最新刊期
期 1 ， 2021
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摘要：Based on the records in the Web of Science database, this study used bibliometrics methods to assess the development trends of wood science research in China and the world from 2010 to 2019. The paper analyzes the number of researches, academic impacts, highly cited articles, international collaboration, and disciplinaries in wood science. The study compares the academic strengths of China with the developed countries in the world, revealing the development trend and competitive strength of China's wood science research in the international stage. It provides references to the policy making and administration for the future scientific research plan and development in China.关键词：wood science;discipline evaluation;international collaboration;development strategy;situation analysis- 694
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- 53
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发布时间：2021-02-01 -
摘要：Nail-laminated timber (NLT) is one kind of mass timber/panel products. It has been used as load carrying members such as bridge decks, floors, roofs, walls, etc., for more than a century in Europe and North America. Application of NLT has undergone resurgence as part of the global modern mass timber movement in the building industry. Having only been introduced into China recently, there is a shortage of research works and application experiences. The characteristics, code provisions and research status related to NLT were comprehensively summarized in this paper. The confronted problems were analyzed and the future research topics were recommended. This work presents a basis for the application of NLT in China.关键词：nail-laminated timber;engineered wood;mass timber structure- 167
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- 30
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发布时间：2021-02-01
Reviews
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摘要：Digital design is crucial to intelligent manufacturing. Based on the summary of the history of digital design in the furnishing industry of China, this paper analyzed the fundamental status, investigated the essential problems that needed to be solved, then presented a framework of the key technologies of digital design for intelligent manufacturing furnishing products. The key technologies include: the construction of the digital design technology platform, the construction of digital product models, the data interaction and processing of digital design , the integration of digital design, splitting order and processing, and digital display of household products. This article aims to provide a reference for the transformation and upgrading digital intelligent manufacturing of domestic furnishing products.关键词：intelligent manufacturing;digital design;furnishing products;key technology- 237
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- 79
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发布时间：2021-02-01
Special Reports I
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摘要：In this research, the dynamic vapor adsorption system with a GAB model was used to analyze the isothermal hygroscopic characteristics of the microwave treated Mongolian scotch pine (Pinus sylvestris var. mongolica Litv.) wood. The results showed that the GAB model described the isotherm moisture absorption process of microwave treated wood well; microwave treatment did not change the isotherm moisture absorption curve line shape. After a microwave treatment, the equilibrium moisture content decreased; the monolayer saturation adsorption and the effective specific surface area decreased. The decreased degree was significant when the initial moisture content was low and/or the microwave power density was high. It was indicated that a microwave treatment reduced the moisture absorption property of Mongolian scotch pine wood effectively. Under the condition of low initial moisture content or high microwave power density, the change of equilibrium moisture content was larger, and the decrease of equilibrium moisture content of early wood was greater than that of late wood, which indicated that microwave treatment had more influence on early wood cell wall.关键词：microwave treated wood;Mongolian scotch pine（Pinus sylvestris var. mongolica Litv.）;sorption isotherms;GAB model;specific surface area- 156
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- 15
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发布时间：2021-02-01
Special Reports II
- 摘要：The physical and mechanical properties of Acacia melanoxylon wood were analyzed and evaluated in order to provide reference data for optimal production and efficient utilization. The results showed that the density of the wood was classified as the medium grade, and the volumetric shrinkage coefficient was very small grade. The main mechanical properties of the wood were all in the middle and upper grade levels. The comprehensive strength of the wood was 166.8 MPa, which was classified as the very high grade. The comprehensive quality coefficient of the wood was 320.2, which was classified as the very high grade.关键词：Acacia melanoxylon;physical property;mechanical property
