JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Wei Jin,Rongrong Wang,Xirong Huang
The horseradish peroxidase (HRP) mediated synthesis of conducting polyaniline (PANI) was investigated in detail in the bicontinuous microemulsion stabilized by both sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and dodecyl sulfobetaine (SB-12). The addition of zwitterionic surfactant SB-12 not only reduces the phase inversion temperature of the anionic surfactant AOT stabilized microemulsion, but also enhances the catalytic performance of the solubilized HRP. Compared with the previously reported AOT/SDS stabilized bicontinuous microemulsion, the present AOT/SB-12 stabilized bicontinuous microemulsion is much more suitable for the expression of the catalytic activity of HRP; moreover, the conductivity of the resulting PANI improves greatly (a 15-fold increase in conductivity). The present results indicate further that the catalytic activity of HRP and its stability are crucial for the biosynthesis of PANI in bicontinuous microemulsions. To understand the underlying mechanism of the medium effects, electron spin resonance (ESR), UV–vis-NIR and small-angle X-ray scattering (SAXS) spectroscopies were used to investigate the effects of the oil-to-water ratio ( α ) and the surfactant concentration ( γ ) of the present bicontinuous microemulsion on the conductivity of resulting PANI. Results show that the bicontinuous microemulsion stabilized by both AOT and SB-12 still has a template role in the biosynthesis of PANI and the PANI conductivity is mainly determined by the microstructure of the template and by the microstructure-dependent activity and stability of the solubilized HRP. Lower α and γ values are beneficial to the enzymatic synthesis of high-quality PANI. The present study is of great help not only to deepen the understanding of the template role of anionic surfactant aggregates in the biosynthesis of conducting PANI, but also to develop new strategies for the biosynthesis of high quality PANI.
研究领域:
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Junzhi Li,Min Wang
Structures having continuous porous networks are of great interest for applications in areas such as separation, energy storage, and tissue engineering. Bicontinuous interfacially jammed emulsion gels (“bijels”) have been actively investigated as templates for fabricating useful structures for such applications. However, the fabrication of bijels-templated porous nanocomposites incorporated with reinforcing or functional nanoparticles (or nanofibers) to provide specific, targeted functions is still a challenge, stemming from the difficulties of fabricating functional nanoparticle-containing bijels. In this study, bijels-derived porous nanocomposites incorporated with multiwalled carbon nanotubes (MWCNTs), which possessed interconnected channels inside the structures, were made via a facile phase inversion technique for bijels fabrication. For the composite manufacture, in the first step of bijels fabrication, MWCNT adsorption into the oil phase of bijels was observed. It was revealed that MWCNTs were physically absorbed into the oil-rich phase without disrupting the bicontinuous structure of bijels. The successful fabrication of non-crosslinked and crosslinked porous structures containing MWCNTs was evidenced through imaging by confocal laser scanning microscopy and scanning electron microscopy, respectively. For potential controlled release applications, an anticancer drug, doxorubicin hydrochloride (DOX), was incorporated into bijels-derived structures and nanocomposites. The in vitro DOX release profiles from drug delivery systems based on bijels-derived MWCNT-containing nanocomposites suggested that the photothermal effect of MWCNTs initiated by near-infrared irradiation could modulate the drug release behavior. Overall, this study has developed a facile approach to fabricate bijels-templated bicontinuous porous structures incorporated with functional nanoparticles (or nanofibers) and opened an avenue for making MWCNT-containing porous nanocomposites for controlled drug release applications.
