membranes ◽  
Pollutants Removal ◽  
Materials Used ◽  
Thin Film Composites ◽  
Film Composites

This paper presents a comprehensive literature review surveying the most important polymer materials used for electrospinning processes and applied as membranes for the removal of emerging pollutants. Two types of processes integrate these membrane types: separation processes, where electrospun polymers act as a support for thin film composites (TFC), and adsorption as single or coupled processes (photo-catalysis, advanced oxidation, electrochemical), where a functionalization step is essential for the electrospun polymer to improve its properties. Emerging pollutants (EPs) released in the environment can be efficiently removed from water systems using electrospun membranes. The relevant results regarding removal efficiency, adsorption capacity, and the size and porosity of the membranes and fibers used for different EPs are described in detail.

Structure-property relationships of PE/PP sandwiched films

1987 ◽  
Vol 45 ◽  
pp. 454-455
Author(s):  
J. Petermann ◽  
G. Broza ◽  
U. Rieck ◽  
A. Jaballah ◽  
A. Kawaguchi
Keyword(s):  
Mechanical Tests ◽  
Polymer Materials ◽  
Ionic Crystals ◽  
Structure Property ◽  
Polymer Systems ◽  
Structure Property Relationships ◽  
Oriented Films ◽  
Materials Used ◽  
Polymer Laminates ◽  
Heated Glass

Oriented overgrowth of polymer materials onto ionic crystals is well known and recently it was demonstrated that this epitaxial crystallisation can also occur in polymer/polymer systems, under certain conditions. The morphologies and the resulting physical properties of such systems will be presented, especially the influence of epitaxial interfaces on the adhesion of polymer laminates and the mechanical properties of epitaxially crystallized sandwiched layers.Materials used were polyethylene, PE, Lupolen 6021 DX (HDPE) and 1810 D (LDPE) from BASF AG; polypropylene, PP, (PPN) provided by Höchst AG and polybutene-1, PB-1, Vestolen BT from Chemische Werke Hüls. Thin oriented films were prepared according to the method of Petermann and Gohil, by winding up two different polymer films from two separately heated glass-plates simultaneously with the help of a motor driven cylinder. One double layer was used for TEM investigations, while about 1000 sandwiched layers were taken for mechanical tests.

Development of Nanomaterials as Photo Catalysts for Environmental Applications

2020 ◽  
Vol 09 ◽  
Author(s):  
Ahmed M. Abu-Dief ◽  
W. S. Mohamed
Keyword(s):  
Water Purification ◽  
Smart Materials ◽  
Block Size ◽  
Industrial Applications ◽  
Vital Role ◽  
High Catalytic Activity ◽  
Chemical Contaminants ◽  
Environmental Threats ◽  
Photo Catalysis ◽  
Materials Used

Abstract:: Sustainability environmental lack is a growing and pivotal mater due to the issues: such as disturbances associated with biodiversity pollution, and climate change. Pollutants are the major cause of these environmental threats in the atmosphere. In recently, the nano-based photocatalyst is at the forefront of the author's interest because of its promising potential as a green chemical-based compound, high catalytic activity, the suitable and controllable surface area for wastewater treatment. Semiconductor materials in nanosized scale have electronic and optical properties depend on its building block size, which plays a vital role in developing smart materials that are well efficient for simultaneously destroying harmful chemical contaminants from our environment. This makes these materials used in many possible industrial applications such as water purification. In this Review, we report the most significant results contributing to progress in the area of environmental hazardous pollutant detection and removal focused on water purification especially through photo-catalysis to give readers an overview of the present research trends. Moreover, we analyze previous studies to indicate key principles of photo-catalysis and provide guidelines that can be used to fabricate more efficient photocatalysts.

scholarly journals Effect of Salinity on UVA-Vis Light Driven Photo-Fenton Process at Acidic and Circumneutral pH

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1315
Author(s):  
Iván Vallés ◽  
Lucas Santos-Juanes ◽  
Ana M. Amat ◽  
Javier Moreno-Andrés ◽  
Antonio Arques
Keyword(s):  
Hydroxyl Radicals ◽  
Acidic Medium ◽  
Emerging Pollutants ◽  
Clofibric Acid ◽  
Fenton Process ◽  
Simulated Sunlight ◽  
Scavenging Effect ◽  
Aqueous Matrices ◽  
Ph Dependent ◽  
Pollutants Removal

In the present work, the treatment of a mixture of six emerging pollutants (acetamiprid, acetaminophen, caffeine, amoxicillin, clofibric acid and carbamazepine) by means of photo-Fenton process has been studied, using simulated sunlight as an irradiation source. Removal of these pollutants has been investigated in three different aqueous matrices distinguished by the amount of chlorides (distilled water, 1 g L−1 of NaCl and 30 g L−1 of NaCl) at a pH of 2.8 and 5.0. Interestingly, the presence of 1 g L−1 was able to slightly accelerate the pollutants removal at pH = 5, although the reverse was true at pH = 2.8. This is attributed to the pH-dependent interference of chlorides on photo-Fenton process, that is more acute in an acidic medium. As a matter of fact, the fastest reaction was obtained at pH = 3.5, in agreement with literature results. Monitoring of hydrogen peroxide consumption and iron in solution indicates that interference with chlorides is due to changes in the interaction between iron and the peroxide, rather than a scavenging effect of chloride for hydroxyl radicals. Experiments were also carried out with real seawater and showed higher inhibition than in the NaCl experiments, probably due to the effect of different dissolved salts present in natural water.

