Alireza Ashori

Alireza Ashori
Iranian Research Organization for Science and Technology | IROST · Chemical Technologies

Ph.D

About

162
Publications
188,412
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
8,079
Citations
Additional affiliations
September 2011 - July 2015
Iranian Research Organization for Science and Technology
Position
  • Professor (Associate)
April 2004 - October 2011
Iranian Research Organization for Science and Technology
Position
  • Professor (Assistant)
October 1996 - August 2000
Iranian Research Organization for Science and Technology
Position
  • Lecturer
Education
September 2000 - April 2004
Universiti Putra Malaysia
Field of study
  • Biocomposite Technology
November 1993 - June 1996
Gorgan University of Agricultural Sciences and Natural Resources
Field of study
  • Wood and Paper Science and Technology
October 1986 - July 1990
Gorgan University of Agricultural Sciences and Natural Resources
Field of study
  • Wood and Paper Science and Technology

Publications

Publications (162)
Article
Full-text available
The current study proposes a novel and improved cigarette filtration design comprising cellulose nanofibers (CNFs) and powdered activated carbons (PACs) with different dry matter contents. The proposed filter samples were primarily analyzed to verify their applicability as cigarette filters via measurements and standard tests, such as SEM, BET, DSC...
Article
Full-text available
This study aims to make environment-friendly plywood panels acceptable in terms of both mechanical and physical properties using chitosan as a natural binder. Five-layer poplar plywood specimens were prepared with two different commercial adhesives, namely urea-formaldehyde (UF) and methylene diphenyl isocyanate (MDI), and compared with chitosan (C...
Preprint
Full-text available
The current study proposed a novel and improved cigarette filtration design comprising cellulose nanofibers (CNF) and powdered activated carbons (PAC) with different dry matter contents. The proposed filter samples were primarily analyzed to verify their applicability as a cigarette filter via several measurements and standard tests, such as SEM, B...
Preprint
The goal of this study is to make green wood products that are acceptable both in terms of mechanical and physical properties using chitosan as a natural binder. Five-layer poplar plywood specimens prepared with two different commercial adhesives namely urea formaldehyde (UF) and methylene diphenyl isocyanate (MDI), and compared with chitosan (CH)....
Article
Full-text available
The aim of this research was to fabricate a burn dressing in the form of hydrogel films constructed with cellulose nanofibers (CNF) that has pain-relieving properties, in addition to wound healing. In this study, the hydrogels were prepared in the form of film. For this, CNF at weight ratios of 1, 2, and 3 wt.%, 1 wt.% of hydroxyethyl cellulose (HE...
Article
Full-text available
Nanofilters made with high adsorption freeze-dried modified cellulose nanofiber (CNF) aerogel were produced. The modification was made using functional groups containing phthalimide, and then their ability to adsorb particulate matter (PM) was evaluated and compared with the control filter (HEPA). The results showed that the highest adsorption of P...
Conference Paper
The increasing CO2 concentration in the atmosphere has been identified as a major cause of global warming. Cellulose nanofibers (CNFs) has recently gained huge attraction due to their unique characteristics including, high specific surface area, high aspect ratio, biodegradability, large availability and a lot of hydroxyl groups at the surface whic...
Article
The effect of two types of nanocellulose on the mechanical properties of chitosan (CH) film was examined in terms of elongation, tensile strength, and dynamic-mechanical properties such as tan δ and storage modulus. Chitosan films were reinforced by cellulose nanocrystal (CNC) and cellulose nanofiber (CNF) with different ratios. CH/CNC and CH/CNF n...
Article
One of the most important environmental issues in the world today is the problem of air pollution, which includes particulate matter (PM) and greenhouse gases (mainly CO2). The production of efficient sustainable filters to overcome this concern as well as to provide an alternative to synthetic petroleum-based filters remains a demanding challenge....
