JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lutong Bu,Shuangying Li,Linchun Nie,Liushan Jiang,Guangyu Dong,Denghao Song,Wenjing Liu,Xiaodie Geng,Dejing Meng,Qingxiang Zhou
In this study, nitrogen-doped carbon dots ( N -CDs) were facilely fabricated by one-pot hydrothermal method with levulinic acid and triethanolamine . A fluorescent sensor array was established for identifying azo compounds including Sudan Orange G (SOG), p-diaminoazobenzene, p-aminoazobenzene, azobenzene and quantitative detection of SOG. Experimental results revealed that azo compounds could quench the fluorescent intensity of N -CDs. Owing to various azo compounds showing different affinities to N -CDs, the sensor array exhibited different fluorescence quenching changes, which were further analyzed with principal component analysis to discriminate azo compounds. The sensor array was able to differentiate and recognize diverse concentrations of azo compounds from 0.25 to 2 mg/L. Simultaneously, a variety of factors affecting the detection of SOG were optimized. Under the optimized conditions, the sensor showed excellent stability and sensitivity. The sensor possessed marvelous linearity in the range of 0.1–1 mg/L and 1–4 mg/L and the detection limit was 27.82 μg/L. Spiked recoveries of 90.8–98.2 % were attained at spiked levels of 0.2 mg/L and 1 mg/L, demonstrating that the constructed fluorescence sensor was dependable and feasible for sensing SOG in environmental water samples.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Wenyong Yang,Miaomiao Jia,Wei Shao,Zhen Chen,Jiajia He,Qingyun Wu,Panpan Zhang,Ming Xue,Yi Li
There is an increasing demand for advanced membranes that exhibit both high perm-selectivity and good stability in organic solvents , particularly for organic solvent nanofiltration (OSN). Traditional methods of synthesizing thin films using conventional interfacial polymerization (CIP) have been limited by the use of water-soluble monomers , which has hindered the development of high-performance membranes. To address this issue, a new method called organic-organic interfacial polymerization (OOIP) has been proposed. This method allows for the use of aromatic amines that are not water-soluble in the fabrication of ultrathin polyamide (PA) (<40 nm) thin film composite (TFC) membranes. By investigating five different organic solvents (tetrahydrofuran, acetone, N , N -dimethylformamide, N , N -dimethylacetamide, dimethyl sulfoxide) with varying water content as the organic phase for a water-insoluble benzidine monomer, two diffusion models of monomers were identified that resulted in different membrane structures and degrees of network crosslinking. The ultrathin PA membranes produced using tetrahydrofuran-H 2 O and N , N -dimethylformamide-H 2 O, along with solvent activation, demonstrated high methanol permeances of 11.4 L m −2 h −1 bar −1 and 6.0 L m −2 h −1 bar −1 , respectively, while maintaining exceptional rejections of over 99.0 % for small molecules with molecular weights greater than 452 g mol −1 . The OOIP method is scalable and reproducible, making it suitable for large-scale membrane production. This innovative approach shows great potential for advancing OSN technology and providing efficient and cost-effective separation solutions for various industries.
