ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xin Ren,Hongjun Xu,Li Jin,Changbiao Chen,Xueting Lu,Shuaibo Han,Hui Wang,Yan Zhang,Fangli Sun
Bamboo, attributed to its short growth cycle and excellent mechanical properties, has become a popular alternative to wood and other building materials such as cement and steel. However, its susceptibility to cracking and molds hinders its broad application in architecture and furniture. In this study, the bioresin polyfurfuryl alcohol (PFA)-modified epoxy resin (EP)/polyetheramine (PEA) system was constructed and in situ cured inside bamboo. Results showed that the epoxy/PFA bioresin could fill in the vascular bundles and parenchyma cells of bamboo, in situ cured and combined with it via hydrogen bond to form a composite with good overall performance. Especially, the epoxy/PFA bioresin possessed good shape memory performance, which was able to counteract the dry shrinkage stress of bamboo. The three cycles of extreme heating–cooling tests and 6 h continuous drying test at 103 °C were conducted to verify the modification effect on crack resistance of bamboo. The PFA/EP/PEA-modified bamboo culms remained crack-free, while 75% of untreated ones cracked in heating–cooling tests. Besides, when all of the untreated bamboo culms cracked, only 33.3% of the PFA/EP/PEA-modified bamboo had cracks in the continuous drying test. Furthermore, the epoxy/PFA bioresin system in bamboo also improved the mold resistance. The bioresin composites comprising bamboo, epoxy, and PFA exhibit considerable potential for advancing the incorporation of bamboo into ecologically sustainable practices within the realms of construction and furniture applications. This advancement extends the lifespan of bamboo products as well as expands their application scope particularly in regions experiencing substantial fluctuations in outdoor humidity.
研究领域:
材料科学
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生物质工程
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Zhan Wang,Xueru Yan,Chang Cong,Guangyu Xing,Zhi Wang,Jixiao Wang
Nanomaterials derived from biomass preparation exhibit potential applications in the field of environmental protection. However, the synthesis methods still have some problems, including being a time-consuming and complex process and causing secondary pollution. In this work, polyfurfuryl alcohol (PFA) nanospheres are synthesized via a green method that uses water as the solvent, sodium dodecyl sulfate as the stabilizer, and p-benzenesulfonic acid monohydrate as the acid catalyst. In addition, the filtrate remained capable of preparing uniform nanospheres in five subsequent runs. Moreover, the size of PFA nanospheres could be regulated from 40 to 800 nm. The small PFA nanospheres provide a large surface area, suggesting more adsorption sites. PFA nanospheres are used first as novel bio-adsorbents for cationic dye (methylene blue) removal because of their abundant oxygen-containing functional groups and negative potential. Synthesis parameters and adsorption conditions affecting cationic dye removal, sorption mechanisms, and kinetics were studied. Results suggest that the synergistic effect of electrostatic attraction, π–π interactions, and hydrogen bonding contributes to the maximum adsorption capacity as high as 343.3 mg/g. Furthermore, the PFA nanospheres exhibited good regenerative properties. This work paves the way for the green and sustainable preparation of biomass furfuryl alcohol nanospheres.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
RSC Advances
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2014
·Vol. 4
·期 108
·63162-63170
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IF 3.708
Meijing Wang,Yi-nan Wu,Jingyi Shen,Meimei Zhou,Fengting Li,Bingru Zhang
In this work, porous carbon materials produced from poly(furfuryl alcohol) (PFA)/polyvinylpyrrolidone/silica composite electrospun fibers have been prepared by sol–gel, carbonization and etching processes. PFA acts as carbon source, tetraethyl orthosilicate (TEOS) serves as a template and poly(propylene oxide)-block-poly(ethylene oxide)-block-poly(propylene oxide) triblock copolymer Pluronic F127 works as a structure-directing agent. Three samples (C-1, C-2 and C-3) with different pore structures have been prepared. The structures of the pores are demonstrated to be dependent on the amount of TEOS and the presence or absence of F127 by means of various characterization methods. After the carbonization process, carbon material yields of 35.5%, 38.6% and 40.3% are obtained, corresponding to the samples of electrospun nanofibers M-1, M-2 and M-3, respectively. When further treated by the hydrofluoric acid (HF) etching, the regular morphology of the electrospun nanofibers disappears gradually by prolonging the etching time, and the as-obtained typical product C-3 has a high specific surface area (SSA) of 897 m2 g−1 and a specific capacitance of 205.5 F g−1 at the scan rate of 20 mV s−1 in KOH electrolyte solution. It is revealed that the structure of the pores and the high SSA are responsible for the excellent electrochemical performance of the porous carbon materials. According to the results, the typical product C-3 is a promising electrode material for electrical double-layer capacitors.
