POLYMER DEGRADATION AND STABILITY
·
2022
·
IF 5.204
Long Yan,Xinyu Tang,Zhisheng Xu,Xiaojiang Xie
To enhance the fire safety of historic buildings, developing fire-retardant coatings with integrated decoration, fire protection, ageing resistance and antibacterial performances is imperative. Here, a novel multifunctional transparent fire-retardant coating with fire protection, smoke suppression, antibacterial and anti-ageing functions was successfully fabricated using talc as a multifunctional synergist. Mechanical tests show that the multifunctional coating containing talc shows an improvement in pencil hardness and adhesion classification while keeping a high transparency. Moreover, adding talc is conductive to fabricate a physical barrier with super compactness and intumescence, which endows the coatings with excellent fire protection and smoke suppression functions. Especially, when the mass ratio of PPB to talc is 95:5, the obtained MTPPB3 coating retains a high-level transparency of 85.8%, accompanying with a 72.6% reduction in flame spread rating and a 57.0% reduction in smoke density rating compared to MTPPB0 without talc. TG analysis shows that the multifunctional coatings containing talc exhibit sharp enhancements in thermal stability and char yield, and MTPPB3 retains 32.7% residue at 800 °C. Meanwhile, the addition of talc results in high antibacterial rate against E. coli bacteria and durable flame-retardant and smoke suppression effects, and MTPPB3 shows an antibacterial rate of 99.0% against E. coli bacteria. This work provides a promising way to fabricate multifunctional transparent fire-retarded coatings with outstanding functions of decoration and fire protection.
研究领域:
材料科学
·
消防工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2023
·Vol. 103
·期 12
·5839-5848
·
IF 4.1
Xuan Yao,Anqi Wang,Bo Gao,Yu Xue,Xueling Zhao,Xuanyu Wang,Rui Wang,Min Zhuang,Changqing Wei,Weidong Cheng,Jian Zhang,Padraig Strappe,Zhongkai Zhou
BACKGROUND Ageing and associated cognitive impairments are becoming serious issues around the world. In this study, the physiological properties of three kinds of complexes of fatty acid (capric, stearic and oleic acid, respectively) and de-branched starch molecules were investigated via a d -galactose-induced ageing model. This study revealed differences in the regulation of cognitive impairment and brain damage following intervention of different complexes, which might highlight a potent approach for the prevention of this chronic disease. RESULTS Data indicated that three complexes improved response time and cognitive function and the bio-parameter markers associated with oxidative stress in ageing rats. Among them, the complexes prepared from de-branched starch–oleic acid showed a greater improvement compared to others. In addition, de-branched starch–capric acid complex showed a higher improvement in the morphology of colon cells and hippocampal neuronal cells. The consumption of de-branched starch–capric acid and –oleic acid complexes generated more short-chain fatty acids in the gut. More importantly, the complexation of de-branched starch with either caprate or stearate enhanced gut Akkermansia . Therefore, it was proposed that the richness in Akkermansia and gut metabolites might be associated with reduced damage of the hippocampal neuronal cells induced by the ageing progress. Moreover, the AMPK (AMP-activated protein kinase) pathway was activated in liver in de-branched starch–capric acid complex diet. In summary, de-branched starch–capric acid complex exhibited a greater effect on the attenuation of ageing-induced cognitive impairment. CONCLUSION This study might highlight a new approach for intervening in the cognitive impairment during the ageing progress via a food supply. © 2023 Society of Chemical Industry.
研究领域:
营养学
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老年医学
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神经科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 8
·1540
·
IF 4.967
Feiyue Wang,Hui Liu,Long Yan
Polypyrrole-decorated tungsten tailing particles (PPY-TTF) were prepared via the in situ polymerization of pyrrole in the presence of tungsten tailing particles (TTF), and then carefully characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and thermogravimetric analysis (TG) analyses. The effect of PPY-TTF on the flame retardancy, smoke suppression property and ageing resistance of intumescent fire-resistant coatings was investigated by a fire protection test, smoke density test and cone calorimeter test. The results show that PPY-TTF exerts excellent cooperative effect on enhancing the flame retardancy and smoke suppression properties of the intumescent fire-retardant coatings, which is ascribed to the formation of more cross-linking structures in the condense phase that enhance the compactness and thermal stability of intumescent char. The cooperative effect of PPY-TTF in the coatings depends on its content, and the coating containing 3 wt% PPY-TTF exhibits the best cooperative effect among the samples, showing a 10.7% reduction in mass loss and 35.4% reduction in flame-spread rating compared to that with 3% TTF. The accelerated ageing test shows that the presence of PPY-TTF greatly slows down the blistering and powdering phenomenon of the coatings, thus endowing the coating with the super durability of fire resistance and smoke suppression property. This work provides a new strategy for the resource utilization of tungsten tailing in the field of flame-retardant materials.
