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Journal of Renewable Materials 2024年第8期12卷 1355-1368页

作者： Ming Ni Lei Li Yiqiang Wu Jianzheng Qiao Yan Qing Ping Li Yingfeng Zuo College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China College of Furniture and Art Design Central South University of Forestry and TechnologyChangsha410004China

Furfurylated wood exhibits excellent dimensional stability and corrosion resistance,making it a promising material for constructing buildings,but it is highly ***,flame-retardant furfurylated poplar wood was produced via a two-step process utilizing boric acid(BA)and ammonium dihydrogen phosphate(ADP)as flame-retardant components,and biomass-derived furfuryl alcohol(FA)as a *** acidity of BA and ADP allowed them to catalyze the polymerization of FA,which formed a cross-linked network that immobilized BA and ADP inside the *** addition of BA/ADP substantially delayed the time to ignition from 10 to 385 s and reduced the total heat release and total smoke release by 58.75%and 77.31%,*** of the pyrolysis process showed that the decomposition products of BA and ADP protected the underlying furfurylated wood and diluted combustible *** method significantly improved the fire retardancy and smokeless properties of furfurylated wood,providing promising prospects for its application as an engineering material.

关键词： poplar wood furfuryl alcohol furfurylated wood flame retardancy boric acid ammonium dihydrogen phosphate

Use of amino silane coupling agent to improve physical and mechanical properties of UF-bonded wheat straw(Triticum aestivum L.) poplar wood particleboard

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Journal of Forestry Research 2016年第2期27卷 427-431页

作者： Seyedeh Masoumeh Hafezi Aliakbar Enayati Kazem Doost Hosseini Asghar Tarmian Sayed Ahmad Mirshokraii Department of wood and Paper Sciecne & Technology Faculty of Natural Resources University of Tehran Chemistry Department Payame Nour University

We evaluated the potential use of amino silane coupling agent （SiNH） to improve physical and mechanical properties of UF-bonded wheat straw （Triticurn aestivum L.） poplar wood particleboard. We examined the effects of varied content of silane coupling agent content and ratios of straw to poplar wood particles on particleboard prop- erties. The ratios of straw to poplar wood particles were 100：0, 85：15, 70：30 and 55：45. Silane coupling agent content was tested at three levels, 0, 5 and 10 %. The experimental panels were tested for their mechanical strength, including modulus of elasticity （MOE）, modulus of rupture （MOR）, intemal bonding （IB） and physical properties according to procedures specified in DIN 68763 （Chipboard for special purposes in building construction： concepts, requirements, testing, 1982-03, 1982）. All board properties were improved by the addition of silane cou- pling agent. The use of poplar wood particles had a positive effect on the mechanical properties of wheat straw parti- cleboard but had a negative effect on physical properties （thickness swelling and water absorption）.

关键词： Wheat straw particleboard poplar wood UFresin Silane coupling age

Comparative Study on the Properties of Inorganic Silicate and Organic Phenolic Prepolymer Modified poplar wood by Vacuum Cycle Pressurization

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Journal of Renewable Materials 2022年第9期10卷 2451-2463页

作者： Pengfei Guan Ping Li Yiqiang Wu Xingong Li Guangming Yuan Yingfeng Zuo College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China College of Furniture and Art Design Central South University of Forestry and TechnologyChangsha410004China

To enhance mechanical properties and improve flame retardancy and smoke suppression of fast-growing poplar wood in wood applications,the wood was impregnated and *** organic phenolic prepolymer and inorganic sodium silicate was used as contrasting impregnation modifiers and wood samples were impregnated by a bionic“respiration”method with alternating positive and negative *** weight percentage gain,density increase ratio,mechanical properties(bending and compressive strength and hardness),and water absorption rate of inorganic and organic-impregnated modified poplar wood(IIMPW and OIMPW,respectively)were compared and these properties in IIMPW were found to be higher than those of OIMPW with the exception of the water absorption rate which was lower than the *** was attributed to the superior absorption of sodium silicate that also improved the impregnation,reinforcement,and dimensional stability in the *** chemical structure,crystalline structure,internal morphology,flame retardancy,smoke suppression,and thermal stability of IIMPW and OIMPW were characterized by FT-IR,XRD,SEM,CONE,and ***-IR and XRD results showed that,although IIMPW cellulose crystallinity reduced the most,more chemical bonds were come into being in IIMPW,which explained the better physical and mechanical properties of *** with OIMPW,IIMPW had better flame retardant and smoke suppression performance.

