JOURNAL OF POLYMER RESEARCH
·
2021
·Vol. 29
·期 1
·1-8
·
IF 3.097
Li Liying,Feng Jianhua,Shao Ningning,Shen Chen
A amphiphilic and biodegradable block copolymer is obtained by introducing hydrophilic polyethylene glycol segments into the segments of polyamino acids through copolymerization. And the block copolymers, poly(L-phenylalanine)-b-poly(ethylene glycol), are used to fabricate silica materials through Evaporation-Induced Self-Assembly method. In the synthesis procedure, anilino-methyl triethoxy silane is used as an intermedium, on the one hand it interacts with polypeptide-based copolymer through π-π interaction between the phenyl groups of phenylalanine segments and anilino-methyl triethoxy silane; on the other hand, anilino-methyl triethoxy silane can co-condense with tetraethoxylsilane through hydrolysis process. The prepared silica possesses supermicropores and it is proposed that the supermicropores are templated by the polypeptide segments. It is proved that both polypeptide-based block copolymer and anilino-methyl triethoxy silane play important roles in the formation of mesoscale short-range-order and hierarchical structure. When the phenylalanine segment of block copolymer is longer, it can induce a well-defined shuttle-like morphology of polymer/silica hybrid particles.
研究领域:
材料科学
·
生物化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Junyan Fu,Chang Chen,Richard Lee Smith Jr.,Xinhua Qi
Humins, which are intractable carbon byproducts formed during thermochemical conversion of carbohydrates, are considered to be undesirable because of their adverse effects on product yields, catalyst activity, stability, and recycling. Herein, we show that the alcohol-soluble fraction of humins can be used to directly synthesize ordered mesoporous carbons (OMCs) by the classical solvent evaporation-induced self-assembly (EISA) method without the use of aldehydes or metal ion cross-linkers. The key mechanistic feature of the self-assembly of alcohol (ethanol)-soluble humins is that ulmic acid-containing humins act to cross-link micelles according to condensation reactions occurring in humins formation. The prepared OMCs show well-defined two-dimensional (2D) hexagonal mesoporous structures having uniform pore sizes (3.5 to 4.8 nm), high surface areas (∼600 m2 g–1), and pore volumes (∼0.4 cm3 g–1). Using dyes as model pollutants, selective adsorption of OMCs for macromolecular organic pollutants was confirmed, thus the resulting OMC materials appear to have many technological applications. The method proposed for humins conversion to ordered materials may serve as a simple and green way to utilize undesirable and commonly generated humins in carbohydrate conversions, which should improve the sustainability of carbohydrate transformation schemes and broaden the scope of biomass-based or natural humic acid precursors.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Qian Xu,Wentao Yan,Wei Li,Yue Yuan,Kaiyuan Liu,Zibing Pan,Qianqian Guo,Long Jiao,Yanjun Hu
Supraparticles, the small aggregation entities of functional micro/nanoparticles, are crucial in materials science, chemistry, and nanotechnology owing to their unique properties and wide range of applications. Evaporation-driven self-assembly of colloidal droplets on surfaces has proven effective for supraparticle synthesis. However, challenges such as low production rates, adhesion risks, cross-contamination, and limited flexibility continue to hinder the widespread adoption of this method. To address these challenges, this study proposes an innovative strategy that uses the novel lotus-seed head and Nepenthes-inspired trap-array slippery surfaces (TASS). These surfaces feature a macroscopic trap array and a lubricant layer for high-throughput