Article
Plant Sciences
Pedro E. G. Loureiro, Sonia M. S. Cadete, Radina Tokin, Dmitry V. Evtuguin, Henrik Lund, Katja S. Johansen
Summary: Enzymatic processes offer energy-efficient and reagent-saving alternatives to traditional chemical routes in the production of dissolving pulp for regenerated cellulosic fibres. Enzymes can control the purity and molecular weight of dissolving pulp, with endoglucanases effectively reducing cellulose molecular weight and increasing reactivity for viscose production. Additionally, lytic polysaccharide monooxygenases synergistically modify bleached dissolving pulp along with endoglucanases, showing promising results for pulp quality improvement.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Materials Science, Paper & Wood
Sachin Jadhav, Ashwini Lidhure, Shirish Thakre, Vivek Ganvir
Summary: Utilization of low-cost paper grade pulp in Lyocell process is not feasible due to impurities that degrade cellulose and lower the onset temperature. Modified Lyocell process with pretreatment of pulps removes impurities and improves dissolution speed and safety, providing a practical solution for using cheaper pulp grades.
Article
Chemistry, Applied
Mona Verma, Neha Gahlot, Saroj S. Jeet Singh, Neelam M. Rose
Summary: The study demonstrated that chitosan-treated dyed cotton fabric showed higher antibacterial properties and a higher ultraviolet protection factor (UPF) compared to alum-treated dyed cotton fabric.
CARBOHYDRATE POLYMERS
(2021)
Article
Engineering, Multidisciplinary
Zunjarrao Kamble, Bijoya Kumar Behera, Rajesh Mishra, Pramoda Kumar Behera
Summary: The study introduces a composite material made from waste cotton fibers, loaded with rGO nanoparticles and enzyme-treated hemp fiber particles to enhance mechanical properties. The composites showed significant improvements in tensile, flexural, and impact strength, making them potential materials for interior furniture in trains and buses.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Environmental
Zisong Xu, Wenyu Huang, Shuangfei Wang, Hainong Song, Jing Xu, Gilles Mailhot, Zhangfa Tong, Hanbing Zhang, Zhuofeng Li
Summary: Due to the diversity of functional groups of antibiotics, the adsorption/complexation mechanism of three antibiotics co-adsorbed with Cd(II) were studied. The results showed that NOR complexed with Cd(II) through oxygen atoms to form a six-membered ring chelate, while SMT formed a ternary complex with Cd(II) and AC. In contrast, there was no complexation between TC and Cd(II).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Paper & Wood
Thomas Rosenau, Antje Potthast, Hubert Hettegger, Markus Bacher, Martina Opietnik, Thomas Roeder, Immanuel Adorjan
Summary: This study investigates the role of NMMO in aqueous solutions as a medium for generating transition metal (nano)particles in or on cellulosic materials. It highlights the importance of accurately describing the composition of the chemical systems used and the seemingly inert auxiliaries that are essential co-reactants in the metal (nano)particle generation.
Article
Environmental Sciences
Shuo Ai, Yue Qin, Yuxiang Hong, Linghui Liu, Wanguo Yu
Summary: This study modified cellulosic materials for the removal of Pb2+ in wastewater through carbonization and ion exchange methods, demonstrating improved adsorption capacity and recyclability, indicating its potential application value.
ENVIRONMENTAL POLLUTION
(2022)
Article
Materials Science, Paper & Wood
Jun Song, Fuqiang Long, Yufei Shi, Lele Cao
Summary: This study successfully prepared a new type of antibacterial Lyocell fiber with an antibacterial activity of over 99%, aiming to improve the antibacterial durability of the fiber.
Article
Engineering, Environmental
Chang Xu, Yue Feng, Xin-Xin Zhao, Shan Zhao, Shu-Guang Wang, Chao Song
Summary: This study investigates the influence of Cu(II) on the photolytic fate of Tetracycline (TC) under UV irradiation. Cu(II) significantly promotes the removal of TC and affects both direct and indirect photolysis of TC. Cu(II) induces the formation of singlet oxygen and hydroxyl radicals, and prefers to form TC-Cu(II) complexes. The TC-Cu(II) complexes are more vulnerable to ROS attack, promoting TC degradation. Cu(II) also changes the photolysis path of TC and alters the toxicity of the products. This study provides new insights into the environmental fate of antibiotics and has implications for wastewater treatment in the pharmaceutical and aquaculture industry.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Zisong Xu, Wenyu Huang, Hongjie Xie, Xiaoqing Feng, Shuangfei Wang, Hainong Song, Jianhua Xiong, Gilles Mailhot
Summary: This study investigates the co-adsorption mechanism of sulfamethazine and cadmium ions, revealing the promoting effect of cadmium ions on sulfamethazine adsorption and emphasizing the correlation between Cd2+-SMT complexation and SMT adsorption capacity.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Paper & Wood
Vinaya B. Ghodake, Rupesh A. Khare, S. T. Mhaske
Summary: Nanocellulose based materials have attracted the attention of researchers due to their versatile properties. This study focuses on the coating of Viscose fibre with Cellulose nanocrystals (CNCs) and its impact on the surface, tensile strength, dye-ability, and friction properties of the fibres. The results show that CNC coating increases the tensile strength of viscose fibre without affecting its frictional attribute and dye-ability, potentially reducing crack propagation on the fibre surface. The strong adhesion of CNCs with viscose fibre leads to a durable coating, and the thickness of the coated layer increases with higher CNC coating levels.
