This article presents research focused on developing and scientifically substantiating a technology for producing environmentally friendly glued structures fromwood treated through a two-stage process.Themethodology i...This article presents research focused on developing and scientifically substantiating a technology for producing environmentally friendly glued structures fromwood treated through a two-stage process.Themethodology involves preliminary thermal modification followed by high-frequency low-temperature plasma treatment.Thermal modification enhances performance characteristics such as resistance to rot,lowers hygroscopicity,and increases dimensional stability.However,it can diminish the adhesive properties of wood,complicating the bonding process.To address this challenge,the study introduces high-frequency low-temperature plasma treatment,which activates the wood surface,improving wettability and adhesion while minimizing glue consumption.Experimental results indicate that plasma treatment reduces the contact angle by 46%and adhesive consumption during bonding by 24%,thereby enhancing the environmental friendliness of the glued structures.Furthermore,this dual treatment process increases the shear strength of adhesive joints by 22.7%and bending strength of glued beams by 66.6%,demonstrating a 30%lower carbon footprint compared to conventional methods.The findings affirm the efficacy of this technology in producing building materials,particularly glued beams for large-span structures.展开更多
The use of wood-polymer composites(WPC)based on a polymer matrix and wood filler is a modern,environmentally friendly direction in material science.However,untreated wood filler exhibits poor adhesion to hydrophobic p...The use of wood-polymer composites(WPC)based on a polymer matrix and wood filler is a modern,environmentally friendly direction in material science.However,untreated wood filler exhibits poor adhesion to hydrophobic polymers due to its hydrophilic lignocellulose fibers.To address this,ozone treatment is employed to enhance compatibility,reduce water absorption,and regulate biodegradation rates.This study investigates the hypothesis that ozone modification of wood filler improves adhesion to thermoplastic starch,thereby enhancing the physico-mechanical properties and controlled biodegradation of WPCs under compost conditions.A compre-hensive analysis was conducted on composites containing untreated and ozonated wood flour,focusing on tensile strength,bending resistance,impact strength,and biodegradation kinetics.Results showed significant improvements in mechanical properties for modified composites:tensile strength increased by 20%-25%,bending resistance by 15%-30%,and impact strength by 15%-20% compared to untreated samples.The optimal composition identified contained 70% ozonated wood flour and 30% thermoplastic starch(70WF/30P),demonstrating excellent mechanical strength(flexural strength of 18-22MPa),complete biodegradation within 140 days,and operational stability.The study revealed correlations between surface modification,interphase interaction,and biodegradation kinetics,advancing fundamental knowledge of lignocellulosic filler modification methods.These findings are crucial for developing eco-friendly composite materials with applications in biodegradable packaging and agricultural products,offering both scientific insights and practical solutions for sustainable material development.展开更多
基金funded by the Technostart competition,Agreement No.12-22(2-22)dated 01 February 2022.
文摘This article presents research focused on developing and scientifically substantiating a technology for producing environmentally friendly glued structures fromwood treated through a two-stage process.Themethodology involves preliminary thermal modification followed by high-frequency low-temperature plasma treatment.Thermal modification enhances performance characteristics such as resistance to rot,lowers hygroscopicity,and increases dimensional stability.However,it can diminish the adhesive properties of wood,complicating the bonding process.To address this challenge,the study introduces high-frequency low-temperature plasma treatment,which activates the wood surface,improving wettability and adhesion while minimizing glue consumption.Experimental results indicate that plasma treatment reduces the contact angle by 46%and adhesive consumption during bonding by 24%,thereby enhancing the environmental friendliness of the glued structures.Furthermore,this dual treatment process increases the shear strength of adhesive joints by 22.7%and bending strength of glued beams by 66.6%,demonstrating a 30%lower carbon footprint compared to conventional methods.The findings affirm the efficacy of this technology in producing building materials,particularly glued beams for large-span structures.
基金funded by the Foundation for Assistance to Innovations,under the“Student Startup”competition(agreement No.3075ΓCCC15-L/99398 dated 03 October 2024).
文摘The use of wood-polymer composites(WPC)based on a polymer matrix and wood filler is a modern,environmentally friendly direction in material science.However,untreated wood filler exhibits poor adhesion to hydrophobic polymers due to its hydrophilic lignocellulose fibers.To address this,ozone treatment is employed to enhance compatibility,reduce water absorption,and regulate biodegradation rates.This study investigates the hypothesis that ozone modification of wood filler improves adhesion to thermoplastic starch,thereby enhancing the physico-mechanical properties and controlled biodegradation of WPCs under compost conditions.A compre-hensive analysis was conducted on composites containing untreated and ozonated wood flour,focusing on tensile strength,bending resistance,impact strength,and biodegradation kinetics.Results showed significant improvements in mechanical properties for modified composites:tensile strength increased by 20%-25%,bending resistance by 15%-30%,and impact strength by 15%-20% compared to untreated samples.The optimal composition identified contained 70% ozonated wood flour and 30% thermoplastic starch(70WF/30P),demonstrating excellent mechanical strength(flexural strength of 18-22MPa),complete biodegradation within 140 days,and operational stability.The study revealed correlations between surface modification,interphase interaction,and biodegradation kinetics,advancing fundamental knowledge of lignocellulosic filler modification methods.These findings are crucial for developing eco-friendly composite materials with applications in biodegradable packaging and agricultural products,offering both scientific insights and practical solutions for sustainable material development.
