SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Juanjuan Feng,Yu Tian,Kunlin Li,Fei Wang,Kai Li,Ping Ning
Toxic H 2 S limits the high-value utilization of high-concentration CO in yellow phosphorus tail gas. High-performance adsorbents play a significant role in the purification of yellow phosphorus tail gas and the recovery of CO. In this study, manganese-based adsorbents doped with other metals (Cu, Co, Ni, Ce, and Fe) were synthesized and tested for H 2 S removal. The results demonstrate that doping α-MnO 2 with metals significantly enhances its desulfurization performance. Notably, the 20 % Ni/Mn adsorbent achieves the best performance, exhibiting an adsorption duration of approximately 50 h under test conditions and H 2 S capacity up to 854.35 mg/g. Mechanism studies show that the performance improvement is mainly attributed to the doping of Ni, which disrupts the growth of the α-MnO 2 rod-like structure, promoting the formation of fine particles and exposing more crystal interfaces. This is conducive to the migration and release of active lattice oxygen species on the adsorbent, thereby enhancing the adsorption-oxidation performance of the adsorbent for H 2 S. Moreover, Ni significantly promotes the formation of high-valent Mn, enhancing the adsorbent’s oxidation capability and facilitating the decomposition of H 2 S. This study proposes an innovative synthetic strategy for constructing adsorbents with high H 2 S adsorption performance under anaerobic and dry conditions.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2025
·
IF 4.7
Weiwei Du,Xiaocheng Huang,Yihang Ma,Yuanhao Shen,Xinyi Zhang,Jing He,Zheng Yang,Yingwu Luo,Junjie Zhao
Emulsion polymerization is widely implemented for producing sustainable waterborne polymer dispersions for diverse applications such as paints, adhesives, and synthetic rubbers. However, fouling during emulsion polymerization reduces heat transfer, increases reactor downtime, and severely affects product quality. While previous studies have focused on suppressing fouling by inhibiting the polymerization reactions on reactor surfaces, strategies for mitigating foulant adhesion have not yet been explored. In fact, foulant adhesion is known as one of the primary mechanisms for fouling in emulsion polymerization. To address this issue, we developed a series of durable ultrathin copolymer coatings via initiated chemical vapor deposition and investigated the relationship between the surface properties and the adhesion to latex foulant. We found a transition between two adhesion mechanisms that determines the design strategies for antifouling coatings: in the dry adhesion regime, reducing surface polarity decreases the adhesion; in the hydration repulsion regime, hydrophilicity is key to minimize foulant adhesion. Our copolymer coatings exhibit up to 270% smaller work of adhesion than Fe and 71.8% lower surface foulant density than stainless steel in simulated fouling assessments, showing promising performance for fouling control in emulsion polymerization.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Surfaces and Interfaces
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2025
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IF 6.3
Liwei Ding,Han Lu,Zijie Luo,Guobao He,Mingliang Jin,Xin Wang,Guofu Zhou,Lingling Shui,Eser Metin Akinoglu
Vertically aligned multi-walled carbon nanotubes (VA-MWCNTs) display a structural transformation when transitioning from dry to wet states, often collapsing into angled conical structures. This study probes whether such a transition arises inherently from liquid immersion or because of the drying process. Utilizing Surface Enhanced Raman Spectroscopy (SERS) with gold caps on VA-MWCNTs tips, deposited through a modified Glancing Angle Deposition (GLAD) technique, and Rhodamine 6 G as a molecular probe, we analyze the alignment dynamics of VA-MWCNTs between their wet and dry states. Comparative SERS data from freshly immersed and previously wetted-dried VA-MWCNTs revealed superior Raman enhancement in the angled conical structures. Hence, we conclude that the nanotubes largely retain their vertical stance in liquid environments but undergo an irreversible deformation during the drying process due to (partial) MWCNT severance from the substrate base. This insight is pivotal for applications sensitive to VA-MWCNTs' wet-dry transitions.
研究领域:
材料科学
·
光谱学
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产品关联
DOI
高影响因子
CURRENT PHARMACEUTICAL BIOTECHNOLOGY
·
2020
·Vol. 21
·期 8
·741-747
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IF 2.097
Zhang Liguang,Shen Yanan,Lu Wenjing,Guo Lengqiu,Xiang Min,Zhang Dayong
Background: Although the stability of proteins is of significance to maintain protein function for therapeutical applications, this remains a challenge. Herein, a general method of preserving protein stability and function was developed using gelatin films. Methods: Enzymes immobilized
onto films composed of gelatin and Ethylene Glycol (EG) were developed to study their ability to stabilize proteins. As a model functional protein, β-glucosidase was selected. The tensile properties, microstructure, and crystallization behavior of the gelatin films were assessed.
Results: Our results indicated that film configurations can preserve the activity of β-glucosidase under rigorous conditions (75% relative humidity and 37°C for 47 days). In both control films and films containing 1.8 % β-glucosidase, tensile strength increased with increased
EG content, whilst the elongation at break increased initially, then decreased over time. The presence of β-glucosidase had a negligible influence on tensile strength and elongation at break. Scanning electron-microscopy (SEM) revealed that with increasing EG content or decreasing enzyme
concentrations, a denser microstructure was observed. Conclusion: In conclusion, the dry film is a promising candidate to maintain protein stabilization and handling. The configuration is convenient and cheap, and thus applicable to protein storage and transportation processes in the
future.