supraparticle synthesis. The lubricant traps provide a self-locating and stable lubrication effect, enabling the retreatment of addressable droplet array contact lines during evaporation, leading to the successful fabrication and collection of the supraparticle array. Additionally, the method demonstrates high synthesis flexibility, allowing for the creation of various supraparticle structures, morphologies, and porosities. As a proof of concept, core–shell magnet-actuated photocatalytic supraparticles were synthesized using TASS and showed enhanced contaminant degradation efficiency. This novel surface-template strategy provides a promising approach for large-scale, evaporation-driven supraparticle synthesis, with potential applications in catalysis, energy storage, and carbon capture.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2018
·Vol. 94
·期 3
·879-891
·
IF 2.587
Feihu Li,Jingjing Fu,Jie Jin,Silan Wang,Yangyang Liu,Meng Yang,Xiaoru Fu
BACKGROUND Simultaneous removal of arsenic and fluoride anions from water by adsorption remains a challenge for environmental remediation practice. To address this issue, four mesoporous bimetallic oxides (MBOs) were prepared via the evaporation-induced self-assembly (EISA) method and studied as adsorbents for the co-uptake of arsenate (As(V)) and fluoride (F − ) from synthetic wastewater. Adsorption envelope and equilibrium experiments were performed to investigate the adsorption behaviors and properties. RESULTS These composites possessed high surface areas (e.g. 200 m 2 g −1 for meso-Ti/Al) and well-defined mesopores, enabling high adsorption capacities for both As(V) and F − . The maximum adsorption capacities of mesoporous titanium-lanthanum oxide (meso-Ti/La) were as high as 81.42 mg g −1 and 44.37 mg g −1 for As(V) and F − , respectively. Surface complexation modeling indicates that As(V) removal mainly involved bidentate surface complexation with surface ≡Me-OH, while F − was retained by formation of monodentate surface complexes. CONCLUSION The removal mechanisms were confirmed by X-ray photoelectron spectroscopy. These MBOs were found to be effective for simultaneous removal of arsenic and fluoride from water. This study also demonstrated that the incorporation of multi-components and mesoporosity into one composite is an efficient strategy for design and application of high-efficiency adsorbents for environmental remediation of aqueous contaminants. © 2018 Society of Chemical Industry
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2019
·Vol. 6
·期 11
·1900002
·
IF 4.713
Yuliang Wang,Binglin Zeng,Xiaolai Li,Xuehua Zhang
Microdents fabricated on solid substrates have numerous applications, such as containers for cell growth, reactors for chemical reactions, and nucleation sites for growing photonic crystals. In this study, a new method is developed to fabricate microdents on polystyrene (PS) film deposited on a solid surface. The process relied on Ouzo effect in a ternary solution consisting of three solvents exhibiting different volatilities. In the ternary solution, precursor water droplets are first nucleated when a good solvent of water evaporated. The nucleated water droplets then act as templates for microdent formation during PS film deposition. After water droplets eventually evaporates, microdents are generated on the PS film. The detailed process of microdent formation is experimentally revealed. By controlling the nucleation of water droplets and PS concentration, the lateral size and the depth of microdents are systematically tuned. Moreover, it is demonstrated that the microdent decorated films obtained with the proposed method can be used to fabricate lubricating surfaces, which exhibit a low contact angle hysteresis of 2°.
