MACROMOLECULES
·
2026
·
IF 5.7
Hongtao Shan,Jiang Wang,Yi Wang,Jianjun Zhou,Hong Huo
Polystyrene-b-poly(ethylene-r-butylene)-b-polystyrene (SEBS) is an elastomer commonly blended with conjugated polymers (CPs) to enhance their electrical and mechanical performance. However, rational elastomer selection remains challenging, as the effects of the molecular structure of SEBS on blend structures and performance are poorly understood. In this work, we systematically investigate how the molecular structural characteristics of SEBS govern the microstructures and properties of CP/SEBS blend films by blending a brittle CP, poly[4-(4,4-dihexadecyl-4H-cyclopenta[1,2-b:5,4-b′]dithiophen-2-yl)-alt-[1,2,5]thiadiazolo[3,4-c]pyridine] (PCDTPT), with five SEBS elastomers that differ in terms of polystyrene/poly(ethylene-r-butylene) (PS/PEB) ratio, polar grafting, and molecular weight. Our findings reveal that the PS/PEB ratio determines the lateral phase-separation morphology types, such as continuous network/island-like domains, and vertical phase-separation morphology types, such as sandwich, gradient distribution, and inverse sandwich structures, in PCDTPT/SEBS blends. Compared with the crystalline microstructure, phase-separation, particularly lateral phase-separation, has more dominant effects on the electrical and mechanical performance of PCDTPT. An optimal PS content of approximately 30% in SEBS produces a favorable phase-separated morphology of the PCDTPT/SEBS blend, which holds potential for achieving good overall performance. Introducing carboxyl groups into SEBS results in the formation of noncovalent intermolecular hydrogen bonds with PCDTPT, thereby tuning the blend morphology and properties without altering the lateral and vertical phase-separated morphology types. Blending with low-molecular-weight carboxyl-grafted SEBS facilitates the formation of ordered PCDTPT nanofibers, thereby yielding the highest conductivity but the lowest crack onset strain (COS) among the blends. In contrast, blending with high-molecular-weight carboxyl-grafted SEBS improves PCDTPT/SEBS miscibility, reduces phase domain size, and prevents brittle nanofiber formation. This blend has the second-highest conductivity and the highest stretchability of all five blends studied. In this study, a clear relationship between the phase-separation morphology of PCDTPT/SEBS blends and the molecular structure characteristics of SEBS is established. These findings provide rational criteria for selecting SEBS elastomers for stretchable CP films with balanced electrical and mechanical performance.
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DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 7
·1596
·
IF 3.623
Peng Zhang,Yongqi Zhang,Xuan Wang,Jiaming Yang,Wenbin Han
Blending thermoplastic elastomers into polypropylene (PP) can make it have great potential for high-voltage direct current (HVDC) cable insulation by improving its toughness. However, when a large amount of thermoplastic elastomer is blended, the electrical strength of PP will be decreased consequently, which cannot meet the electrical requirements of HVDC cables. To solve this problem, in this paper, the inherent structure of thermoplastic elastomer SEBS was used to construct acetophenone structural units on its benzene ring through Friedel–Crafts acylation, making it a voltage stabilizer that can enhance the electrical strength of the polymer. The DC electrical insulation properties and mechanical properties of acetylated SEBS (Ac-SEBS)/PP were investigated in this paper. The results showed that by doping 30% Ac-SEBS into PP, the acetophenone structural unit on Ac-SEBS remarkably increased the DC breakdown field strength of SEBS/PP by absorbing high-energy electrons. When the degree of acetylation reached 4.6%, the DC breakdown field strength of Ac-SEBS/ PP increased by 22.4% and was a little higher than that of PP. Ac-SEBS, with high electron affinity, is also able to reduce carrier mobility through electron capture, resulting in lower conductivity currents in SEBS/PP and suppressing space charge accumulation to a certain extent, which enhances the insulation properties. Besides, the highly flexible Ac-SEBS can maintain the toughening effect of SEBS, resulting in a remarkable increase in the tensile strength and elongation at the break of PP. Therefore, Ac-SEBS/PP blends possess excellent insulation properties and mechanical properties simultaneously, which are promising as insulation materials for HVDC cables.Keywords:polypropylene;voltage stabilizer;HVDC cable;thermoplastic elastomer
研究领域:
材料科学
·
电气工程
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产品关联
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 8
·4057-4066
·
IF 5.503
Xueqiang Gao,HongMei Yu,Feng Xie,Jinkai Hao,Zhigang Shao
