PROGRESS IN PHOTOVOLTAICS
·
2019
·Vol. 27
·期 4
·283-289
·
IF 7.776
Dongyang Dai,Xianjun Tu,Xiaoshan Li,Tiezheng Lv,Fei Han
In this work, fluorescent carbon quantum dots (CQDs) composite transparent film with blue emission was prepared via hydrothermal fabrication, mixing with vinyl acetate-ethylene (VAE) emulsion, coated and cross-linked on the glass in sequence. This CQD/VAE film has good sticking ability and compatibility of sealing ethylene-vinyl acetate (EVA) material and works well as luminescent downshifting (LDS) materials. Based on these features, we did a set of optical characteristics analysis for CQD/VAE film and inserted a CQD/VAE film between glass and EVA encapsulation in a mini metal wrap through (MWT) solar module. This LDS could convert UV part of solar spectra, which are normally blocked by EVA, into the blue range and improve the light absorption by solar cell. Enhancement in the performance of solar modules was proved, especially the improvement of current of short circuit (I sc ), external quantum efficiency (EQE) of the UV wavelength and solar module efficiency. This material provides the chance for prompt application, since it simply solves the dispersion problem of LDS material inside encapsulation and keeps the transparency of sealing polymer materials.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Silicon
·
2026
·Vol. 18
·期 11
·3745-3754
·
IF 4.1
Ma Luke,Xu Weiye,Zhang Yun,Pei Xueliang,Ge Fangfang,Huang Qing
Introducing SiC nanowires into SiC fiber-reinforced SiC matrix (SiC f /SiC) composites is an effective multiscale reinforcement strategy. In this study, nickel acetate tetrahydrate (Ni(Ac) 2 ·4H 2 O) was incorporated into a liquid polycarbosilane (LPCS) and converted stepwise into metallic Ni and Ni₂Si during pyrolysis. However, transmission electron microscopy and oxidation test indicated that the resulting fibrous products were mainly carbon nanotubes (CNTs). To obtain SiC nanowires, additional nano Si was introduced into LPCS containing Ni(Ac) 2 ·4H 2 O, with EDS and TEM confirming their successful formation. Furthermore, the introduction of nano Si yielded SiC with larger grain size compared to that derived from pure LPCS or LPCS containing Ni(Ac) 2 ·4H 2 O. To evaluate the impact of these changes on the mechanical properties of SiC matrix composites, SiC f /SiC composites were prepared using the impregnation-pyrolysis process with two types of LPCS as raw materials: one containing nano Si and the other containing both Ni(Ac) 2 ·4H 2 O and nano Si. The resulting composites exhibited flexural strengths of 285 ± 32 MPa and 577 ± 52 MPa, respectively. The improved flexural strength of the latter was explained by the presence of SiC nanowires.
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DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Lin Yu,Jia-Yue Dai,Zhen-Liang Xu,Yin-Xin Fang,Rui Jia,Yong-Jian Tang
Covalent Organic Frameworks (COFs) composite nanofiltration (NF) membrane has high permeation flux and rejection. However, the reaction rate of COFs is relatively slow. Adding acid catalyst is a common method to shorten reaction time. However, the dissatisfactory synthesis rate will lead to irregular structure of COFs materials. In this work, it is the first time to use organobase as a catalyst to prepare COFs composite membrane. The COFs structure will be optimized and the membrane performance can be enhanced. The prepared TpPa-PIP membrane compared with acid catalyzed TpPa-HAc membrane has better permeability, permeance of 89 L m −2 ·h −1 ·bar −1 and CR rejection of 99.54 %. This improvement is because of the TpPa-PIP intermediate made slower reaction speed that improves the overall regularity and crystallinity of COFs. Therefore, it is better method for broadening the application of organobase-catalyzed in preparing membranes.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Wenhao Dou,Bingzhu Wang,Daxin Li,Xiaoliang Sun,Haobo Jiang,Yan Wang,Xingqi Liao,Ling Li,Yingying Wang,Zhihua Yang,Dechang Jia,Yu Zhou
To achieve low-temperature densification of short carbon fiber reinforced mechanical alloyed SiBCN composites (C sf /MA-SiBCN) and fill the research gap of high-temperature mechanical properties of C sf /MA-SiBCN composites, C sf /SiBCN composites containing both polymer derived SiBCN (PDCs-SiBCN) and MA-SiBCN were prepared by the densification of C sf /MA-SiBCN composites at 1100 °C via the repeated polymer infiltration and pyrolysis (PIP) process. Unlike traditional hot-pressed C sf /MA-SiBCN composites, the as-prepared C sf /SiBCN composites exhibit 2D layered structure and short carbon fibers are evenly distributed in the matrix. On this basis, mechanical properties and microstructural evolution were fully studied from room temperature (RT) to 1600 °C. The strength of 7 th PIP-ed composites at RT increases by 55.9% compared with that of C sf /MA-SiBCN composites because of higher density (2.00±0.01 g/cm 3 ) and lower porosity (4.14%±0.28%). At 1400 °C, the strength of C sf /SiBCN composites shows slightly higher value compared with the strength at RT. At 1600 °C, some SiC crystals and pores are observed in the interfacial region, and thus C sf /SiBCN composites show nonbrittle fracture behavior at 1600 °C with a strength retention ratio of 41.8%.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2012