研究领域:
材料科学
·
火灾安全工程
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Xiulei Fan,Zixuan Ma,Yefeng Zou,Jiaqiang Liu,Jun Hou
In recent years, tire wear particles (TWP), as the significant proportion of microplastics (MPs), has adsorbed much attention due to its widespread presence in aquatic ecosystem . Compared with typical MPs, TWP exists significant differences in composition, additives, characteristics and so on. With TWP and polypropylene (PP) as target MPs, Cd 2+ and Pb 2+ as target pollutants, the adsorption-desorption characteristics of heavy metal ions on original and aged MPs were studied. Compare with the PP, the S BET of TWP increased more significantly after the UV ageing process. Meanwhile, the zeta potential of TWP increased from −8.01 to −14.6 mV and PP from −5.36 to −9.52 mV, and the surface of the TWP were more negatively-charged. In addition, the hydrophilicity of MPs enhanced due to the increased oxygen-containing functional groups after ageing process. Compared with PP, the physicochemical properties of TWP changed more obviously during UV ageing processes. The adsorption results showed that the pseudo-second-order model could better describe the adsorption processes of Cd 2+ and Pb 2+ on MPs. Meanwhile, the orders of adsorption capacity of MPs for Cd 2+ and Pb 2+ were aged TWP > aged PP > original TWP > original PP. The phenomenon of adsorption confirmed that TWP had better vector effects for heavy metal ions than PP, and the ageing processes could enhance the adsorption capacity of MPs. Moreover, the desorption results demonstrated that, compared with PP, the TWP (with higher adsorption capacity) also had the better desorption capacity for heavy metal ions in simulated gastric fluid. Compared with PP, the TWP might cause a more serious hazard to aquatic environment and organisms. These investigations would contribute to assessing the potential environmental and biological risk of TWP, especially considering the effect of the ageing process.
研究领域:
环境科学
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生态毒理学
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微塑料污染
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水生生态系统
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环境化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
·
2020
·Vol. 55
·期 6
·2509-2516
·
IF 2.773
Shufang Shan,Tianli Zheng,Chaoxiong Zhang,Xuejiao Song,Jiayi Chen,Ying Shi,Jia You,Guo Cheng,Jingyuan Xiong
Summary Antioxidant-rich diets affect telomere length, an integrative marker associated with age-related diseases. Yogurt exerts antioxidative capacity and is speculated to support healthy ageing. However, direct experimental evidence is missing. Here, the effects of yogurt and dairy-fermenting bacteria on D-galactose-induced ageing mice and chemically challenged HepG2 cells were evaluated. Relative telomere length (RTL) in leucocyte and liver were significantly longer in yogurt (1.21 ± 0.07; 1.23 ± 0.11) and Streptococcus thermophilus group (1.18 ± 0.15; 1.13 ± 0.12). When t -BHP-challenged HepG2 cells were treated with digested yogurt and S. thermophilus , the senescence index (13.67 ± 3.30; 19.67 ± 2.87) were lower and RTL (1.25 ± 0.11; 1.18 ± 0.10) were longer than the model. Antioxidative effects were observed for yogurt and S. thermophilus metabolites, whereas milk and Lactobacillus rhamnosus metabolites showed minimal influence on RTL and oxidative stress. In conclusion, this study showed that yogurt and S. thermophilus metabolites ameliorated telomere attrition in ageing mice and t -BHP-challenged HepG2 cells, possibly by reducing oxidative stress.
