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
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Yue Shi,Zhongfu Zhao,Wei Liu,Chunqing Zhang
Two kinds of commercially available poly(styrene-b-butadiene-b-styrene) copolymers (SBS1301 and SBS1401) with 86–87% of 1,4-butadiene units were modified to fabricate robust poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) anion exchange membranes (AEMs) via sequential hydrogenation, chloromethylation, quaternization, and alkalization. Its poly(ethylene-co-butylene) phase could provide a physically self-cross-linked structure responsible for the mechanical stability of AEMs, due to the crystalline behavior (Tm = ∼80 °C and ∼20% of crystallinity) of polyethylene segments after the hydrogenation of 1,4-butadiene units. The polystyrene phase was liberated from the chemical cross-linking structures to focus on conducting ion transport. Different from commercial SEBS based AEMs, this specially designed microphase separation structure led to low swelling ratio, high water uptake, and good hydroxide conductivity (e.g., ∼12%, ∼80%, ∼81 mS cm–1 at 80 °C) at moderate ion exchange capacity (IEC = 1.48 mmol g–1) for the SEBS1401-OH AEMs made from SBS1401. The single cell using SEBS1401-OH has a peak power density as high as 320 mW cm–2 while the current density achieves 860 mA cm–2. These results indicate that the proposed method can develop high-performance SEBS based AEMs, suitable for fuel cell applications.
研究领域:
材料科学
·
化学工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 8
·1-12
·
IF 3.061
Liu Fengshuo,Wahid Umar,Zhao Zhongfu,Liu Wei,Zhang Chunqing
Poly(styrene-b-(ethylene-co-butylene)-b-styrene) copolymer (SEBS) has been widely used for anion exchange membranes (AEMs). However, it is still challenging to improve the dimensional stability of SEBS based AEMs because their main component poly(ethylene-co-butylene) phase (PEB) is rubbery. To this end, chemical crosslinking is widely built within the polystyrene phase (PS), but which still makes the PEB phase contribute nothing to the dimensional stability and ionic conductivity. Herein, we attempt to synthesize poly(styrene-b-butadiene-b-styrene) copolymers (SBS) owning adjustable content of 1,4-butadiene units via living anionic polymerization, following with hydrogenation. As more 1,4-butadiene units are copolymerized into SBS, the PEB phase becomes even harder, which significantly enhances the comprehensive performance of AEMs. The AEMs intentionally maximized by this approach not only have ultrahigh dimensional stability (i.e. 23.2 ± 0.1 of WU, 3.8 ± 0.1 of SR at 30 °C, nearly no change within 30 ~ 80 oC), but also exhibit a comparable hydroxide conductivity (~ 85 mS cm −1 at 80 °C with IEC as 1.06 ± 0.05 mmol/g). The membrane electrode assembly made from such AEM has a peak power density 370 mW cm −2 at a current density of 800 mA cm −2 . This work provides a straightforward approach for fabricating long term alkaline durable and mechanically stable SEBS based AEMs, suitable for fuel cells application.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2023
·
IF 5.8
Min Du,Jianing Zhang,Jing Jin,Wei Jiang
Poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) with eminent elasticity, thermoplastic ability, and biological stability has aroused great interest in the medical area. However, bacteria can easily adhere to the hydrophobic SEBS surface to cause medical device-related infections. In this work, SEBS is modified to prepare the SEBS-polydopamine (PDA)-poly(lysine) quaternary ammonium derivative (PLQ) antibacterial surface by PDA deposition and surface grafting techniques to solve bacterial infections. PDA is used as an intermediate layer and presents an excellent photothermal effect. The grafted polymer PLQ has antimicrobial quaternary ammonium cation groups, which plays synergistic bactericidal therapy with PDA. The SEBS–PDA-PLQ surface almost totally suppresses the growth of bacteria with a surface bacterial survival rate of 0.05% under laser irradiation. The outstanding antibacterial activity of the SEBS–PDA-PLQ surface is attributed to the synergistic effects of the photothermal performance of PDA and quaternary ammonium cationic functional groups of PLQ. In addition, the membrane SEBS–PDA-PLQ shows good hydrophilicity, antiprotein adsorption ability, chemical stability, and biocompatibility. This antibiotic-free antimicrobial approach has great potential for practical application in solving infections associated with medical devices.