Anion exchange membrane fuel cells (AEMFCs) have attracted growing interest in recent years due to the favored electrochemical kinetics of the oxygen reduction reaction (ORR) and potential low cost, and development of high performance AEMs is always an urgent issue. In this work, a series of cross-linked AEMs with different diamine cross-linkers and various degrees of crosslinking based on the aryl-ether free tri-block copolymer SEBS were prepared using an in situ crosslinking method. FT-IR, XRF and EDS spectra confirm the structures and the degree of crosslinking of the AEMs. Moreover, the cross-linked AEMs demonstrated good mechanical properties and dimensional stability; the tensile strength reached 18.43 MPa (ca. 4.5 times higher than that of the membrane without crosslinking), and the swelling ratios of the cross-linked AEMs were only ca. 10%, which meet the requirement of the AEMFC application. In addition, the cross-linked AEMs demonstrated high ionic conductivity at relatively low IECs and water uptake, and the results of SAXS and TEM verified that the high conductivity could be attributed to the good hydrophilic/hydrophobic phase separation microstructure. Furthermore, in the test of H2/O2 AEMFCs, the MEAs fabricated using the cross-linked membranes displayed good fuel cell performance, especially for the C4-CQASEBS membrane, and the fuel cell realized a peak power density of 585 mW cm−2 at 60 °C. The results indicated that the cross-linked AEMs based on SEBS are a promising candidate material for fuel cell application.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Chuan Li,Qi Li,Ruihuan Ge
Paraffin based composite phase change materials (PCMs) have gained intensive attentions in low temperature thermal energy storage (TES) and management application domains because of its suitable melting temperature range and advanced thermoproperties. Seeking decent structural supporting materials (SSM) and the associated manufacturing approaches that capable of fabricating paraffin composites at appropriate temperatures to avert the thermal decomposition of the paraffin particularly for low-molecule ones are in high demand. Herein, we developed a low-molecule paraffin (RT18HC) composite through a simple blending approach by using styrene-ethylene/butylene-styrene (SEBS) as SSM, and showed that such SEBS-paraffin composites could be able to fabricate at a low operation temperature of 80 °C, significantly lower than that required for the preparation of conventional high density polyethylene (HDPE)-paraffin composites. To enhance the composite effective thermal conductivity , a micro-sized graphite power as enhancer was also involved over the fabrication process. Owing to the desirable solubility of paraffin in SEBS, a crosslinking structure inlaying paraffin and graphite was formed, endowing the composite with ability to maintain the structure stabilization and eliminate the graphite sedimentation over the repeated thermal cycles. 10 wt% of SEBS gives the composite optimum formulation at which 10 wt% graphite can be involved, and also an excellent shape stability and thermal adjustment ability can be achieved.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 62
·35429-35436
·
IF 2.936
Shumei Tang,Yu Xu,Gehong Su,Jianjun Bao,Aimin Zhang
Stretchable and flexible photoelectric materials are highly desirable for the development of artificial intelligence products. However, it remains a challenge to fabricate a stable, processable, and cost-efficient material with both high photoelectric sensitivity and remarkable deformability. Herein, a new kind of photoelectric sensitive, highly stretchable and environmentally adaptive materials was developed through in situ synthesis and π–π conjugation design. Specifically, a photoelectric elastomer zinc porphyrin SEBS(Zn-PorSEBS) was synthesized by introducing porphyrin to SEBS chain via a one-pot method. Then, graphene/zinc porphyrin SEBS (G/Zn-PorSEBS) composites were obtained by combing the elastomer with graphene sheets through solution blending. Notably, the resultant flexible composites were capable of capturing light changes with illumination on or off, and the maximum photocurrent density reached 0.13 μA cm−2. Moreover, the photoelectric composites exhibited a dramatic elongation (more than 1000%) and an excellent tensile strength about 20 MPa. This proposed strategy represents a general approach to manufacture photoelectric and flexible materials.
研究领域:
材料科学
·
光电化学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2017
·Vol. 35
·期 7
·887-896
·
IF 1.692
Zhao Dan,Xu Xiao-dong,Yuan Shuai-shuai,Yan Shun-jie,Wang Xiang-hong,Luan Shi-fang,Yin Jing-hua
Marine economy is seriously affected by marine biofouling, which has plagued people for thousands of years. Although various strategies have been developed to protect artificial surfaces against marine biofouling, cost-effective biofouling-resistant coating is still a goal in pursue. Herein, a cost-effective liquid-infused porous slippery surface (LIPSS) was facilely prepared by using poly(styrene- b -(ethylene- co -butylene)- b -styrene) (SEBS) elastomer to form microsphere surfaces, followed by infusing fluorocarbon lubricants into the porous structure. The as-prepared slippery surfaces were characterized by static water contact angle, sliding velocity and sliding angle analysis. We also investigated the adhesion behavior of Escherichia coli ( E. coli ) and limnetic algae on different surfaces. It is confirmed that the slippery surfaces have better anti-biofouling properties than the porous SEBS reference. This cost-effective approach is feasible and easily produced, and may potentially be used as fouling-resistant surfaces.
