SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Shengnan Chen,Zhiwei Zhao,Li Li,Fuyi Cui
Ultrafiltration (UF) is widely used in drinking water plants, nevertheless, it still encounters challenges stemming from inevitable membrane fouling caused by natural organic matter (NOM). Herein, this work applied VUV/PS as UF membrane pretreatment and used UV/PS for comparison. VUV/PS system exhibited superior ability in removing NOM compared to UV/PS system. HO and SO 4 − played crucial roles in the degradation. [SO 4 − ]ss was notably higher than [HO ]ss in the systems, yet HO was of greater significance. [HO ]ss and [SO 4 − ]ss in the VUV/PS process were remarkably higher than those in the UV/PS process, due to the function of 185 nm photons. VUV/PS pretreatment basically recovered flux and effectively reduced fouling resistance, with better performance than UV/PS. Fouling mechanism was dominated by multiple mechanisms after UV/PS pretreatment, whereas it was transformed into pore blockage after VUV/PS pretreatment. Moreover, the UF effluent quality after VUV/PS pretreatment outperformed that of UV/PS but fell short of that without pretreatment, possibly due to the generation of abundant low MW substances under the action of HO and SO 4 − . After chlorine disinfection, UV/PS and VUV/PS pretreatments increased the DBPs production and cytotoxicity. Specifically, oxidant PS affected the membrane surface morphology and fouling behaviors, and had no obvious effect on interception performance and mechanical properties. In actual water treatment, VUV/PS and UV/PS pretreatments exhibited excellent performance in alleviating membrane fouling, improving water quality, and reducing DBPs formation and acute toxicity.
研究领域:
环境科学
·
水处理工程
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 2
·1278-1287
·
IF 3.9
Xuepeng Liu,Hui Tong,Jinpeng Luo,Jiafeng Zhu,Shimo Cao,Ju Xu,Yudong Hou
Dielectrics of the polymer-matrix composite are considered to present combined advantages from both the polymer matrix and inorganic fillers. However, the breakdown strength, as well as energy density, is not effectively enhanced due to the poor compatibility between the organic and inorganic components. Herein, polymer composites derived from polystyrene (PS) and barium titanate (BTO) are proposed and beneficial interface modification by poly(styrene-co-maleic anhydride) (PS-co-mah) is conducted to improve compatibility between the inorganic filler and polymer matrix. The results show that the BTO@PS-co-mah/PS composites, in which the interfacial layer of PS-co-mah would undergo chemical reactions with the aminated BTO and blend PS matrix with excellent physical compatibility, exhibit enhanced breakdown strength and declined dielectric loss compared with both pure PS and BTO/PS without interfacial modulation. Particularly, the BTO@PS-co-mah/PS composite with 5 wt% filler content indicates optimized performance with an Eb of 507 MV m−1 and tan δ of 0.085%. It is deduced that the deep energy traps introduced by the PS-co-mah layer would weaken the local electric field and suppress the space charge transporting so as to optimize the performance of composites. Consequently, the interfacial-modified BTO@PS-co-mah/PS would present great potential for applications, such as film capacitors.