Article
Polymer Science
Yanping Zheng, Helin Ye, Guohu Zhao, Honghong Rao, Haixia Liu, Fang Liu, Na Wen, Kanjun Sun
Summary: A novel polymer was synthesized for the efficient removal of Pb(II), Cu(II), Cd(II) ions from multi-element aqueous solutions, demonstrating strong adsorption capacity and stability. The adsorption behavior was characterized by various analysis methods, showing successful fitting with kinetic and isotherm models.
Article
Chemistry, Applied
Ines S. F. Mendes, Antonio Prates, Dmitry V. Evtuguin
Summary: The increasing demand for cellulosic fibers is driven by the growing global population and the textile industry, as the annual cotton production is no longer sufficient to meet market demands. Regenerated cellulosic fibers produced from dissolving pulp are progressively filling the market gap, with new trends focusing on environmentally friendly production. Alternative processes involving direct dissolution of cellulose in recyclable solvents are emerging, leading to high quality rayon fibers.
CARBOHYDRATE POLYMERS
(2021)
Article
Engineering, Environmental
Shengcai Guo, Xin Li, Ruiming Zhao, Yan Gong
Summary: The comparative analysis showed that there is no significant difference in the ADP and WU values between the two processes. However, the value of lyocell fiber in PED is approximately three times that of viscose fiber. The AP value of viscose fiber is about twice that of lyocell fiber due to its use of more sulfide. Additionally, the GWP of lyocell fiber is approximately twice that of viscose fiber.
INTERNATIONAL JOURNAL OF LIFE CYCLE ASSESSMENT
(2021)
Article
Environmental Sciences
Siew Chun Low, Nur Atiah Binti Azmi, Chyh Shyang Ong, Jit Kang Lim
Summary: This study evaluates the selection and immobilization strategies of sensitive chromophores (dithizone, 1-(2-pyridylazo) 2-naphthol and 4-(2-pyridylazo)-resorcinol) on paper sensors. The results show that the DTz-paper sensor demonstrates a distinctive color change upon reaction with Pb2+ ions, and the color intensity is proportional to the metal concentration. This suggests the potential of the DTz-paper sensor for rapid detection of heavy metal ions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Polymer Science
Carolin Gleissner, Justus Landsiedel, Thomas Bechtold, Tung Pham
Summary: This review provides an overview of the activation and functionalization techniques for high performance polymer fibers, discussing their effects on fiber properties and potential applications. A comparison of different techniques is included to provide a better understanding of their versatility and limitations.
Article
Materials Science, Characterization & Testing
Madita Buchacher, Thomas Bechtold, Tung Pham
Summary: This study introduces an advanced method for detecting thiol content in intact keratin fibers, with the heterogeneous potentiometric back titration method being able to reliably quantify thiol concentration in the range of 6.83 to 26.17 µmol/g.
Article
Chemistry, Physical
Christian Biermaier, Phillip Petz, Thomas Bechtold, Tung Pham
Summary: Conductive textiles are important in electronics development, but their machine-washing durability is a major challenge. In this study, copper-plated polyamide 66 and cellulose fabrics were used to investigate wash ageing mechanisms. A flex tester with online resistance recording was developed and various tests were conducted. The results showed that the contribution of mechanical and chemical ageing varies depending on the substrate material. The delamination of the copper layer was found to be the main cause of fatigue, facilitated by the washing solution. A cumulative fatigue model was developed and the determination of the end of lifetime by intended use was discussed.
Article
Polymer Science
Florian Wurm, Felix Netzer, Uwe Schaeffner, Jorg Leukel, Julia Schweiss, Pham Tung, Thomas Bechtold
Summary: The aim of this study was to investigate the interface between cellulose acetate (CA) and viscose (CV) in an all-cellulosic compound and to evaluate the feasibility of hydrophobic CA-coatings on viscose fibers. The mechanical strengths of cellulose foil-CA compounds were compared to pure CA samples. The effects of CA coating on CV fibers were investigated by pretreating the fibers and determining their properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Avinash P. Manian, Felix E. Kraegeloh, Doris E. Braun, Amalid Mahmud-Ali, Thomas Bechtold, Tung Pham
Summary: The investigation focused on the selective dissolution of polyamide 66 (PA 66) from mixtures with cellulose fibers using calcium chloride-ethanol-water (CEW). The dissolved PA 66 was reprecipitated with water. The cellulose fibers were undamaged by the treatment and could effectively remove a substantial proportion of the PA 66 residues. About 80-90% of the original PA 66 in the mixtures could be recovered. Effective removal of calcium residues from the recovered PA 66 is critical to prevent changes in its melt behavior.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Electrochemistry
Noemi Aguilo-Aguayo, Jacqueline Tschannett, Avinash P. Manian, Thomas Bechtold, Manuel Scheiderbauer
Summary: This paper investigates the use of three-dimensional continuous carbon filament electrodes in a redox flow cell. The findings show that these embroidered electrodes have advantages such as low pressure drop and high mass transfer coefficient, and provide avenues for further development of 3D carbon fiber electrodes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Christian Biermaier, Thomas Bechtold, Tung Pham
Summary: This study investigates the electroless copper deposition performance on woven cellulose fabrics. Silver seeds were printed on the fabrics, followed by electroless copper deposition. The layer formation and conductivity of coated fabrics were studied by varying the deposition time. It was found that the electrical resistance initially decreased rapidly with increasing deposition time, and then reached a plateau after 120 min. The strain sensitivity and percolation efficiency of the coated fabrics decreased as the deposition time increased. The substrate construction, such as yarn crossings, had a strong influence on the conductive performance and percolation efficiency.