研究领域:
材料科学
·
表面工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Guoxing Liao,Lei Chen,Yunjie Zhang,Oleksandr O. Mykhaylyk,Paul D. Topham,Daniel T.W. Toolan,Matthew J. Derry,Jonathan R. Howse,Qianqian Yu,Guiju Feng,LinGe Wang
Block copolymer-based nanoproducts including particles, fibers and films show promise in high-end applications including nanotemplating, nanolithography , and nanoporous membranes due to their advantageous self-assembled structure. However, few studies probe the nanofabrication process in detail and monitor the concomitant self-assembled structural transitions. Herein, time-resolved small-angle X-ray scattering (SAXS) is exploited to follow such nanostructural changes. Evaporation-induced casting, electrospraying or electrospinning, followed by a final solvent vapor annealing step, have been used to create a series of nanoproducts with reversibly tunable morphologies from a model block copolymer, polystyrene- b -poly(ethylene- co -butylene)- b -polystyrene (SEBS). During evaporation-induced casting, which is considered as an unconfined system, a selective (co)solvent system composed of tetrahydrofuran (THF) and dimethylformamide (DMF) can lead to the formation of various SEBS structures. For DMF-based unconfined systems, the final SEBS lamellar structures were found to be different from the structure formed from THF only, demonstrating the critical role of solvent selection in evaporation-induced casting. The comparison of SEBS electrospun fibers reveals the unique and complex self-assembled structural transition occurring in a confined system. Time-resolved SAXS studies of our model triblock copolymer provide guidelines for a more general approach to access various nanostructures from self-assembling block copolymers.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 7
·3680-3686
·
IF 2.936
Zhongsheng Wu,Yinyin Lin,Juanjuan Xing,Mengying Zhang,Jinbo Wu
Metal–organic frameworks (MOFs), produced by metal ions coordinated to organic linkers, have attracted increasing attention in recent years. For the utilization in MOFs in numerous applications, achieving positioned MOF growth on surfaces is essential to fabricate multiple-functional devices. We develop a novel miniaturized method to realize surface-tension-confined assembly of HKUST-1 in femtoliter droplet arrays. HKUST-1 crystal arrays grown by evaporation-induced crystallization are observed, and five typical crystal morphologies (i.e., hexagonal, irregular hexagonal, triangular, arc-like and ribbon-like crystals) are found in the large area on the patterned substrate during crystallization. Our research provides a better understanding of the formation mechanism of MOF crystals in confined sessile droplets. The key factors determining HKUST-1 single-crystal growth are the internal flows in an evaporating droplet and consequently aggregation induced by the combination of metallic Cu(II) and BTC ions. Understanding the formation of different morphologies of HKUST-1 crystals is useful to guide the production of crystals with desired shapes for various applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Yinghui Hu,Yulin Yang,Kaifeng Lin,Dongyu Hao,Lele Qiu,Dakang Wang,Ruiqing Fan,Debin Xia
In this study, various nanothermites, such as nCuO/nano Al (nAl), nMoO 3 /nAl, nBi 2 O 3 /nAl, nFe 2 O 3 /nAl, nNiO/nAl and nMgO/nAl, were encapsulated into ammonium perchlorate (AP) by the evaporation induced self-assembly (EISA) method. The obtained composites showed superior properties in decreasing the decomposition temperature of AP, increasing heat of release and ignition and combustion properties than the corresponding physically-mixed ones. The mechanism for such high-quality composites prepared by EISA was due to not only more intimate interaction between AP and nanothermites but also less agglomeration of nanothermites. nAl/nCuO/AP showed the lowest decomposition temperature of AP, highest heat of release and best ignition and combustion properties among all the obtained composites by EISA. This was because of effective conversion of NH 3 to N 2 O with less NO production, as proved by the real-time FT-IR. This work demonstrated that EISA was an effective approach with high compatibility for obtaining various AP-nanothermites-based energetic materials.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Fushuai Wang,Quanzi Yuan
