POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 63
·期 2
·489-498
·
IF 3.2
Wenting Xu,Qianqian Gu,Fanghua Zhu,Qiang Chen,Yiyang Liu,Jie Li,Meifang Liu,Yong Yi
Polymer microspheres can be used as fuel containers for laser inertial confinement fusion (ICF) due to their low atomic number, low density, and high thermal stability. The thin-walled polymer microspheres are prone to cracking due to an increase in the diameter to thickness ratio (diameter/wall thickness). The effect of polystyrene (PS) and Poly (α-methyl styrene) (PAMS) materials commonly used in ICF experiments on the quality of thin-walled microspheres is investigated. PS hollow microspheres show better sphericity, smoother surface, and lower cracking rate than PAMS microspheres. Moreover, the heat treatment of solidified PS microspheres can improve the strength so that the cracking rate of the microspheres decreases. The relative mechanism of how the molecular structure affect the quality is also discussed. This study provides some guidance for the preparation of thin-walled polymer microspheres with high quality for ICF experiments.
研究领域:
材料科学
·
核物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shiyu Chen,Xinyang Chen,Yingkang Tian,Changyong Zhao,Rongjin Lin,Yu Qiu,Hao Zhang,Xuejie Gao,Xuhui Sun
Lithium metal batteries are considered promising candidates for next-generation energy storage systems owing to the high theoretical capacity and low electrochemical potential of lithium metal. However, conventional liquid electrolytes face challenges such as dendrite formation and “dead lithium” accumulation, limiting performance and safety of lithium metal batteries. In this study, a high-interface-compatible polyvinylidene fluoride PVDF-based quasi-solid-state electrolyte (PVDF@PS) was prepared using a simple direct scraping method, incorporating a high-affinity polyacrylic acid (PAA) binder. Under in-situ pressure during battery encapsulation, high-purity silicon was lithiated to form a lithium-silicon alloy, reducing the nucleation and diffusion barriers of lithium. Concurrently, a small amount of lithium reacted with the silicon surface oxides, forming a stable passivation layer of Li 4 SiO 4 , significantly mitigating the risk of dendrite penetration that could cause short circuits. Additionally, the PAA binder was lithiated into a highly flexible Li-PAA structure. The combination of these three components forms an alloy protective layer, enhancing the electrolyte/electrode interface stability with both flexibility and robustness. This design effectively regulates the volume changes of the lithium anode during the dynamic plating/stripping process, promotes uniform lithium deposition, and suppresses dendrite formation. Furthermore, the protection layer reduces side reactions by isolating the lithium metal from direct interaction with the electrolyte. As a result, compared to uncoated PVDF-based quasi-solid-state electrolytes, PVDF@PS demonstrates excellent stability and a notably low overpotential (20 mV) in lithium symmetric cells at various current densities. In LiFePO 4 (LFP) full cells, it retains 80.3 mAh g −1 capacity after 1300 cycles, even under a high charge/discharge rate of 5C.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Dajiao Cheng,Rong Liu,Limei Tian,Quan Zhou,Fushuang Niu,Yinghong Yue,Ke Hu
Photocatalytic activation of prodrugs for killing cancer cells is an attractive alternative phototherapy to photodynamic therapy that typically relies on the supply of oxygen. Although prodrugs are widely developed, few other than Pt(IV) complexes are studied for photocatalytic activation. Herein, we report the photocatalytic reduction of nitrobenzene to aniline, an important chemical conversion for a large class of nitroaromatic prodrugs in cancer therapy that was previously limited to only enzyme-catalyzed activation. The carefully designed photocatalyst is a photosensitizer (PS)-functionalized gold nanocluster (Au NC) (abbreviated as Au-PS) in which a ruthenium coordination compound as the PS is covalently linked to the glutathione-ligated Au NC surface. Visible light excitation of the photocatalyst reduces nitrobenzene to aniline with 100% selectivity. The remarkably high selectivity is attributed to the specific catalytic nature of the reduced Au NC from photoinduced charge separation within the Au-PS analyzed by time-resolved absorption spectroscopy. In vitro experiments show that the nitroaromatic prodrug 5-(aziridin-1-yl)-2,4-dinitrobenzamide (CB1954) induces significant cytotoxicity in the presence of the Au-PS and light under hypoxia. The photocatalytic nitroaromatic prodrug activation by the Au-PS provides an alternative approach in the category of photochemotherapy to confront hypoxic cancer cells.