Article
Chemistry, Applied
Avinash P. Manian, Sophia Mueller, Thomas Bechtold, Tung Pham
Summary: Circularity of post-consumer textile wastes should take into account the presence of dyes. Denim textiles, which are predominantly dyed with indigo, can be recycled fiber-to-fiber to reuse the dye. An analytical method using alkaline Fe(II)-complex with triethanolamine as ligand is developed to quantify the indigo content. The method allows for measurement of dye concentration, regardless of the uneven dye distribution in denim, making it suitable for indigo quantification in denim waste.
Article
Polymer Science
Michael Cordin, Avinash P. Manian, Thomas Bechtold, Tung Pham
Summary: Thermoplastic all-polymer composites, made from the same material for reinforcing fibers and matrix material, have become increasingly popular due to their potential for recycling compared to traditional composites with inorganic reinforcements. This study proposes a new preparation concept for all-polyamide composites using a hybrid yarn of polyamide-6 and polyamide-66 fibers. By embroidering the hybrid yarn in the desired direction on a polyamide-6 fabric, composites with desired reinforcing fiber orientation can be prepared, maintaining the integrity of the reinforcing and unmelted PA66 fibers embedded in a molten PA6 matrix during thermoforming at 230 degrees C. The mechanical properties of these composites, including different matrix-to-reinforcement ratios and reinforcing fiber orientations, are characterized using quasi-static and high-speed tensile tests as well as penetration tests.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Biomedical
Florian Wurm, Margit Lenninger, Astrid Mayr, Cornelia Lass-Floerl, Tung Pham, Thomas Bechtold
Summary: This study focuses on the development of a moist, adaptive and anti-microbial wound dressing using bio-based and degradable materials. The dressing demonstrates pH-dependent release of an active agent, and the size of the dressing can be adjusted to minimize exposure of healthy tissue to the active agent.
JOURNAL OF BIOMATERIALS APPLICATIONS
(2023)
Article
Acoustics
Margit Lenninger, Thomas Bechtold, Tung Pham
Summary: C.I. Sulphur Black 1 is an important dye for cellulose textiles due to its maximum colour depth at reasonable costs. In this study, pad-steam dyeing with C.I. Sulphur Black 1 was used, and the effects of an intensified washing process with ultrasonification on rub fastness were investigated. The results showed that ultrasound washing can improve the wet rub fastness of the dye.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Christian Biermaier, Carolin Gleissner, Thomas Bechtold, Tung Pham
Summary: Researchers investigated the basic mechanism of using citrate anion to fix silver species and form metal catalyst directly on textile substrates. During the particle formation process and subsequent electroless copper deposition, silver undergoes multiple oxidation state changes. Under reducing conditions, silver ions are converted to silver metal. Additionally, the thermal decomposition of silver citrate generates CO2 and hexane-2,5-dione.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Thomas Bechtold, Noemi Aguilo-Aguayo, Tung Pham
Summary: Disperse dyes are important colorants for dyeing polyester fibers, but their wastewater discharge poses an environmental burden. This study explores an alternative method of electrochemical dye reduction, and successfully demonstrates the cathodic reduction of dispersed organic dyes.
Article
Chemistry, Physical
Justus Landsiedel, Jacqueline Tschannett, Margit Lenninger, Sandra Stroj, Matthias Domke, Thomas Bechtold, Tung Pham, Noemi Aguilo-Aguayo
Summary: The study introduces the use of a siloxane interlayer as a strategy to modify the surface properties of polyamide 6.6 fabrics and improve the uniformity of copper surface coating. The application of the siloxane intermediate coating significantly enhances electrical conductivity and improves the appearance and properties of the fabrics.
SURFACES AND INTERFACES
(2023)
Article
Construction & Building Technology
Julian Konzilia, Jonas Wachter, Matthias Egger, Christoph Waltl, Thomas Froeis, Thomas Bechtold, Juergen Feix
Summary: This research investigates the manufacturing process and mechanical properties of textile reinforcements fabricated using embroidery technology. It compares the advantages of embroidery technology with other manufacturing methods and presents comprehensive test results. The study reveals that the mechanical properties of the reinforcements are influenced by the manufacturing process and demonstrates the sufficient bonding behavior of the embroidered reinforcements.
