WOOD SCIENCE AND TECHNOLOGY
·
2012
·Vol. 47
·期 3
·601-613
·
IF 1.727
Si Hongyan,Li Bin,Wang Ting,Lin Li,Xu Zuwei
Poplar wood flour, a low-cost and abundantly available material, was modified by grafting β -cyclodextrin ( β -CD) in the presence of citric acid or 1,2,3,4-Butanetetracarboxylic acid, aiming to expand the application of wood flour. The products were characterized by Fourier transform infrared spectroscopy and the technique of phenolphthalein probe. The grafting conditions of β -CD onto wood flour including curing temperature, β -CD concentration in impregnation solution and catalyst were also evaluated by the technique of phenolphthalein probe. Besides, eugenol (EG), an antibacterial fragrant guest molecule, was loaded on the modified wood flour by lyophilization, and its release characteristics were investigated by Thermo-gravimetric. The results revealed that the modified wood flour material had a thermo-protective effect on the volatilization of EG and the encapsulated EG content was reached to 1.31 %, which could demonstrate a potential application in the finishing and packing areas.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 7
·期 1
·015308
·
IF 1.449
Suwei Wang,Ke Chen,Mingyin Jia,Ping Xue
The polypropylene (PP) and wood flour (WF) were mixed first and then extruded by a single-screw extruder foaming system to prepare the microcellular wood-polymer composites (WPCs) in this article. In addition to PP and WF, polyolefin elastomer (POE), talc powders and other fillers were also added to improve the cell structures of the samples. And two types of PP resins were introduced to the formulation of the composites to study the effect of the molecular chain structure on the rheological properties of the samples. Besides, the effects of processing conditions, such as die temperature and screw speed, on the properties of the samples were also investigated. The experimental results indicate that compared with PP1, the complex viscosity of PP2 decreased faster with the shear rate because of the linear molecular chain structure. Besides, the maximum impact strength of PP2/WF composites was 138.5 % higher than that of PP1/WF composites, while the tensile and flexural strength of PP2/WF composites were much lower. In addition, the best microcellular structure and the maximum impact strength were also obtained with the die temperature of 190 °C and the screw speed of 2 rpm.
研究领域:
材料科学
·
聚合物工程
✓ 已验证
产品关联
DOI
高影响因子
Royal Society Open Science
·
2019
·Vol. 6
·期 1
·
IF 2.515
Yujie Chen,Lili Zhang,Juan Yu,Yingzhao Lu,Bo Jiang,Yimin Fan,Zhiguo Wang
Deep eutectic solvents (DESs) have potential applications in biomass conversion and green chemicals due to their cost-effectiveness and environmentally friendly properties. This study reports on a feasible method of using DESs for lignin selective extraction from poplar wood meal. DESs obtained from various hydrogen-bond donors and acceptors were used to evaluate the dissolving capacity of lignin from poplar wood meal. Among the various DESs, lactic acid: choline chloride (9 : 1) exhibits the optimal extraction capacity, which is capable of selectively dissolving 95% of lignin from poplar wood meal at 120°C for 6 h. The purity of isolated lignin reaches 98% after regeneration in water. From Fourier Transform-IR, nitrobenzene oxidation and nuclear magnetic resonance analysis, the results demonstrate that the DESs can selectively cleave ether linkages and damage the non-condensation section of lignin, thereby facilitating lignin dissolution from wood meal. Thus, this study provides a promising route for the extraction of high-purity lignin from biomass materials.