研究领域:
材料科学
·
生物医学工程
·
表面化学
·
抗菌技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Sijia Ren,Jiachun Feng
Poly(styrene-b-[ethylene-co-butylene]-b-styrene) (SEBS)/paraffin system is a promising class of shape memory polymers and the transition temperature of such materials could be flexibly regulated by choosing different paraffins. However, the difference in shape memory performance of SEBS/paraffin blends containing paraffin with same content but different melting temperature ( T m ) has not been comparatively studied. In this work, two series of SEBS/paraffin blends containing same content paraffin (30 and 70 wt%, respectively) with T m of 28.5 and 61.3 °C (denoted as P L and P H , respectively) were prepared and their shape fixing ratios (R f s) under conventional shape memory (CSM) and reversible plasticity shape memory (RPSM) programming methods were investigated. It was found that these blends with the same paraffin content showed different R f s regardless of the programming method. For example, the 30 wt% P H -containing sample exhibited higher R f under CSM programming, while the 70 wt% P L -containing sample showed higher R f under RPSM programming. By investigating microstructural changes, a possible explanation for the shape memory performance of SEBS/paraffin blends containing paraffin with different T m was proposed. This work was helpful to deepen the understanding of shape memory mechanism and broaden the application of SEBS/paraffin-based shape memory polymers.
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
Advanced Materials Technologies
·
2022
·Vol. 7
·期 12
·2200339
·
IF 8.856
Sijia Ren,Jiachun Feng
Shape-morphing materials that can exhibit various shape deformations are highly desirable. In this work, shape-morphing materials with diverse deformation modes are prepared via a facile approach of constructing bilayer structures of SEBS/paraffin blends with different melting temperatures. The bilayer films are prepared using a simple solvent-coating adhesion method, either by adhering two single-layers together and stretching or by adhering two pre-stretched single-layers. These bilayer films show strong interfacial adhesion due to the similar chemical composition of the two layers. By adjusting the programming method, stretching strain, and thickness ratio, the shape deformation behaviors of the resultant bilayer films can be flexibly tuned. To demonstrate the wide applicability of this approach, several 2D sheets with hinge structures as well as a smart dressing are prepared, in which the former can be transformed into 3D configurations and the latter can automatically fit to the human body and peel off. Owing to the advantages of low cost, easy and large-scale preparation, recyclability, and high designability, the approach for preparing shape-morphing bilayer films proposed by this work is versatile and the obtained bilayer films have the potential to satisfy the demands of divergent application fields.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
ENERGY AND BUILDINGS
·
2023
·
IF 6.7
Yangjiu Zhao,Shaowei Shen,Xinya Wang,Ruirui Cao,Xiaoyong Jia,Xiling Niu,Haihui Liu,Xingxiang Zhang
Phase change materials (PCMs) can alleviate concerns about energy to a certain extent by reversibly storing a plenty of renewable and sustainable thermal energy. However, they do not have any flexibility due to their liquid leakage and solid rigidity, making them unsuitable for further practical wearable applications. Herein, a series of SEBS/ n -alkane PCM composite films (PCMFs) were fabricated. SEBS is mainly used as the supporting substrate to prevent the leakage of liquid n -alkanes and endue the PCMFs with excellent mechanical properties. Where, the tensile strain and tensile strength of SEBS/ n -HD-50% PCMF separately are 780% and 9.96 MPa, representing excellent stretchability and deformability, tailorability, and foldability. Particularly, the onset melting and crystallization temperatures ( T mo , T co ) of SEBS/ n -ES-50% and SEBS/ n -DS-50% PCMFs individually are 28.1 °C and 28.4 °C, 33.8 °C and 35.7 °C, which match the comfort zone for human skin and the ideal thermo-response temperature range of smart windows, and a range of experiments have verified their feasibility in the fields of thermal management, smart windows and infrared stealth. This study well solves the problems of liquid leakage and solid rigidity of PCMs themselves, endows them with excellent comprehensive performance, and greatly expanding the practical applications of PCMs.