研究领域:
材料科学
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电气工程
·
复合材料
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 36
·45281
·
IF 1.86
Yijian Wu,Hui Zhang,Baoqing Shentu,Zhixue Weng
This work aimed at studying the role of poly(phenylene oxide) (PPO) and polystyrene (PS) in toughening polyamide-6 (PA6)/styrene-ethylene-butadiene-styrene block copolymer grafted with maleic anhydride (SEBS- g -MA) blends. The effects of weight ratio and content of PPO/PS on the morphology and mechanical behaviors of PA6/SEBS- g -MA/(PPO/PS) blends were studied by scanning electron microscope and mechanical tests. Driving by the interfacial tension and the spreading coefficient, the “core–shell” particles formed by PPO/PS (core) and SEBS- g -MA (shell) played the key role in toughening the PA6 blends. As PS improved the distribution of the “core–shell” particles due to its low viscosity, and PPO guaranteed the entanglement density of the PPO/PS phase, the 3/1 weight ratio of PPO/PS supplied the blends optimal mechanical properties. Within certain range, the increased content of PPO/PS could supply more efficient toughening particles and bring better mechanical properties. Thus, by adjusting the weight ratio and content of PPO and PS, the PA6/SEBS- g -MA/(PPO/PS) blends with excellent impact strength, high tensile strength, and good heat deflection temperature were obtained. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45281.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Yiling Zhu,Rui Zhu,Jun Xie,Qiuliang Wang,Hu Chen,Yunfei Liu,Yinong Lyu
A novel PS@CdTe multilayers fluorescence microsphere was successfully synthesized by the electrostatic layer-by-layer (LBL) self-assembly technique. The structure, the process of self-assembly and the fluorescence performance were confirmed by high-resolution transmission electron microscope (HRTEM), Zeta potentiometric analyzer and fluorescence spectrophotometer, respectively. The results manifest that when the pH of buffer solution is 7.8, the negative charge on the surface of CdTe quantum dots (QDs) is the largest, which is beneficial to the synthesis of electrostatic self-assembled microspheres. The fluorescence properties of PS@CdTe microspheres increased gradually with the number of layers coated increased, and the optimum number of coating layers is three. Under this condition, the PS@CdTe microspheres exhibited a great increase of 25-fold in fluorescence performance compared to the equal quantity of pure CdTe QDs. Moreover, the emission spectra of PS@CdTe microspheres recorded under the excitation of 410 nm, and shows a strong emission peak located at 524 nm. This kind of core-shell microspheres has a great potential to be used in the field of optoelectronics .
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 4
·1-11
·
IF 2.8
Qiu Caihong,Liao Xiafeng,Zheng Yiru,zhang Haowen,Lu Zhen,Hou Linxi
To address the challenge of controllable and precise regulation of the phase behavior of block copolymers, this study proposes a novel strategy to regulate the self-organization behavior of PS-P2VP block copolymers through supramolecular self-assembly. PS-P2VP was synthesized via the RAFT method, and three POSS molecules with different non-covalent interactions were synthesized and used to form complexes with the PS-P2VP copolymers. Characterization techniques such as NMR, GPC, FT-IR, TGA, DSC, SAXS, and SEM, along with theoretical methods, were employed to analyze the impact of POSS on the phase behavior of PS-P2VP. The results demonstrate that POSS is particularly effective in modulating the self-assembled phase behavior in the lamellar phase of block copolymers, with BPOSS-Cl showing the most significant modulation, enabling the complexes to achieve third-order peaks in SAXS measurements. This conclusion is further supported by theoretical calculations. The study not only reveals the mechanism by which POSS regulates the self-assembly behavior of PS-P2VP but also provides a promising direction for advancing autonomous phase selection in block copolymers.
研究领域:
高分子化学
·
材料科学
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DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Qiyang Guo,Ruixiang Yao,Huili Cheng,Kai Yin,Xiangrong Chen,Yaqing Lu,Ashish Paramane
The strategy of functionalized PS-NPs via PPy (PPy@PS-NPs) forming heterogeneous interface composition is highly efficient in increasing the insulation properties of linear low-density polyethylene (LLDPE). The morphology results show that PPy@PS-NPs are monodispersed in the LLDPE matrix after melting blend, which exhibits unparalleled engineering application value. The electrical insulation results show that PPy@PS-NPs introduced into the LLDPE matrix can reduce its DC electrical conductivity, enhance DC breakdown strength, and inhibit space charge accumulation. When the PPy@PS-NPs concentration is 0.5 wt%, the DC breakdown strength is 35.3 % higher than that of LLDPE. Mechanism research indicates that the depths of carrier traps are decreased due to high electron affinity caused by the introduction of PPy@PS-NPs, but the trap density is increased. The reported strategy of using functionalized polymer nanoparticles to improve the polymer insulation property provides new insights for developing future high-insulation materials and other functional materials based on functionalized polymer nanofillers.