Biomass-Derived Humin-like Furanic Polymers as an Effective UV-Shielding Agent for Optically Transparent Thin-Film Composites

2021 ◽  
Author(s):  
Rajathsing Kalusulingam ◽  
Sampath Gajula ◽  
Paulmanickam Koilraj ◽  
Duraikkannu Shanthana Lakshmi ◽  
Rajesh J. Tayade ◽  
...  
Keyword(s):  
Thin Film ◽  
Uv Shielding ◽  
Optically Transparent ◽  
Thin Film Composites ◽  
Film Composites

Meshing Model in Gear with Timing Belt

2011 ◽  
Vol 189-193 ◽  
pp. 4356-4360 ◽  
Author(s):  
E.G. Domek
Keyword(s):  
Polymer Materials ◽  
Timing Belt ◽  
Materials Used

The work treats about problem of designing of gear with timing belt depending on expected character of exploitation. The work presents constructional features of transmission timing belts depending on materials used for their production. Design of composites and usage of new polymer materials allows for improvement of constructional properties of belts.

Giant magnetoelectric effect at low frequencies in polymer-based thin film composites

2014 ◽  
Vol 104 (2) ◽  
pp. 022904 ◽  
Author(s):  
A. Kulkarni ◽  
K. Meurisch ◽  
I. Teliban ◽  
R. Jahns ◽  
T. Strunskus ◽  
...  
Keyword(s):  
Thin Film ◽  
Magnetoelectric Effect ◽  
Low Frequencies ◽  
Thin Film Composites ◽  
Film Composites

Solid-State Reactions in Multilayer Ni/Ti Thin Film Composites

1990 ◽  
Vol 205 ◽  
Author(s):  
Gillian E. Winters ◽  
K.M. Unruh ◽  
C.P. Swann ◽  
M.E. Patt ◽  
B.E. White ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reactions ◽  
Metastable Solid Solution ◽  
State Transformation ◽  
Solid State Transformation ◽  
Scanning Calorimetry ◽  
The Individual ◽  
Thin Film Composites ◽  
Film Composites ◽  
Rf Sputter Deposition

AbstractMultilayer films, consisting of alternating layers of crystalline Ni and Ti, have been prepared by RF sputter deposition over a range of modulation wavelengths corresponding to an overall composition of Ni50Ti50. These films have been characterized by xray diffraction and Rutherford backscattering measurements. The solid-state transformation by interdiffusional mixing of the individual layers has been directly studied by differential scanning calorimetry and correlated with structural measurements. These measurements indicate that the solid-state reaction of Ni and Ti multilayers proceeds through the formation of a metastable solid solution of Ti in Ni followed by the formation of intermetallic equilibrium compounds. No direct calorimetric or structural evidence for the formation of an amorphous Ni-Ti phase has been found in these samples.

Polyamide/polyacrylonitrile thin film composites as forward osmosis membranes

2016 ◽  
Vol 133 (42) ◽  
Author(s):  
Parisa Hajighahremanzadeh ◽  
Mahsa Abbaszadeh ◽  
Seyyed Abbas Mousavi ◽  
Mohammad Soltanieh ◽  
Hadi Bakhshi
Keyword(s):  
Thin Film ◽  
Forward Osmosis ◽  
Thin Film Composites ◽  
Film Composites

scholarly journals Thermoset Polymer Splicing Study Using a variation of welding

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Adi Prastyo Utomo ◽  
Prantasi Harmi Tjahjanti
Keyword(s):  
Hardness Test ◽  
Test Sample ◽  
Test Method ◽  
Polymer Materials ◽  
Hardness Testing ◽  
Hot Gas ◽  
Thermoset Polymer ◽  
Materials Used ◽  
Thickness Variations ◽  
Plastic Welding

There is not much plastic welding currently done and not much research has been done on plastic welding. The purpose of this study was to study the use of welding variations used to join the thermoset polymer material. The thermoset polymer materials used are acrylic, melamine and bakelit with the test sample measuring 80mm in length, 30mm in width and 3mm in thickness. Variations in welding are used using hot gas welding, electric soldering and gas torches. The test method is carried out after welding to determine the porosity of the weld using a penetrant liquid. Hardness testing was also carried out. The best welding results are shown on acrylic material using electric solder, showing that the amount of porosity is the least, and has the highest hardness test.

Sign in / Sign up

Export Citation Format

Share Document