·
IF 3.85
Meihong Liu,Guohua Yao,Qibo Cheng,Miao Ma,Sanchuan Yu,Congjie Gao
Acid stable thin-film composite membrane for nanofiltration was fabricated by interfacial polymerization of naphthalene-1,3,6-trisulfonylchloride (NTSC) and piperazine (PIP) on porous polysulfone support membrane. The performance of the membrane was optimized by studying the preparation parameters including monomer content, reaction temperature and additive in organic phase. The separation performance of the resultant membrane was evaluated through permeation experiments, the membrane property was characterized by ATR-FTIR, XPS AFM , SEM and streaming potential measurements, and the acid stability was investigated through both static acid soaking tests and long-term permeation tests under acidic condition. After exposure to 20%(w/v) H 2 SO 4 for 2 months or running with 4.9%(w/v) H 2 SO 4 for 60 day, the PIP-NTSC composite membrane showed minor change in separation performance and no evident chemical change in the active skin layer, indicating that the developed membrane possessed good acid stability. The desired membrane exhibited a pure water permeability of about 5.8 l/m 2 h bar, a MWCO of as high as 5000 Da, and an attractive solute rejection of higher than 86.5% for a feed containing 500 mg/l Na 2 SO 4 at 0.5 MPa. Furthermore, the PIP-NTSC composite membrane could be used to treat acidic effluents from metal industries with good perm-selectivity and long-term stability.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2020
·
IF 7.098
Jiayu Tian,Hailin Chang,Shanshan Gao,Ruijun Zhang
The potential toxicity of heavy metals arising from the discharge of industrial wastewater has become a serious public concern. Fabrication of a thin film composite (TFC) NF membrane with desirable rejection of heavy metal ions is an attracting route to solve this problem. Hereon, we proposed a facile strategy for fabricating a TFC NF membrane with excellent heavy metal removal. The ratio of PIP and TMC was greatly enlarged by decreasing the concentration of TMC to an exceptional low extent. Thus a polyamide film with weak electronegativity and small pore size was successfully constructed on an ultrafiltration substrate membrane. Comprehensive characterizations were adopted to reveal the micro-variation of the resulted NF membranes when regulating TMC concentration . The optimized membrane prepared only with PIP and TMC can exhibit a high pure water permeability of 14.6 L m −2 h −1 bar −1 , desirable rejection of over 98% against Ni 2+ , Zn 2+ , Cu 2+ , and >92.7% against Cd 2+ . This performance could go beyond most of the reported candidates which were prepared with other complicated methods. The simplicity, low cost and scaling up feasibility of the current strategy is expected to well meet the requirements of industrial production of TFC NF membrane for heavy metal removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2019
·
IF 2.338
Li-ping RAN,Fei RAO,Ke PENG,Huan YIN,Mao-zhong YI
Ultrahigh-temperature ceramics were added to C/C composites to meet their application requirement in a high-temperature oxidizing environment. C/C−ZrB 2 −SiC composites were fabricated by high-solid-loading slurry impregnation with polymer infiltration and pyrolysis. The dispersion and rheological behavior of ZrB 2 slurry and the microstructural, mechanical, and ablation properties of the C/C−ZrB 2 −SiC composites were investigated. Results indicated that a well-dispersed and low-viscosity ZrB 2 slurry was obtained using 0.40 wt.% polyethyleneimine as a dispersant at pH 5. Ceramics were uniformly distributed in the short-cut fiber layer and needle-punched area. The flexural strength of the C/C−ZrB 2 −SiC composites was 309.30 MPa. The composites exhibited satisfactory ablation resistance under the oxyacetylene flame of 2500 °C, and the mass and linear ablation rates were 0.40 mg/s and 0.91 μm/s, respectively. A continuous and compact ZrO 2 layer, which could effectively reduce the diffusion rate of oxygen and protect the composites from being ablated, was formed.