研究领域:
林学
·
生物质化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2019
·
IF 2.584
Yi Tan,Kaili Wang,Qian Yan,Shifeng Zhang,Jianzhang Li,Yong Ji
An innovative wood flour-based adsorbent for Pb(II) removal was synthesized via a cost-effective and environment-friendly method, which could be high on the priority list owing to its high absorption capacity. By increasing the specific surface and introducing functional groups through delignification and amination, the experimental adsorption capacity of the prepared adsorbent could reach 189.9 mg/g in 180 min (pH = 4, T = 293 K, dosage = 1 g/L, and ion concentration = 300 mg/L). This value is higher than most of those achieved in previous studies on wood-based adsorbents. Pseudo-second-order and Langmuir models were utilized to describe the adsorption kinetics and isotherms, respectively. The effects of solution pH, adsorbent dosage, and temperature on the adsorption efficiency were also evaluated. With a low decrease rate of 20.2% in five cycles, the adsorbent possessed reusability. The adsorbents exhibited high selectivity in the Pb(II), Cu(II), and Zn(II) mixed solution, and the selectivity coefficient k of adsorbents to Pb(II) could reach approximately 2.74 in triad. The method could prompt the development of cost-effective methods for the removal of heavy metals from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2023
·Vol. 13
·期 2
·323
·
IF 3.9
Yu Han,Lijie Xu
In this study, both wood flour (WF) and wood flour-derived biochar (WFB) were used as supports for Fe3O4to activate peroxydisulfate (PDS). The role of different carriers was investigated emphatically from the aspects of catalyst properties, the degradation kinetics of bisphenol A (BPA), the effects of important parameters, and the generation of reactive oxygen species (ROS). Results showed that both WF and WFB could serve as good support for Fe3O4, which could control the release of iron into solution and increase the specific surface areas (SSAs). The WFB/Fe3O4had stronger PDS activation capability than WF/Fe3O4mainly due to the larger SSA of WFB/Fe3O4and the PDS activation ability of WFB. Both radical species (•OH and SO4•−) and non-radical pathways, including1O2and high-valent iron-oxo species, contributed to the degradation of BPA in the WFB/Fe3O4–PDS process. Moreover, the WFB/Fe3O4catalyst also showed stronger ability to control the iron release, better reusability, and higher BPA mineralization efficiency than WF/Fe3O4.Keywords:wood flour;biochar;peroxydisulfate;bisphenol A;Fe3O4;activation
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 7
·1-18
·
IF 2.9
Liu Xiaokai,Li Xilin,Zhao Baiyun,Zhou Lijuan,Wang Li
Salix is an abundant renewable resource with wide sources and low cost. Therefore, a magnetic fiber membrane adsorbent for removing tetracycline (TC) in water was prepared from Salix wood powder. The optimum preparation conditions were discussed, and the optimum initial TC concentration, pH value, adsorption temperature, and adsorption time were determined. In the meantime, the maximum adsorption amount reached 538.73 mg·g −1 . The adsorption process belongs to the multi-molecular layer adsorption with chemical adsorption as the main factor and physical adsorption as the auxiliary factor. The adsorption process is mediated by multiple mechanisms including intramolecular diffusion, electrostatic interaction, hydrogen bonding, and chemical ion exchange, and the adsorbent was easy to separate from water. The results show that the magnetic cellulose membrane is a promising adsorbent which deserves further study. Graphical Abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2024
·
IF 9
Yanbing Li,Jiayue Ma,Rui Pan,Ting Wang
The efficient use of wood powder has become increasingly important for protecting the environment and addressing energy shortages. In this study, a proton exchange membrane electrolysis system was utilized to convert biomass into valuable industrial chemicals and hydrogen using ferric ions as redox mediators , reduced reaction costs. GC-MC analysis revealed that the degradation products are mainly consisted of aromatic carbonyl compounds , along with some alcohols, phenols , and alkanes. The degradation efficiency was found to be 55.6 %, and the Faraday’s hydrogen production efficiency exceeds 92.6 %. Moreover, Fe 3+ /Fe 2+ redox mediators was recycled in the electrolysis system, maintaining high reactivity. This research introduces a new approach for the degradation of wood powder, offering potential for sustainable industrial production and a reduction in environmental impact.
研究领域:
能源与环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Xiang Lu,Bing Liang,Xinxin Sheng,Teng Yuan,Jinping Qu
To improve the use efficiency and broaden the application fields of PCMs in solar thermal energy storage , the poly (ethylene glycol) (PEG) based polyurethane (PU) /wood powder (WP)/graphene oxide (GO) composite shape-stabilized phase change materials (SSPCMs) with high thermal conductivity were successfully designed and prepared by using PEG as the phase change working substance, WP and GO nanosheets as the supporting matrix, and the GO nanosheets as the thermally conductive filler simultaneously. Scanning electron microscopy (SEM) and X-ray photoemission spectrometer (XPS) reveal that the GO nanosheets were successful deposited on the WP surface via the simple impregnation process. With the increasing content of WP and GO, the thermal conductivity of PU/WP@GO SSPCMs was improved significantly. Meanwhile, the PU/WP@GO SSPCMs not only have excellent thermal properties, including good thermal storage properties, well thermal reliability and reusability and good thermal stability , but also exhibit reliable light-thermal conversion performance. Thus, the obtained novel PU/WP@GO SSPCMs with high thermal conductivity can improve the use efficiency of PCMs as solar light absorber and display a high potential application in the field of solar thermal energy storage.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zishuai Jiang,Yuan Yu,Xin Wang,Xiaohan Sun,Jiazuo Zhou,Zhaolin Yang,Miao Sun,Haiyue Yang,Chengyu Wang
