Academic literature on the topic 'UF adhesive'

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Journal articles on the topic "UF adhesive"

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Lubis, M. A. R., A. H. Iswanto, L. S. Hua, et al. "Post-modification of ultra-low molar ratio urea-formaldehyde adhesive with different types and levels of organic acid hardener." IOP Conference Series: Earth and Environmental Science 1115, no. 1 (2022): 012037. http://dx.doi.org/10.1088/1755-1315/1115/1/012037.

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Abstract Ultra-low (UL) molar ratio urea–formaldehyde (UF) adhesive is a class of UL formaldehyde-emitting adhesive systems for wood-based panels. However, the UL molar ratio exhibits poor reactivity, low cohesion strength, and inferior adhesion. This study aimed to enhance the performance of UL molar ratio UF adhesive via post-modification with the addition of different types and levels of organic acid hardener, such as acetic acid (AA), maleic acid (MA) and citric acid (CA) at 3 and 5% level based on the theoretical solids content of UF adhesive. The solids content, gelation time, viscosity,
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Popovic, Mladjan, Nevena Vukic, Milanka Djiporovic-Momcilovic, et al. "Effects of poly(diallyldimethylammonium chloride) addition on the curing kinetics of urea-formaldehyde adhesives for particleboards." Chemical Industry 76, no. 1 (2022): 19–28. http://dx.doi.org/10.2298/hemind210914001p.

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Addition of poly(diallyldimethylammonium chloride) (PDDA) on the performances of urea-formaldehyde (UF) adhesives was evaluated in this work. Three types of UF adhesives were prepared, one without PDDA addition, and two types with PDDA addition of 1 and 3 wt.% per dry UF adhesive mass. These UF adhesive systems were used for producing experimental particleboard panels. The addition of PDDA decreased the thickness swelling of the panel samples, while the internal bond of the particleboards increased significantly only at the highest PDDA content (3 wt.%). Differential scanning calorimetry (DSC)
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Bekhta, Pavlo, Gregory Noshchenko, Roman Réh, et al. "Properties of Eco-Friendly Particleboards Bonded with Lignosulfonate-Urea-Formaldehyde Adhesives and pMDI as a Crosslinker." Materials 14, no. 17 (2021): 4875. http://dx.doi.org/10.3390/ma14174875.

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The purpose of this study was to evaluate the feasibility of using magnesium and sodium lignosulfonates (LS) in the production of particleboards, used pure and in mixtures with urea-formaldehyde (UF) resin. Polymeric 4,4′-diphenylmethane diisocyanate (pMDI) was used as a crosslinker. In order to evaluate the effect of gradual replacement of UF by magnesium lignosulfonate (MgLS) or sodium lignosulfonate (NaLS) on the physical and mechanical properties, boards were manufactured in the laboratory with LS content varying from 0% to 100%. The effect of LS on the pH of lignosulfonate-urea-formaldehy
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Gavrilovic-Grmusa, Ivana, Jovan Miljkovic, Milanka Djiporovic-Momcilovic, and Gordana Radosevic. "Penetration of urea-formaldehyde adhesives in wood tissue, part I: Radial penetration of UF adhesives into beech." Bulletin of the Faculty of Forestry, no. 98 (2008): 39–48. http://dx.doi.org/10.2298/gsf0898039g.

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Adhesive penetration plays an important role in wood adhesion, since wood is a porous material. The degree of penetration mostly depends on the wood factors, resin type and formulation and processing parameters. Tangentially cut 5 mm thick beech wood (Fagus moesiaca) plies, 100 mm long (parallel to grain) and 30 mm wide, were prepared for this study. The urea-formaldehyde (UF) adhesive was applied to the surface of one ply. Two plies were assembled into sample so that the grains of two plies were parallel. Samples were pressed in a hydraulic press at 120?C and 0,7 MPa for 15 min. Microtome tes
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Nociar, Marek, Gengyang Pipíška, Pavlo Bekhta, Pavel Jiang, Erdeng Du, and Xiaoyong Wei. "Effect of wood species, bark particle size, and adhesive type on the properties of bark-based boards." BioResources 20, no. 2 (2025): 4044–67. https://doi.org/10.15376/biores.20.2.4044-4067.