研究领域:
营养学
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衰老
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分子生物学
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细胞生物学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 18
·3697
·
IF 5
Wangwang Yu,Liwei Sun,Meihui Li,Youxue Peng,Chaohui Wei,Wen Lei,Rui Qiu,Ying Ge
Wood flour–poly(butylene succinate)–poly(lactic acid) biocomposite samples were prepared by fused-deposition-molding 3D-printing technology, and modifications with glycerol and a silane coupling agent (KH550) were carried out. The samples were then hydrothermally aged. Modification with glycerol and KH550 enhanced the hydrophilicity of the samples and increased their tensile strength. Hydrothermal aging clearly whitened the surfaces of all the samples and made them more hydrophobic. Meanwhile, their tensile properties and thermal stability became poor; a higher hydrothermal aging temperature affected the mechanical properties more negatively. The modified samples turned out to be more resistant to the hydrothermal aging, and modification with KH550 could improve the anti-hydrothermal aging properties of the samples better than that with glycerol, where the tensile properties and the cross-sectional morphologies of the fractured specimens were concerned. Generally, the effects of hydrothermal aging temperature on the physico-mechanical properties of the printed specimens were greater than those by hydrothermal aging time.Keywords:wood flour;poly(butylene succinate);poly(lactic acid);biocomposite;fused deposition molding 3D printing;hydrothermal aging
研究领域:
材料科学
·
化学工程
·
3D打印
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Jinying Zhou,Wenjun Rao,Shuai Hu,Xin Li,Linghua Ouyang,Shuilan Zhu
Te -flavor Baijiu is renowned for its complex sensory profile, which evolves significantly during ageing, though the aroma-active compounds driving these changes remain underexplored. To systematically evaluate the effects of ageing duration on its flavor properties, this study conducted a comparative analysis of samples aged for 0, 3, 5 and 10 years. The results demonstrated that esters exerted predominant influence on flavor development during ageing. In the initial ageing periods, ester concentrations increased markedly, with ethyl hexanoate emerging as a pivotal compound due to its high concentration and substantial odor contribution. Notably, distinct differences in aroma and taste were observed across ageing periods, with fresh Baijiu (0Y) exhibiting higher sweetness. Multivariate statistical analysis revealed distinct aroma profiles across ageing periods and identified 13 key aroma compounds that form the unique flavor skeleton of Te -flavor Baijiu. This study elucidates the flavor evolution dynamics during the ageing process of Te -flavor Baijiu, providing fundamental insights for process refinement and quality control in Baijiu production.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 23
·18548-18558
·
IF 4.6
Xuewei Pi,Yanbo Yao,Dini Qin,Tao Liu
The combined use of hydrogel active materials and porous and asymmetric electrodes enables the development of high-performance and high-power output moist-electric generators (MEGs). Herein, we report a direct laser writing carbonization (DLWc)-enabled approach for cost-effectively manufacturing the porous carbon electrode that can be easily integrated and assembled with the hydrogel active material for the scalable fabrication of MEGs. With the hydrogel active material composed of poly(vinyl alcohol) (PVA), poly(acrylic acid) (PAA), phytic acid (PA), glycerol and water, the best performing DLWc-enabled PVA/PAA/PA hydrogel-based MEG exhibited an open-circuit voltage of ∼0.8 V and a short-circuit current density of ∼110 μA cm−2 and delivered stable operation for more than 300 h in an ambient environment. In-depth studies further revealed the effect of time-ageing treatment of the hydrogel active material on its ionic conductivity and water uptake ability and the power performance of the finally assembled MEGs. Lastly, the combined investigations using microscopy, spectroscopy and electrochemical corrosion tests allowed us to unambiguously identify the critical roles of the corrosion reaction occurring at the metallic electrodes in enhancing the voltage and current performance of the hydrogel-based MEG.
研究领域:
材料科学
·
能源技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 13
·2716
·
IF 4.967
Feiyue Wang,Mengtao Cai,Long Yan,Jiahao Liao
Acrylamide-methacrylic acid copolymer named P (AM-co-MAA) was synthesized via aqueous solution polymerization, and then mixed with crosslinker, flame retardants and initiators to prepare multifunctional transparent flame-retarded hydrogels with transparency, fire resistance and anti-ageing property. The results show that the application of multifunctional transparent flame-retarded hydrogel imparts high level of transparency and excellent fire resistance to the fire-resistant glass, and the light transmittance and fire resistance of the flame-retarded hydrogel increases with the increasing mass ratio of AM to MAA in P(AM-co-MAA). When the mass ratio of AM to MAA is 4:1, the obtained P(AM-co-MAA) imparts the lowest backside temperature of 130 °C at 3600 s and highest light transmittance of 86.1% to the transparent flame-retarded hydrogel. TG and DSC analysis show that the addition of P(AM-co-MAA) increases the thermal stability of the transparent flame-retarded hydrogels due to the formation of numerous hydrogen bonds via the complexation between amide and carboxyl groups. Accelerated ageing test indicates that the transparent flame-retarded hydrogel containing P(AM-co-MAA) exerts durable fire resistance and transparency, and the ageing resistance of the transparent flame-retarded hydrogel depends on the mass ratio of AM to MAA in P(AM-co-MAA). Therefore, this study provides a promising strategy to prepare a novel multifunctional transparent flame-retarded hydrogel with excellent light transmittance, fire resistance and anti-ageing properties.Keywords:multifunctional transparent flame-retarded hydrogels;fire-resistant glass;fire resistance;anti-ageing property;transparency
