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Nanocellulose-Based Adhesives for Sustainable Wood-Polymer Composites:Recent Advancement and Future Perspective

Journal of Renewable materials 2025年第4期13卷 773-798页

作者： Amelia Hariry Efri Mardawati Apri Heri Iswanto Tati Karliati Lukmanul Hakim Zaini Muhammad Adly Rahandi Lubis Department of Agro-Industrial Technology Universitas PadjadjaranBandung45363Indonesia Reseach Collaboration Center for Biomass and Biorefinery BRIN and Universitas PadjadjaranBandung45363Indonesia Department of Forest Product Technology Faculty of ForestryUniversitas Sumatera UtaraMedan20355Indonesia School of Life Sciences and Technology Institut Teknologi BandungBandung40132Indonesia Department of Forest Products Faculty of Forestry and EnvironmentIPB UniversityBogor16680Indonesia Institute of Wood Technology and Renewable Materials Department of Material Sciences and Process EngineeringUniversity of Natural Resources and Life SciencesVienna3430Austria Research Center for Biomass and Bioproducts National Research and Innovation AgencyCibinong16911Indonesia

Nanocellulose-based adhesives are gaining attention as a viable alternative to conventional adhesives,offering benefits such as cost-effectiveness and scalability,which make them suitable for various sectors,including cosmetics,pharmaceuticals,biodegradable products,and as reinforcing agents in natural *** review delves into the current advancements in nanocellulose-based adhesive solutions for sustainable and eco-friendly wood composites,using systematic review methods and bibliometric *** were collected from the Scopus database,spanning from 2007 to 2024,and visualized using VOSviewer to highlight emerging trends in the *** analysis revealed that nanocellulose shows great potential as a reinforcing component for traditional adhesives used in wood products such as phenol-formaldehyde(PF),urea-formaldehyde(UF),polymeric diphenylmethane diisocyanate(pMDI),and melamine-urea ***,derived from the most abundant biopolymer,cellulose,has been utilized in its nanoscale form for adhesive *** review emphasizes the advancements in using cellulose nanocrystals(CNC)and cellulose nanofibrils(CNF)to develop sustainable *** explores both the challenges and future prospects for large-scale production and application of nanocellulose-based adhesives.

关键词： Bio-adhesives nanocellulose cellulose nanocrystals wood-based composites

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Periodic Two-dimensional Arrays of Silicon Quantum Dots for Nanoscale Device Applications

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MRS Online Proceedings Library 2021年第1期737卷 438-443页

作者： Christopher C. Striemer Rishikesh Krislinan Qianghua Xie Leonid Tsybeskov Philippe M. Fauchet Department of Electrical and Computer Engineering University of Rochester Rochester USA Process and Material Characterization Laboratory Semiconductor Product Sector Mesa USA Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark USA

We report a successful unification of standard lithographic approaches (top down), anisotropic etching of atomically smooth surfaces, and controlled crystallization of silicon quantum dots (bottom up) to produce silicon nanoclusters at desired locations. These results complement our previous demonstration of silicon nanocrystal uniformity in size, shape, and crystalline orientation in nanocrystalline silicon (nc-Si)/SiO2 superlattices, and could lead to practical applications of silicon nanocrystals in electronic devices. The goal of this study was to induce silicon nanocrystal nucleation at specific lateral sites in a continuous amorphous silicon (a-Si) film. Nearly all previous studies of silicon nanocrystals are based on films containing isolated nanocrystals with random lateral position and spacing. The ability to define precise two-dimensional arrays of quantum dots would allow each quantum dot to be contacted using standard photolithographic techniques, leading to practical device applications like high-density memories. In this work, a template substrate consisting of an array of pyramid-shaped holes in a (100) silicon wafer was formed using standard microfabrication techniques. The geometry of this substrate then influenced the crystallization of an a-Si/SiO2 superlattice that was deposited on it, resulting in preferential nucleation of silicon nanoclusters near the bottom of the pyramid holes. These clusters are clearly visible in transmission electron microscopy (TEM) images, while no clusters have been observed on the planar surface areas of the template. Possible explanations for this selective nucleation and future device structures will be discussed.