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Significant quantities of bark are generated during wood processing, with the majority being utilized for energy production and soil enhancement. This study investigated the influence of bark particle size and resin type (urea-formaldehyde (UF) and melamine-urea-formaldehyde (MUF)) on the properties of particleboards made from spruce and pine bark. Board samples were fabricated using different bark particle sizes (2 to 5 mm and 5 to 8 mm) and varying adhesive contents (5% and 7%) for both UF and MUF adhesives. Reference particleboards were manufactured using industrial wood particles with the
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Yang, Hongxing, Hao Wang, Guanben Du, et al. "Ureido Hyperbranched Polymer Modified Urea-Formaldehyde Resin as High-Performance Particleboard Adhesive." Materials 16, no. 11 (2023): 4021. http://dx.doi.org/10.3390/ma16114021.

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The performance of urea-formaldehyde (UF) resin and its formaldehyde emission is a natural contradiction. High molar ratio UF resin performance is very good, but its formaldehyde release is high; low molar ratio UF resin formaldehyde release is reduced, but the resin itself performance becomes very bad. In order to solve this traditional problem, an excellent strategy of UF resin modified by hyperbranched polyurea is proposed. In this work, hyperbranched polyurea (UPA6N) is first synthesized by a simple method without any solvent. UPA6N is then added into industrial UF resin in different propo
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Moya, Róger, Ana Rodríguez-Zúñiga, and José Vega-Baudrit. "Effects of Adding Multiwall Carbon Nanotubes on Performance of Polyvinyl Acetate and Urea-Formaldehyde Adhesives in Tropical Timber Species." Journal of Nanomaterials 2015 (2015): 1–15. http://dx.doi.org/10.1155/2015/895650.

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Multiwall carbon nanotubes (MWCNTs) functionalized with hydroxyl groups (MWCNTs-OH) have been incorporated into polyvinyl acetate (PVAc) and urea-formaldehyde (UF) adhesives utilized in tropical wood gluing. The Raman spectroscopy, the atomic force microscopy (AFM), and transmission electron microscopy (TEM) were used to describe the MWCNTs-OH. The adhesives were evaluated in three concentrations of MWCNTs-OH: 0% (control), 0.05%, and 0.1%. The evaluation included color, the distribution of MWCNTs-OH by TEM and AFM, thermal stability and viscosity of the adhesives, and shear strength (SS) of t
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Wang, Xi, Hui Zhao, Bo Zhang, Xiuchan Wen, Siyu Huang, and Weixing Gan. "The Removal of Formaldehyde from Urea Formaldehyde Adhesive by Sodium Borohydride Treatment and Its Application in Plywood." Polymers 16, no. 7 (2024): 969. http://dx.doi.org/10.3390/polym16070969.

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The global production of plywood is constantly increasing as its application in the furniture and interior decoration industry becomes more widespread. An urgent issue is how to decrease the formaldehyde released from plywood, considering its carcinogenic effect on humans and harm to the environment. Reducing the free formaldehyde content of the urea formaldehyde (UF) adhesives used in the preparation process is considered an effective method. Therefore, it is necessary to identify a new type of formaldehyde scavengers. Here, the strongly reducing substance sodium borohydride was used to reduc
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Zhang, Hao, Ying She, Shu Ping Song, and Jun Wen Pu. "Modified Nanocrystalline Cellulose Used for Improving Formaldehyde Emission and Bonding Strength of Urea Formaldehyde Resin Adhesive." Key Engineering Materials 562-565 (July 2013): 846–51. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.846.