研究领域:
材料科学
·
生物医学工程
·
药物递送
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULES
·
2021
·
IF 5.985
Hanyu Wu,Fengxian Xu,Guanzhen Gao,Xunda Feng
Polymerization of bicontinuous cubic (Q) liquid crystals (LCs) can be utilized to produce technologically useful polymeric materials with 3-D interconnected nanopores of ∼1 nm. However, their practical applications have been hindered by the exceptionally complicated syntheses of the needed polymerizable amphiphiles and the susceptible morphological destruction upon polymerization. Here, we present a scalable strategy to fabricate polymeric membranes with 3-D interconnected nanopores by photo-crosslinking of easily accessible Q LCs. We leverage a readily synthesized, cost-effective zwitterionic monomer as the building block to construct “normal” lyotropic double gyroid (G1) mesophases that afford radical polymerization. Although self-assembly of the amphiphile in neat water forms no Q LCs, additional phosphoric acid can drive the emergence of G1 mesophases by inducing the non-constant interfacial curvature. An intriguing advantage exhibited by this polymerizable G1 system is the ability to persist upon swelling by large volumes of commercially available cross-linkers, thereby effectively facilitating structural lock-in through photo-initiated cross-linking. High-brilliance synchrotron small-angle X-ray scattering has unambiguously confirmed the excellent retention of periodic G1 morphologies in the mechanically robust polymers. Transmission electron microscopy further provides unprecedented, detailed visualization of the spacing and symmetry in the cross-linked G1 assemblies over large areas. The exceptionally easy access to the building blocks and the high-fidelity structural preservation enable the scalable fabrication of nanoporous membranes for applications such as ionic transportation, as preliminarily demonstrated.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Haimo Zhang,Jun Zhong,Huilong Xu,Xuanyu Shi,Li Yang,Shihao Sun,Yihu Song,Min Zuo,Qiang Zheng
Bicontinuous structured nanocomposites with nanoparticles (NPs) assembled at the interface between two fluids have a wealth of proposed applications. Here, we used a universal and facile strategy to prepare such various bicontinuous stable nanocomposites filled with homopolymer-brush grafted NPs of various dimensions. We investigated the detailed formation of such nanocomposites online and proposed a model to fit and predict the effect of NPs at the interface on the domain coarsening of blend matrix and further stabilizing their bicontinuous morphology, based on the influence of NPs percolation on the time-dependent effective interfacial tension. The morphology evolution of nanocomposites can be predicted from the volume fraction of NPs, annealing time and temperature, which may provide some guidelines for the design and preparation of bicontinuous structured nanocomposites with the controllable and stable structure.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Science Advances
·
2024
·Vol. 10
·期 10
·
IF 11.7
Ziguang Zhao,Ziquan Cao,Zhixin Wu,Wenxin Du,Xue Meng,Huawei Chen,Yuchen Wu,Lei Jiang,Mingjie Liu
Currently, it remains challenging to balance intrinsic stiffness with programmability in most vitrimers. Simultaneously, coordinating materials with gel-like iontronic properties for intrinsic ion transmission while maintaining vitrimer programmable features remains underexplored. Here, we introduce a phase-engineering strategy to fabricate bicontinuous vitrimer heterogel (VHG) materials. Such VHGs exhibited high mechanical strength, with an elastic modulus of up to 116 MPa, a high strain performance exceeding 1000%, and a switchable stiffness ratio surpassing 5 × 103. Moreover, highly programmable reprocessing and shape memory morphing were realized owing to the ion liquid–enhanced VHG network reconfiguration. Derived from the ion transmission pathway in the ILgel, which responded to the wide-span switchable mechanics, the VHG iontronics had a unique bidirectional stiffness-gated piezoresistivity, coordinating both positive and negative piezoresistive properties. Our findings indicate that the VHG system can act as a foundational material in various promising applications, including smart sensors, soft machines, and bioelectronics.