研究领域:
材料科学
·
航空航天工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Qingxia Yuan,Longyan Zhao,Zhenghui Li,Chaligan Harqin,Yunfeng Peng,Jikai Liu
Phellinus igniarius is a well-known edible and medicinal fungus consumed in Asia for centuries. In the present study, a polysaccharide named PIP-1 was obtained from Phellinus igniarius mycelia, its physicochemical properties were determined, its detailed structures were elucidated by analysis of its depolymerized product, and its antioxidant and antitumor activities were evaluated. Results showed that PIP-1 had a high molecular weight, a high intrinsic viscosity and a linear repeating backbone composed of glucopyranose (Glc p ), galactopyranose, and mannopyranose joined by α-(1 → 4), α-(1 → 3), and α-(1 → 6) linkages, and single α‑terminal‑D‑Glc p as side chains 6- O -linked to the main chain according to the GC-MS and NMR results, and exhibited triple helical structure. Pharmacological results revealed that PIP-1 could effectively scavenge hydroxyl radicals, partly scavenge DPPH radials and chelate ferrous metal ions. Furthermore, PIP-1 showed potent inhibitory effects on growth of HT-29 and MCF-7 cells. These findings suggested that high-molecular-weight PIP-1 containing triple helical structure and only α-type glycosidic bond holds promise as novel functional foods and agents to promote human health.
研究领域:
药物化学
·
药理学
·
真菌学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ANTIBIOTICS
·
2021
·Vol. 74
·期 5
·330-336
·
IF 2.649
Lan Sugui,Li Zhirong,Su Aiqiu,Peng Yanhong,Liao Yanke,Liu Xuemei,Tan Qiang
The purpose of this study was focused on the mechanisms of the cross-resistance to tetracycline (TET), piperacillin Sodium (PIP), and gentamicin (GEN) in Staphylococcus aureus (SA) mediated by Rhizoma Coptidis extracts (RCE). The selected strains were exposed continuously to RCE at the sublethal concentrations for 12 days, respectively. The susceptibility change of the drug-exposed strains was determined by analysis of the minimum inhibitory concentration. The 16S rDNA sequencing method was used to identify the RCE-exposed strain. Then the expression of resistant genes in the selected isolates was analyzed by transcriptome sequencing. The results indicated that RCE could trigger the preferential cross-resistance to TET, PIP, and GEN in SA. The correlative resistant genes to the three kinds of antibiotics were upregulated in the RCE-exposed strain, and the mRNA levels of the resistant genes determined by RT-qPCR were consistent with those from the transcriptome analysis. It was suggested from these results that the antibacterial Traditional Chinese Medicines might be a significant factor of causing the bacterial antibiotic-resistance.