研究领域:
癌症治疗
·
光催化
·
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Mengdi Lu,Hu Zhu,Ming Lin,Fang Wang,Long Hong,Jean-Francois Masson,Wei Peng
Block copolymer (BCP) brush-like layer absorbed on optical fibers are shown to address the longstanding challenge of forming dense and well-dispersed gold nanorods (AuNRs) films on highly curved surface, allowing the development of real-time localized surface plasmon resonance (LSPR) biosensors for antigen-antibody interaction. This method requires only solution-based manufacturing processes and a plasma cleaning step to self-assemble AuNRs with various aspect ratios on the optical fibers. Because AuNRs capped with cetyltrimethylammonium bromide (CTAB) have been problematic for biosensing applications due to their cytotoxicity and displacement difficulty in the construction of biosensors, citrate-stabilized AuNRs were prepared from CTAB-stabilized AuNRs via surfactant exchange. For comparison, both a poly(styrene)- b -poly(acrylic acid) (PS- b -PAA) BCP template with CTAB-stabilized AuNRs and a poly(styrene)- b -poly(4-vinyl pyridine) (PS- b -P4VP) BCP template with citrate-stabilized AuNRs were employed for the fabrication of the optical fiber biosensor. The LSPR spectral analysis results demonstrate that the sensitivity of the sensor produced by the PS- b -P4VP templating method was 1.5 times better than that of the sensor produced by the PS- b -PAA templating method, which was due to the improved surface coverage and reduced aggregation of nanoparticles. The detection limit of the PS- b -P4VP-templated sensor for human IgG was 0.6 nM. Furthermore, for citrate-stabilized AuNRs, the PS- b -P4VP templating method also led to a better surface morphology and higher sensitivity as compared to the standard particle absorption methods using alkoxysilanes or polyelectrolytes on identical fibers. The simplicity of the fabrication process and the far superior optical performance of the PS- b -P4VP-templated LSPR optical fiber sensor illustrate the ability to regulate the detection range by tuning the aspect ratios of the AuNRs, and demonstrate its application prospects as a real-time biosensor without cytotoxicity.
研究领域:
材料科学
·
纳米技术
·
光学传感
·
生物传感器
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2022
·
IF 6.057
Shoutian Qiu,Zhuo Li,Xiangyue Ye,Xiang Ying,Jiemei Zhou,Yong Wang
Block copolymers (BCPs) containing poly(dimethylsiloxane) (PDMS) blocks have been extensively used as precursors to prepare nanoporous materials with a diversity of compositions and morphologies. However, it remains desirable to facilely and efficiently transform the precursors into porous structures under mild conditions. Herein, we investigate the swelling behaviors of thin films of polystyrene-block-poly(dimethylsiloxane)-block-polystyrene (PS-b-PDMS-b-PS, SDS) in linear alkanes and produce well-defined nanoporosities in the SDS films following the mechanism of selective swelling-induced pore generation. Alkanes strongly swell PDMS blocks while slightly swell PS blocks, triggering the cavitation of the PDMS minority phases. The pore sizes as well as the porosities are determined by the interaction between the alkanes and the constituent blocks. Alkanes with lower carbon numbers exhibit a stronger affinity to the copolymer, leading to larger pores. Interestingly, we find that n-hexane is able to produce a porosity >30% at room temperature within a duration as short as 1 min. We demonstrate that PDMS, which has a lower surface energy, is enriched on the film surface, thus rendering a strong hydrophobicity to the produced porous SDS films. Ethanol permeation tests demonstrate the interconnected and accessible porosities and tunable flux as well as excellent pressure resistance of the porous SDS films, implying their potential applications as selective membranes in the filtration of organic solvents and oil/water separation.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
·
2012
·Vol. 59
·期 1
·215-228
·
IF 2.261
Zhihua Qiao,Zhi Wang,Chenxin Zhang,Shuangjie Yuan,Yaqun Zhu,Jixiao Wang,Shichang Wang
Polyvinylamine (PVAm) was modified using a cross-linking agent containing carriers piperazine (PIP). Attenuated total reflectance fourier transform infrared, elemental analyzer, and X-ray diffraction were used to characterize the PIP-modified PVAm. The PVAm–PIP/polysulfone (PS) composite membrane was developed by coating PVAm–PIP mixed solutions with different mass ratios of PIP/PVAm (m PIP /m PVAm ) on the PS ultrafiltration membrane. The effects of m PIP /m PVAm (from 0.715 to 2.860) in the coating solutions and wet coating thickness on the gas performance of the PVAm–PIP/PS composite membrane were investigated. The PVAm–PIP/PS composite membrane prepared showed higher performance than other membranes reported in the literature due to the large increase of the introducing carrier concentration and low crystallinity. Moreover, the separation performance stability of the PVAm–PIP/PS composite membrane was investigated and no deterioration in the membrane permselectivity was observed. Finally, the economic evaluation of the membrane with the highest performance prepared was carried out. © 2012 American Institute of Chemical Engineers AIChE J, 59: 215–228, 2013
