Article
Polymer Science
Liang Chang, Yuanwu Wang, Xueqi Chen, Yiping Ren, Xiaoxi Luo
Summary: The effect of grafting conditions on the surface properties of silane-treated veneer was analyzed by treating poplar veneer with silane coupling agents under different heating conditions. The results showed that heating conditions were necessary for the conversion of physically adsorbed silanols into covalent -Si-O-C- bonds, improving bonding strength. The tensile shear strength of plywood reached 1.03 MPa when the veneer was grafted at 120℃ for 90 min, meeting outdoor material requirements. Enhanced interlock and improved thermal stability were observed under the optimal grafting condition.
Article
Polymer Science
L. Zare, A. Arefazar, O. Moini Jazani
Summary: The increase in SEBS-g-MA concentration and decrease in SBS:SEBS-g-MA weight ratio improved the dispersion of PBT domains in the blend, leading to enhanced mechanical properties such as Young's modulus, yield stress, tensile strength, and tensile ductility. The improvement in mechanical properties was attributed to better blend compatibility and interfacial adhesion as well as a more homogeneous mixing state between blend components.
IRANIAN POLYMER JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
George P. J. Varghese, Deepthi Anna David, Anas Karuth, Jabeen Fatima Manamkeri Jafferali, Sabura P. M. Begum, Jinu Jacob George, Bakhtiyor Rasulev, Prasanth Raghavan
Summary: A novel method for recycling medical face masks has been studied, which involves incorporating nonwoven polypropylene fiber and acrylonitrile butadiene rubber to produce a high percentage economy PP-NBR blend. Experimental and simulation studies demonstrate the excellent thermomechanical properties of the blend.
Article
Construction & Building Technology
Ayfer D. Cavdar, Husnu Yel, Sevda B. Torun
Summary: This study investigates the performance of microcrystalline cellulose (MCC) as a reinforcement in cementitious wood particle products. The addition of MCC to wood cement boards improves water absorption, shrinkage, and mechanical properties. The dispersion effect of MCC in the cement matrix is observed under the scanning electron microscope.
JOURNAL OF BUILDING ENGINEERING
(2022)
Review
Chemistry, Multidisciplinary
Mark Schubert, Guido Panzarasa, Ingo Burgert
Summary: Wood, as a renewable resource, has excellent qualities and has the potential to play a key role in the future bioeconomy. The increasing environmental awareness and drive for sustainability are leading to a resurgence of research on wood materials. However, global climate change will soon pose challenges to the wood-value chains in different regions. This review addresses the natural diversity of wood and discusses the need for new wood processing techniques and green chemistry protocols to manage a more diverse wood provision in the future.
Article
Polymer Science
Xunan Hou, Xuehong Lu, Chaobin He
Summary: The addition of PMMA to PLLA/PHB blends transforms the morphology of the blends by forming an interfacial nanolayer, leading to significantly increased elongation and toughness while maintaining high stiffness and strength. This generic strategy can be applied to design other mechanically robust biocomposites for advanced green devices.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Forestry
Feiyu Ouyang, Wei Wang
Summary: This paper utilizes molecular dynamics simulation to construct a water and cellulose model and investigate the behavior characteristics of cellulose in thermo-hydro-mechanical treatment. The results indicate that pressure has a significant impact on the mechanical properties of cellulose, primarily due to the formation of hydrogen bonds.
Article
Engineering, Chemical
Antimo Graziano, Otavio Augusto Titton Dias, Bruno Sena Maia, Jinlei Li
Summary: This study demonstrates the effectiveness of using MAPE to compatibilize PE-rich blends with PP as the minor phase, resulting in improved mechanical properties and reduced viscosity mismatch and interfacial tension.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Materials Science, Paper & Wood
Krishna Prasad Kandel, Menuka Adhikari, Madhav Kharel, Girja Mani Aryal, Shiva Pandeya, Mahesh Kumar Joshi, Bipeen Dahal, Bhoj Gautam, Bhanu Bhakta Neupane
Summary: In this research, alkali was extracted from wood ash and used to process lignocellulose fiber obtained from Sterculia villosa. The findings showed that the fiber treated with wood-ash alkali had similar mechanical strength to the fiber treated with sodium hydroxide, indicating that wood-ash alkali treatment could be a low-cost method for processing lignocellulose biomass.