研究领域:
材料科学
·
电气工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Mian Li,Lian-Yu Qiu,Tian-Yang Zhang,Bin Xu,Dan Yang,Ting Ye,Heng Luo
Advanced oxidation processes (AOPs) based on Fe 2+ /persulfate (PS) have been widely applied in water treatment but face critical challenges: inefficient radical utilization due to excess Fe 2+ scavenging, unsustainable reactivity from irreversible Fe 2+ -to-Fe 3+ conversion, and ambiguous dominant reactive species (e.g., SO 4 − / OH vs. high-valent iron). Ferric oxalate complexes address these limitations by enabling light-driven iron photoreduction and the Fe 2+ /Fe 3+ cycle. However, direct comparisons of degradation efficiency, mechanisms, and environmental risks between Fe 2+ /PS and UV/Fe(C 2 O 4 ) 3 3− /PS remain scarce. Using iohexol as a model, this study directly compared the two systems. The UV/Fe(C 2 O 4 ) 3 3− /PS system achieved 98.8 % iohexol degradation in 60 min (vs. 69.9 % for Fe 2+ /PS) and reduced iron sludge by 70–80 %. Both systems relied on SO 4 − and OH, but UV/Fe(C 2 O 4 ) 3 3− /PS enhanced radical yield via photocatalytic iron cycling, whereas Fe 2+ /PS depended on Fe(IV). In Fe 2+ /PS, contributions were Fe(IV) (29.4 %) > SO 4 − (25.9 %) > OH (20.2 %); in UV/Fe(C 2 O 4 ) 3 3− /PS, SO 4 − (63.6 %) > OH (23.7 %) > Fe(IV) (23.7 %). Electrical energy per order (EE/O) analysis showed UV/Fe(C 2 O 4 ) 3 3− /PS consumed 1.166 kWh mM −1 , 60.2 % lower than Fe 2+ /PS (2.524 kWh mM −1 ). Acute toxicity tests with Vibrio fischeri exhibited 67.7 % inhibition in Fe 2+ /PS, significantly higher than 36.4 % in UV/Fe(C 2 O 4 ) 3 3− /PS. Ecological Structure-Activity Relationships (ECOSAR) modeling and disinfection by-products (DBPs) risk assessment further confirmed lower risks in UV/Fe(C 2 O 4 ) 3 3− /PS, with 50 % lethal concentration ((LC 50 ) for aquatic organisms 2.3-fold higher and genotoxicity potency 41.7 % lower than Fe 2+ /PS. These results bridge the efficiency-risk gap between the two systems and offer a three-dimensional (efficiency-cost-safety) framework for AOP selection.
研究领域:
环境工程
·
水处理
·
化学氧化
·
毒理学
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自由基化学
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污染控制
·
高级氧化工艺
·
能源效率
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Miaomiao Ma,Yuhong Qi,Chuanjun Gu,Zhanping Zhang
Revealing the adsorption behavior of proteins on amphiphilic polymers is an interesting study. For the first time, the adsorption behavior of bovine serum albumin (BSA) protein on the surface of polyethylene glycol polystyrene (PEG-PS) amphiphilic polymer membrane is developed by molecular dynamics (MD) simulations and experiments. We found that PEG-PS has the ability to resist BSA protein adsorption. The adsorption of BSA on its surface undergoes a process of "rotation-preadsorption-desorption-final adsorption". After adsorption, the helical structure of BSA underwent "tight-loose-unwinding" changes. The transition from PEG chain helical structure to free coil structure is a key factor leading to the adsorption and desorption of BSA. Furthermore, the hydrophobic force of PS is the main driving force for BSA adsorption. These studies can inspire the design of amphiphilic materials to realize protein antifouling or transportation materials.