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Canlin Zhang,Shuai Yang,Ting Wang,Song Xu,Peng Jin,Hongjun Dong,Yi Zhang,Yu Chen
γ-aminopropyltriethoxy silane organic layered double hydroxides (LDHs) and SBS were combined into LDHs/SBS composite to improve anti-ageing performance of SBS modified bitumen (SMB). XPS and SEM showed that organic LDHs (OLDHs) was successfully grafted onto SBS, and OLDHs could be more evenly distributed in SBS, which was conducive to improve the anti-degradation capability of SBS. Compared with SBS and LDHs/SBS composite, the interaction between OLDHs/SBS composite and bitumen was stronger, resulting in the better stabilization of SBS and LDHs in bitumen. Furthermore, OLDHs/SBS composite could enhance the high-temperature property of SMB. SMB became hard and brittle during ageing, the physical and rheological properties were remarkably deteriorated. LDHs/SBS and OLDHs/SBS composite could alleviate the damage of ageing on the high- and low-temperature performance of SMB and enhance the anti-ageing capacity, particularly OLDHs/SBS composite. Then, the improvement mechanism of OLDHs/SBS and LDHs/SBS composite on the anti-ageing capability of SMB was analyzed at microscopic scale. LDHs/SBS and OLDHs/SBS composite could hinder the infiltration of oxygen into bitumen and decrease the oxygen content, and simultaneously decelerate the oxygen diffusion rate in bitumen. The synergistic combination of these two functions conspicuously diminished the probability of oxygen colliding with bitumen or SBS, which relieved the ageing of bitumen and the degradation of SBS, and ultimately improved the anti-ageing capability of SMB. Furthermore, due to the better stability, the effectiveness of OLDHs/SBS composite was more notable than LDHs/SBS composite, OLDHs/SBS composite demonstrated superior improvement on the anti-ageing capability of SMB than LDHs/SBS composite.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Processes & Impacts
·
2024
·Vol. 26
·期 3
·499-509
·
IF 4.3
Mingyang Sun,Han Liu,Feixiang Liu,Hong Yang,Guanghuan Cheng
Black carbon (BC) exhibits promising potential as a sediment amendment owing to its commendable adsorption capacity for hydrophobic organic contaminants (HOCs), thereby resulting in HOC-laden sediments. Desorption kinetic studies play a crucial role in comprehending the release potential of HOCs from BC-sediment systems. Although the adsorption capacity of BC for HOCs has been found to decrease with aging, there is limited research on its impact on HOC desorption kinetics. In this study, BCs derived from agricultural waste (rice straw carbon, RC) and industrial waste (fly ash carbon, FC), respectively, were used to investigate the desorption kinetics of nonylphenol (NP). Additionally, a predictive model was established using the fitting parameters obtained from the modified two-domain model. The results showed that desorption of NP was divided into three fractions: rapid fraction (Frap), slow fraction (Fslow) and resistant fraction (Fr). BCs significantly decreased, while ageing increased the desorption amount and rate of NP. The performance of RC in controlling NP release was superior to that of FC. The predicted values calculated by the established model exhibit significant positive correlations with the measured values (p < 0.01). Additionally, the correlation analysis between sorption sites and desorption fractions revealed that the concentration of NP in the desorbing fraction was nearly equivalent to that of NP in partition sites within aged sediment/FC-sediment systems. However, the aged RC-sediment systems do not conform well to this rule. In other words, the estimation of NP release risk from sediments with a strong adsorbent would be overestimated, if Frap + Fsolw is considered equivalent to the desorbing fraction.
研究领域:
环境科学
·
生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2014
·
IF 3.309
Yuxi Gao,Xiaodong Wu,Shuang Liu,Duan Weng,Hongwei Zhang,Rui Ran
MnO x –CeO 2 mixed oxides were synthesized using a sol–gel method and the barium-loaded catalyst was prepared by a wet impregnation. Both catalysts were hydrothermally aged at 800 °C for 10 h. The fresh and aged catalysts were characterized by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), high-resolution transmission electron microscopy (HRTEM), H 2 temperature-programmed reduction (H 2 -TPR), NO temperature-programmed oxidation (NO-TPO) and soot temperature-programmed oxidation (soot-TPO). Compared with MnO x –CeO 2 , the Ba-modified mixed oxides show a much higher hydrothermal stability. Barium exists in the form of orthorhombic carbonate and cubic nitrate on the fresh sample. BaMnO 3 nanoparticles are identified to form at the interface of CeO 2 crystallites upon the hydrothermal ageing. The formation of the perovskites prohibits the sintering of ceria significantly, and consequently maintains the redox property of the aged mixed oxides to a great degree. Additionally, the nanoscaled perovskites themselves also contribute to the catalytic activity of the aged oxides catalyst.
研究领域:
催化材料
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）