JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2022
·Vol. 34
·期 8
·04022159
·
IF 3.651
Bailin Shan,Xiaoyu Yang,Xuejuan Cao,Mei Deng,Boming Tang
With the development of the highway industry and new materials, long-afterglow luminescent material as a new energy storage and environmental protection material has gradually been applied to night lighting. In this study, SrAl2O4:Eu2+, Dy3+ long-afterglow materials were prepared by the solid-state reaction method. The luminescent properties were improved by changing the process parameters. The single-factor test results indicated that the luminescent properties were highest when flux content, calcination temperature, calcination time, and doping ratio of Eu and Dy were 5%, 1,300°C, 2 h and 1∶1, respectively. Then, long-afterglow materials with high luminescence were prepared by adding a pore-forming agent. The structural characteristics and optical properties of the products were analyzed. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis indicated that the addition of pore-forming agent did not change the crystal structure of the material but changed the surface morphology of the long-afterglow materials. The surface morphology of the products changed from flat and dense to a convex structure after adding pore-forming agent, and some connected pore structures were produced. The afterglow performance of products was continuously improved with the increase of pore-forming agent content. Finally, luminescent coatings were prepared by combining with fluorine-containing resin, and the performance was studied. The stability of luminescent coatings decreased with the increase of the filler:binder ratio, and the best ratio was 0.5∶1. The luminous performance of coatings was best when the amount of long-afterglow phosphor was 40%. The luminescent coatings had good adhesion with the road surface, and the luminescence could last for more than 7 h in a dark environment.
研究领域:
材料科学
·
道路工程
·
发光材料
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涂层技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2015
·Vol. 28
·期 5
·04015184
·
IF 1.296
Qianping Ran,Jinzhi Liu,Yong Yang,Xin Shu,Jiangang Zhang,Yonglin Mao
The aim of this study was to link the molecular weight (MW) of polycarboxylate superplasticizer (PCE) with the performance of cementitious system for the purpose of developing new products; PCE synthesized by copolymerization of methacrylic acid and methyl poly(ethylene oxide) methacrylate was characterized by proton nuclear magnetic resonance (1H-NMR) and gel permeation chromatography (GPC). The polycarboylate (PC) was separated into four fractions with different MWs using an ultrafiltration method. The interaction behaviors between PC fractions and cement particles were investigated by measuring the adsorption, zeta potential, and hydration. Results showed that PC fractions with medium MW showed a good dispersion and dispersion retention owing to the adsorption amount continuously increasing with time and delayed the longest cement hydration time. The highest MW of PC exhibited poor dispersion and dispersion retention, having the greatest adsorption amount on the cement surface and poor adsorption capacity in the later period, and carried out to promote hydration of cement compared with other polymers. It can be deduced that there was an ideal MW for the best different performance of the PC investigated. This can provide an important reference for optimizing the process parameters in the preparation.
研究领域:
建筑材料
·
高分子科学
·
水泥化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2022
·Vol. 34
·期 11
·04022285
·
IF 3.651
Ying Xu,Liang Wu,Xinpeng Lv,Zhijing Chou,Wenjie Li,Jie Ji,Shifa Xu
This study examined a method to improve the water stability of macroporous polyurethane mixtures. Poor water stability of these mixtures has become an obstacle to their popularization and practical application. The water stability of asphalt mixtures can be significantly improved by adding a silane coupling agent (SCA), but the application of this method to polyurethane mixtures has not been researched. Therefore, this study investigated the addition of an SCA to polyurethane to enhance the interfacial adhesion between the polyurethane and the aggregate, thereby improving the water stability of the target macroporous polyurethane mixture. To achieve this aim, two SCAs, KH550 and KH560, were selected, and the change in the bond strength of polyurethane with 0%–4% SCA content was analyzed. The results were then compared and verified in accordance with surface free energy theory. The influence of the SCA on the water stability of the macroporous polyurethane mixture was verified by performing an immersion Marshall test, freeze–thaw splitting test, and immersion Cantabro loss test. Additionally, the effects of SCA on the high-temperature performance and skid resistance of the macroporous polyurethane mixture were analyzed by performing rutting and skid-resistance tests. The results revealed that the bond strength of polyurethane initially increased, and then decreased, with increasing SCA content. The effect of KH550 on bond strength was significantly greater than that of KH560, because KH560 does not react with polyurethane. Thus, according to the bond strength results, the recommended SCA was KH550, and the optimal SCA content was 2%. The immersion Marshall and freeze–thaw splitting tests were determined to be more suitable for evaluating the water stability of macroporous polyurethane mixtures than the immersion Cantabro loss test. Compared with the ordinary macroporous polyurethane mixture, the tensile strength ratio and residual stability of the modified mixture with 2% KH550 were 35% and 12.4% higher, respectively, indicating that the addition of KH550 significantly improved the water stability of the macroporous polyurethane mixture. Additionally, the tensile strength ratio results were found to be consistent with the surface free energy theory. Furthermore, the addition of KH550 slightly enhanced the skid resistance and high-temperature performance of the macroporous polyurethane mixture.