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Progress Toward Composition-Based Inline Sorting and Recycling of Multilayer Polymer Packaging

SSRN

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SSRN 2025年

作者： Bredács, Márton Barretta, Chiara Geier, Jutta Feuchter, Michael Plevová, Katerina Oreski, Gernot Koinig, Gerald Csányi, Brigitta Viktória Gergely, Szilveszter Polymer Competence Center Leoben GmbH Sauraugasse 1 Leoben8700 Austria Material Science and Testing of Polymers Department Polymer Engineering and Science Montanuniversitaet Leoben Franz Josef-Street 18 Leoben8700 Austria Waste Processing Technology and Waste Management Department of Environmental and Energy Process Engineering Montanuniversitaet Leoben Franz Josef-Straße 18 Leoben8700 Austria Department of Applied Biotechnology and Food Science Budapest University of Technology and Economics Műegyetem Rkp. 3 Budapest1111 Hungary

Two-dimensional plastic packaging films provide vital protection during transport and storage of food and other goods, offering significant economic benefits compared to other materials. However, their usage results in a considerable amount of packing waste including multi-materials and multilayer films made of various polymer layers, which are exceptionally difficult to recycle. To promote sustainable material usage, efforts towards recycling of these two‑dimensional materials are essential. This work presents a proof of concept for composition-based mechanical sorting of multilayer plastic films. The use of transflectance near-infrared (NIR) hyperspectral imaging data collected on a laboratory scale sorting line and principal component analysis (PCA) allowed a composition-specific distinction. Besides the separation of multilayers from monolayers, several multilayer classes according to their two major polymer components were identified. In case of two commonly used multilayers, polyethylene-polyamide (PE/PA) and polyethylene-polyethylene terephthalate (PE/PET), further NIR based classification was found and investigated using Raman and attenuated total reflectance Fourier transform infrared (FTIR-ATR) imaging spectroscopy. Cross-section analysis showed that only certain classes within PE/PA multilayers contain ethylene vinyl alcohol, whereas classes within PE/PET showed the presence of polyvinyl alcohol layers and different number of layers. This composition-based sorting method could enhance the recycling potential of multilayer packaging films. © 2025, The Authors. All rights reserved.

关键词： Hyperspectral imaging

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Insights into Enhanced Toluene Oxidation Performance Over Mn-Mof-Derived Catalysts Via Isogenous Ionic Surface Doping

SSRN

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SSRN 2023年

作者： Wang, Jianshen Zhang, Di Zhao, Gangguo Yuan, Hua Liu, Dan Kuvarega, Alex T. Mamba, Bhekie B. Li, Hu Gui, Jianzhou State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process Engineering School of Material Science and Engineering Tiangong University Tianjin300387 China School of Chemical Engineering and Technology Tiangong University Tianjin300387 China School of Chemistry Tiangong University Tianjin300387 China Ningxia Coal Industry Co. Ltd. Chn Energy Yinchuan750011 China Institute for Nanotechnology and Water Sustainability College of Science Engineering and Technology University of South Africa Florida Johannesburg1709 South Africa

A series of MnOx catalysts were prepared through a Mn-MOF-derived method, and their phase structures gradually change from Mn3O4-Mn2O3 to Mn2+ doped Mn2O3, and finally to Mn2O3 with increasing calcination temperature. The optimum MnOx-500 catalyst calcined at 500ºC, in the form of Mn2+-doped-Mn2O3 phase was used to construct an isogenous ion surface doped catalyst, which exhibited the best catalytic performance for toluene oxidation due to the large average pore size, the enhanced low-temperature redox properties, weakest Mn-O bond and the highest percentage of low-valence Mn(II) species. The possible route of toluene oxidation was proposed based on in-situ FTIR, and interestingly all the reaction intermediates including benzyl, benzyl alcohol, benzaldehyde, benzoate, phenol, maleate and formate, were produced on MnOx-400;while for MnOx-500, Mn2+-doped-Mn2O3, only benzyl, benzaldehyde, benzoate, maleate and formate were formed, and the rate-determining step for conversion of benzoate into ring-oping products requires less energy. The work opens a new avenue to the precise construction of active sites based on multivalent metal oxide catalysts for dehgradation of volatile organic compounds. © 2023, The Authors. All rights reserved.

关键词： Pore structure

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Numerical Simulation of Cavitation and FlashBoiling in GDI Nozzle and Spray 5

Numerical Simulation of Cavitation and FlashBoiling in GDI N...