研究领域:
材料科学
·
热工程
·
复合材料
·
能量存储
·
可穿戴技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Jiale Huang,Linfeng Lan,Bo Huang,Jiayi Pan,Baozhong Chen,Qi Zhou,Huimin Su,Jintao Xu,Jiajun Lin,Yutian Liu,Yang Lu,Simeng Gong,Junbiao Peng
Recent advancements in organic electronics highlight the potential of stretchable organic field-effect transistors for neuromorphic applications. However, maintaining a high electrical performance under mechanical strain remains a critical challenge. Here, we present a stretchable organic synaptic transistor with a phase-separating method. By blending poly(3-hexylthiophene) (P3HT) with styrene–ethylene–butylene–styrene (SEBS), P3HT–SEBS phase-separated films were obtained that combine high mechanical stretchability with good charge transport property. The organic synaptic transistors (OSTs) were able to withstand a mechanical strain of greater than 80%. Remarkably, by combining SEBS-induced stress dissipation with ionic gel-driven synaptic modulation, the OSTs were able to mimic synaptic dynamics under strain, facilitating neurobiological behaviors. Our work addresses the critical need for strain-resilient organic devices in next-generation human–machine collaboration.
研究领域:
有机电子学
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神经形态工程
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材料科学
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可拉伸电子学
·
合成生物学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Guojun Weng,Jianming Yang,Jianjun Li,Jian Zhu,Junwu Zhao
Surface-enhanced Raman scattering (SERS) based on rigid substrates has been widely used in biomedical detection due to its high sensitivity and specificity. However, the tedious operation steps for preparing SERS rigid substrates limited their applications in real-world detection. Compared with general rigid substrate, the flexible substrate has the advantages of simple preparation and easy portability, which are suitable for rapid, wearable and personalized detection in the field of point-of-care test. Herein, the flexible SERS substrates employing copolymer were fabricated and used for detection of skin cortisol, a biomarker for evaluating psychological stress in sweat. Silver triangle nanoplates with sharp corner were used as enhanced particles, and transferred to polyvinyl chloride/styrene-ethylene-butene-styrene copolymer (PVC/SEBS) film through three-phase interface self-assembly. By adjusting the size of silver nanoparticles, the ratio of PVC to SEBS in the polymer film, and the number of transfers of self-assembled silver films, the enhancement effect of the flexible SERS substrate was maximized. In addition, functionalization of the flexible SERS substrate with cortisol antibodies is used to achieve specific detection of cortisol on the skin surface. Under the optimal conditions, the Raman peak intensities at 1268 and 1500 cm −1 of the cortisol had a good linear relationship with the logarithm of its concentration in the range of 10 −7 to 10 −3 M, and the detection limits were 5.47 × 10 −8 M and 5.51 × 10 −8 M, respectively. The flexible silver triangle nanoplates SERS substrate constructed by self-assembly in the three-phase interface has the characteristics of good specificity and high sensitivity, which has potential for transdermal cortisol wearable detection, providing a feasible method for the rapid evaluating psychological stress level.