研究领域:
材料科学
·
化学工程
·
气体分离膜
·
高分子化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jiajia Kong,Yanqing Liu,Lejie Wang,Jin Yang,Jipeng Men,Dongzhi Chen
Silicon nanocrystals (SiNCs) have triggered tremendous attention both in academia and industry due to their size-tunable optical properties, exceptional biocompatibility and environmental benignity. However, their less than 10 % synthetic yield and high reactive surface severely impede practical applications. Herein, we propose a strategy for gram-scalable preparation of polystyrene-capped SiNCs (PS-SiNCs) by an AIBN-initiated thermal hydrosilylation. The resulting PS-SiNCs exhibit a near-infrared emission centered at 838 nm with an absolute quantum yield of 13.28 %, and exceptional environmental stability even after storage for 180 days under ambient conditions. Subsequently, a novel nanocomposite ink is developed by incorporating the PS-SiNCs into a polydimethylsiloxane (PDMS) matrix reinforced with vinyl-terminated MQ silicone resin. Both printability and practicability of the PS-SiNCs/PDMS nanocomposite ink are examined on flexible substrates including cotton fabric and cellulose paper through screen-printed technique. Interestingly, the customized labels exhibit distinguishable and full patterns with NIR-I fluorescence under 365 nm UV lamp, demonstrating a promising anti-counterfeiting application. Notably, these screen-printed patterns show unprecedented PL stability even after immersed in various aqueous solutions and organic solvents. This work not only presents an innovative strategy for scalable preparation of stable and eco-friendly NIR-I luminescent materials, but also pave a new way to advanced anti-counterfeiting applications.
✓ 已验证
产品关联
DOI
高影响因子
Optical Materials Express
·
2020
·Vol. 10
·期 12
·3215-3225
·
IF 3.064
Chen Junfan,Li Tao,Zhang Jie
A structured SERS substrate with high uniformity and sensitivity was fabricated orderly by hydrophilizing the monocrystalline silicon substrate, self-assembling a layer of dense polystyrene (PS) microsphere array on the silicon, and depositing a layer (5 nm, 10 nm, 20 nm, 30 nm or 50 nm) of silver film. Rhodamine 6G (R6G) was used as a probe to characterize the performance of Raman enhancement. Experimental results show that our sample with deposition of a 5 nm silver film (PS-Ag-5) can obtain a large number of spatially distributed local electromagnetic field hot spots, with an enhancement factor of over 108, which is several orders of magnitude higher than that of other samples. The sensitivity of PS-Ag-5 to the concentration of probe molecules and the optical enhancement effect of PS microspheres were also analyzed. This novel structured substrate can achieve considerable uniformity, and the calculated relative standard deviation (RSD) of the characteristic peak at 1650 cm-1 is approximately 8%.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2024
·Vol. 9
·期 1
·109-121
·
IF 6
Xiaojuan Shen,Shouyan Sun,Pengwei Liu,ManLin Wei
3D foam-like composites with a large specific surface area and a well-distributed interconnected pore structure have been recognized as promising materials for energy storage devices. In this study, a novel composite electrode (PEUS-Mn-PS) consisting of a 3D foam-like PEUS matrix embedded with manganese dioxide (MnOx) was prepared using a simple and facile method. The PEUS matrix was fabricated by incorporating poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and water polyurethane (PU), where a sacrificial template of poly(3,4-ethylenedioxythiophene) (PEDOT)-decorated Ni foam (NF) was utilized. Specifically, surface modification of NF with a thin layer of PEDOT resulted in the formation of a more regular 3D interconnected scaffold of PEU with more hydrophilic surface, facilitating homogeneous formation of the electrode materials and electrolyte infiltration. Benefiting from the high conductivity of PEDOT:PSS, large surface area provided by PEU, and high capacity offered by MnOx, the resulting flexible PEUS-Mn-PS electrode exhibited an exceptional areal specific capacitance of 681.7 mF cm−2 (∼486.9 F g−1) at 1 mF cm−2, much larger than 358.9 mF cm−2 of the PUS-Mn-PS electrode prepared without PEDOT modification and 318.7 mF cm−2 of the NF-Mn electrode synthesized through direct electrodeposition of MnOx on NF. The resulting PEUS-Mn-PS electrode allowed the assembled solid-state symmetric flexible SC to achieve an impressive energy density of 0.043 mW h cm−2 at a power density of 2.24 mW cm−2, while maintaining excellent electrochemical performance even under various bending angles. This work provides a new approach to designing high-performance flexible SC electrode materials using a simple, cost-effective, and environmentally friendly method.