研究领域:
生物化学
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材料科学
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酶工程
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Meng-Han Miao,Jin-Kai Qiu,Zhen-Liang Xu,Cheng Lian,Hong-Lai Liu,Jia-Hui Li,Yong-Jian Tang
This study investigated the chemical stability differences between dry and wet nanofiltration membranes when immersed in strong acid and base environments. Systematic experimental studies were conducted on both types of nanofiltration (NF) membranes, supplemented by Molecular Dynamics (MD) simulations and Density Functional Theory (DFT) calculations. The results indicate that wet NF membranes, soaked in deionized water for a week, exhibit higher chemical stability compared to dry membranes treated only with air. Traditional air heating causes membrane pore contraction and excessive crosslinking. However, after a week of immersion in water, the polyamide (PA) layer gradually becomes a loose and well-extendable PA layer. MD simulations revealed that H + and OH − ions possess lower diffusion coefficients and extended residence times in dry NF membranes, making them more prone to damage. Additionally, DFT calculations disclosed that the Gibbs free energy (ΔG) for amide bond hydrolysis in wet NF membranes, in the presence of water molecules, is elevated, significantly delaying their hydrolysis rate under extreme conditions. This study highlights the pivotal role of membrane wetness in the chemical durability of NF membranes and offers a novel perspective for improving membrane lifespan and efficiency.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Small Science
·
2023
·Vol. 3
·期 7
·2300044
·
IF 12.7
Huan Yu,Runlin Zhang,Yong-Guang Jia,Yunhua Chen,Xuetao Shi
Endowing adhesives with both dry and wet adhesion to surfaces from hard substrates to soft biological tissues is challenging. Herein, a branched supramolecular polymer is introduced in dry- and wet-crosslinking forms to adaptively achieve dry and wet interfacial adhesion. The branched supramolecular polymer (PAMU) with multiple pendant functional moieties is prepared by one-pot reversible addition-fragmentation chain transfer polymerization. The PAMU polymer solution can firmly adhere to glass sheets after the water evaporates. The aqueous solution of PAMU polymer with residual double bonds can be further polymerized to form a wet crosslinking network. The hydrogen bonding moieties endow the supramolecular network with self-healing properties, while the in situ polymerization of the PAMU polymer leads to stable adhesion to wet tissues. This study provides a promising approach to develop supramolecular adhesives for versatile adhesion applications.
研究领域:
材料科学
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化学工程
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高分子科学
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生物医学工程
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Fengxiang Cao,Changjiang Sun,Yecheng Xu,Jianzhang Li,Zhen Fang,Zhuhui Qiao
Soybean protein isolate (SPI), a promising biomass resource to substitute petroleum-based chemicals, has been widely employed to prepare biobased board adhesives due to abundant availability, environmental compatibility, and rich functionality. However, pure SPI-based adhesives exhibit poor mechanical properties and high water absorption, which limit their practical application. In this work, dopamine-functionalized hexagonal boron nitride (PDA-BN) and carboxymethylated lignin (CAL) were introduced to serve as fillers and reinforcers to cross-link with SPI. The wet and dry shear strength of resultant adhesive increased by 172% and 64.3% to 1.58 MPa and 2.07 MPa, respectively, compared to the pure SPI-based adhesive, surpassing the performance of a vast of different SPI-based adhesives. The SPI-based adhesive also demonstrated enhanced water resistance, flame retardancy, and mildew resistance. These improvements can be attributed to the dense covalent and noncovalent intermolecular interactions and improved compatibility between PDA-BN and the SPI matrix.
研究领域:
材料科学
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化学工程
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生物技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhengyuan Li,Yizhe Liu,Xiaowei Pei,Yang Wu,Feng Zhou
Polymer brushes surface, one of the most researched bionic aqueous lubrication materials, has ultralow friction coefficient underwater but suffer from high friction in air which leads to the worse wear resistance in dry condition. In this work, dry/wet adaptive polymer brushes coating was fabricated by grafting hydrophilic poly 3-sulfopropyl methacrylate potassium salt (pSPMA) and hydrophobic polydimethylsiloxane (PDMS) brushes simultaneously on an inorganic silica sol layer via surface-initiated atom transfer radical polymerization (SI-ATRP) and click chemistry. The hybrid coating achieves self-lubrication in the air and superlubricity underwater through the preferential assembly and high hydration of hydrophobic and hydrophilic components in different ambiance. More importantly, it maintains high transparency, antifouling, antifogging properties, and exceptional wear resistance that can withstands 1200 abrasion cycles at 5 N load without significant wear. These features make the coating highly promising for practical applications in optical devices, touchscreens, underwater systems, and other environments requiring reliable lubrication across both wet and dry conditions. This strategy overcomes the limitations of conventional polymer brushes, enabling robust lubrication across wet/dry conditions and accelerating practical applications.
研究领域:
材料科学
·
表面工程
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摩擦学
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聚合物化学
·
仿生材料
✓ 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）