Article
Chitosan, a well-known biopolymer due to its unique properties, has received considerable attention as a result of the amine group activity that locates on the backbone of chitosan. To improve the mechanical and antibacterial characteristics of chitosan, various modifications have been used. Amino acids, the monomeric units of proteins, among all o...
Article
Pollution from particulate matter (PM) is going to be one of the important threats to human and environmental health in the world. Today, synthetic polymers based on petroleum and chemicals are used in the manufacturing industrial air filters, which are not environmentally friendly due to secondary pollution. Using sustainable biomaterial in fabric...
Article
The purpose of this study was to fabricate nano filters to adsorb particulate matter less than 2.5 μm using phthalimide modified cellulose nanofibers. Modification of cellulose nanoparticles with phthalimide was performed on acetic acid with a ratio of cellulose to phthalimide nanofibers 1:0, 1:0.5, 1:1 and 1:1.5 wt%. Modified cellulose nanofibers...
Article
A novel process of using phthalimide to modify cellulose nanofibers (CNF) for CO2 adsorption was studied. The effectiveness of the modification was confirmed by ATR-IR. Phthalimide incorporation onto CNF was confirmed with the characteristic peaks of NH2, C-N, and ester bonding COO- was observable. The XPS analyses confirmed the presence of N1s pea...
Article
In this research, biocomposite films containing chitosan (CS), polyvinyl alcohol (PVA) and polyvinyl pyrrolidone (PVP), with different ratios, have been provided. The effects of adding hexamethylene 1, 6-di(aminocarboxysulfonate) (HMDACS) as cross-linking agent and the formation of urethane linkage on mechanical properties such as tensile strength,...
Article
This article presents the preparation and characterization of polyhydroxybutyrate-co-valerate (PHBV) nanocomposite films containing cellulose nanocrystals (CNC) and aluminum oxide nanoparticles (Al2O3) as reinforcements. The effects of adding nanoparticles on the mechanical properties, such as tensile strength and elongation, were studied using dyn...
Article
The aim of this study was to develop a novel nanocomposite membranes based on polyethersulfone (PES) and modified cellulose nanocrystals (CNCs) for removal of impurities from wastewater of licorice processing. The surface modification of CNCs was conducted by using (3-aminopropyl) triethoxysilane (APTES) to produce nanocomposite membrane with high...
Article
Full-text available
This paper presents an experimental study of using graphene oxide (GO) and modified GO to improve the interlaminar fracture and thermo-mechanical properties of glass fiber/epoxy composites. First, GO nanoplatelets were synthesized and then chemically modified using dodecylamin (DA-GO) and 1-(3-aminopropyl) imidazole (IL-GO) to improve their dispers...
Article
Full-text available
Date palm (phoenix dactylifera), which is mostly found in the middle east countries such as Iran, Iraq, Saudi Arabia, and the United States (California) that play a significant role in the economical and the environmental condition in those areas. The main purpose of planting dates is its fruit, which is consumed as fresh, dried or processed forms....
Article
The applications of renewable nanomaterial’s, such as cellulose nanofibers (CNFs), have recently been of great interest due to their unique properties, including high surface area, high aspect ratio, biodegradable, easy access and reactive hydroxyl groups on the surface. The purpose of this study was to fabricate refined air nano filters using pht...
Article
In this study, effects of cellulose nanocrystals (CNCs) as variable nano additive on the morphology and performance of polyethersulfone (PES) membranes were investigated. PES/CNC nanocomposite membranes were prepared using electrospinning technique. Various contents (0.1, 0.5, and 1.0 wt%) of the CNCs were employed to prepare PES/CNC membranes. The...
Article
The present work reports the effect of cellulose nanofibers (CNFs) on the thermal, dynamic mechanical analysis (DMA), density and water uptake of thermoplastic starch (TPS) foamed composites. The obtained thermal and DMA results illustrate that thermal stability, storage modulus (E′), loss modulus (E″) and damping factor (tan δ) increase for all TP...