研究领域:
微生物学
·
药理学
·
分子生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Meng-Han Miao,Jin-Kai Qiu,Zhen-Liang Xu,Cheng Lian,Hong-Lai Liu,Jia-Hui Li,Yong-Jian Tang
Monomers are elementary units that constitute the polyamide layer, which determines the properties of nanofiltration membranes. The design of nanofiltration membranes with both high separation performance and outstanding chemical stability remains a challenge. In this study, two typical monomers, heterocyclic monomer molecule-piperazine (PIP) and carbon ring molecule-1,4-cyclohexane diamine (CHDA), were applied as aqueous monomers for interfacial polymerization to generate polyamide nanofiltration membranes. The physicochemical properties of the two nanofiltration membranes were comprehensively investigated. The results demonstrated that the nanofiltration membrane fabricated via CHDA exhibited more chemical stability than that fabricated via PIP. The mechanisms influencing the chemical stability difference were elucidated via multiscale simulation. The CHDA polyamide has higher levels of HOMO-LUMO energy and Gibbs-free energy, which make it more stable under harsh chemical environments. Overall, this work presents the effect of the diamine structure on the chemical stability of polyamide NF membranes, which can inspire highly chemically stable nanofiltration membrane fabrication.
研究领域:
材料科学
·
化学工程
·
纳米技术
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产品关联
DOI
高影响因子
ANALYST
·
2022
·Vol. 147
·期 14
·3219-3224
·
IF 5.227
Jing Lei,Lu Shi,Wei Liu,Baoxin Li,Yan Jin
Portable detection of cancer cells is important for early-stage diagnostic applications and prognosis of cancer. Herein, a simple and sensitive chemiluminescence method was proposed for portable detection of cancer cells via a handheld luminometer. It is based on the cancer cell triggered cyclic strand displacement reaction (SDR) for signal amplification. Cancer cells, CCRF-CEM, bind to their aptamer and release the trigger DNA (TDNA) of SDR. The TDNA initiates the cyclic SDR between magnetic bead modified hairpin DNA 1 (MB-H1) and HRP-tagged hairpin DNA 2 (HRP-H2), resulting in an enrichment of HRP onto the surface of magnetic beads by forming H1/H2 duplexes. HRP catalyzed luminol/H2O2/PIP solution to produce a strong chemiluminescence (CL) signal. CCRF-CEM cells were sensitively detected by combining magnetic enrichment with the signal amplification of SDR. The CL intensity showed an excellent linear relationship with the number of CCRF-CEM cells in the range of 100 to 5 × 104 cells per mL. The detection limit was as low as 85 cells per mL. Therefore, it offers a sensitive, cheap and portable method for the chemiluminescence detection of cancer cells and provides a new option for the early diagnosis of cancers.
研究领域:
生物医学工程
·
分析化学
·
癌症诊断
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Membranes
·
2025
·Vol. 15
·期 8
·233
·
IF 3.6
Zeyuan Liu,Hailong Li,Qian Liu,Zhaoqi Wang,Danhui Wang,Peiqi Xu,Xigao Jian,Shouhai Zhang
Interfacial polymerization (IP) has been widely utilized to synthesize composite membranes. However, precise control of this reaction remains a challenge due to the complexity of the IP process. Herein, an optical three-dimensional microscope was used to directly observe the IP process. To construct copolyesteramide containing phthalazine moiety films, rigid monomer 4-(4′-hydroxyphenyl)-2,3-phthalazin-1-one (DHPZ) and flexible monomer piperazine (PIP) were used as aqueous phase monomers, and trimesoyl chloride (TMC) served as the organic phase monomer. Multilayer cellular structures were observed for the copolyesteramide films during the IP process. The effects of multiple factors including the ratio between flexible and rigid monomers, co-solvents, and the addition of phase transfer catalysts on the film growth and the morphologies were investigated. This research aims to deepen our understanding of the IP process, especially for the principles which govern polymer film growth and morphology, to promote new methodologies for regulating interfacial polymerization in composite membrane preparation.
研究领域:
材料科学
·
高分子化学
·
膜技术
·
界面工程
✓ 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）