Emir Erisir

@subu.edu.tr

Material and Material Processing Technologies / Paper Technology
Sakarya University of Applied Sciences

Emir Erisir


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https://researchid.co/emirerisir

RESEARCH, TEACHING, or OTHER INTERESTS

Forestry, Materials Science, Chemical Engineering, Multidisciplinary
13

Scopus Publications

287

Scholar Citations

8

Scholar h-index

6

Scholar i10-index

Scopus Publications

  • The Effect of Gum Arabic Addition on Lignosulfonate/ Polyvinyl Alcohol Composite Films
    Emir Erişir
    Bioresources, 2026
    The effectiveness of Gum Arabic (GA) as a compatibilizer was evaluated in sodium lignosulfonate (LS)/polyvinyl alcohol (PVOH) composite film systems. This study aimed to improve the morphological integrity and mechanical stability of films, while achieving sustainability objectives. The goal was to obtain mechanically reinforced and morphologically homogeneous biodegradable films through GA-assisted phase stabilization. The structural, morphological, and mechanical properties, as well as the water interaction performance, of films were investigated. Fourier transform infrared analysis showed that the band intensity attributed to hydrogen bonding increased with the addition of GA, indicating enhanced molecular interactions. Scanning electron microscopy revealed that GA increased morphological defects such as microphase separation and aggregation, especially at low concentrations. While 25% GA helped fill the pores, it did not completely eliminate structural defects. Mechanical tests showed a decrease in tensile strength of up to 63% associated with such defects. Water sorption and dissolution tests showed that mass loss in aqueous media reached 75% due to the solubility of LS and GA. However, higher GA content moderately reduced this loss by minimizing defect sites. GA failed to act as a compatibilizer under tested formulation and processing parameters but contributed to the film’s surface homogeneity as a physical filler.
  • The Effects of Pre-evaporation Time on the Structure and Performance of Na-Lignosulfonate/PVA Composite Films
    Emir Erişir
    Sakarya University Journal of Science, 2025
    Lignin, an abundant renewable biopolymer in nature, contains specific structural limitations affecting its application strategies. So, a favoured strategy is to use it into the manufacturing of composite materials with other natural or synthetic polymers. This study examines the impact of controlled accelerated solvent removal (pre-evaporation), a subject that is still not thoroughly explored, on the structural, morphological, and thermal characteristics of Na-lignosulfonate (LS) and polyvinyl alcohol (PVA) composite films. Aqueous solutions containing LS, PVA, glycerol and urea were formulated for the casting of composite films. A pre-evaporation at 85-90 °C for 0 to 240 min was employed to solution enhancing its concentration prior to being poured into moulds. The 13C-NMR and FTIR used for structural characterisation validated the specific aromatic and aliphatic structure of LS. FTIR analysis identified interactions between LS and PVA in the films, indicating changes in the ether bond peaks (~1039 cm⁻¹). TGA demonstrated that LS enhanced the thermal stability of the composites and facilitated carbonisation above 450°C. Examination by SEM of the composite films indicated that the pre-evaporation duration significantly affected the morphology. A 5–14% decrease in film thickness and an increase in pore size and number, particularly on the exposed surface, were observed, but the change did not occur uniformly. LS/PVA films were effectively produced without internal stress during pre-evaporation durations of up to 150 min. At times exceeding 150 min, excessive solvent loss and increased solution viscosity resulted in significant morphological defects such as internal stresses, large pores, and structural integrity failure, leading film casting impossible at 240 min. The study determined that the 150 min pre-evaporation procedure is an essential limit for the production of composite films from these polymers. The results obtained are crucial for improving the processing parameters of lignin-based composites intended for packaging or carbon precursor applications.
  • Swelling Capacity in Carboxymethylcellulose – Cellulose Hybrid Hydrogels: The Effects Of Oxidation with Zinc Chloride and Refining on Cellulose Used as Reinforcement
    Asena Damla BÜYÜKÜSTÜN, Emir Erişir, Esat GÜMÜŞKAYA
    Drewno, 2025