研究领域:
生物医学工程
·
分析化学
·
材料科学
·
可穿戴技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Na Yu,Jianhao Dong,Huanhuan Li,Tingting Wang,Jingshuai Yang
Polystyrene- b -poly(ethylene-co-butylene)- b -polystyrene (SEBS) has attracted more and more attention recently for using as the matrix of anion exchange membranes (AEMs) in fuel cells due to its low cost, superior mechanical properties and ether-free total C-C bond backbone. In this work, the short side chain of chloromethyl and long side chain of bromohexanoyl groups are grafted into the SEBS copolymer via the chloromethylation and Friedel-Crafts acylation reactions. After quaternized by different nitrogen heterocyclic compounds including 1-methylimidazole (Im), 1-methylpyrrolidine (Mpy), N -methylpiperidine (Pip) and 2-methyl-1-pyrroline (Mpyl), various SEBSC n - x AEMs are prepared. Combing with small molecule model experiment results, Mpy and Pip cations grafted SEBS membranes are confirmed to possess good alkali resistance, while SEBSC1- x membranes with Im and Mpyl cations are not suitable for AEMs due to their poor alkaline stability. Meanwhile, long side-chain cation grafted SEBSC6- x AEMs with lower ion exchange capacity (IEC) values exhibit higher water uptake, ionic conductivity and mechanical strength simultaneously comparing with short side-chain cation grafted SEBSC1- x AEMs. As an example, the SEBSC6-Pip membrane with an IEC of 0.48 mmol g −1 exhibits a water uptake of 47% at 80 °C, an OH − conductivity of 57.7 mS cm −1 at 80 °C, a tensile strength of 52 MPa at room temperature, and a conductivity retention percent of 75% after 600 h in 1 M KOH at 80 °C, demonstrating a big potential for the AEM fuel cell application.
研究领域:
高分子科学
·
膜技术
·
燃料电池
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chen Chen,Fructueux Modeste Amona,Junhao Chen,Xiaohan Chen,Yongding Ke,Shuangcheng Tang,Jinming Xu,Xi Chen,Yipeng Pang
Wound healing is a complex biological process that can trigger inflammation and oxidative stress and impair myofibrillogenesis and angiogenesis. Several advanced wound-dressing nanocomposite materials have been designed to address these issues. Here, we designed a new multifunctional styrene–ethylene–butylene–styrene/silver nanowire (SEBS/AgNWs)-based nanocomposite film with antimicrobial, antioxidant, and anti-inflammatory properties to promote wound healing. The porous morphological structure of SEBS/AgNWs enhances their antimicrobial, antioxidant, and anti-inflammatory properties. SEBS/AgNWs significantly inhibited the growth of Staphylococcus aureus, methicillin-resistant Staphylococcus aureus, and Escherichia coli strains, effectively wiping out ABTS•+, DPPH•, hydrogen peroxide (H2O2), and hydroxyl (•OH) radicals, showing their effective ROS-scavenging properties. It further showed significant antioxidant properties by increasing the levels of enzyme-like catalase (CAT), superoxide dismutase (SOD), and glutathione (GSH), while decreasing malonaldehyde (MDA) levels. Additionally, SEBS/AgNWs reduced the expression of interleukin-1β (IL-1β), IL-6, and tumor necrosis factor-α (TNF-α), while increasing levels of transforming growth factor- β (TGF-β), vascular endothelial growth factor-A (VEGF), and CD31 in wound healing. This suggests that applying a multifunctional nanoplatform based on SEBS/AgNWs could enhance wound healing and improve patient outcomes in wound care management.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
伤口护理
·
药学
✓ 已验证
DOI
PubMed
高影响因子
Polymers
·
2019
·Vol. 11
·期 6
·1033
·
IF 3.164
Wei Dong,Xuan Wang,Zaixing Jiang,Bo Tian,Yuguang Liu,Jiaming Yang,Wei Zhou
Acetophenone can significantly improve the dielectric properties of polyethylene (PE) insulation materials. However, it easily migrates from the PE due to its poor compatibility with the material, which limits its application. In this paper, the functional units of acetophenone were modified in polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (SEBS) by an acetylation reaction, and SEBS was used as the carrier to inhibit the migration of acetophenone. The number of functional units in the acetylated SEBS (Ac-SEBS) was measured by1H NMR and the effect of the acetylation degree of SEBS on its compatibility with PE was studied. Meanwhile, the effects of Ac-SEBS on PE’s direct current (DC) breakdown strength and space charge accumulation characteristics were investigated. It is demonstrated that Ac-SEBS can significantly improve the field strength of the DC breakdown and inhibit the accumulation of space charge in the PE matrix. This work provides a new approach for the application of aromatic compounds as voltage stabilizers in DC insulation cable materials.Keywords:polyethylene;voltage stabilizer;insulation material;DC breakdown strength;space charge
研究领域:
材料科学
·
电气工程
✓ 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）