Article
This research was aimed at studying the preparation of thermoplastic starch (TPS) from cornstarch flour using twin screw extrusion. Also, the effects of the addition of cellulose nanofibers (CNFs) as reinforcement, on TPS nanocomposite films properties were evaluated. Nanocomposites with 0.5, 1.0 and 1.5 wt% of CNFs content were prepared. The chemi...
Chapter
Full-text available
Fiber plastic composite (FPC) is a very promising and sustainable green material to achieve durability without using toxic chemicals. The term FPCs refers to any composites that contain plant fiber and thermosets or thermoplastics. Plant fibers are interesting reinforcement, due to their specific properties such as low density, high strength, and n...
Article
Glass fiber (GF)/epoxy (EP) matrix composites containing graphene oxide (GO) nanoplatelets were manufactured for improving the mechanical properties. GO nanoplatelets were functionalized using dodecylamin (DA) and 1-(3-aminopropyl) imidazole (IL) to improve their dispersion in the matrix and to reinforce EP adhesive. The structural properties of GO...
Article
In this study, two types of new bioadhesives formulated from abundant and renewable soybean flour (SF), acetylated soybean flour based adhesive (ASF), and soybean flour-based adhesive, were modified with acetylated cellulose nanocrystal (ACNC). The apparent viscosity and morphology of the adhesive formulations were characterized. The chemical compo...
Article
The main goal of this work was to reinforce softwood pulp (SP) with bacterial cellulose (BC) to generate a sustainable biocomposite. BC is a nanocellulose, which was anticipated to increase interfacial adhesion between the cellulosic fibers and BC. The organism used was Gluconacetobacter xylinus, which was incubated in a static Hestrin-Schramm cult...
Article
The main goal of this study was to determine the performance of particleboards made from date palm branches (DPB, Phoenix dactylifera), as a low-value raw material and expanded vermiculite (VER), as a natural inorganic filler. DPB is underutilized abundant byproduct in southern parts of Iran. For the purpose of evaluation, compositions of DPB and V...
Article
This paper presents the acoustical performance of plywood/waste tire rubber (PWTR) composite panels. Beech (Fagus orientalis) and alder (Alnus glutinosa) veneers having 1.8 mm thickness were used in the preparation of panels. The wood layers were bonded using commercial urea–formaldehyde (UF) resin, and methylene diphenyl diisocyanate (MDI) was use...
Article
Graphene oxide (GO) was functionalized using three different diamines, namely ethylenediamine (EDA), 4,4′-diaminodiphenyl sulfone (DDS) and p-phenylenediamine (PPD) to reinforce an epoxy/glass fiber (EP/GF) composite laminate, with the aim of improving the overall composite mechanical performance. Different mechanical characterization techniques we...
Chapter
In the past decades, Greenpeace groups in various countries have increasingly addressed the environmental impact of chemical substances, fully recognized as a global issue. This awareness is pushing governments toward more stringent legislation, which promotes the preservation and protection of the quality of the environment for future generations....
Article
This paper investigated the reinforcing effects of a hybrid filler, including talc and exfoliated graphene nanoplatelets (xGnPs), in polypropylene (PP) composites. In order to increase the interphase adhesion, maleic anhydride grafted polypropylene (MAPP) was added as a compatibilizing agent to the PP/talc/xGnP composites. The experiments were desi...
Article
This work reports an improvement in the mechanical and thermo-mechanical properties of short carbon fiber (SCF)/polypropylene (PP) composite, resulting from coating of the SCFs with exfoliated graphene nanoplatelets (xGnPs). At first, the xGnPs were coated on the SCFs surface by facile physical absorption method, and then the composites were manufa...
Article
Full-text available
This article reports on the use of carbon fiber (CF) and waste rubber (WR) as reinforcing agents for plywood. The aim of this study was to determine the effects of three variable parameters: CF content, WR content, and CF length, on the mechanical and physical properties of the plywood. The properties evaluated were mechanical properties in terms o...