    The focus of the study was to address the issue of hydrogels based on carboxymethyl cellulose having poor gelation strengths when in contact with liquids. In order to enhance this characteristic, cellulose was added to the hydrogels, and their characteristics were examined. Unlike previous studies, cellulose was modified mechanically and chemically before its addition. The pulp was refined using a traditional PFI mill or a supermasscolloider as part of the mechanical modification process. The combination of H2O2 and ZnCl2 was also chosen for chemical modification of the pulp due to their synergistic effect, where ZnCl2 facilitates fiber swelling, and H2O2 enhances Zn²⁺ ions' reactivity, further promoting cellulose oxidation. By creating a cellulosic backbone with higher resistance properties, it is intended to prevent the cellulose-carboxymethyl cellulose complex from dispersing in water. Epichlorohydrin was utilized in different ratios to crosslink modified cellulose and carboxymethyl cellulose in the hydrogel-making process. Fourier transform infrared spectroscopy, Differential scanning calorimetry, and Scanning electron microscopy were used to examine the hydrogels' structural, thermal, and surface characteristics. The results showed that with the modified cellulose addition, the loss of swelling and water absorption properties of the hydrogel due to the increase in cellulose content can be minimized. The swelling capacity of the samples was significantly preserved by refining the cellulose using a PFI mill. However, refining using supermasscolloider did not give satisfactory results. In summary, the study showed that modified cellulose reinforcement may be used to produce hydrogels without significantly altering the swelling capacity of carboxymethyl cellulose-based hydrogels.
  • ENHANCED SELECTIVITY OF OXYGEN DELIGNIFICATION BY CHERRY AND GUAR GUM ADDITIVES
    , AYŞEGÜL İSKEFYELİ, HÜSEYİN KIRCI, , EVREN ERSOY KALYONCU, , EMİR ERİŞİR, and
    Cellulose Chemistry and Technology, 2024
    Natural polysaccharide-based gums produced by plants in response to biotic or abiotic factors are used in various industries due to their biodegradability, renewability, biocompatibility, and non-toxic properties. This study examined the use of these gums in a new application, such as adding them to the delignification liquor to decrease the negative effects of radicals formed during the oxygen delignification of stone pine kraft pulps. For this purpose, the effects of sweet cherry gum, both with and without hydrogen peroxide reinforcement, and guar gum on oxygen delignification were examined in this study. The addition of both gums, up to a certain usage level, increased the selectivity of the reaction and protected the viscosity from oxidative damage, while causing only a limited reduction in the kappa number during the delignification process. However, it was determined that cherry gum, in hydrogen peroxide-reinforced oxygen delignification, showed no effect on selectivity, but increased pulp strength properties and better bleached pulp could be produced.
  • Acetylation of cellulose in ethyl acetate: characterization and thin film applications
    Emir Erişir, Esat Gümüşkaya
    Journal of Wood Chemistry and Technology, 2024
    The study aims to explore the viability of ethyl acetate as a solvent for cellulose acetylation and assess the feasibility of producing films from the acetylated cellulose. Methodologically, the research focused on limited variations in reaction temperature and catalyst amount, specifically two temperatures and four catalyst quantities, while maintaining consistent quantities of EtoAc and acetic anhydride, reaction time, solution concentration, and other factors. The structure and properties of acetylated cellulose were investigated by titration (heterogeneous saponification), viscosity, chemical resistance (solubility), Fourier transform infrared (FT-IR), X-ray diffraction (XRD), proton nuclear magnetic resonance (1H-NMR) and differential scanning calorimetry (DSC). Surprisingly, efficient acetylation in ethyl acetate was achieved with a small catalyst quantity. As the catalyst amount increased, degree of substitution decreased from 2.32 to 0.76. Further investigation involved the production of thin acetate films using the casting method, and evaluating film properties such as ultraviolet (UV) light absorbance, water vapor permeability, tensile strength, and cross-sectional characteristics via scanning electron microscopy (SEM). The films exhibited impressive tensile strengths, reaching up to 76.98 MPa, and demonstrated exceptional transparency. The findings suggest that EtoAc is a suitable solvent for synthesizing cellulose acetate, and adjustments to reaction variables hold the potential to enhance product qualities.
  • CELLULOSIC SUPERABSORBENT PRODUCTION WITH CITRIC ACID CROSS-LINKING METHOD
    Sigma Journal of Engineering and Natural Sciences, 2020
  • THE EFFECTS of H2SO4 CATALYST RATIOS in PRODUCTION PROCESS on CELLULOSE ACETATE PROPERTIES
