INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Shihao Lv,Yong Huang,Zhenzhong Gao,Xianfeng Hou,Jie Yang,Jin Sun
Lignocellulosic biomass is a sustainable alternative to petroleum-derived chemicals for the development of bio-based wood adhesives. However, limited by the complexity and reactivity of biomass, bio-based adhesives are not competitive in terms of physicochemical properties . In this study, a novel bio-based phenol-formaldehyde resin was prepared directly using phenol to liquefy waste sawdust without removing the residue, and modified with a small amount of melamine . The results demonstrated that the melamine-modified bio-based phenol-formaldehyde resin (MBPF) exhibited better physicochemical qualities. Particularly, the free phenol content was 0.36 %, 57.6 % less than in common phenol-formaldehyde resin. Various characterizations of resins showed that liquefied sawdust could successfully substitute phenol in the resin system. Ortho hydroxymethylphenol was produced by an addition reaction between the liquefied sawdust or phenol and formaldehyde during the resin production process. A reticulated cross-linking structure was then formed between the hydroxymethylate liquefied sawdust and polyhydroxymethylphenol through the dehydrated condensation reaction . The degraded sawdust chain segments were successfully embedded in the resin, increased the molecular weight of the resin prepolymer and improved the initial thermal stability. After a tiny amount of melamine was added, the resin produced a denser cross-linked network, which improved resin condensation activity, decreased the curing time, and successfully increased the bonding force between the liquefied sawdust and resin molecules. The wet shear strength of MBPF resin could reach 1.43 MPa, which was equivalent to PF resin.
研究领域:
材料科学
·
林产化学加工工程
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2014
·
IF 5.039
Xinhua Shi,Jie Wang
The pyrolysis characteristics of xylan , cellulose, ADF (a mixture of cellulose and lignin extracted from pine wood) and pine wood were investigated in a fixed-bed reactor by determining the distributions of three-phase products, the elemental compositions of char products, the conversions of components and the profiles of gas release rate during pyrolysis as well as the compositions of liquid products. Interactions were found to occur between the different components. Lignin accelerated the release of CO 2 and CO from cellulose and intensified the decomposition of cellulose to smaller molecular weight liquid compounds. Pine wood exhibited the componential interactions, resulting in the broadened temperature range of mass loss, the enhanced yield of char, and the increased heterogeneity of char. Pine wood produced more bio-oil than each component sample, with the compositional formula of CH 1.07 O 0.31 . The formation of liquid compounds from pine wood was also observed to be influenced by the componential interactions.
研究领域:
能源与燃料
·
生物质能
✓ 已验证
DOI
高影响因子
Journal of Biobased Materials and Bioenergy
·
2023
·Vol. 17
·期 2
·225-231
·
IF 0.5
Wang Lei,Miao Lei,Chen Dong-Chu,Zhang Min
The recycling use of wood sawdust to process composite boards has received much attention in recent years. To avoid the use of chemical adhesives, natural cellulose-based materials were often used as adhesives to combine wood sawdust. Rather than utilizing nanocellulose, the report
herein describes a method to prepare a robust composite board that is based on microfibrous cellulose, which is a low-cost commercial product. To effectively cross-link wood sawdust and microfibrous cellulose, phosphoric acid-activated glutaraldehyde was used as catalyst. Compared to its uncross-linked
counterpart, the modulus of elasticity and modulus of rupture of the composite board that had been cross-linked by glutaraldehyde and phosphoric acid were significantly strengthened to 3.45±0.06 GPa and 36.5±3.5 MPa, respectively. Moreover, the moisture resistance of the cross-linked
composite board was also enhanced. After soaking in water for 24 h, the mass swelling ratio and thickness swelling ratio of cross-linked composite board had only changed 49% and 21%, respectively. These performances even exceeded that of composite board prepared from nanocellulose. The method
described in this work may have applications in commercial processing and the recycling of wood sawdust.
研究领域:
材料科学
·
林业工程
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Lei Ye,Xuezhen Yang,Zhenzhu Huang,Bo Zhang,Qing Tian,Yu Huang,Wei Tan,Mingjun Feng,Xiaolin Li,Hongbin Xu
Driven by the need for sustainable agriculture, using Lycium barbarum (goji) sawdust as a substrate for mushroom cultivation increases productivity while reducing environmental impact. This study evaluates the effects of different proportions of goji sawdust on the growth, yield, and metabolic profiles of pink A. cornea . Six substrate formulations were tested, with 16 % goji sawdust supporting optimal yield and quality. LC-MS/MS-based metabolomics identified 1335 metabolites, mainly organic acids and derivatives, lipids and lipid-like molecules, organoheterocyclic compounds, and benzenoids. Biomarker analysis revealed twenty to thirty-five metabolites associated with substrate variations. KEGG enrichment highlighted key metabolic pathways, including ABC transporters, amino acid biosynthesis, D-amino acid metabolism, and aminoacyl-tRNA biosynthesis, contributing to substrate adaptation. While this study offers insights into the metabolic responses of pink A. cornea to goji sawdust, future research should incorporate absolute biomarkers quantification to further validate these results and optimize substrate compositions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2023
·Vol. 29
·期 7
·2911-2923
·
IF 2.8
Zhang Hao,Li Yudong,Han Enshan,Chen Gaojun,Zhang Ziqiang,Yan Caihong,He Yanzhen
The low electrical conductivity of nickel–cobalt layered oxides and single Ni, Co metal oxides led to the low rate capability and poor cycling stability, which thus limits the commercial application in practical supercapacitor. Here, NiCoO 2 /WCC composite electrode materials were prepared by employing wood chips carbon (WCC) with the high specific surface area and low cost as the conductive layer, where hierarchical spherical structure of laminar NiCoO 2 interspersed as homogeneous and was oriented and constructed on the surface of carbon by hydrothermal and calcination. The strategy provided abundant frameworks and active sites for the in situ growth of NiCoO 2 , which prevented the aggregation of spherical structures to a certain extent; furthermore, the layered spherical structure exposed more active sites, which thus enhanced the electrochemical performance of the capacitor. The NiCoO 2 /WCC electrode ( R Ni:Co = 1) possessed a high specific capacitance of 1053.6 F g −1 at 0.5 A g −1 due to the synergistic effect between the bimetallic oxide and WCC, and the specific capacitance of the electrode remained 906 F g −1 even at a high current density of 10 A g −1 by the lamellar structure with more electrochemical sites. In addition, the asymmetric supercapacitor based on the NiCoO 2 /WCC cathode and the WCC anode delivers a high specific capacitance of 134.4 F g −1 at 1 A g −1 , a high specific energy of 36.6 Wh kg −1 at 1 A g −1 , and good cycling performance (~ 94.3% retention after 5000 cycles), where the above properties were superior to existing and similar electrode materials.