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
MACROMOLECULES
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2024
·
IF 5.1
Chi Zhang,Jiang-An You,Xue Wang,Rui Hou,Xiaofeng Li,Yuxuan Sun,Guorui Qin,Shenghai Li,Suobo Zhang
By examining the structural patterns of the imine monomers engaged in polycondensation, a series of poly(ether ether ketone) precursor polymers (PEEKi-N-acyl) modified with N-acyl Imine groups were designed in this work. Contrary to poly(ether ether ketone) (PEEK), these precursor polymers have superior solubility, enabling their production in solution and processing of membrane components. The membrane components’ substance could undergo an imine hydrolysis reaction in an acidic environment, turning them back into PEEK and giving them solvent resistance. In addition, the homogeneous polymer membranes of this series exhibit spontaneous pore formation under the action of ethanol, which was caused by solvent-induced internal stress relaxation. By utilizing the properties of this type of polymer, precursor polymers can be processed into PEEK sponge-like porous membranes, expanding the processing morphology and application range of PEEK.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Gang Wang,Jie Zhang,Liangshu Zhong,Zhiyong Tang
One of the most important limitations to the development of photocatalytic process is the light damping in the reaction medium, as described by the Beer-Lambert Law. To address this issue, we developed a new approach by 3D printing the silica glasses to extend the light transmission. We first compared and selected the photosensitive components, and then regulated the debinding and sintering procedure based on the thermogravimetry data. The 3D printed transparent silica cylinders were used as catalyst carriers in a packed bed micro photocatalytic reactor (MPR) for the methylene blue degradation. We also studied the catalyst support using opaque Al 2 O 3 , and a catalyst suspension system for comparison. The results indicated that the use of printed silica as carriers significantly enhanced the reaction efficiency of the MPR. The once-coated MPR demonstrated a remarkable degradation efficiency of 91.4 % with a short residence time of just 9.7 s. This improvement was attributed to the high transparency of silica, which extended the permeation of UV light within the system. Finally, we investigated the scale up effect, which demonstrated that size effects and mass transfer played crucial roles in the MPR.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Heguo Han,Linjian Sang,Jianhang Qiu,Zheng Liu,Huiting Yu,Qifeng Zhang,Yuxuan Sun,Shenghai Li,Suobo Zhang
Organic solvent nanofiltration (OSN) is a green, efficient and energy-saving new separation technology. However, it is exigent to membrane materials with both good soluble processability and solvent resistance , as well as methods for preparing composite membranes that combine high accuracy and stability. In this work, a novel polyaryletherketone containing phenylamine structure (PEK-PA) was prepared and used to fabricate a novel solvent resistant composite membrane via strategies of chemical crosslinking and polymer filling into the surface pores of the membrane. The crosslinking between PEK-PA and trimesoyl chloride improves the solvent resistance of the membrane and the strategy of polyamide filling improves the separation accuracy of the membrane. The prepared OSN membranes exhibit exceptional separation accuracy, with a molecular weight cut-off within the range of 214 g mol −1 to 383 g mol −1 . More importantly, the prepared membranes exhibit higher stability than the thin-film-composite membranes prepared by interfacial polymerization, which was demonstrated by a designed reverse pressure experiment. The prepared membranes can be continuously operated in DMF for 60 h, thereby demonstrating their excellent stability even for harsh polar aprotic solvents. Therefore, this work presents a novel solvent resistant membrane material with potential applications for OSN.
研究领域:
材料科学
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分离技术
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化学工程
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产品关联
DOI
高影响因子
SENSORS
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2024
·Vol. 24
·期 7
·2184
·
IF 3.4
Ke Peng,Tianyu Yu,Pan Wu,Mingjun Chen
Three-dimensional flexible piezoresistive porous sensors are of interest in health diagnosis and wearable devices. In this study, conductive porous sensors with complex triply periodic minimal surface (TPMS) structures were fabricated using the 3D printed sacrificial mold and enhancement of MWCNTs. A new curing routine by the self-resistance electric heating was implemented. The porous sensors were designed with different pore sizes and unit cell types of the TPMS (Diamond (D), Gyroid (G), and I-WP (I)). The impact of pore characteristics and the hybrid fabrication technique on the compressive properties and piezoresistive response of the developed porous sensors was studied. The results indicate that the porous sensors cured by the self-resistance electric heating could render a uniform temperature distribution in the composites and reduce the voids in the walls, exhibiting a higher elastic modulus and a better piezoresistive response. Among these specimens, the specimen with the D-based structure cured by self-resistance electric heating showed the highest responsive strain (61%), with a corresponding resistance response value of 0.97, which increased by 10.26% compared to the specimen heated by the external heat sources. This study provides a new perspective on design and fabrication of porous materials with piezoresistive functionalities, particularly in the realm of flexible and portable piezoresistive sensors.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