    Sigma Journal of Engineering and Natural Sciences, 2019
  • Longitudinal variation in selected wood properties of oriental beech and caucasian fir
    Elif Topaloglu, Emir Erisir
    Maderas Ciencia Y Tecnologia, 2018
    In this study, several wood properties were investigated along with the longitudinal direction for oriental beech and caucasian fir trees grown in Turkey. Wood density, compression strength parallel to grain, chemical characteristics (holocelluose, celluose, lignin), fiber dimensions (fiber length, fiber width, fiber lumen width, fiber cell wall thickness) were measured from the sapwood of the discs taken at the stem heights of 1.30, 6.30 and 12.30 meters. Both wood species showed clear trends in wood properties along longitudinal direction. For both wood species, the highest values in density, compression strength, volumetric shrinkage and swelling were at 1.30 m stem height, and the investigated paraeters decreased along with the stem height, while longitudinal shrinkage and swelling percentage increased. The highest cellulose content was found at 1.30 m stem height, and the highest lignin content was found at 12.30 m stem height for both wood species. The longest fibers and the thickest fiber walls were determined at 1.30 m stem height in both wood species. These results clearly indicated that stem height greatly affected the investigated wood properties for both wood species.
  • Predictive Models for Modulus of Rupture and Modulus of Elasticity of Particleboard Manufactured in Different Pressing Conditions
    Sebahattin Tiryaki, Uğur Aras, Hülya Kalaycıoğlu, Emir Erişir, Aytaç Aydın
    High Temperature Materials and Processes, 2017
    Determining the mechanical properties of particleboard has gained a great importance due to its increasing usage as a building material in recent years. This study aims to develop artificial neural network (ANN) and multiple linear regression (MLR) models for predicting modulus of rupture (MOR) and modulus of elasticity (MOE) of particleboard depending on different pressing temperature, pressing time, pressing pressure and resin type. Experimental results indicated that the increased pressing temperature, time and pressure in manufacturing process generally improved the mechanical properties of particleboard. It was also seen that ANN and MLR models were highly successful in predicting the MOR and MOE of particleboard under given conditions. On the other hand, a comparison between ANN and MLR revealed that the ANN was superior compared to the MLR in predicting the MOR and MOE. Finally, the findings of this study are expected to provide beneficial insights for practitioners to better understand usability of such composite materials for engineering applications and to better assess the effects of pressing conditions on the MOR and MOE of particleboard.
  • Comparison of reinforced oxygen delignification methods for old corrugated board (OCC) fibres
    Basri Oktay KOÇ, Esat GÜMÜŞKAYA, Emir ERİŞİR, Emrah PEŞMAN, Hüseyin KIRCI
    Drewno, 2017
    The present work focuses on the effects of sodium percarbonate and hydrogen peroxide as reinforcing agents for the oxygen delignification of old corrugated container paper (OCC). The chemical and crystalline structure, physical and mechanical properties and the optical properties were investigated in OCC papers delignified using reinforced oxygen delignification methods. The relative degradation rates were determined at 4.02% for oxygen delignification reinforced with sodium percarbonate and 0.62% for oxygen delignification reinforced with hydrogen peroxide at a 2% alkali charge. The results showed that paper sheet properties following oxygen delignification reinforced with hydrogen peroxide were better than for those following oxygen delignification reinforced with sodium percarbonate and pure sodium percarbonate. It was determined that the whiteness value was higher following oxygen delignification reinforced with sodium percarbonate rather than any of the other reinforcing agents, while the highest ISO brightness value was found following oxygen delignification reinforced with hydrogen peroxide.
  • Examination of the chemical changes in spruce wood degraded by brown-rot fungi using FT-IR and FT-Raman spectroscopy
    Sefa Durmaz, Özlem Özgenç, İsmail H. Boyacı, Ümit C. Yıldız, Emir Erişir
    Vibrational Spectroscopy, 2016
  • Alkaline sulphite anthraquinone pulping of caucasian spruce (picea orientalis l.) chips with added sodium borohydride and ethanol
    Emir Erişir, Esat Gümüşkaya, Hüseyin Kirci, Nuray Misir
    Drewno, 2015
  • The effect of sodium borohydride on alkaline sulfite-anthraquinone pulping of pine (Pinus pinea) wood
    Esat Gümüşkaya, Emir Erişir, Hüseyin Kirci, Nuray Misir
    Industrial and Engineering Chemistry Research, 2011