关键词： poplar wood sodium silicate impregnation modification mechanical properties dimensional stability flame retardancy and smoke suppression

The influence of silane coupling agent and poplar particles on the wettability, surface roughness, and hardness of UF-bonded wheat straw(Triticum aestivum L.)/poplar wood particleboard

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Journal of Forestry Research 2014年第3期25卷 667-670页

作者： Seyedeh Masoumeh Hafezi Kazem Doosthoseini Department of wood and Paper Sciences and Technology Faculty of Natural Resources University of Tehran

We used silane coupling agents to improve the bonding ability between wheat straw particles and UF resin, and investigated surface properties （wettability and surface roughness） and hardness of parti-cleboard made from UF-bonded wheat straw （Triticum aestivum L.） combined with poplar wood as affected by silane coupling agent content and straw/poplar wood particle ratios. We manufactured one-layered particleboard panels at four different ratios of straw to poplar wood par-ticles （0%, 15%, 30% and 45% wheat straw） and silane coupling agent content at three levels of 0, 5% and 10%. Roughness measurements, average roughness （Ra）, mean peak-to-valley height （Rz）, and root mean square roughness （Rq） were measured on unsanded samples by using a fine stylus tracing technique. We obtained contact angle measurements by using a goniometer connected to a digital camera and computer sys-tem. Boards containing greater amounts of poplar particles had superior hardness compared to control samples and had lower wettability. Panels made with higher amounts of silane had lower Rq values.

关键词： wheat straw particleboard poplar wood surface properties,wettability silane coupling agent hardness

Kinetics and FTIR characteristics of the pyrolysis process of poplar wood

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Forestry Studies in China 2013年第1期15卷 70-75页

作者： Wen-Liang WANG Xue-Yong REN Yan-Zhe CHE Jian-Min CHANG Jin-Sheng GOU College of Materials Science and Technology Beijing Forestry University

The pyrolysis characteristics of residues of poplar （Populus sp.） wood were investigated using a thermogravimetric analyzer coupled with a Fourier transform infrared （TG-FTIR） spectrometer. The pyrolysis process was sub- divided into four stages at a rate of 10℃.min-1, varying from 30 to 650℃. Below 180℃, a mass loss occurred for drying and preheating the sample and the onset temperature of pyrolysis ranged between 180-260℃. A significant mass loss 3f 61.4 wt.% occurred between 260-380℃, followed by a slow and continuous mass change with lignin devolatilization. The analysis of kinetic reactions showed that the activation energy （78.29 ***-1） in the low-temperature section was much larger than that （6.40 kJ-mol-1） in the high-temperature section. The evolved gases formed by thermal degradation 3f poplar wood were simultaneously analyzed by FTIR. It was observed from the main peaks that the emissions evolved during poplar wood pyrolysis were acetic acid, carbon dioxide, carbon monoxide, methane, water, some volatile com- 3ounds of esters, alcohols and aldehydes. The emissions gradually increased with rising temperatures before a strong 3eak around 360℃ and then decreased. Most gaseous products were emitted in the 320-380℃ range, while CO2 was =ontinuously emitted in a wide range from 140-550℃.