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2024
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IF 8.9
Xuefeng Li,Chunhua Ge,Keke Chen,Hongyu Guan,Xiangdong Zhang
Phase change materials (PCMs) are widely used in a range of energy storage applications due to high latent heat absorption and release capacities during phase change processes. There is still a lot to be done to resolve the inherent leakage, stiffness problems, and poor solar-thermal and electrical-thermal conversion capacities of PCMs to functionalize them. Here, a novel solid-solid phase change material (IGPCM) is created using block copolymerization. The IGPCM has a tunable enthalpy (from 58.16 to 99.60 J g −1 ) by adjusting the molecular weight of the PEG. The obtained IGPCM10K has high toughness (479.1 MJ/m 3 ), excellent bending and malleability. Since IGPCM10K suffers from poor thermal conductivity, photo responsiveness, and electro-thermal conversion, carbon nanotubes (CNT) can be added to our IGPCM10K in a simple way to improve these issues. The thermal conductivity of IGPCM10K-CNT-3 is improved by 55.6 % compared to IGPCM10K. The photothermal conversion efficiency is 84.9 % at 300 mW/cm 2 . The electrothermal conversion efficiency is 82.3 % at 12 A. The prepared flexible PCM composites have super toughness, high enthalpy, excellent thermal conductivity, and photo-thermal and electro-thermal conversion capabilities, which will show great potential in future applications.
研究领域:
材料科学
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能量存储
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纳米技术
·
复合材料
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产品关联
DOI
高影响因子
Additive Manufacturing
·
2025
·
IF 11.1
Yazhou Peng,Wenyue Zhao,Zhao Wang,Lei Shi,Wenjing Hua,Xiaoxia Yang,Jie Wang,Weidong Fei,Yu Zhao,Changhong Wang
Three-dimensional (3D) printing of silica glass provides significant advantages for the fabrication of silica glass with complex structures. However, auxiliary support structures are generally needed due to the low stiffness and strength of green parts, which limits the flexibility of the structure design. It is imperative to increase the strength of the green part and remove the support structures for improving the molding capacity and printing quality. This study introduces an approach for 3D printing of silica glass with complex structures by digital light processing (DLP) based on the high-strength green parts, which exhibits superior molding capacity. By comparing three monomers of 2-hydroxyethyl methacrylate (HEMA), 2-hydroxyethyl acrylate (HEA), and 4-hydroxybutyl acrylate (4-HBA), it was demonstrated that high photopolymerization reactivity is a key factor for improving the mechanical properties of green parts. Green parts printed with 4-HBA exhibit a combination of high modulus, high strength, and high conversion degree. Following heat treatment, these complex-structured green parts transform into dense, transparent silica glass. The specific compressive strength of silica glass with a lattice meta-structure reaches 4.94 × 10 4 N m kg −1 . This study enhances structural design flexibility in the 3D printing of silica glass, providing a novel perspective for future research.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhuo Xiong,Qingfeng He,Yong Zeng,Jimin Chen
To address the issue that traditional glass processing technologies struggle to achieve complex structural forming and precise doping of functional elements, this study employed vat photopolymerization (VPP) additive manufacturing technology to fabricate quartz glass with high-quality mechanical and optical properties. Moreover, doping was performed on the glass slurry, enabling the conversion of quartz glass into ultraviolet-excited luminescent glass. A comprehensive investigation was conducted on process optimization, microstructural characteristics, mechanical properties, and fluorescence performance. By optimizing the rheological properties of the photocurable slurry containing 58 wt% SiO 2 and the vacuum sintering process (sintered at 1240°C), highly dense amorphous glass was successfully prepared, which exhibited a light transmittance of >80%, a Vickers hardness of 758.2 HV, and a relative density of >99.9%. A specific doping method was designed to achieve the controllable doping of Ce 3+ ions. Under natural light, the doped and undoped regions are indistinguishable. Using this technology, luminescent glass with controllable doped regions was fabricated. This technology demonstrates the capability of photoluminescent site-selective doping and exhibits differentiated optical responses under visible light and ultraviolet light, thereby providing a customizable solution for next-generation information encryption materials.