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Siwen Bi,Zhuang Zhang,Zhenzhen Yang,Zitong Shen,Jiahui Cai,Jintao Hu,Haoxiang Jin,Tianhao Qiu,Peng Yu,Bin Tan
Due to the highly environment-dependent biodegradation and uncontrolled degradation period, the long-run feasibility and effectiveness of biodegradable polymers are extensively questioned to solve plastics waste accumulation and pollution problems. This work physically incorporated lipase PS from Burkholderia cepacian on cellulose nanocrystals (CNC) and embedded it in polycaprolactone (PCL) to construct stable and controllable interfacial microenvironment between CNC and PCL for the reinforcement and controllable self-driven biodegradation. The physical adsorption of lipase PS on CNC was studied by monitoring the surface charge and particle size. FT-IR spectra confirmed the successful incorporation of lipase PS and CNC. Compared with CNC, protein-modified CNC had a higher maximum thermal decomposition temperature of 345 °C and lower interfacial tension of 11 mN/m with PCL which provided PCL composites with higher nucleation efficiency and tensile elongation of 1086 % at break. In addition, only 0.67 % embedded lipase PS completely hydrolyzed PCL membranes in <140 h. The post-compression molding at 80–100 °C had negligible influence on the lipase activity, which indicated that CNC could protect the lipase from inactivation in polymer extrusion and compression. This work also highlighted protein-modified CNC as a new technology for polymer reinforcement.
研究领域:
材料科学
·
生物降解材料
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2019
·
IF 4.916
Qijun Wu,Jiaqi He,Hu Meng,Yu Wang,Yu Zhang,Hui Li,Liang Feng
Monitoring of copper(II) ion is critical for water safety. Herein, a solid phase extraction (SPE) column filled with home-made sulfonated PS-DVB microspheres was adopted to eliminate interference from other co-existing ions. Meanwhile, 1-(2-pyridylazo)-2-naphthol (PAN) as colorimetric reactant was dispersed in polyvinyl butyral (PVB) and immobilized on the filter paper. The as-fabricated paper-based microfluidic analytical device (μPAD) combined with home-made SPE column was utilized for the selective and quantitative determination of copper(II) ion. The selectivity and sensitivity for copper(II) ion were significantly enhanced by SPE-combined μPAD. The sensor has a noticeable color change in the presence of copper(II) ion. The limit of detection was as low as 0.340 μM, which is much less than the drinking water guidelines in many countries and organizations. This technology is convenient and does not need any expensive instrumentation and professional skills. It is easily used to achieve rapid and on-site assessment of copper(II) ion in real-world situations.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2018
·Vol. 25
·期 4
·1-10
·
IF 1.434
Zhang Haoruo,Heng Zhengguang,Chen Yang,Zou Huawei,Liang Mei,Zeng Zhong
The curing kinetics of epoxy system modified with Poly(ε-caprolactone)-block-Polystyrene (PCL- b -PS) diblock copolymer was investigated by differential scanning calorimetry(DSC). PCL- b -PS was synthesized Via the combination of ROP and ATRP, then incorporated into epoxy to access the nanostructured thermosets. The results of TEM, SAXS and DSC demonstrated the occurrence of Reaction-induced Micro-phase Separation. Kinetic studies showed that the PCL- b -PS block copolymer delayed the curing reactions of epoxy system. The occurrence of Reaction-induced Micro-phase Separation had no significant effect on the total heat of reaction ∆H and the total activation energy, but resulted in a higher activation energy at the beginning of curing. The increase in activation energy at the initial stage of curing was related to the size and distribution of the dispersed phase. It is expected that the investigation of cure kinetics of EP/PCL- b -PS could provide more theoretical basis for the preparation of block copolymer modified epoxy resin.
研究领域:
材料科学
·
高分子化学
✓ 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）