Micro-/nano-plastics (MNPs) accumulate in water environment, which raise increasing threats to ecosystems and human health. There is a pressing need for sustainable biomass adsorbent materials to remove plastic fragments from environments. Herein, wood flour modified through etherification was synthesized to remove polystyrene (PS) micro- and nanoparticles of different sizes from wastewater, leveraging electrostatic effects. DLHCWF-300, an idea capturing material, demonstrated maximum adsorption efficiency of 99.3 %, 97.5 % and 98.6 % for polystyrene (PS) particles with diameters of 100 nm, 500 nm and 1 μm, respectively. The DLHCWF-300 also exhibited high tolerance on various water conditions (acidic, saline and organic dye environments) and adapted to complex properties of MNPs (different sizes, compositions and surface charges). Furthermore, the DLHCWF-300 treated water was compatible with crop cultivation, meeting the actual needs for wheat growth. The adsorbed PS MNPs can be used directly with wood flour in the preparation of wood-plastic composites. This study provides a new avenue for valorization of wood flour in water remediation through the efficient and straightforward separation of various types of plastic particles.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 34
·e52603
·
IF 3.057
Kun Chai,Zesheng Xu,Dong Chen,Yingtao Liu,Yiqun Fang,Yongming Song
Microcellular foamed wood-plastic composites (WPCs) have shown good development prospects in environmentally-friendly composites. Herein, the foamed wood flour (WF)/polypropylene (PP) composites were fabricated by mold-opening injection molding using supercritical N 2 as a physical foaming agent. The effects of nano TiO 2 on the microcellular structure and mechanical properties of WF/PP composites were investigated, and the results show that nano TiO 2 accelerates the crystallization rate and reduces the crystallinity of PP, which is beneficial to the formation of foamed homogeneous systems and cell growth in the WF/PP composites. This is mainly due to heteronucleation effect of nano TiO 2 , resulting in the refinement of crystal. Molecular chain movement of PP is limited with the introduction of nano TiO 2 , resulting in increased the melt elasticity of WF/PP composites, thereby reducing cell coalescence and collapse. With the addition of 5 wt% nano TiO 2 , the cell density was increased by 393.8%, the cell size was reduced by 54.4%, and the cell size homogeneity was clearly improved. In addition, impact strength increased by 33.3%. The improved foamability of WF/PP composites using nano TiO 2 shows a great promise for the production and application of WPC foams, especially in automotive, packaging and building areas.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2013
·Vol. 48
·期 1
·195-206
·
IF 1.884
Wang Ting,Si Hongyan,Li Bin
Poplar wood flour, a low-cost and abundantly available material, was modified by grafting β - cyclodextrin in the presence of citric acid, aiming to expand the application of wood flour. The product was characterized by Fourier transform infrared spectroscopy and the technique of the phenolphthalein probe. By the technique of inverse gas chromatography and the method of Hamieh, the values of surface free energy and nonpolar part of the free energy were obtained. The results demonstrate that the dispersive component of the surface free energy of the products will increase with temperature increases, and the product presents a Lewis basic character with K
b / K
a = 3.67. Based on the structure of the product, the basicity comes from two parts. One is the rich electronic environment of the β - CD inner cavity, and the other is the formation of ester bonds through crosslinking between β - CD and wood flour by CA.
研究领域:
高分子化学
·
木材科学
·
表面科学
·
材料化学
·
分析化学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 8
·3464
·
IF 4.6
Ke Wang,Chuan Liu,Wenxi Xie,Yihan Ke,Xiaoyong You,Binghao Jing,Yongqian Shi
With the depletion of fossil fuel energy and both the slow development and low utilization rate of new eco-friendly energy, finding new ways to efficiently store energy has become a research hotspot. Presently, polyethylene glycol (PEG) is an excellent heat storage material, but it is a typical solid-liquid phase change material (PCM) with a risk of leakage during phase transition. A combination of wood flour (WF) and PEG can effectively eliminate the risk of leakage after the melting of PEG. However, WF and PEG are both flammable materials, which impedes their application. Therefore, it is of great significance to expand their application by forming composites from among PEG, supporting mediums, and flame-retardant additives. This will improve both their flame retardancy and phase change energy storage performance, and will also lead to the preparation of excellent flame-retardant phase change composite materials with solid-solid phase change characteristics. To address this issue, ammonium polyphosphate (APP), organic modified montmorillonite (OMMT), and WF were blended into PEG in specific proportions to prepare a series of PEG/WF-based composites. Both thermal cycling tests and thermogravimetric analysis results demonstrated that the as-prepared composites had good thermal reliability and chemical stability. In addition, during differential scanning calorimetry tests, the PEG/WF/[email protected]composite presented the highest melting latent heat (176.6 J/g), and its enthalpy efficiency reached more than 98.3%. The PEG/WF/[email protected]composite also exhibited superior thermal insulation performance when compared to the pure PEG/WF composite. Furthermore, the PEG/WF/[email protected]composite exhibited a significant 50% reduction in peak heat release rate as a result of the synergistic effect between OMMT and APP in the gas and condensed phases. This work offers a useful strategy for the fabrication of multifunctional phase-change material, which is expected to broaden its industrial applications.
研究领域:
材料科学
·
能源存储
·
复合材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）