研究领域:
材料科学
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增材制造
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光学材料
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荧光技术
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信息安全
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2025
·
IF 3.9
Kim Haeun,Kim Junhyeong,Bang Duhee
Advances in high-density oligonucleotide array synthesis have enabled the creation of increasingly large DNA libraries. However, current planar array platforms are designed to synthesize only femtomole-scale amounts of oligonucleotides per feature, due to their inherently small feature sizes and high spatial density. Conversely, column-based synthesis supports higher per-feature output but accommodates fewer sequences. In this study, we introduce a 3D-printed DNA synthesis substrate that combines the strengths of both approaches. Using an LCD-based 3D printer and photopolymer resins, we fabricated micrometer-scale columns filled with controlled pore glass (CPG), enabling high-density oligonucleotide synthesis with sub-nanomole-scale output per feature. We screened commercial resins for chemical resistance and optimized printing parameters to fabricate rectangular microholes with gap widths smaller than CPG beads, capable of securely retaining CPG beads. A 15-mer poly(dT) sequence was synthesized across 1000 microcolumns on the array using an inkjet-based phosphoramidite system. The substrate was fabricated in ~ 2.5 h at an estimated material cost of just $0.12 per unit.
研究领域:
生物技术
·
分子生物学
·
基因工程
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微纳加工
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增材制造
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产品关联
DOI
PubMed
高影响因子
POLYMER
·
2024
·
IF 4.1
Huiting Yu,Xi Sun,Zheng Liu,Heguo Han,Jianhang Qiu,Qifeng Zhang,Yuxuan Sun,Shenghai Li,Suobo Zhang
Semi-crystalline poly (ether ketone) (PEK) materials with intrinsic solvent resistance are ideal materials for the preparation of organic solvent nanofiltration (OSN) membranes. Although some precursor materials have been developed for soluble processing through group protection strategies, these precursors are difficult to hydrolyze, limiting their practical applications. In this work, we designed an easily hydrolyzable N-cyclohexyl-poly (ether ketone ether imide) (CYH-PEKEI) precursor that could be converted to PEK by acid treatment at 80°C within 1 h. The results showed that the prepared membrane was stable in various organic solvents, with a permeance of 1.29 L m −2 h −1 bar −1 in N, N-Dimethylformamide (DMF), a molecular weight cutoff of 320 g/mol, and good long-term operational stability. Additionally, the membrane demonstrated excellent aging resistance during variable temperature DMF operation. This work has stimulated the potential of PEK membranes for OSN applications by optimizing the precursor structure.
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
ADVANCED ENGINEERING MATERIALS
·
2025
·
IF 3.3
Ke Peng,Jun Bao,Jiahui Yao,Linhao Guo,Tianyu Yu
Carbon nanotube–polydimethylsiloxane (CNT–PDMS) composites hold significant potential using in flexible electronics and sensors, owing to their remarkable synergy between electrical conductivity and flexibility. However, current fabrication techniques face critical challenges such as the limited structural versatility of conventionally thermally cured PDMS, and the uneven dispersion and agglomeration of CNTs, hindering their fabrication and performance. This study tries to strike a balance between structural design flexibility and functional performance enhancement through the implementation of electric field-assisted strategies, offering a novel approach for the customization of flexible electronic devices. The electric field-induced alignment mechanism of CNTs and fibers within PDMS composites is studied. A comprehensive analysis of CNTs and fiber alignment in the PDMS solution is conducted, followed by characterization of CNT–PDMS. Ternary composites consisting of triply periodic minimal surface (TPMS)-structured carbon fibers and CNT-reinforced PDMS are fabricated by integrating liquid crystal display 3D-printed sacrificial templates with electric field-assisted alignment. Different TPMS structures and the effect of relative density on the compressive properties of the composites are studied.
研究领域:
材料科学
·
纳米技术
·
聚合物复合材料
·
柔性电子器件
·
三维打印技术
·
机械工程
✓ 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）