研究领域:
材料科学
·
土木工程
·
聚合物复合材料
·
路面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2023
·Vol. 35
·期 4
·04023031
·
IF 3.2
Biqin Dong,Peiyu Chen,Bingxin Xiao,Lei Zeng,Meng Zhao,Shuxian Hong
The growth mechanism of layered double hydroxide (LDH) films grown in situ on steel via hydrothermal treatment is still unclear. In this study, the mechanism of Co-Al-CO3-LDH film grown in situ on a steel substrate was investigated in detail. During the hydrothermal reaction, the in situ growth process of Co-Al LDH on steel involved three steps: (1) hydrolysis of Al3+ and etching of the steel surface, (2) hydrolysis of urea and promotion of LDH nuclei, and (3) crystallization of LDH. More importantly, the generation of Al(OH)3 determined the integrity of the LDH film grown on the steel surface, and a suitable heating rate was also the key factor that affected the growth of the ordered and regular LDH nanoflakes. Therefore, this work provides a comprehensive understanding of the in situ LDH growth mechanism on steel and may facilitate optimal LDH film preparation.
研究领域:
材料科学
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腐蚀工程
·
表面化学
·
无机合成
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2022
·Vol. 35
·期 1
·04022362
·
IF 3.651
Ming Zhang,Luyan Wang,Xiuzhi Zhang,Xiangyun Mi,Fengmeng Sun,Zhenzhen Fang,Meishan Pei
In this study, sodium hypophosphite (SHP) was used to modify polycarboxylate superplasticizer (P-PCE), and the properties of P-PCE on β-calcium sulfate hemihydrate (β-HH) were systematically investigated. The results showed that P-PCE could exhibit better fluidity and more retarding effect compared with the conventional polycarboxylate superplasticizer (C-PCE). The reason might be ascribed to the higher adsorption ability of P-PCE because of its stronger complexing capacity with calcium ion, which was induced by the phosphonate and phosphinate groups in the P-PCE molecule. Additionally, PCE played an important function in hindering the calcium sulfate dehydrate (DH) crystallization instead of the dissolution of β-HH, resulting in the retarding effect. This new type of PCE can show great potential in gypsum engineering.
研究领域:
建筑材料学
·
材料化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2022
·Vol. 34
·期 7
·04022148
·
IF 3.651
Min Qiao,Jian Chen,Nanxiao Gao,Guangcheng Shan,Jingzhi Wu,Bosong Zhu,Qianping Ran
To explore the potential application of high-performance viscosity-modifying admixtures (VMAs) is of great importance. In this work, the effects of the adsorption group and molecular weight of VMAs on the properties of fresh cement paste were studied. A series of copolymers having similar molecular weights but different adsorption groups (carboxyl, sulfonic, and quaternary ammonium groups) were compared for the first time. A series of copolymers having the same chemical structure but different molecular weights were also compared. The adsorption, fluidity, bleeding, and rheological properties of the fresh cement paste mixed with different copolymers were tested. The results show that the copolymer, having stronger adsorption group (carboxyl group) and higher molecular weight, could decrease the bleeding and fluidity while enhancing the stability of the fresh cement paste more effectively. The study may help explore ideal materials for the design and preparation of synthetic polymer VMAs.
研究领域:
材料科学
·
土木工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Gonghe Tong,Furong Li,Mingming Wang,Zhigang Wang,Xiaoyao Tan
Micro-tubular protonic ceramic fuel cells (MT-PCFCs) exhibit substantial advantages such as high energy conversion efficiency, large volumetric power density, and intermediate operating temperature. The performance of MT-PCFCs is highly dependent on the microstructure of the microtubes. In this study, BaCe 0.7 Zr 0.1 Y 0.2 O 3-δ (BCZY)/Ni-BCZY (electrolyte/anode) dual-layer hollow fibers (DLHFs) are fabricated in a single step by co-spinning/co-sintering technique, which significantly reduces manufacturing time and cost. The relationship between the MT-PCFCs performance and the microstructure of the DLHFs is investigated. By adjusting the cermet powder content and the spinning rate, the microstructure of DLHFs is tailored and optimized to achieve the best performance for the MT-PCFCs. Experimental results indicate that the anode structure with thick finger-like voids inside and thin sponge-like interlayer closely attached to the thin electrolyte film is favorable to obtain high performance MT-PCFCs. A maximum power density of 554.5 mW cm -2 for the optimal MT-PCFC is achieved at 700 ℃.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Jia-Gen Cui,Hao Zhang,Ming-Shan Chen,Jia-Xin Wang,Yi Zhao,Jin-Long Li
Phthalates (PAEs), especially di (2-ethylhexyl) phthalate (DEHP), are generally considered to have adverse impact on nervous system. The residue of DEHP in the environment has gradually become a widely concerned environmental problem due to its widespread use in plastic items. Lycopene (LYC) as the readily available natural antioxidant is considered to have the potential to alleviate exogenous poisons-induced nerve damage. However, there is currently a lack of strategies to alleviate the neurotoxicity caused by DEHP, and it is also unknown whether LYC can alleviate the neurotoxicity caused by DEHP. The experiment demonstrated that LYC had the potential to mitigate DEHP-induced mitochondrial damage in cerebellum. DEHP induced the disorder of Ca 2+ transport in cerebellum, thereby resulting in the imbalance of protein homeostasis. Such disruption in protein homeostasis further results in the overactivation of mitochondrial unfolded protein response (UPR mt ) and mitochondrial injury. Mechanistically, LYC could alleviate the imbalance of calcium homeostasis and protein homeostasis induced by DEHP via regulating inositol 1, 4, 5-trisphosphate receptor type1 (IP3R1) and sarco/endoplasmic reticulum Ca (2+)-ATPase 2 (SERCA2), further alleviating mitochondrial damage in cerebellum. Subsequently, the present study suggested the mechanism of cerebellar injury induced by DEHP, and provided a novel approach to treating DEHP-induced neurotoxicity.