研究领域:
材料科学
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电化学
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 45
·28556-28563
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IF 3.108
Jianzhi Huang,Silan Bai,Guoqing Yue,Wenxue Cheng,Lishi Wang
In this work, we firstly propose and confirm a novel coordination matrix/signal amplifier strategy to construct a highly sensitive lead(II) electrochemical sensor. Lead(II) ions can be efficiently accumulated and deposited on the electrode surface by strong coordination bonds between the unoccupied d-orbital of lead(II) ions and conjugated π-electron backbones of polyfurfural film (coordination matrix), and then the anodic stripping current can be significantly enhanced by multi-walled carbon nanotubes (MWCNTs, signal amplifier), finally realizing the highly sensitive determination of lead(II). The polyfurfural film/MWCNT modified glassy carbon electrode (GCE) sensor provided a wide linear detection range from 0.05 to 10 μg L−1 and a low detection limit of 0.01 μg L−1 (S/N = 3) for lead(II). Compared with a classical mercury film sensor (a classical and effective method for determining heavy metal ions), our proposed sensor was more sensitive and achieved better results. Moreover, based on the coordination matrix/signal amplifier strategy, the polyfurfural film/MWCNTs/GCE sensor was further successfully utilized for the simultaneous determination of Cd2+, Pb2+, Cu2+, and Hg2+, demonstrating a wide linear detection range for Cd2+ (0.5–15 μg L−1), Pb2+ (0.1–15 μg L−1), Cu2+ (0.1–12 μg L−1), and Hg2+ (1.5–12 μg L−1) and a low detection limit for Cd2+ (0.03 μg L−1, S/N = 3), Pb2+ (0.01 μg L−1, S/N = 3), Cu2+ (0.06 μg L−1, S/N = 3), and Hg2+ (0.1 μg L−1, S/N = 3). Finally, the proposed sensor was successfully applied to simultaneously determine Cd2+, Pb2+, Cu2+, and Hg2+ in real tap water samples. This work provides a novel and effective analytical strategy for constructing novel electrochemical sensors and shows broad application prospects in heavy metal ion determination for the future.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Bingyu Zhao,Haojie Li,Yuxiu Yu,Yaodong Liu
Carbon molecular sieve membranes (CMSMs) have exhibited significant potential in gas separation applications, particularly in the realm of hydrogen and carbon dioxide separation. Poly(furfuryl alcohol) (PFA) represents a cost-efficient and sustainable precursor utilized in the synthesis of CMSMs. Nonetheless, PFA-based CMSMs have exhibited suboptimal performance and frequently necessitate supplementary supporting layers. In the present investigation, we have explored various acids as catalysts for the in-situ self-polymerization of PFA. Our findings reveal that PFA membrane catalyzed by sulfuric acid exhibits the most favorable performance, yielding a hydrogen permeability of 1394.4 Barrer and a H 2 /CH 4 selectivity of 404.1. These values exceed the Robeson upper limits established in 2019. The enhanced gas separation performance of the sulfuric acid catalyzed PFA-based CMSM could be attributed to the increased furan ring opening and higher polymerization degree achieved through this catalytic process. Furthermore, our investigation delved into the addition of poly(styrene-co-acrylonitrile) (SAN) into the PFA membrane, yielding a CMSM featuring both dense and porous layers. With the addition of 6 wt% SAN in PFA membrane, the resulting CMSM exhibited a hydrogen permeability of 3126.4 Barrer, underscoring the potential for high-performance CMSMs made from the economical PFA precursor. The optimization of the PFA polymerization process and the incorporation of SAN, hold the promise of further elevating the performance of PFA-based CMSMs, and these advancements will substantially contribute to the advancement of sustainable and efficient gas separation technologies.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 8
·5479-5491
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IF 3.9
Yaqi Yao,Hongying Zhuo,Jinming Xu,Xiaofeng Yang,Yanqiang Huang
A method for synthesizing carbon spheres with a tunable particle size and internal structure from polyfurfuryl alcohol (PFA) was developed. By tuning the concentration of a structure directing agent (polypropylene glycol, PPG), we found a mechanism to tune the inner architecture of carbon spheres driven by water-solubility. A mixture of PFA and PPG transferred from the “water-in-oil” phase to an “oil-in-water” phase with an increasing content of PPG because of a difference in water-solubility between furfuryl alcohol (FA), PFA, and PPG. As a result, the internal morphology of the carbon sphere evolved from a “cheese-like” to a “pomegranate-like” structure, which was accompanied by an increasing specific surface area and pore volume. Furthermore, the separation of C2H2 and C2H3Cl was tested on the 25%-FACS (furfuryl alcohol-based carbon sphere) sample under different activation treatments with CO2 or CO2–NH3, with the coexisting “cheese-like” and “pomegranate-like” inner structures, owing to its moderate pore volume and mechanical strength. The maximum adsorption capacity of C2H3Cl reached 0.77 mmol g−1, while C2H2 was adsorbed in significantly lower quantities. It is believed that the high polarizability and high dipole moment of the C2H3Cl molecule primarily contribute to the excellent performance of C2H2 and C2H3Cl separation, and the introduction of polar N-containing groups on the carbon skeleton further promotes C2H3Cl adsorption.
研究领域:
材料科学
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化学工程
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纳米技术
✓ 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）