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- 17
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发布时间：2021-02-01
Special Reports III
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摘要：In order to improve the hydrophobic property of wood surfaces, epoxidized linseed oil and carnauba wax were used to prepare a compound emulsion to impregnate Poplar (Populus cathayana Rehd.) samples at atmospheric pressure. The effects of ratio of oil to wax and surfactant hydrophile-lipophile balance (HLB) value on the stability and particle size of compound emulsion were investigated; the hydrophobicity of wood was evaluated simultaneously. The results showed that when the HLB value was 17.0 and epoxidized linseed oil to carnauba wax ratio was 3: 7, average particle size was 223.5 nm and centrifugal stability reached level 1. The contact angles on both cross and tangential sections of treated wood after 30 s reached 119.2° and 105.8° respectively; the leaching rate was 6.1%, which displayed significant improvement of the surface hydrophobic property of wood.关键词：wood surface hydrophobic;epoxidized linseed oil;carnauba wax;compound emulsion;centrifugal stability;leaching resistance- 95
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- 19
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发布时间：2021-02-01 -
摘要：In this study, the straight tenon-type edge joint was selected, which was the common typical joint in chuan-dou style timber structure of southwestern residential buildings in China. The reinforcement schemes were adopted, which including wood-pin and steel-pin. And the influence of two reinforcement methods on the seismic resistance of straight joints was compared, through the monotonic loading and low-cycle reversed loading full-scale tests. The results showed that the damage degree of the two reinforced joints were reduced, and could effectively inhibit the tenon pulling occurrences, compared with the unreinforced joints. Using wood-pin and steel-pin reinforcement, the initial stiffness of the joints was increased by 50% and 75%, the yield bending moment was increased by 45% and 73%, the moment-resisting capacity was increased by 27% and 69%, and the dissipated energy was increased by 200% and 69%, respectively. In conclusion, both methods effectively improved the seismic performance of mortise-tenon joints in chuan-dou style timber structure.关键词：Chuan-dou style timber structure;mortise-tenon joints;reinforcement;seismic performance- 102
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- 12
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发布时间：2021-02-01 -
摘要：The compressive strength of cross-laminated timber made by Chinese larch was tested based on the standard of GB/T 50329—2012 on testing methods for timber structures. The weakest-link theory was used to analyze size effects of CLT 's compression strength parallel to the grain. The nonparametric statistics method was used to estimate the coefficient of the size effect. The result showed that the compression strength decreases with the increase of either the length or the width. And there is a significant linear relation between the coefficient of the length effect SL and different percentiles; the coefficient of the width effect SW was 0.349; there is no significant relation between the thickness and the compression strength parallel to the grain.关键词：cross-laminated timber;compression strength parallel to grain;size effect- 118
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- 9
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发布时间：2021-02-01 -
摘要：In the present study, effects of finger joint parameters including finger types, finger tenon parameters (type I, II, and III), and fitness ratios on the performance of finger-jointed dimensional bamboo lumber were explored respectively. Results indicated that the mechanical properties of finger-jointed dimensional bamboo lumber in the verticality (V) finger tenon were better than that with the horizontal (H) tenon. In the V finger tenon, type Ⅱ with 0.1 mm fitness ratio was the best finger joint parameter for dimensional bamboo lumber. Compared with the performance of non-finger-jointed dimensional bamboo lumber, bending and tensile properties of finger-jointed dimensional bamboo lumber performed well, which met the physical property requirements of machine-graded panels of ME16 grade and the highest grade of ME18 in GB/T 26899—2011. In conclusion, finger-jointed dimensional bamboo lumber has a good application potential in structural materials.关键词：bamboo flattened sheet;finger joint types;toothed tenon parameters;dimensional bamboo lumber;finger-joint;mechanical properties- 35