研究领域:
材料科学
·
海洋生物学
·
表面工程
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2026
·
IF 8.9
Ruiming Qin,Bo Liang,Wei Liao,Hui Jiang,Xintao Liao,Jianlong Zheng
PPA/SEBS composite asphalt exhibits excellent high-temperature performance. • PPA reduces the critical SEBS dosage required for a stable cross-linked network. • 0.8% PPA negligibly affects the composite asphalt’s low temperature performance. • The material’s aging resistance stems from synergistic shielding effects. SBS-modified asphalt suffers from bottlenecks such as inadequate thermal storage stability, poor resistance to UV and thermal oxidation, and high cost. This study aims to develop an alternative modified asphalt that offers superior storage stability, excellent rheological properties across a broad temperature range, and enhanced long-term durability. To this end, polyphosphoric acid (PPA) and styrene-ethylene/butylene-styrene block copolymer (SEBS) were utilized to synergistically modify asphalt. Dynamic shear rheometer (DSR) tests showed that the rutting factor (G*/sin δ) of the composite asphalt containing 1.2% PPA and 5% SEBS at 82℃ was 3.9 and 4.7 times greater than that of the asphalts containing 1.6% PPA or 6% SEBS, respectively. Quantitative fluorescence microscopy (FM) analysis revealed that PPA reduced the critical SEBS dosage required to form a cross-linked network and facilitated the formation of an Interpenetrating Polymer Network (IPN) structure in the composite modified asphalt. The composite asphalt with 0.8% PPA retained low-temperature flexibility (comparable BBR creep Stiffness and Creep Rate to the SEBS-modified asphalt) while exhibiting significantly superior aging resistance. Molecular dynamics simulations and FTIR analysis elucidated the potential mechanism involved in the modification process. It was found that PPA, via passivation and steric protection on the chains of SEBS, effectively inhibited the formation of characteristic oxidation products, such as C O and S O groups, during aging. This led to a marked enhancement in the material's resistance to thermo-oxidative degradation. In conclusion, the PPA/SEBS composite simultaneously enhances asphalt performance and reduces cost, providing a strong rationale for developing high-performance, durable, and economical pavement materials.
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DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
YueChao Zhao,Fei Fang
Flexible biomimetic photonic structures, capable of achieving dynamic radiation modulation in both solar and infrared (IR) bands as required, are increasingly catering to low-energy thermal management and sustainable development. Herein, the cephalopod-inspired composite film of styrene-ethylene-butene-styrene block copolymer (SEBS)/titanium dioxide (TiO 2 )-Mxene has been designed and prepared. Analogous to squid leucophores, the SEBS/TiO 2 layer of is able to regulate solar reflection and transmit infrared radiation. Mimicking squid iridocytes, the Mxene layer can regulate infrared reflection and absorb sunlight. The optimal structural parameters of the film and the regulation contrast were estimated via theoretical analysis. The theoretical design also illustrates that the two layers collaborate without interference. According to the optimal parameters, the Mxene-SEBS/TiO 2 film was prepared. A dynamic regulation between radiative heating and cooling, namely, the solar reflection between 38 % and 66 % and infrared emissivity between 68 % and 89 % can be realized via mechanical actuation under 200 % strain. As the solar radiation is ∼650 W/m 2 , the composite film achieves ∼6.2 °C heating/∼1.4 °C cooling of the skin under mechanical actuation. When reducing the natural convection loss, the film further achieves ∼11.6 °C heating/∼0.8 °C cooling of the skin. This work provides a novel system and strategy for radiation modulation in solar-infrared bands for possible applications in thermal management.