RECENT SCHOLAR PUBLICATIONS

  • The Effect of Gum Arabic Addition on Lignosulfonate/Polyvinyl Alcohol Composite Films
    E Erişir
    BioResources 21 (2), 3688-3717 , 2026
    2026
  • The Effects of Pre-evaporation Time on the Structure and Performance of Na-Lignosulfonate/PVA Composite Films
    E Erişir
    Sakarya University Journal of Science 29 (5), 580 - 591 , 2025
    2025
    Citations: 1
  • Functionalized Cellulose-Reinforced CMC-Based Hydrogels: NaOH-Urea Catalyzed Oxidation and Mechanical Pretreatments, Crosslinking with Citric Acid and Epichlorohydrin, and …
    AD Büyüküstün, E Gümüşkaya, E Erişir
    Artvin Çoruh Üniversitesi Orman Fakültesi Dergisi 26 (2), 290 - 301 , 2025
    2025
  • Assessment of Lignin in Hazelnut Shells: A Comparative Study With Various Lignocellulosic Biomass Sources
    E Erişir, S Gümüş
    12th International Palandöken Scientific Studies Congress-Erzurum, Türkiye , 2025
    2025
  • The Isolation Methods Of Lignin From Woody Biomass
    E Erişir
    17th International Istanbul Scientific Research Congress , 2025
    2025
  • CMC Esaslı Hidrojel Üretimi için Fenton ile Oksitlenmiş ve Mekanik Rafinasyona Uğratılmış Selüloz ile Sürdürülebilir Takviyesi
    EE Asena Damla Büyüküstün, Esat Gümüşkaya
    Bartın Orman Fakültesi Dergisi 27 (2), 337 - 352 , 2025
    2025
  • The Evaluation of Performance Properties of CMC-Based Copolymer Hydrogels Reinforced with Cellulosic Fibers Subjected to Stepwise Chemical and Mechanical Pretreatments …
    AD Büyüküstün, E Gümüşkaya, E Erişir
    Düzce Üniversitesi Orman Fakültesi Ormancılık Dergisi 21 (1), 172-192 , 2025
    2025
  • Swelling Capacity in Carboxymethylcellulose – Cellulose Hybrid Hydrogels: The Effects of Oxidation with Zinc Chloride and Refining on Cellulose Used as Reinforcement
    AD Büyüküstün, E Erişir, E Gümüşkaya
    Drewno. Prace naukowe. Doniesienia. Komunikaty 68 (215), 00046 , 2025
    2025
    Citations: 3
  • The Role of Enzymatic Treatments in Cellulose Modification
    E Erisir
    International Marmara Sciences Congress (IMASCON) 2024 - Autumn, 67 , 2024
    2024
  • Enhanced Selectivity of Oxygen Delignification by Cherry and Guar Gum Additives
    A İskefyeli, H Kırcı, E Ersoy Kalyoncu, E Erişir
    Cellulose Chemistry and Technology 58 (7-8), 747-757 , 2024
    2024
  • An Environmentally Friendly Solvent for Cellulose Acetate Production: Ethyl Lactate
    E Erişir, E Gümüşkaya
    Bartın Orman Fakültesi Dergisi 26 (3), 271 – 283 , 2024
    2024
    Citations: 1
  • Acetylation of cellulose in ethyl acetate: characterization and thin film applications
    E Erişir, E Gümüşkaya
    Journal of Wood Chemistry and Technology 44 (4), 228-243 , 2024
    2024
    Citations: 8
  • Investigation Of The Conversion Of Lignin Obtained From Woody Biomass Wastes Into Graphene With The Via Of Laser
    EC Doluel, M Yılmaz, E Erişir, S Gümüş
    International Marmara Sciences Congress (IMASCON) 2024 – Spring, 47 , 2024
    2024
  • The Structural And Thermal Characterisation Of Carboxymethyl Cellulose-Based Hydrogels Chemically Crosslinked With Epichlorohydrin: The Effects Of Modified Cellulose
    AD Büyüküstün, E Erişir, E Gümüşkaya
    International Marmara Sciences Congress (IMASCON) 2023 - Autumn, 42 , 2023
    2023
  • The Effects of Pretreatments Applied to Cellulose on Some Properties of Cellulose Reinforced CMC Hydrogels
    AD Büyüküstün, E Erişir, E Gümüşkaya, H Kırcı
    International Marmara Sciences Congress (IMASCON) 2023 - Spring, 26 , 2023
    2023
  • Potassium Carbonate as Catalyst for Transesterification of Cellulose in TBAF/DMSO Solvent System Instead of KH2PO4 and Na2HPO4 Salt Mixture
    E Erişir, E Gümüşkaya
    Kastamonu University Journal of Forestry Faculty 23 (2), 86 - 98 , 2023
    2023
    Citations: 1
  • Cellulosic Superabsorbent Production With Citric Acid Cross-linking Method
    AD BÜYÜKÜSTÜN, E ERİŞİR, E GÜMÜŞKAYA
    Sigma Journal of Engineering and Natural Sciences 11 (2), 185-191 , 2020
    2020
    Citations: 3
  • Cellulosic superabsorbent production with citric acid cross-linking method
    AD ÇELİK, E Erişir, E Gümüşkaya
    ORENKO 2020 - International Forest Products Congress , 2020
    2020
  • The Oxidative Pretreatments of Cellulose for Cellulosic Superabsorbents
    AD ÇELİK, E Gümüskaya, H Kirci, E Erişir
    Journal of Anatolian Environmental and Animal Sciences 4 (4), 657-661 , 2019
    2019
    Citations: 2
  • The Effects of H2SO4 Catalyst Ratios in Production Process on Cellulose Acetate Properties
    E Erişir, E Gümüşkaya
    Sigma Journal of Engineering and Natural Sciences 10 (1), 19-28 , 2019
    2019