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5th International Symposium on Hydrogen Energy and Energy Technologies, HEET 2022

作者： Zhao, Zirui Zhang, Xinyu Gong, Mengjun Chen, Mengrong Ren, Yong Department of Mechanical Materials and Manufacturing Engineering University of Nottingham Ningbo China 199 Taikang East Road Ningbo315100 China No.7 Shanglinyuan Road High-tech Zone Chang'an District Xi'an710000 China Research Center for Fluids and Thermal Engineering University of Nottingham Ningbo China 199 Taikang East Road Ningbo315100 China Ningbo Key Laboratory on Energy Material and Technology University of Nottingham Ningbo China 199 Taikang East Road Ningbo315100 China Key Laboratory for Carbonaceous Wastes Processing and Process Intensification Research of Zhejiang University of Nottingham Ningbo China 199 Taikang East Road Ningbo315100 China

This work aims at using Computational Fluid Dynamics (CFD) method to establish a gasoline direct injection (GDI) engine nozzle and combustion chamber model to simulate cavitation and flash boiling phenomena and analyze how these phenomena affect the engine performance. FLUENT 15.0 is used to simulate the flow of fuel. The cavitation phenomenon in GDI nozzle was simulated comprehensively, and the influences of parameter values such as inlet pressure and outlet pressure on cavitation were studied in this work. The results show that high injection pressure can promote the occurrence of cavitation and high outlet pressure has an inhibitory effect on cavitation. However, the effect of cavitation on atomization cannot be seen intuitively only through the simulation of the internal nozzle. The two-dimensional inter nozzle model established in this work is a foundation for the establishment of external nozzle model. It can provide specific boundary conditions at nozzle outlet. In addition, a three-dimensional external nozzle model was established to simulate the flash boiling spray in the combustion chamber. Based on the mechanism, it can be found that flash boiling spray improves the atomization quality. After verifying the simulation results with relevant experiments, these models could bring great convenience to the study of cavitation and flash boiling with sufficient reliability in further study. © Published under licence by IOP Publishing Ltd.

关键词： Cavitation

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A simplified method for enhanced accuracy in calculating adsorption thermodynamic parameters

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Journal of Chemical Thermodynamics 2025年 208卷

作者： Ivanović, Tijana Tomović, Tijana Popović, Daniela Miladinović, Jelena Arrad, Mouad Miladinović, Zoran Institute for Multidisciplinary Research University of Belgrade Kneza Višeslava 1 Belgrade11 030 Serbia at Institute for Material Technology University of Innsbruck Technikerstraße 13/V Innsbruck6020 Austria Faculty of Technology and Metallurgy University of Belgrade Karnegijeva 4 Belgrade11 120 Serbia Innovation Center of the Faculty of Technology and Metallurgy University of Belgrade Karnegijeva 4 Belgrade11 120 Serbia Department of Process Engineering 'Equipe Energie et Procedes Propres' National School of Mines of Rabat Morocco Institute of General and Physical Chemistry Studentski trg 12-16 Belgrade11 000 Serbia

This study investigates the thermodynamic parameters of phosphate adsorption on activated carbon using the Pitzer ion-interaction model. The adsorption data were analyzed using the Langmuir and Sips models, both providing satisfactory fits. Maximum adsorption (plateau) occurred at an equilibrium phosphate concentration of 60.8 mmol⋅ dm−3 (pH = 5.1), with an adsorption capacity of 7.03 mmol⋅g−1. The Pitzer model was used to calculate the activity coefficient of phosphates, considering the influence of all ions in the solution on the adsorption plateau. The maximum degree of dissociation of H₂PO₄-(aq) ions was determined to be xd(2) = 0.0026, taking hydrolysis into account. The activity coefficient of KH₂PO₄ in the mixed solution {K₂HPO₄ + KH₂PO₄ + H₃PO₄}(aq) was found to be γ± = 0.7788, while in a pure KH₂PO₄ solution at the same ionic strength corresponding to the plateau, it is γ± = 0.7790. Given the minor difference in activity coefficient, the mixed solution could be approximated as a pure KH₂PO₄(aq) for thermodynamic analysis, which greatly simplified the calculations. The Gibbs free energy was ΔGL = − 8.6200 ± 0.0004 (kJ⋅mol−1) using the Langmuir equilibrium constant shifting to ΔGa = − 9.240 ± 0.006 (kJ⋅mol−1) when accounting for activity coefficient and the thermodynamic equilibrium constant. With the Sips model, the Gibbs free energy was ΔGS = − 9.620 ± 0.004 (kJ⋅mol−1) and further refinement using phosphate activity coefficient gave ΔGa = −10.235 ± 0.007 (kJ⋅mol−1). The absolute differences in adsorption energy were approximately 7 % (Langmuir) and 6 % (Sips), highlighting the importance of considering ionic activities. © 2025 Elsevier Ltd