研究领域:
材料科学
·
软体机器人
·
生物电子学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Nan Sun,Shucheng Mo,Yuanhang Cai,Yingshuai Zhao,Yaling Han,Yijun Zheng,Tao He
Forward osmosis (FO) has shown great promise in concentrating enriched lithium brine during lithium extraction from salt-lake brine due to low energy consumption and ecologically friendliness. The effective utilization of enormous osmotic pressure of freely available MgCl 2 onsite requires highly selective FO membranes with high flux, which calls for thin-film composite forward osmosis (TFC-FO) membranes of highly interconnected substrate and defect-free separation layer. Herein, for the first time, we employed 2-Pyrrolidone (2-PD) as the solvent to prepare FO substrates via the non-solvent induced phase separation (NIPS) for preparing TFC FO membranes. Owing to its weak solubility, the PSf/2-PD polymer solution shows high viscoelasticity, resulting in spinodal demixing and a bicontinuous porous structure, unlike the closed finger-like pore structure observed in the PSf/DMAc binary system. By further reducing the casting humidity and coagulation bath temperature, the substrate surface pore size was optimized to prepare high-performance TFC-FO membranes: the TFC-30%-3 exhibits a water flux of 20.0 LMH and low specific reverse salt flux of 0.23 g/L at AL-FS mode, showing competitive performance compared to the state-of-the-art membranes. These results imply that 2-PD, as an environmentally friendly alternative to traditional solvents, shows significant promise for FO substrate preparation using a simple polymer/solvent binary system.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2024
·
IF 5.5
Fengyi Wang,Xiangji Li,Jiahao Liu,Jianqiang Wang,Jinghui Zhang,Hongtao Chen
Background The demand for high-power density packaging and integration processes for third-generation semiconductors, like silicon carbide (SiC), necessitates advancements beyond conventional Si-based packaging technologies. Cu-Cu direct bonding emerges as a promising alternative in semiconductor packaging. However, achieving Cu-to-Cu direct bonding with low-temperature, low-pressure, and short-time poses significant challenges. Transient Liquid Phase Bonding (TLP) offers a low-temperature joining solution, but prolonged reflow time hinders its wide applications. Methods This study introduces a novel strategy utilizing bicontinuous microemulsion (BME) electrodeposition to fabricate micron-sized Cu arrays, addressing these challenges in achieving Cu bonding. The core of Cu array manufacturing lies in the differential electrodeposition rate of Cu ions in the aqueous and organic phases. This principle is rooted in the excellent conductivity of the aqueous solution compared to the non-conductivity of the organic solution. Significant findings We elucidate the growth mechanism and validate a theory for achieving void-free optimal growth of Cu arrays within BME and compared the cross-sectional morphology and fracture modes of TLP solder joints with micron and nano Cu arrays. Furthermore, the ability to recycle the BME soft template aligns with green chemistry principles, offering a sustainable die-attach approach for third-generation semiconductor device packaging.
研究领域:
材料科学
·
半导体封装
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 11
·期 4
·905-913
·
IF 7.571
Yan Qiu,Liang Wu,Sijun Liu,Wei Yu
High performance hydrogels have essential applications in many fields such as tissue engineering and soft robot. Herein, we develop an impact resistant hydrogel composed of bicontinuous structures of polymer-hard phase and polymer-soft phase. This unique bicontinuous phase structure is formed by modulating various hydrogen bonding interactions. During loading, the polymer-hard phase is broken accompanied by the dissociation of hydrogen bonds to dissipate energy, while the polymer-soft phase distributes the load to avoid stress concentration, thus enabling the bicontinuous hydrogel to achieve excellent strength and toughness simultaneously. Furthermore, the fracture of hierarchical energy dissipation structures efficiently reduces impact strength and increases buffer time. Owing to the synergy of the bicontinuous phase structure and hierarchical energy dissipation, the resulting bicontinuous hydrogel remains intact even if it undergoes impact at a strain rate of ∼13 000 s−1. Based on these findings, it is expected that the bicontinuous hydrogel has a potential application in the field of articular cartilage repair.