研究领域:
生物物理学
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材料科学
·
蛋白质工程
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 18
·11041-11048
·
IF 3.108
Yongqiang Li,Chao Zou,Jianzhong Shao,Xiangwu Zhang,Ya'nan Li
The preparation of superhydrophobic micro/nano fibers has been mainly focused on the use of electrospinning; however, practical applications are limited due to cost, scale and controllable research. Herein, we present a novel and simple centrifugal spinning technology that extrudes fibers from polymer solutions by using a high-speed rotary, perforated spinneret. By controlling the concentration of the spinning solutions and adjusting the spinning parameters, polystyrene (PS) fibers with different structures have been prepared. Since PS is a low surface energy material, the surface roughness can further increase the hydrophobicity of the fibers. We prepared hydrophobic SiO2 in different sizes, mixed them with PS dissolved in DMF, and SiO2/PS fibers were obtained by centrifugal spinning, where the maximum water contact angle of SiO2/PS fibers was 151° with superhydrophobicity. The typical surface of the silver ragwort leaf fibers with numerous grooves, and the lotus leaf with nano-protrusions, were successfully imitated on the centrifugally-spun SiO2/PS fiber surface. The as-prepared PS fibers were characterized by scanning electron microscopy and water contact angle/sliding angle measurements, and a processing–structure–performance relationship was established. Results demonstrate that the fiber morphology can be easily manipulated by controlling the spinning parameters, and centrifugal spinning is a promising approach for meeting the growing demand for the mass production of superhydrophobic micro/nano fibers.
研究领域:
材料科学
·
表面科学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Ruitian Bo,Jihua Wang,Chunfeng Wang,Yongliang Wang,Peigang He,Zhidong Han
The selective distribution of inorganic particles in polymer blends is of great significance in designing the composites with excellent properties such as dielectric properties . Molecular dynamics (MD) was applied in this paper to simulate the distribution of BaTiO 3 (BT) and graphene nanoplatelets (GNP) in polystyrene/polyvinylidene fluoride (PS/PVDF) blends. The models of PS and PVDF were built and the phase structure of the blends was simulated at the different PS/PVDF mass ratios. According to the results of solubility parameter and Flory-Huggins interaction parameter (χ), the immiscibility between PS and PVDF was illustrated and the phase transition phenomena were predicted. Combined with the SEM observations, the co-continuous structure of the blend at the PS/PVDF ratio of 6/4 was obtained at the maximal χ value. The binding energy and radial distribution function were calculated to predict the selective distribution of BT or GNP in PS/PVDF blends. According to the results of the MD simulations, the distribution of BT in the PVDF phase and GNP in the PS phase were successfully predicted, which were in good agreement with the experimental results by SEM observations and EDS element mapping. The MD simulations would be effective in building the co-continuous immiscible blends and predicting the selective distribution of functional fillers, which will be helpful for the investigation of functional composites with high performance.
研究领域:
材料科学
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Zhicheng Feng,Yinghua Li,Jianzhang Mai,Weixing Yang
Increasing air pollution poses a serious challenge to human beings. In view of the contradiction between filtration efficiency and pressure drop and the single function of traditional air filtration materials, the present study synthesized Cu-BTC by room temperature solvent method, and then based on the strategy of in-situ modification of Cu-BTC, Cu-BTC/PS-2 composite membranes with low filtration resistance and antibacterial resistance were constructed by modulating the pore structure of polystyrene (PS) fibre membranes. The composite membrane achieved 99.79 % filtration efficiency against PM 0.3 with a pressure drop of only 50.1 Pa. The stability of the composite membrane was significantly better than that of the commercial electret melt-blown filters, and the antimicrobial rate of the composite membrane against E. coli was greater than 99.9 %. This study provides a new material design strategy for the development of a new generation of high-efficiency, low-resistance and antibacterial air filtration materials.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Qianqian Zhang,Xueke Zhang,Nana Yan,Kaimin Chen
Pickering emulsion has attracted the attention of many researchers because of its good stability. In some cases, such as catalyst separation and drug release, control of emulsion stability and demulsification under mild temperature is required. In this work, temperature-sensitive PS@PNIPA (polystyrene@polyisopropylacrylamide) with controlled PNIPA thickness was applied as the Pickering solid emulsifier . The effect of PNIPA thickness on the Pickering emulsion formation was studied by Polarizing optical microscope (POM). PS@PNIPA concentration was also found to be related to the size of the emulsion and the droplet size could be controlled from 17 μm to 39 μm. By changing the temperature, the emulsification/demulsification process of Pickering emulsion is reversible and repeatable for several cycles. Using ibuprofen as a chemical model, the maximum ibuprofen release rate reaches 93% and can be tuned by the temperature. Therefore, this opens up more potential applications for temperature-induced controlled demulsification for chemicals release and related fields.
研究领域:
材料科学
·
药物递送
·
化学工程
✓ 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）