研究领域:
材料科学
·
能源科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 12
·2847
·
IF 3.426
Ming Zhu,Ruifeng Zhang,Gang Chen,Wenjun He,Yaowei Chen,Deng-Guang Yu,Xiaoyan Li
In this paper, CNTs@PANi nanocomposites were prepared by in-situ oxidation polymerization of aniline, and their structure, morphology and conductivity were characterized. A mixed solvent of toluene and tetrahydrofuran was used to prepare dispersions of CNTs@PANi and poly(styrene-ethylene-butylene-styrene) (SEBS) triblock copolymer, and bilayer composite film was prepared. According to the solvent phase separation and uneven evaporation flux, CNTs@PANi self-assembled into the interconnected coffee ring structure on the SEBS matrix. The prepared bilayer composite film had excellent stretchability, and the conductivity of the functional layer was close to that of CNTs@PANi, which could light up an LED lamp under 100% strain and restore the topological structure. Electrochemical tests showed that the bilayer film had obvious heterogeneity. The impedance characteristics of the CNTs@PANi functional layer and the SEBS matrix were analyzed, and its heterogeneous corrosion resistance mechanism further discussed.Keywords:self-assembling;coffee ring;CNTs;PANi;stretchable;SEBS triblock copolymer
研究领域:
材料科学
·
电子工程
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DOI
PubMed
高影响因子
Nano Materials Science
·
2021
·
IF 0
Tianqi Liang,Jie Liu,Zhaoyang Wei,Dean Shi
In this study, CuO nanoparticles are pre-modified with styrene-maleic anhydride copolymers (SMAs) of different molecular weights and MAH contents. Then the pre-modified CuO nanoparticles (CuO-SMAs) are added to the PA6/SEBS (Styrene Ethylene Butylene Styrene copolymer) (40/60 wt/wt) polymer blends with a co-continuous morphology. When SMA3 (MAH = 8 wt%, M n = 250000 g/mol) is used to modify CuO nanoparticles, and the grafting degree of SMA3 on the surface of CuO reaches 2.74 wt%, 90.71% of the added mCuO-SMA3 nanoparticles can be located at the interface of PA6 and SEBS. A porous PA6 membrane with CuO nanoparticles located at the pore walls can be obtained after the SEBS phase is etched with xylene. The catalytic reaction velocity constant (k) for the reduction of p-nitrophenol in NaBH 4 solutions with the PA6/mCuO-SMA3 porous membrane can reach 1.0040 min -1 . This work provides a feasible and straightforward method for the preparation of porous polymer membranes with functional nanoparticles located at the wall of the pores.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
npj Flexible Electronics
·
2022
·Vol. 6
·期 1
·1-10
·
IF 12.019
Xu Zihan,Han Yunfei,Bai Yuanyuan,Chen Xingze,Guo Jingbo,Zhang Lianping,Gong Chao,Luo Qun,Zhang Ting,Ma Chang-Qi
Stable interface adhesion and bending durability of flexible organic solar cells (FOSCs) is a basic requirement for its real application in wearable electronics. Unfortunately, the device performance always degraded during continuous bending. Here, we revealed the weak interface adhesion force between MoO 3 hole transporting layer (HTL) and the organic photoactive layer was the main reason of poor bending durability. The insertion of an interface bonding layer with a thermoplastic elastomer, polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) effectively improved the interface adhesion force of MoO 3 HTL and the active layer and decreased the modulus, which ensured higher than 90% of the initial efficiency remaining after 10000 bending. Meanwhile, the FOSCs gave an efficiency of 14.18% and 16.15% for the PM6:Y6 and PM6:L8-BO devices, which was among the highest performance of FOSCs. These results demonstrated the potential of improving the mechanical durability of FOSCs through thermoplastic elastomer interface modification.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Fanghui Wang,Conghui Li,Jing Sang,Yahui Cui,Hong Zhu
By choosing a triple block polymer , poly(styrene- b -(ethylene- co -butylene)- b -styrene) (SEBS), as the backbone and adopting a long side-chain double-cation crosslinking strategy, a series of SEBS-based anion-exchange membranes (AEMs) was successively synthesized by chloromethylation , quaternization , crosslinking, solution casting , and alkalization. The 70C16-SEBS-TMHDA membrane showed high OH − conductivity (72.13 mS/cm at 80 °C) and excellent alkali stability (only 10.86% degradation in OH − conductivity after soaking in 4-M NaOH for 1700 h at 80 °C). Furthermore, the SR was only 9.3% at 80 °C and the peak power density of the H 2 /O 2 single cell was up to 189 mW/cm 2 at a current density of 350 mA/cm 2 at 80 °C. By introducing long flexible side chains into a polymer SEBS backbone, the structure of the hydrophilic–hydrophobic microphase separation in the membrane was constructed to improve the ionic conductivity . Additionally, network crosslinked structure improved dimensional stability and mechanical properties .
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）