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
·
2020
·
IF 8.848
Qianyang Chen,Qianyuan Qiu,Xiaomin Yan,Mingyang Zhou,Yapeng Zhang,Zhijun Liu,Weizi Cai,Wei Wang,Jiang Liu
The direct carbon solid oxide fuel cell is a potential technology that efficiently and cleanly converts the chemical energy of solid carbon into electricity. Its superiority of all-solid-state configuration and unique operating mechanism indicate that it has a good application prospect in high energy density portable or backup power supplys. It can also be used to convert coal into electrical power. Here, for the first time, we report a compact direct carbon solid oxide fuel cell stack with 12 cells fabricated on a single 10 × 10 cm electrolyte plate. The plate covers a container filled with solid carbon-rich fuel to form a stack. No sealant and pipelines are needed and the carbon-rich fuel can be reloaded. Both activated carbon and sawdust of bauhinia tree branch are used as the fuel. The output power of such a stack approaches more than 10 W at 800 °C. Using 15 g of 5 wt% Fe-loaded activated carbon as the fuel, a stack discharging at a constant current of 1.5 A outputs an energy of 29 Wh, correspongding to an energy desnity of carbon of ∼2000 Wh kg −1 . This work shows the feasibility of developing direct carbon solid oxide fuel cell into a compact electricity generator using readily available carbon-rich fuels. It also shows promise of using this technology in clean and efficient conversion of coal to electricity.
研究领域:
能源工程
·
材料科学
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
BioEnergy Research
·
2024
·Vol. 17
·期 3
·1493-1502
·
IF 3.1
Jiao MeiZhen,Zhang Xinran,Wang Yiqin,Du Jian,Tao Yehan,Lv Yanna,Chen Ming,Lu Jie,Wang Haisong
Reed sawdust is a kind of paper mill waste with high cellulose and hemicellulose content. To promote the rational use of resources, it is essential to make full use of waste resources and transform them into new values. In this work, reed sawdust was pretreated with liquid hot water (LHW) at 170 °C for 30 min. A total of 39.00 g/L glucose was obtained after enzymatic saccharification of cellulose at 50 °C, 20 FPU/g- reed sawdust cellulase, 25% (w/v) reed sawdust, in 5 replenishments. When the fermentation was performed 96 h, the medium contained xylo-oligosaccharides (XOS) 11.74 g/L and biomass 15.21 g/L, in which lipid was 4.14 g/L. After spray drying, feed additives containing 29.17% XOS and 10.29% docosahexaenoic acid (DHA) can be prepared. In particular, the hemicellulose and cellulose in reed sawdust are creatively used at the same time without separation, which greatly reduces the cost of purification in traditional processes and provides a new way for the high-value transformation of sawdust resources.
研究领域:
生物资源技术
·
生物加工
·
工业生物技术
·
可再生能源
·
微生物发酵
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2017
·Vol. 25
·期 26
·25629-25637
·
IF 2.741
Yi Shengze,Sun Yuanyuan,Hu Xin,Xu Hongxia,Gao Bin,Wu Jichun
The adsorption removal of levofloxacin (LEV), a widely used fluoroquinolone antibiotic, by using the biochars derived from the pyrolysis of pine wood chip pretreated with cerium trichloride was investigated through batch sorption experiments and multiple characterization techniques. The differences in the basic physicochemical properties between Ce-impregnated biochars and the pristine biochars were confirmed by the analysis of elemental compositions, specific surface areas, energy dispersive spectrometry, X-ray diffraction, and thermo-gravimetry. FT-IR spectra of the pre- and post-sorption biochars confirmed the chemical adsorption for LEV sorption onto the biochars. Large shifts in the binding energy of Ce 3d , O 1s , C 1s , and N 1s regions on the pre- and post-sorption biochars indicated the surface complexation of LEV molecule onto the biochars. The binding species of Ce 4+ and Ce 3+ identified by X-ray photoelectron spectroscopy reflect the role of Ce oxides during sorption. Batch adsorption showed the significant enhancement of adsorption capacity for LEV after the Ce modification. Batch adsorption kinetic data fitted well with the pseudo-second-order model. Both the Langmuir and the Freundlich models reproduced the isotherm data well. Findings from this work indicated that Ce-impregnated biochars can be effective for the removal of aqueous LEV.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 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）