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Nanocrystalline cellulose (NCC) was used for improving the formaldehyde (HCHO) emission and bonding strength of urea formaldehyde (UF) resin adhesive in fiberboard and plywood. The original NCC was modified by 3-aminopropyltriethoxysilane (APTES) and the wetting property with UF resin adhesive was improved by 26.4%. The UF resin adhesive with modified NCC was characterized by X-ray powder diffraction (XRD), thermogravimetric analysis (TG) and Fourier transform infrared (FT-IR). The crystal region of UF resin adhesive was influenced by NCC and the diffraction intensity of the peak at 2θ = 22.82
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Veigel, Stefan, Jörn Rathke, Martin Weigl, and Wolfgang Gindl-Altmutter. "Particle Board and Oriented Strand Board Prepared with Nanocellulose-Reinforced Adhesive." Journal of Nanomaterials 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/158503.

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Adhesives on the basis of urea-formaldehyde (UF) and melamine-urea-formaldehyde (MUF) are extensively used in the production of wood-based panels. In the present study, the attempt was made to improve the mechanical board properties by reinforcing these adhesives with cellulose nanofibers (CNFs). The latter were produced from dissolving grade beech pulp by a mechanical homogenization process. Adhesive mixtures with a CNF content of 0, 1, and 3 wt% based on solid resin were prepared by mixing an aqueous CNF suspension with UF and MUF adhesives. Laboratory-scale particle boards and oriented stra
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Dissertations / Theses on the topic "UF adhesive"

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Zhao, Lee Cheng. "Cell adhesion characterization of adhesive forces and effect of topography /." [Gainesville, Fla.] : University of Florida, 2000. http://etd.fcla.edu/etd/uf/2000/ana7043/LCZhao%5FThesis.pdf.

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Thesis (M.S.)--University of Florida, 2000.<br>Title from first page of PDF file. Document formatted into pages; contains ix, 79 p.; also contains graphics. Vita. Includes bibliographical references (p. 69-77).
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Scott, Keith Alan. "Economic Feasibility of Implementing a Resin Distribution Measurement System for MDF Fiber." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/31835.

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There have been successful techniques developed to measure resin distribution of phenol-formaldehyde adhesive on several types of wood surfaces. However, a technique that quantitatively measures UF resin on wood surfaces has been a problem because UF resin is colorless on wood fiber. The first objective of this study was to develop a technique to quantitatively measure surface area coverage and statistical distribution of urea-formaldehyde (UF) resin on medium density fiberboard (MDF) fiber. Two techniques were evaluated to quantitatively measure UF resin. One technique treated the resinat
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Jeremejeff, Joakim. "Investigation of UF-resins - the Effect of the Formaldehyde/Urea Molar Ratio during Synthesis." Thesis, KTH, Skolan för kemivetenskap (CHE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146204.

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In this project, urea-formaldehyde (UF) resins were produced and investigated. UF resins are commonly used indoors as wood adhesives in, e.g. particle boards, in different furniture applications and flooring. UF resins are produced by alternating methylolation and condensation reactions, thus reacting urea and formaldehyde with each other and creating longer polymeric chains. The number of alternations, i.e. number of condensation reactions can be varied. The focus laid on the effect of the formaldehyde/urea molar ratio during synthesis. This includes the effect of the molar ratio on both the
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Book chapters on the topic "UF adhesive"

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Hasan Faris, Abbas. "Fillers in Wood Adhesives." In Fillers. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.92150.

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The introduction of a second component to polymers has been presented; this component is often used to modify the characteristics of the products and to acquire new polymer materials with improved properties. Composite materials have a pivotal role in industries that are now considered the most progressive worldwide. At present, synthetic adhesives based on formaldehyde such as phenol-formaldehyde (PF), urea formaldehyde (UF), and melamine formaldehyde (MF) are predominantly used for wood composite production, and these adhesives are commonly used in the wood panel industry. These adhesives ha
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Conference papers on the topic "UF adhesive"

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Wang, Chung-Ting, Chih-Pin Hung, Chang-Chi Lee, et al. "Atomistic simulation analysis for influence of organic PA types on PA/UF adhesion in 2.5D IC package." In 2014 9th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT). IEEE, 2014. http://dx.doi.org/10.1109/impact.2014.7048419.

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