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发布时间：2021-02-01 - 摘要：In order to develop a new type of wood material mold inhibitor, citric acid, salicylic acid and cinnamaldehyde were used as antibacterial components to prepare single and compound mold inhibitor. The mold resistant properties of the single or compound mold inhibitor treated Wheat straw board and Populus tomentosa were compared, and then the formulation of the mold inhibitor was optimized. The results showed that cinnamaldehyde had the best mold resistance effect among the three single organic acids mold inhibitor. The mold resistance of compound mold inhibitor treated wheat straw board was the best when 16.67 mg/mL cinnamaldehyde, 26.67 mg/mL citric acid and 6.67 mg/mL salicylic acid were used. The mold resistance of compound mold inhibitor treated Populus tomentosa was the best when concentrations of cinnamaldehyde, citric acid and salicylic acid were 26.67 mg/mL. The use of cinnamaldehyde, citric acid, and salicylic acid compound mold inhibitor can reduce the use of cinnamaldehyde and save costs while ensuring the mold resistance effect.关键词：organic acid;complex formulation;wood materials;mold inhibitor;mold resistant properties
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- 8
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发布时间：2021-02-01 -
摘要：The emissions from medium density fiberboard (MDF) continuous press were analyzed and characterized through linearly emission, high temperature and 2-phase mixture. The abatement system was presented as composing of gas collecting, quenching, primary separation and secondary control units. The single-stage abatement system was suggested for the domestic hot-press system.关键词：MDF;hot-press emissions;dust;formaldehyde;abatement technology- 89
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- 25
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发布时间：2021-02-01
Research Papers
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摘要：The innovation of flattened bamboo boards enriches the variety of bamboo-based products and promotes the development of bamboo-based decorative materials. The bamboo laminated lumber and the bamboo square timber are made with flattened bamboo boards. The timbers can be further sliced into bamboo veneers, and laminated with non-woven fabric (paper) to fabricate a flattened bamboo veneer product with a large dimension. The practice in the industrial production has proved the feasibility of the technological process, which is a novel method for the value-added processing of bamboo resources.关键词：flattened bamboo boards;flattened bamboo sliced veneer;production technology- 83
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- 18
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发布时间：2021-02-01 -
摘要：In order to recover the secondary steam after veneer drying, based on the Venturi principle, a veneer drying steam recycling system was developed. Through research on the working fluid flow, the ejector steam flow rate, the nozzle diameter, and the relationship between the diameter of mixing chamber, by applying the digital design technology, a key component–the ejector of the steam recycling system was designed and constructed. The system successfully completes the secondary steam recycling by condensing steam, returning the condensed water to the recycling tank, and then back to the boiler at a low back pressure condition. The pilot operation demonstrated that the recycling system is easy and stable to conduct, while it efficiently achieves the targets of energy saving and emission reduction.关键词：veneer drying;steam recycling;nozzle;Venturi- 47
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- 7
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发布时间：2021-02-01 -
摘要：This research project investigated the volatile organic compounds (VOCs) released from furniture components using the sampling bag method. The influence of the time of which furniture components are placed in sampling bags, the volume of sampling bags, and the loading rate on their VOCs release was studied. The optimal testing conditions of the air bag method are obtained: at the bearing capacity of furniture components of 5~10 m2/m3, the furniture components are placed in the appropriate size of sampling bags accordingly. High purity nitrogen was flushed into the sampling bag at the volume ratio of 1/2~2/3 to the total volume of the air bag. After 60 minutes, air samples from the sampling bag were taken and analyzed. Compared with the standard environmental chamber detection method, this method is conducted at a low detection cost and a short detection time, with a strong flexibility. This method is suitable for measuring VOCs during the manufacturing process and in marketplaces in the furniture industry.关键词：sampling bag method;furniture components;rapid detection;VOCs- 52
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- 7
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发布时间：2021-02-01
Applied Technology
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摘要：In this study, the current status and existing issues of wood industry consortium standardization were summarized and analyzed. The recommendations was provided for future development of the wood industry consortium standardization.关键词：wood industry;consortium standardization- 96
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- 17
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发布时间：2021-02-01
Discussion on Standards
- Address：Box 29，Research Institute of Wood Industry, No. 1, Dongxiaofu, Haidian District, Beijing Postal code：100091
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