关键词： poplar wood pyrolysis TG-FTIR kinetics characteristics

A model of supplying poplar wood for Iranian paper & wood factories

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Journal of Forestry Research 2008年第4期19卷 323-328页

作者： Majid Azizi wood & Paper sciences and technology department Faculty of Natural ResourcesUniversity of Tehran

The objective of this research is to design a method for an appropriate alternative to supply poplar wood as raw material for wood and paper factories in Iran. Due to the destruction of the forests and lack of proper plantation, replacement of the forest wood by the fast growing wood is vital to satisfy all requirements of these factories. A hierarchy was used to prioritize benefits, opportunities, costs and risks （BOCR） using the Analytic Hierarchy Process （AHP） ratings approach. To evaluate the ＂control criteria＂ of the system, a control hierarchy was also created and prioritized by applying the Analytic Network Process （ANP）. A total of four major control criteria in the system are prioritized where each one controls a network structure evaluated by using ANE The final synthesis results of the system showed that internal poplar tree farming supplied by the forest product factories was the best choice among three potential alternatives （factory procurement, external procurement and mix procurement）.

关键词： poplar wood wood and paper industries BOCR (Benefits, Opportunities, Costs and Risks) ANP (Analytic Network Process) AHP (Analytic Hierarchy Process)

Structural Changes of poplar wood Lignin in Hydrothermal pretreatment in Acetic Acid-Sodium Acetate system

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Journal of Bioresources and Bioproducts 2017年第4期2卷 158-162页

作者： Quanshui Yu Yingjuan Fu Zhiyong Shao Fengshan Zhang Menghua Qin Key Laboratory of Pulp&Paper Science and Technology of the Ministry of Education Qilu University of TechnologyJinan 250353ShandongChina Huatai Group Corp.Ltd. DongyingShandong257335China Organic Chemistry Laboratory Taishan UniversityTaian 271021ShandongChina

Hydrothermal pretreatment of poplar wood chips was performed in an acetic acid/sodium acetate buffer *** characterize the structural changes of lignin in the pretreatment process,milled wood lignin(MWL)was isolated from both the un-treated and treated poplar wood chips,and analyzed by ^(1)H-NMR,^(13)C-NMR,^(31)P-NMR,FT-IR,and *** showed that the lignin in the pretreated wood chips had more phenolic OH groups,less aliphatic OH groups,higher molecular weight,and narrower polydispersity,in comparison with the lignin in the un-treated *** acetic acid-sodium acetate buffer pretreatment facilitated the removal of-OCH_(3) groups and the cleavage of the inter-unit linkages ofβ-O-4 bond in the ***,the re-polymerization of lignin in the acetic acid-sodium acetate buffer pretreatment was found to be less than that in autohydrolysis.

关键词： poplar wood Acetic acid/sodium acetate buffer pretreatment Lignin structure Repolymerization reaction

Importance of oxygen-containing functionalities and pore structures of biochar in catalyzing pyrolysis of homologous poplar

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Chinese Journal of Chemical Engineering 2024年第1期65卷 200-211页

作者： Li Qiu Chao Li Shu Zhang Shuang Wang Bin Li Zhenhua Cui Yonggui Tang Obid Tursunov Xun Hu School of Material Science and Engineering University of JinanJinan 250022China Joint International Research Laboratory of Biomass Energy and Materials College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China Shandong BASAN Graphite New Material Plant Zibo 255311China Department of Power Supply and Renewable Energy Sources National Research University TIIAMETashkent 100000Uzbekistan

Biochar and bio-oil are produced simultaneously in one pyrolysis process,and they inevitably contact and may interact,influencing the composition of bio-oil and modifying the structure of *** this sense,biochar is an inherent catalyst for *** this study,in order to investigate the influence of functionalities and pore structures of biochar on its capability for catalyzing the conversion of homologous volatiles in bio-oil,three char catalysts(600C,800C,and 800AC)produced via pyrolysis of poplar wood at 600 or 800℃or activated at 800℃,were used for catalyzing pyrolysis of homologous poplar wood at 600℃,*** results indicated that the 600C catalyst was more active than 800C and 800AC for catalyzing cracking of volatiles to form more gas(yield increase by 40.2%)and aromatization of volatiles to form more light or heavy phenolics,due to its abundant oxygen-containing functionalities acting as active *** developed pores of the 800AC showed no such catalytic effect but could trap some volatiles and allow their further conversion via sufficient ***,the interaction with the volatiles consumed oxygen on 600C(decrease by 50%),enhancing the aromatic degree and increasing thermal *** dominance of deposition of carbonaceous material of a very aromatic nature over 800C and 800AC resulted in net weight gain and blocked micropores but formed additional *** in situ diffuse reflectance infrared Fourier transform spectroscopy characterization of the catalytic pyrolysis indicated superior activity of 600C for removal of -OH,while conversion of the intermediates bearing C=O was enhanced over all the char catalysts.