Article
Polymer Science
Majid Mehrabi-Mazidi, Hossein Sharifi
Summary: The addition of impact polypropylene copolymer (IPC) with excellent stiffness-toughness balance into a blend comprising 80% recycled high density polyethylene (rHDPE) and 20% recycled isotactic polypropylene (rPP) improved interfacial interactions, dispersion state, and phase morphology. Mechanical properties such as flexural modulus, flexural strength, tensile strength, and tensile ductility increased steadily with IPC loading, while Izod impact energy showed a monotonous rise. IPC also played a role in compatibilization, toughening, and reinforcing effects in the modified blends, leading to enhanced toughness and fracture resistance.
POLYMER INTERNATIONAL
(2021)
Article
Polymer Science
Maria Jorda-Reolid, Jaume Gomez-Caturla, Juan Ivorra-Martinez, Pablo Marcelo Stefani, Sandra Rojas-Lema, Luis Quiles-Carrillo
Summary: This study developed wood plastic composites based on micronized argan shell as a filler and high-density polyethylene obtained from sugarcane, following the principles of circular economy. Different compatibilizers and additional fillers were used to improve the properties of the composites, resulting in reddish-brown composites with improved stiffness, thermal stability, compatibility, and wettability.
Article
Chemistry, Applied
Fatima Fneich, Julien Ville, Bastien Seantier, Thierry Aubry
Summary: Foams were produced from nanocellulose-based hydrogel precursors through freeze-drying, and the study revealed a strong correlation between the mechanical and thermal properties of the foams and the rheological properties of their hydrogel precursors. The research indicates that tuning the rheological properties of the hydrogel precursors can allow for control over the mechanical and thermal properties of the foams.
CARBOHYDRATE POLYMERS
(2021)
Article
Polymer Science
Mehrad Zakizadeh, Ahmad Arefazar, Mohamad Javadzadeh
Summary: This study investigated the effect of SAN-g-GMA-coSt and GO nanoparticles on PC/SAN blends, focusing on inter-phase behavior, microstructure, thermal, and mechanical properties. Optimized SAN-g-GMA-coSt reduced phase separations and expanded the inter-phase region, while the addition of GO increased residual mass and tensile strength. The results demonstrated the importance of adjusting GMA-grafts and controlling the localization of GO in improving the properties of the blends.
Review
Materials Science, Paper & Wood
Dong Wang, Feng Fu, Lanying Lin
Summary: In this study, FTIR spectroscopy and mechanical analysis were used to monitor wood molecular straining and gain a better understanding of the micromechanical properties of thermally-treated wood. The results showed that as the thermal treatment temperature increased, the degradation of hemicellulose increased and cellulose microfibrils reorientation occurred. The study also found that the toughness of thermally-treated wood decreased or brittleness increased due to the decrease in shear slipping between cellulose microfibrils and the reorientation of microfibrils caused by hemicellulose degradation.
Article
Chemistry, Inorganic & Nuclear
Qi-Feng Gao, Tan-Lin Jiang, Wei-Zhou Li, Deng-Feng Tan, Xiu-Hai Zhang, Jin-Ying Pang, Shu-Hua Zhang
Summary: Two highly stable Zn(II) metal-organic frameworks (MOFs), [Zn2(L)2(HIPA)]n (1) and [Zn9(L)6(BTEC)3(H2O)4 center dot 6H2O]n (2) (L = 3-amino-1H-1,2,4-triazole, HIPA = 5-hydroxyisophthalic acid, BTEC = benzene-1,2,4,5-tetracarboxylic acid), were synthesized using a hydrothermal method. The physicochemical properties of the MOFs were characterized, and their stability was confirmed under heating. The MOFs were then used as catalysts in a grafting reaction, showing higher grafting efficiency compared to other catalysts.
INORGANIC CHEMISTRY
(2023)