关键词： Gibbs free energy

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Facet Effect on Nanosheet Co3O4 Catalysts for Toluene Oxidation: Decisive Role of Co3+ and Reaction Induced Oxygen Vacancy

SSRN

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SSRN 2023年

作者： Liu, Rui Wu, Tao Yin, Hongfeng Chu, Yuting Li, Yiming Li, Kaijie Li, Tong Yu, Hongbo Wu, Biao Zhang, Qiuju Liang, Rui Chen, Yipei Department of Chemical and Environmental Engineering The University of Nottingham Ningbo China Ningbo315100 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences 1219 Zhongguan West Road Zhejiang Ningbo315201 China Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences Zhejiang Ningbo315201 China Key Laboratory of Carbonaceous Waste Processing and Process Intensification of Zhejiang Province University of Nottingham Ningbo China Ningbo315100 China University of Science and Technology of China Hefei230026 China

Co3O4 is recognized as an advantageous material for harmful VOCs abatement. In this paper, three types of Co3O4 catalysts with nanosheet morphology or tissue were synthesized and applied in the pyrolysis of toluene. This research revealed the proportion of exposed facets of three samples and the comprehensive DFT calculated results on facets explained our experimental results well. A series of characterization results showed that Co3+ was more important than surface oxygen, and the defects formed in the reaction process of the catalyst were more important than the oxygen vacancies. This work on Co3O4 catalytic material and toluene degradation provides new insight on facets, Co3+ and oxygen vacancies for enhancing catalyst development in practical uses. © 2023, The Authors. All rights reserved.

关键词： Nanosheets

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Lattice Boltzmann simulation of cathode catalyst layer degradation on transport reaction process within a proton exchange membrane fuel cell

Green Energy and Resources

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Green Energy and Resources 2023年第2期1卷

作者： Wang, Yulin Liao, Xiangling Xu, Haokai He, Wei Li, Hua Xing, Lei Wang, Xiaodong Tianjin Key Lab of Refrigeration Technology Tianjin University of Commerce Tianjin 300134 China Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences Zhejiang Province Ningbo 315200 China Department of Chemical and Process Engineering University of Surrey Guildford GU2 7XH United Kingdom Research Center of Engineering Thermophysics North China Electric Power University Beijing 102206 China

The degradation of the catalyst layer significantly affects the gas transport and electrochemical processes in the porous electrodes, thus affecting the performance of proton exchange membrane fuel cells. To reveal the catalyst layer degradation impact, the microscopic porous structure of the cathode catalyst layer was reconstructed by a random algorithm in this work. Consequently, Lattice Boltzmann method was used to study the oxygen transport and electrochemical reaction processes at the limiting current density condition with considering the degradation of platinum, carbon particles, and ionomers under uniform and exponential degradation rates, respectively. The results reveal that the degradation of platinum reduces the reaction sites in the catalyst layer, thus deteriorating the electrochemical kinetics and lowering the total reaction rate. On the contrary, the degradation of carbon and ionomer shows two diametrically opposed effects. On the one hand, the oxygen transport is improved due to carbon and ionomer degradation, especially for ionomer degradation, thereby accelerating the total reaction rate. On the other hand, the degradation of carbon and ionomer triggers the detachment of platinum particles, leading to a decrease in reaction rate. In the early stages of the multi-component simultaneous degradation process, the total reaction rate is prohibited by oxygen transport limitation inside the catalyst layer;as the degradation degree increases, the oxygen transport through the ionomer films is enhanced and the electrochemical kinetics becomes the rate determining factor, especially for exponential degradation rate. This study provides a comprehensive assessment of the oxygen transport and electrochemical reaction within the catalyst layers with respect to different degrees of catalyst layer degradation, which can guide the design of high-performance anti-degradation catalyst layers for the next generation of fuel cells. © 2023 The Authors