研究领域:
神经科学
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毒理学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2024
·
IF 3.7
Liwen Wang,Ling Xin Yong,Say Chye Joachim Loo
This is the first study that explores blending polylactic acid (PLA) with various biomasses, including food wastes─brewer’s spent grain (BSG), spent coffee grounds (SCG), sesame cake (SC), and thermoplastic starch (TPS) biomass to create composite gastric floating drug delivery systems (GFDDS) through 3D printing. The aim is to investigate the influence of biomass percentage, biomass type, and printing parameters on their corresponding drug release profiles. 3D-printed (3DP) composite filaments were prepared by blending biomasses and PLA before in vitro drug release studies were performed using hydrophilic and hydrophobic model drugs, metoprolol tartrate (MT), and risperidone (RIS). The data revealed that release profiles were influenced by composite compositions and wall thicknesses of 3DP GFDDS capsules. Up to 15% of food waste could be blended with PLA for all food waste types tested. Delivery studies for PLA-food wastes found that MT was fully released by 4 h, exhibiting burst release profiles after a lag time of 0.5 to 1.5 h, and RIS could achieve a sustained release profile of approximately 48 h. PLA-TPS was utilized as a comparison and demonstrated variable release profiles ranging from 8 to 120 h, depending on the TPS content. The results demonstrated the potential for adjusting drug release profiles by incorporating affordable biomasses into GFDDS. This study presents a promising direction for creating delivery systems that are sustainable, customizable, and cost-effective, utilizing sustainable materials that can also be employed for agricultural, nutraceutical, personal care, and wastewater treatment applications.
研究领域:
材料科学
·
药剂学
·
可持续工程
·
生物医学工程
·
3D打印技术
✓ 已验证
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 1
·1-20
·
IF 21.8
Ma Yibo,Dong Jiaxing,Zou Xiangqian,Jiang Xiaohua,Liu Linhua,Wang Bing,Mao Xiulin,Gong Liangfeng,Li Guoshu,Chen Changjian
Metabolic reprogramming is fundamental to synovium remodeling with drug delivery for osteoarthritis (OA) therapy. Mitochonic acid 5-MASM7@MnTBAP nanoparticles (MM@MT NPs) with various physicochemical properties and biological activities may be developed as a supramolecular nano-drug delivering to articulus for regulating mitochondrial metabolism of synovium. This study aims to explore the feasibility, efficacy, and mechanism of MM@MT NPs, which possibly excavates a novel perspective for OA therapy. Herein, for feasibility, MM@MT NPs has been indicated to possess excellent photothermal, reactive oxygen species (ROS) response, and oxygen release performances. For efficacy, MM@MT NPs has been confirmed to promote extracellular matrix (ECM) regeneration. For mechanism, MM@MT NPs has been illustrated to restore the mitochondrial membrane potential and recover the mitochondrial dynamics, which is beneficial for maintaining mitochondrial homeostasis. Moreover, MM@MT NPs has been demonstrated to stimulate the tricarboxylic acid (TCA) cycle and oxidative phosphorylation (OXPHOS) in mitochondria as well as enhance antioxidant capacity and eliminate oxidative stress, which is reflected in regulating the adenosine triphosphate (ATP) and ROS metabolism. Therefore, MM@MT NPs can remodel the homeostasis of mitochondria via reprogramming metabolism in synovium, which achieves the symptomatic and etiological treatments of OA.
研究领域:
纳米医学
·
风湿病学
·
药物递送系统
·
线粒体生物学
·
骨科
✓ 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）