关键词： poplar wood Catalytic pyrolysis Char catalyst Volatile-char interaction Bio-oil

Computer Simulation of Fiber Length and Width Distribution for Two poplar woods

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Chinese Forestry Science and Technology 2004年第2期3卷 49-54页

作者： ZHANGDongmei HOUZhuqiang GUANNing ShanghaiLandscapeGardeningResearchInstitute 899LongwuRdShanghai200232P.R.China ResearchInstituteofwoodIndustry ChineseAcademyofForestryBeijing100091P.R.China

Computer simulation was carried out on fiber length and width for plantation-grown Chinesewhite poplar (Populus tomentosa Carr. clone) and plantation-grown poplar I-72 (P. x eurumericana (Dode)Guiner cv.). Skewness and kurtosis of measured results exhibited that distributions of the fiber length andwidth departured from normal distribution. Three-parameter Weibull density function was used in thisinvestigation and the corresponding program was written with Turbo C. The results showed that profiles ofsimulated length and width histograms were similar to ones of measured histograms, and that there was apretty good agreement between simulated and measured means of fiber length and width. There was a littleinfluence on the simulated means from seed used in random number generator and number of simulatedvariables. That indicated that the simulation was steady when the seed and the number were altered. Differenthistograms can be obtained with different values of the location, the shape, and the scale parameter correspondingto different values of the minimum, the mean, and the standard deviation for fiber length and width. Thesimulation presented here can be used as a tool for the studies on the variations in fiber morphology.

关键词： poplar wood fiber sampling simulation Weibull distribution Skewness Kurtosis

Selecting the Technology of Sodium Silicate Modified poplar with the Highest Performance by Fuzzy Orthogonal Method

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Journal of Renewable Materials 2023年第5期11卷 2399-2415页

作者： Xiaoqian Bi Pengfei Guan Ping Li Yuan Zhang Xingong Li Yingfeng Zuo College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China College of Furniture and Art Design Central South University of Forestry and TechnologyChangsha410004China

Sodium silicate modification can improve the overall performance of *** modification process has a great influence on the properties of modified *** this study,a new method was introduced to analyze the wood modification process,and the properties of modified wood were *** wood was modified with sodium silicate by vacuum-pressure *** screening using single-factor experiments,an orthogonal experiment was carried out with solution concentration,impregnation time,impregnation pressure,and the cycle times as experimental *** modified poplar with the best properties was selected by fuzzy mathematics and characterized by SEM,FT-IR,XRD and *** results showed that some lignin and hemicellulose were removed from the wood due to the alkaline action of sodium silicate,and the orderly crystal area of poplar became disorderly,resulting in the reduction of crystallinity of the modified poplar ***-IR analysis showed that sodium silicate was hydrolyzed to form polysilicic acid in wood,and structural analysis revealed the formation of Si-O-Si and Si-O-C,indicating that sodium silicate reacted with fibers on the wood cell ***-DTG curves showed that the final residual mass of modified poplar wood increased from 25%to 67%,and the temperature of the maximum loss rate decreased from 343℃ to 276℃.The heat release and smoke release of modified poplar wood decreased *** kind of material with high strength and fire resistance can be used in the outdoor building and indoor furniture.

关键词： poplar wood sodium silicate impregnation modification fuzzy orthogonal method process optimization flame retardant