关键词： Catalyst layer degradation Lattice Boltzmann method Oxygen reduction reaction Oxygen transport Proton exchange membrane fuel cell

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Grafted Pbi with Multiple Proton Hopping Sites with Enhanced Performance for Application in Ht-Pemfcs

SSRN

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SSRN 2024年

作者： You, Yamei Liu, Binghui Wang, Jiaqi Deng, Xinyang Liu, Qian Liang, Jinli Zhao, Chengji Hou, Yanjun Zhang, Haiqiu The Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education Heilongjiang University Harbin150080 China The Key Laboratory of High Performance Plastics Ministry of Education College of Chemistry Jilin University Changchun130012 China Key Laboratory of Chemical Engineering Process and Technology High Efficiency Conversion College of Heilongjiang Province School of Chemistry and Materials Science Heilongjiang University Harbin150080 China

Grafted polybenzimidazole (PBI) with multiple proton hopping sites was synthesized. The novel structure of anhydrous high-temperature proton exchange membrane had multiple quaternary ammonium groups on the side chains of PBI. These groups could interact with more phosphoric acid (PA) molecules and cross-link the chains of PBI, thus improving the PA absorption capacity and mechanical properties. Importantly, the cross-linked structure successfully prevented the loss of PA molecules. The proton conductivity of grafted PBI membranes was high (198.5 mS∙cm-1, 160 °C, anhydrous). Under anhydrous and free backpressure conditions, the grafted PTPBI showed an ideal peak power density of 361.7 mW∙cm-2 (180 °C). The open-circuit voltage of the aforementioned component was around 1.0 V, indicating commendable level of hermeticity. Further, the grafted polybenzimidazole membranes demonstrated superior antioxidant performance, compared to pure PBI after 204 hours of treatment with Fenton's reagent. The cross-linking also enhanced the mechanical properties (PTPBI-20%, undoped PA, 126.5 MPa) and dimensional stabilities of the membranes to some extent. The thermal stabilities of grafted PBI membranes were suitable for applications in high-temperature proton exchange membrane fuel cells (HT-PEMFCs). For HT-PEMFCs, the polymer electrolyte membrane materials with increased performance after grafting of quaternary ammonium groups showed tremendous promise. © 2024, The Authors. All rights reserved.

关键词： Membranes

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Highly Effective Copper-Ceria Catalysts for Co-Free Hydrogen Production in Methanol Steam Reforming

SSRN

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SSRN 2023年

作者： Yu, Wen-Zhu Yang, Nai-Tao Wang, Wei-Wei Xu, Jun Chen, Wen-Qing Wu, Kai-Wen Gao, Xin-Yi Wei, Shuai Meng, Xiu-Xia Jia, Chun-Jiang School of Chemistry and Chemical Engineering Shandong University of Technology Zibo255049 China Key Laboratory for Colloid and Interface Chemistry Key Laboratory of Special Aggregated Materials School of Chemistry and Chemical Engineering Shandong University Jinan250100 China Key Laboratory of Gold Mineralization Processes and Resource Utilization MNR Shandong Provincial Key Laboratory of Metallogenic Geological Process and Resource Utilization Shandong Institute of Geological Sciences Jinan250013 China School of Material and Chemical Engineering Xuzhou University of Technology Xuzhou221018 China

To prepare supported catalysts with distinct structures for identifying active metals is a crucial challenge in heterogeneous catalysis. Here we report the fabrication of copper-ceria catalysts that contains different copper species by adjusting the metal loading content and leaching. Using the methanol steam reforming (MSR) for hydrogen production as probe reaction, it is H2 and CO2 rather than CO can be detected for each catalyst. It means that these catalysts achieve CO-free H2 production from 200 to 350 °C, which is of potential use for proton exchange membrane fuel cells (PEMFC). The H2 production rate of 5CuCe is as high as 53.8 mLH2×gcat-1×min-1 at 250 °C, much higher than that of other reported copper-ceria catalysts whose Cu loading is close to or ahead of 5 wt%. Based on the precise and integrated characterizations, the separated CuO nanoparticles in the 50CuCe catalyst are useless for catalysis on account of the similar activity to the leached one. By contrast, both highly dispersed CuOx clusters and Cu−[Ox]−Ce structures possibly contribute to CO-free H2 production. © 2023, The Authors. All rights reserved.

关键词： Hydrogen production

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