MOST CITED SCHOLAR PUBLICATIONS

  • Examination of the chemical changes in spruce wood degraded by brown-rot fungi using FT-IR and FT-Raman spectroscopy
    EE Sefa Durmaz, Özlem Özgenç İsmail H. Boyacı, Ümit C. Yıldız
    Vibrational Spectroscopy 85 (July 2016), 202-207 , 2016
    2016
    Citations: 117
  • Longitudinal variation in selected wood properties of oriental beech and caucasian fir
    E Topaloglu, E Erisir
    Maderas. Ciencia y tecnología 20 (3), 403-416 , 2018
    2018
    Citations: 36
  • Using kraft black liquor as a wood preservative
    S Durmaz, E Erisir, UC Yildiz, OC Kurtulus
    Procedia-Social and Behavioral Sciences 195, 2177-2180 , 2015
    2015
    Citations: 33
  • A comparison between some wood bark extracts: Antifungal activity
    Ö Özgenç, S Durmaz, ÜC YILDIZ, E Erişir
    Kastamonu University Journal of Forestry Faculty 17 (3), 502-508 , 2017
    2017
    Citations: 31
  • The Effect of Sodium Borohydride on Alkaline Sulfite–Anthraquinone Pulping of Pine ( Pinus pinea ) Wood
    E Gumuskaya, E Erisir, H Kirci, N Misir
    Industrial & Engineering Chemistry Research 50 (13), 8340-8343 , 2011
    2011
    Citations: 21
  • Predictive models for modulus of rupture and modulus of elasticity of particleboard manufactured in different pressing conditions
    S Tiryaki, U Aras, H Kalaycıoğlu, E Erişir, A Aydın
    High Temperature Materials and Processes 36 (6), 623-634 , 2017
    2017
    Citations: 16
  • Alkaline sulphite pulping of Caucasian spruce (Picea orientalis L.) chips with additions of NaBH4 and ethanol
    E Erişir, E Gümüşkaya, H Kirci, N Misir
    Drewno: prace naukowe, doniesienia, komunikaty 58 (194), 89--102 , 2015
    2015
    Citations: 9
  • Acetylation of cellulose in ethyl acetate: characterization and thin film applications
    E Erişir, E Gümüşkaya
    Journal of Wood Chemistry and Technology 44 (4), 228-243 , 2024
    2024
    Citations: 8
  • Comparison of Reinforced Oxygen Delignification Methods for Old Corrugated Board (OCC) Fibres
    BO Koç, E Gümüşkaya, E Erişir, E Peşman, H Kırcı
    Drewno 60 (199) , 2017
    2017
    Citations: 5
  • Swelling Capacity in Carboxymethylcellulose – Cellulose Hybrid Hydrogels: The Effects of Oxidation with Zinc Chloride and Refining on Cellulose Used as Reinforcement
    AD Büyüküstün, E Erişir, E Gümüşkaya