Article
Biopolymer nanocomposite films were prepared by adding graphene oxide (GO) and reduced GO (RGO) to sodium carboxymethyl cellulose (CMC)/silk fibroin (SF) matrix. GO and RGO nanoparticles were prepared by a top-down method from graphite powder. This method consists of graphite oxidation followed by sonication, producing GO nanosheets. Then, RGO nano...
Article
In this study, the reinforcing mechanism of amine functionalized on carbon fibers (CFs) has been precisely discussed, and the differences between aliphatic and aromatic compounds have been illustrated. Polyacrylonitrile-based CFs were functionalized with ethylenediamine, 4,4-diaminodiphenyl sulphone, and p-aminobenzoic acid (PAB), and CF-reinforced...
Chapter
Full-text available
Since the past two decades, the thermoplastic industry has been attempting to decrease the dependence on petroleum-based fuels and products due to the increased environmental consciousness. This leads to the need to investigate environmentally friendly, sustainable materials to replace existing ones. Currently, the most viable method of dealing wit...
Article
Full-text available
In this work, the effects of extractives removal on the performance of used varnishes were studied. The experimental samples were prepared using defect-free alder (Subcordate alnus) and ironwood (Zelkova carpinifolia) with moisture content of 12% and were coated with polyester and two-part polyurethane (urethane alkyd) varnishes. Removal of extract...
Article
Full-text available
The aim of this work was to investigate the prediction of the elastic constants of carbon fibre-reinforced epoxy laminated composites using a simple mathematical approach. For this purpose, a Matlab Calculation Code (MCC) has been developed in MATLAB, which provides sufficient capabilities for analysis of the mechanical behaviour of composite mater...
Article
In the present study, a graphene oxide/chitosan/FeOOH (GO/Ch/FeOOH) nanostructured composite was prepared and used as an adsorbent for the removal of Pb(II) ions from aqueous solution. The nanocomposite was characterized by FT-IR, XRD, and SEM techniques. Several important parameters influencing the adsorption of Pb(II) ions such as pH (3-7), tempe...
Article
The aim of this study was to investigate the suitability of sorghum (Sorghum bicolor) stalk (SS) as a promising raw material for particleboard manufacturing. The SS particles and industrial hardwood particles in various proportions were used as the raw materials for the surface and core layers of the three-layer particleboards. Commercial urea form...
Article
This work has focused on developing cellulose nanofibers (CNFs)/polylactic acid (PLA) coated with ethanolic extract of propolis (EEP). First, the chemical composition of EEP was studied in order to determine the major compounds. Composites were then prepared using solvent casting method, with the goal of making green composites. The effectiveness o...
Article
Full-text available
The aim of this work was to use waste tire rubber (WTR) in the middle layer of hybrid plywood materials. The effects of four variable parameters, namely, WTR contents (430 and 720 g), resin contents (120 and 160 g/m2), hot pressing (single-stage and two-stage), and arrangements of veneer layers on the mechanical, physical, and acoustical properties...
Article
This paper presents the effects of multi-walled carbon nanotube (MWCNT) as reinforcing agent on some properties of natural fiber/polypropylene composites. In the sample preparation, MWCNT contents and fiber types (bagasse stalk and poplar) were used as variable parameters. The composites with different MWCNT contents were fabricated by melt compoun...
Article
In this work, hybrid composite materials were made from the combination of waste silk fibers (WSFs) and poplar wood flour (PWF) as reinforcement, recycled polycarbonate (RPC) as polymer matrix, and silane as coupling agent. RPC was obtained from waste compact discs. The effects of fiber type and loading on the mechanical and physical properties of...
Article
Full-text available
Rice stalk fiber and rice husk ash are agricultural by-products, which are available worldwide in large quantities. There is, however, no information about suitability of the rice stalk fiber and rice husk ash combination for the production of fiber-cement composites in the open literature. This paper presents a parametric experimental study, which...