Hypothesis The rich variety of patterns induced by evaporating drops containing particles has significant guidance for coating processes , inkjet printing, and nanosemiconductors. However, most existing works construct a uniform pattern by suppressing the coffee ring effect, and establishing the connection between them is still an academic challenge. Experiments We report uniform, polygonal, and coffee ring patterns obtained by adjusting the solute concentration that sets in when an ethanol drop with dissolved ibuprofen is deposited on a silicon wafer. Findings Pattern formation involves rich hydrodynamic events: spreading, evaporative instability, dewetting, film formation, and particle deposition. Based on the distinct multiscale properties, this series of patterns is directly connected from the perspective of fractal geometry, which allows us to name them “fractal deposition patterns”. A theoretical model considering film stability is established to explain the mechanism behind pattern formation, which is well verified by experiments. This work has presented a unique strategy that can directly connect uniform, polygonal, and coffee ring patterns under the same physics , hoping to provide instructive guidance for practical applications.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Yuan Renxuan,Li Huizeng,Zhao Zhipeng,Li An,Xue Luanluan,Li Kaixuan,Deng Xiao,Yu Xinye,Li Rujun,Liu Quan,Song Yanlin
Numerous efforts have been devoted to harvesting sustainable energy from environment. Among the promising renewable resources, ambient heat exhibits attractive prospects due to its ubiquity and inexhaustibility, and has been converted into electricity through water evaporation-induced hydrovoltaic approaches. However, current hydrovoltaic approaches function only in low-humidity environments and continuously consume water. Herein, we fabricate a hermetic hydrovoltaic cell (HHC) to harvest ambient heat, and have fully addressed the limitations posed by environmental conditions. Meanwhile, for the first time we develop an internal circulation hydrovoltaic mechanism. Taking advantage of the heterogeneous wicking bilayer structure, we verify that inside the hermetic cell, the ambient temperature fluctuation-induced evaporation and further the water circulation can persist, which sustains the hydrovoltaic effect to convert ambient heat into electricity. More importantly, the hermetic design enables the cell to work continuously and reliably for 160 h with negligible water consumption, unaffected by external influences such as wind and light, making it an excellent candidate for extreme situations such as water-scarce deserts, highly humid tropical rain forests, rainy days, and dark underground engineering. These findings provide an easily accessible and widely applicable route for stably harnessing renewable energy, and more notably, offer a novel paradigm toward leveraging low-grade ambient heat energy via circulation design.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2019
·Vol. 10
·期 1
·1-9
·
IF 11.878
Li Xiankai,Li Mingjie,Xu Jie,You Jun,Yang Zhiqin,Li Chaoxu
Liquid metal (LM) droplets show the superiority in coalescing into integral liquid conductors applicable in flexible and deformable electronics. However, the large surface tension, oxide shells and poor compatibility with most other materials may prevent spontaneous coalescence of LM droplets and/or hybridisation into composites, unless external interventions (e.g., shear and laser) are applied. Here, we show that biological nanofibrils (NFs; including cellulose, silk fibroin and amyloid) enable evaporation-induced sintering of LM droplets under ambient conditions into conductive coating on diverse substrates and free-standing films. The resultants possess an insulating NFs-rich layer and a conductive LM-rich layer, offering flexibility, high reflectivity, stretchable conductivity, electromagnetic shielding, degradability and rapid actuating behaviours. Thus this sintering approach not only extends fundamental knowledge about sintering LM droplets, but also starts a new scenario of producing flexible coating and free-standing composites with flexibility, conductivity, sustainability and degradability, and applicable in microcircuits, wearable electronics and soft robotics.
研究领域:
材料科学
·
生物工程
·
柔性电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 26
·18832-18837
·
IF 3.9
Yahua Liu,Bingzhong Xiao,Quanmao Wei,Zichao Yuan,Wenzhuo Song,Ling Zhou,Wenna Ge
Water evaporation-induced electricity generators are considered a promising green energy-harvesting technology to alleviate the increasingly serious fossil energy crisis. Previous water evaporation-induced electricity generators mainly focused on single component carbon black, limiting the improvements in energy output. At present, there are relatively few studies on multi-component carbon black for improving electricity-generation performance. Herein, inspired by plant transpiration, we designed a fabric-based water evaporation-induced electricity generator (FWEG) based on multi-component carbon black, which can maintain a voltage of 0.65 V for more than 48 h. Through the synergistic effect of multi-component carbon black-enhanced oxygen-containing functional density, the FWEG can generate an enhanced output current of 61.61 μA without any additional energy input. Moreover, we show that the FWEG can be integrated readily to charge commercial capacitors or directly power LED lights and calculators for a long time. This work provides new insights for designing high-performance hydrovoltaic electricity generators for sustainable green energy harvesting.
研究领域:
材料科学
·
能源技术
✓ 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）