European Journal of Wood and Wood Products
·
2023
·
IF 2.6
Liu Meihong,Lyu Shaoyi,Cai Liping,Lei Yafang,Peng Limin,Yan Li,Lyu Jianxiong
In this study, radiata pine wood was impregnated with furfuryl alcohol (FA) resin and radially compressed at compression ratios (CRs) of 17%, 33%, and 50%, respectively, to improve the acoustic and viscoelastic performance. The optimum CR was selected by analyzing the properties of FA-densified modified woods with different CRs. The storage modulus and loss factors of the FA-densified modified woods with CRs of 17%, 33%, and 50% were better than those of fretboard wood. The fretboard wood had an extremely high dynamic modulus of elasticity ( D′ \(\ge\) 16.22 GPa) and dynamic shear modulus ( G′ \(\ge\) 2.23 GPa). The D′ and G′ of the FA-densified modified wood with a CR of 50% were 25.44 GPa and 4.08 GPa, respectively, which are better than those of the fretboard wood. The common fretboard wood had a low sound velocity ( υ ), small specific dynamic elastic modulus ( \({E}_{sp}\) ), small sound radiation coefficient ( R ), and low acoustic conversion efficiency ( ACE ), along with a high acoustic impedance ( ω ) and high sound quality factor ( Q −1 ). The values of υ , \({E}_{sp}\) , R , ACE , ω , and Q −1 of the FA-densified modified wood with a CR of 50% were 4563 m/s, 19.9 GPa, 3.49 m 3 Pa −1 s −3 , 253, 5.70 10 6 (Pa s m −1 ), and 13.80 \(\times\) 10 −3 , respectively, meeting the performance requirements for fretboards and demonstrating the potential to replace fretboard wood in fretboard manufacturing. This research promotes the application of a fast-growing plantation wood for the manufacture of musical instruments and provides a good platform for its high-value utilization.
研究领域:
木材科学
·
声学工程
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产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2025
·
IF 5.3
Li Zhang,Zhaomeng Wang,Geng Wei,Puyue Xia,Sining Fan,Wenhao Zhang,Shaolong Tang
The preparation of conductive filler is a key technology in anisotropic conductive films preparation. In recent decades, research on the preparation of novel conductive particles has reached a bottleneck. Porous gold materials exhibit high compressibility, low density, and excellent conductivity. It is believed that using porous gold microspheres (PGMS) to supersede polymer composite conductive microspheres has the potential to prepare anisotropic conductive film (ACF) with better performance. However, preparing ultrafine (1–10 µm) PGMS remains challenging. Herein, the study presents a novel method for preparing PGMS with controllable particle size and high sphericity. Results show that porous gold microspheres ACF (PGMS-ACF), containing only 5 wt.% particles (size range 4.5–10.5 µm), achieves good conductivity when held at a pressure range of 0.05–0.6 MPa. Its compression ratio is between 33% and 71% at 0.3 MPa. The 4-point probe measurement shows a contact resistance as low as 10 mΩ in 2 mm 2 . Moreover, PGMS-ACF also exhibits a good linear relationship within 3.3 A. Compared to commercial polymer composite conductive microspheres ACF, PGMS-ACF offers a significant advantage in achieving a large compression ratio, which in turn leads to improved conductivity and reduces the need for precise sorting. The research provides a new approach for the preparation of novel ACF.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Yuan Liu,Fang Liu,Li Yang,Feiqiang Guo,Shiliang Wu,Rui Xiao
The work introduced an innovative pathway for converting biomass-derived carbonyls into long-chain ethers, examining their low-temperature oxidation in a modified Cooperative Fuel Research (CFR) engine. The conversion of 2-butanone achieved 100 % and the selectivity of sec -butyl isopropyl ether reached the maximum of 83.13 % under optimal reaction conditions. Conversion of biomass-derived carbonyls increased from 31.77 % at 1 h to 36.28 % at 12 h, with the mass yield of long-chain ethers rising from 53.94 % to 62.86 %. At the same compression ratio, the maximum in-cylinder pressure and temperature increased as the long-chain ethers blending ratio increased. At the critical compression ratio, the net heat release rates (NHR) for blended fuels with 10 vol%, 20 vol% and 30 vol% long-chain ethers at the low-temperature heat release peak were 9.6 J/deg, 10.1 J/deg, and 10.0 J/deg better than that of n -heptane (6.3 J/deg), respectively. CO emissions from blended fuels before compression ignition were higher than n -heptane, while the value for the blended fuel with 30 vol.% long-chain ethers was reduced by 44.97 % compared to n -heptane after autoignition.
研究领域:
化学工程
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能源与燃料
·
催化
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2022
·Vol. 102
·期 15
·7136-7143
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IF 4.125
Kangyuan Long,Tonghao Zhang,Jae W Park,Joodong Park,Tao Yin
BACKGROUND Washing is an essential process in surimi production, from which a large amount of wastewater is generated. Due to the increasing pressure of environmental protection, it is an urgent technical requirement for surimi manufacturers to reduce water usage while maintaining the quality of surimi. In this study, composition, structure and gelling properties of grass carp surimi prepared with a modified washing process (MWP) were investigated. Intermediate dehydration with various compression ratios were utilized between two washing cycles. RESULTS Water usage and wastewater discharge were reduced significantly by 33% and 38%, respectively, when MWP was applied. As the compression ratio increased, composition of fat, cathepsins, transglutaminase and heme proteins in surimi decreased gradually. Yield, protein content and the major protein pattern of surimi were not changed, but surface hydrophobicity gradually decreased. As the compression rate increased to 1:2.0, textural values and water holding capacity of the corresponding surimi gel decreased gradually, while whiteness increased and then remained unchanged. At a higher compression ratio (>1:1.5), aggregated network and excessive free water were observed in the surimi gel. Composition and gelling properties of the MWP surimi with a compression ratio of 1:1.2–1:1.5 were equal to those of the surimi prepared under conventional three-cycle washing. CONCLUSION Results indicated that MWP demonstrated its great potential in surimi production by dramatically reducing the usage of cold water and discharge of wastewater without scarifying surimi quality. © 2022 Society of Chemical Industry.
研究领域:
食品科学
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环境工程
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水产加工
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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）