    Drewno. Prace naukowe. Doniesienia. Komunikaty 68 (215), 00046 , 2025
    2025
    Citations: 3
  • Cellulosic Superabsorbent Production With Citric Acid Cross-linking Method
    AD BÜYÜKÜSTÜN, E ERİŞİR, E GÜMÜŞKAYA
    Sigma Journal of Engineering and Natural Sciences 11 (2), 185-191 , 2020
    2020
    Citations: 3
  • The Oxidative Pretreatments of Cellulose for Cellulosic Superabsorbents
    AD ÇELİK, E Gümüskaya, H Kirci, E Erişir
    Journal of Anatolian Environmental and Animal Sciences 4 (4), 657-661 , 2019
    2019
    Citations: 2
  • The Effects of Pre-evaporation Time on the Structure and Performance of Na-Lignosulfonate/PVA Composite Films
    E Erişir
    Sakarya University Journal of Science 29 (5), 580 - 591 , 2025
    2025
    Citations: 1
  • An Environmentally Friendly Solvent for Cellulose Acetate Production: Ethyl Lactate
    E Erişir, E Gümüşkaya
    Bartın Orman Fakültesi Dergisi 26 (3), 271 – 283 , 2024
    2024
    Citations: 1
  • Potassium Carbonate as Catalyst for Transesterification of Cellulose in TBAF/DMSO Solvent System Instead of KH2PO4 and Na2HPO4 Salt Mixture
    E Erişir, E Gümüşkaya
    Kastamonu University Journal of Forestry Faculty 23 (2), 86 - 98 , 2023
    2023
    Citations: 1
  • The Effect of Gum Arabic Addition on Lignosulfonate/Polyvinyl Alcohol Composite Films
    E Erişir
    BioResources 21 (2), 3688-3717 , 2026
    2026
  • Functionalized Cellulose-Reinforced CMC-Based Hydrogels: NaOH-Urea Catalyzed Oxidation and Mechanical Pretreatments, Crosslinking with Citric Acid and Epichlorohydrin, and …
    AD Büyüküstün, E Gümüşkaya, E Erişir
    Artvin Çoruh Üniversitesi Orman Fakültesi Dergisi 26 (2), 290 - 301 , 2025
    2025
  • Assessment of Lignin in Hazelnut Shells: A Comparative Study With Various Lignocellulosic Biomass Sources
    E Erişir, S Gümüş
    12th International Palandöken Scientific Studies Congress-Erzurum, Türkiye , 2025
    2025
  • The Isolation Methods Of Lignin From Woody Biomass
    E Erişir
    17th International Istanbul Scientific Research Congress , 2025
    2025
  • CMC Esaslı Hidrojel Üretimi için Fenton ile Oksitlenmiş ve Mekanik Rafinasyona Uğratılmış Selüloz ile Sürdürülebilir Takviyesi
    EE Asena Damla Büyüküstün, Esat Gümüşkaya
    Bartın Orman Fakültesi Dergisi 27 (2), 337 - 352 , 2025
    2025