Article
Full-text available
Multi-axial multi-ply fabric (MMF) composites are becoming increasingly popular as reinforcing materials in high- performance composites due to their high mechanical prop- erties. This work aimed to study the effects of three variable parameters including fiber contents, numbers of plies, and layer orientations on the mechanical properties of MMF c...
Article
The objective of this study was to prepare chitosan and starch composite films by the addition of 0–3 wt% graphene nanosheets. The film's tensile strength (TS), tensile modulus (TM), elongation at break (E), moisture uptake (Mu), and water vapor transmission rate (WVTR) were investigated. The surface morphology of the composite films was studied us...
Article
In this work, monoethanolamine (MEA), an organosolv material, was used as an environmentally friendly process for kenaf whole-stem pulping. The pulping trials were carried out using MEA and MEA-anthraquinone (MEA-AQ) methods and the soda-AQ process as reference. The operating conditions such as the composition of the cooking liquor, the maximum coo...
Article
The aim of this study was to evaluate the influence of mild alkaline pre-extraction on the hemicelluloses removal of rice straw. In addition, the performance of cellulose nanofibers (CNFs) addition on some physico-mechanical properties obtained from extracted and un-extracted (control) samples were investigated. An optimum compromise was found as o...
Article
Full-text available
In this study, the effects of two variable parameters namely nanoclay and coupling agent on the durability against fungal attack and water absorption of wood plastic composites (WPCs) were investigated. Composites based on high density polyethylene (HDPE), sanding dusts (SDs), and nanoclay (montmorillonite type) were made by melt compounding and th...
Article
Full-text available
The objective of this research work was to gain a better understanding of the mechanical properties of epoxy resin composites reinforced with carbon fiber. For this purpose, the effects of fiber orientations, resin types, and number of laminates on mechanical properties of laminated composites have been investigated. In the sample preparation, comp...
Article
Full-text available
Biodegradable blend films from chitosan-tapioca starch were prepared by the casting method. To improve the properties of chitosan–starch blend films, nano graphene was used. The influences of the loading of graphene on the physico-mechanical properties in terms of water vapor transmission rate (WVTR), thermal stability, and tensile strength of the...
Article
Full-text available
This study was aimed at identifying the best approach of incorporating nano-graphene (NG) into bagasse/polypropylene composites to enhance their mechanical and physical properties. The composites with different NG contents were produced by melt compounding in a twin-screw extruder and then by injection molding. The mass ratio of the bagasse flour (...
Article
This work presents a parametric experimental study, which investigates the effects of partial replacement of Portland cement by wood fiber waste (WFW), rice husk ash (RHA), and limestone powder waste (LPW) for producing a lightweight concrete block as a building material. Some of the mechanical and physical properties of block materials having vari...
Article
Full-text available
This article presents the application of agro-waste materials (i.e., bagasse and corn stalk fibers) along with E-glass fiber in order to evaluate and compare their suitability as reinforcement for thermoplastic composites. The hybrid effect of glass and cellulosic fibers on the tensile, flexural, and impact properties of the composites were investi...
Article
Soybean stalk (SS), as a low-cost absorbent, has been used in this study to remove Remazol Black B (RBB) and Acid Orange 7 (AO7) dyes from aqueous solutions. The effects of operational parameters on the efficiency of dye removal, including solution pH, contact time, and initial dye concentration, have been investigated. All sets of experiments were...
Article
Full-text available
In this work, the influence of four variable parameters including fiber types (poplar and rice straw), fiber contents (45, 60, and 75 wt%), fiber sizes (20–40 and 40–60 mesh), and blending methods (hot-pressing and extrusion) on the physico-mechanical properties of wood plastic composite panels were studied. Generally, the results showed that each...
Article
Full-text available
In this research, the reinforcing effect of fillers including canola stalk, paulownia and nanoclay, in polypropylene (PP) has been investigated. In the sample preparation, 50 wt% of lignocellulosic materials and 0, 3, and 5 wt% of nanoclay particles were used. The results showed that while flexural and tensile properties were moderately enhanced by...