研究领域:
材料科学
·
生物医学工程
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 21
·12969-12975
·
IF 3.269
Yue Zhang,Yudai Huang,Yakun Tang,Hongyang Zhao,Yanjun Cai,Xingchao Wang,Yong Guo,Dianzeng Jia,Jun Zong
Bicontinuous hierarchical mesoporous LiFePO4/C (BHM-LFP/C) microbelts have been synthesized using a simple dual-solvent electrospinning method for the first time. The use of a dual-solvent is beneficial for the electrospinning synthesis, which increases the salt solubility, as well as decreases the surface tension to improve the spinnability. The sample exhibits a high reversible capacity (153 mA h g−1 at 0.5C), and achieves an excellent high rate cycling performance. The enhanced electrochemical performance can be attributed to the unique microbelts providing bicontinuous electron/ion pathways, and the thoroughly mesoporous structure facilitating electrolyte penetration, especially for hierarchical architectures, which have three-dimensional diffusion channels for Li+. This method can be extended to fabricate other electrospun multi-element oxide cathode materials for advanced lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Min Ren,Mengmeng Zhang,Zaiyan Hou,Xinghao Yan,Lianbin Zhang,Jiangping Xu,Jintao Zhu
Bicontinuous microparticles have advanced transport, mechanical, and electrochemical properties and show promising applications in energy storage, catalysis, and other fields. However, it remains a great challenge to fabricate bicontinuous microparticles of block copolymers (BCPs) by controlling the microphase separation due to the extremely narrow region of a bicontinuous structure in the phase diagram. Here, we demonstrate a strategy to balance the phase separation of BCPs and fluorinated additives at different length scales in emulsion droplets, providing a large window to access bicontinuous microparticles. The key point is to simultaneously introduce contradictory attractive–repulsive interactions between poly(4-vinylpyridine)-containing BCPs and carboxylated perfluorinated additives. Hydrogen bonding between poly(4-vinylpyridine) and carboxyl groups, as an attractive interaction, directs the microphase separation between BCPs and additives. Meanwhile, the repulsive interaction due to the high immiscibility between perfluoroalkyl residues and BCPs induces macrophase separation. The compromise of attractive–repulsive interactions triggers the formation of bicontinuous microparticles in a large phase space. In addition, the vulnerable nature of hydrogen bonding provides a flexible route for reversibly shaping BCP assemblies. This work establishes a platform for fabricating structured BCP microparticles of which the structures are hardly accessible through traditional solution self-assembly.
研究领域:
高分子化学
·
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2023
·
IF 6
Ziyun Liu,Jianming Wang,Chen Yang,Zhuo Wang
Binary gels with various microstructures, including apricot kernel protein isolate-gellan gum gels with high freeze-thaw stability, were obtained by combining transglutaminase covalent cross-linking and gellan gum modification. Adding 0–0.1% gellan gum (w/w) can form continuous protein network structures dominated by covalent networks and disulfide bonds. In addition to covalent cross-linking, the increase in the strength of hydrophobic and electrostatic interactions at gellan gum concentrations below 0.2% (w/w) facilitated the formation of a bicontinuous network (AGG3). When excess gellan gum was added (0.03%, w/w), gellan gelation occurred in the system, leading to the formation of heterogeneous aggregated structures (AGG4). Confocal laser microscopy revealed a dense porous structure in the continuous protein network after freeze-thaw treatment, and AGG4 showed heterogeneous and loose aggregated microstructure, while the bicontinuous network structure was maintained. The water holding capacity of AGG3 was increased by 21.36% after freezing compared with the gels without gellan gum, and AGG3 maintained high hardness and springiness. Low-field nuclear magnetic resonance and magnetic resonance imaging showed that the bicontinuous network was more conducive to the tethering ability and uniform distribution of hydrogen protons than the continuous network structure of proteins. Therefore, AGG3 exhibited excellent freeze-thaw stability.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Tianyi Dai,Yankun Lin,Qing Yin,Qingmin Ji,Jingyi Wang,Hongbing Jia
Conductive hydrogel strain sensors demonstrate extensive potential in artificial robotics, human–computer interaction, and health monitoring, owing to their excellent flexibility and biocompatibility. Wearable strain sensors for real-time monitoring of human activities require hydrogels with self-adhesion, desirable sensitivity, and wide working range. However, balancing the high sensitivity and a wide working range remains a challenge. Herein, a marine coral exoskeleton inspired bicontinuous hydrogel (PAD-iP) for strain sensor was synthesized by in-situ copolymerization of acrylic acid (AA) and dimethylaminpropyl methacrylamide (DMAPMA) in the presence of poly(3, 4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) skeleton, using glycerol as water-retaining agent. Benefiting from the bicontinuous structure composed of electron-transported conductive, tough PEDOT:PSS skeleton and the ion-transported, flexible poly(AA -co -DMAPMA) hydrogel matrix, the strain sensor based on PAD-iP hydrogel struck an optimal balance between ultrahigh sensitivity (gauge factor up to 1049) and a broad sensing range (strain of 0–600 %). The strain sensors could be adhered directly to skin to monitor full-range human activities, physiological activities and physical vibrational signals of the local environment. The strain sensor also exhibited robustness and stable sensing properties across a wide temperature range (−20 ∼ 40 ℃). This work offers a fresh inspiration for preparation of high-performance hydrogel strain sensors.
研究领域:
材料科学
·
生物医学工程
✓ 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）