SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Zhuo Tan,Baoling Chu,Chenguang Wang,Jing Tian,Yi Nie,Hongshuai Gao
Efficient recovery and high-value utilization of keratin from waste human hair are of significant interest for sustainable materials development. However, the densely cross-linked disulfide bonds and extensive hydrogen-bond network of keratin make its mild and efficient extraction challenging. In this work, a redox-active deep eutectic solvent (DES) composed of L-cysteine (L-Cys) and monoethanolamine (MEA) was developed for keratin recovery from waste human hair. Under optimized conditions of 80 °C, 3.5 h, and 10 wt% solid loading, the keratin recovery yield reached 96.5%, and the solvent maintained stable performance over five recycling cycles. Experimental results, together with DFT and MD simulations, indicate that the dissolution process is driven by synergistic disulfide bond cleavage and disruption of the hydrogen-bond network, while the protein backbone remains largely intact. The recovered keratin was further phosphorylated and co-regenerated with cellulose to fabricate a phosphorylated keratin/cellulose composite membrane (P-KCM). The membrane exhibited efficient and selective Fe 3+ adsorption, with a maximum adsorption capacity of 297.8 mg·g −1 . FT-IR and XPS analyses reveal that phosphate groups serve as the primary coordination sites for Fe 3+ . In tests with real LiFePO₄ leachate, P-KCM removed 97.3% of Fe 3+ while leaving 80.1% of Li + in solution, and it retained 84.7% of its initial adsorption capacity after four adsorption-desorption cycles. This work provides a mild, efficient, and recyclable strategy for keratin valorization and offers a feasible approach for selective metal ion separation and pre-treatment in battery recycling.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Ya-Qiao Tian,Ming-Chuan Zhou,Xiao Sheng,Xiao-Feng Zheng,Wei Xu,Le Sang,Zhi-Ping Zhao
In this work, three types of tubular membrane were prepared and characterized: hydrophilic, Janus, and hydrophobic. In the MDEA/water-N 2 system, the hydrophilic membrane tube generates the smallest bubble size (161–256 μm) with narrow distribution and hydrophobic membrane tube produces the largest bubble size (3378–4357 μm) with a broader distribution, while the Janus membrane tube yields bubbles with an average size ranging from 668 to 927 μm. For the ethanol-N 2 system, the differences in bubble size among the different membrane tubes are less pronounced. The hydrophilic, hydrophobic, and Janus membrane tube produces bubbles size of 300–477 μm, 376–633 μm, and 413–697 μm, respectively. The bubble size distribution for three types of membrane tube follows a Rosin-Rammler (R-R) distribution. A gas holdup of 4–35.3% and gas–liquid interfacial area of 91–8859 m 2 /m 3 can be obtained for three types of membrane tubes. Based on 0.2 mol/L MDEA-CO 2 mass transfer system, Janus membrane shows the superior mass transfer coefficient performance due to the appropriate bubble size and narrow bubble size distribution. Predictive models for average bubble size, gas holdup, and gas–liquid mass transfer coefficient of three types of membrane tube were developed, showing good agreement with measured values.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jin Cai,Wan Chen,Hai Li,Xin Zheng,Han Tang,Ming-Ke Yang,Zi-Xuan Huang,Zi-Ying Zhao,Peng Xiao,Yun-Lei Peng,Xian-Ren Zhang,Long-Long Xie,Bei Liu,Chang-Yu Sun,Guang-Jin Chen
Capturing CO 2 at scales have drawn increasing attention to addressing climate change and meeting global carbon targets. However, current CO 2 capture strategies face critical tradeoffs in terms of selectivity, regeneration energy, and cost-effectiveness. Here, we present a net-like colloid that is formed by the self-assembly of simple molecules, e.g., some organic ligands of metal–organic frameworks, in water. They have reticular characteristics under cryo-scanning electron microscopy and in particular, form a skeleton/micro-pool structure. We demonstrate the thermal response of the reticular structure, which declines with elevated temperatures, brings the colloidal peculiar CO 2 absorption-desorption behaviors. Specifically, they absorb CO 2 with high capacity at lower temperatures and release high-pressure gases with thermal input at higher temperatures (with over half of regeneration efficiency under 80 °C and 5 bar), enabling a high gas capacity but a low regeneration penalty. The construction of net-like structure has achieved excellent separation performance over gases, including CH 4 and N 2 (with a maximum selectivity of 1539 and 7609, respectively). Further, our finding to create a novel thermal-responsive colloid is scalable and feasible in large-scale applications, and can expand the field of colloid science significantly.
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高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Mengyuan Qi,Bing Gao,Changhai Xu,Jinmei Du,Jiaqi Liu,Hongying Yang
Basalt fiber (BF), as a high-performance inorganic fiber, exhibits excellent overall properties, including high strength, high modulus, corrosion resistance, and flame retardancy. However, its dense structure, smooth surface, and chemical inertness lead to monotonous coloration and difficulty in dyeing. In this study, cationic waterborne polyurethane (WPU) was employed as a modifier for pretreating BF fabrics and underwent protonation to create positive charges under acidic conditions, enabling dyeability with acid dyes. Three types of WPU films (MWPU, DWPU, and TWPU) were created by grafting cationic chain extenders N-methyldiethanolamine (MDEA), 3-Dimethylaminopropane-1,2-diol (DMAD), and N-t-Butyldiethanolamine (TBDEA) onto the polyurethane chains, with all light transmittances exceeding 90% and ζ potential over 50 mV to ensure robust bonding with anionic dyes. The tensile strength of fabrics modified with WPU increased by more than 71%, and their strain also improved significantly. MWPU served as the best modifier for coloring, with the 10%MDEA dosage formulation reaching a K/S value of 12, and the dye uptake rate showing 81.1%. It also exhibited excellent fastness, with sunlight fastness at grade 5, minimum rubbing fastness at grade 3∼4, and washing fastness at 4 or higher. We employed a straightforward structure to impart color to BF fabrics, achieving outstanding color fastness and offering an effective approach to advancing the application of colored inorganic textiles.
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高影响因子
Journal of CO2 Utilization
·
2026
·
IF 8.6
Debiao Pan,Caijin Zhou,Xiaoda Wang,Xuehui Ge
Achieved efficient CO 2 absorption in curved TiTR under counter-current flow. • Overall volumetric mass transfer coefficient up to 0.97 s −1 . • Enhancement factor of gas-liquid mass transfer reached 1.35. • Trade-off between mass transfer enhancement and energy consumption evaluated. • Empirical correlation for mass transfer coefficient with 15% error. In recent years, the substantial emission of carbon dioxide (CO 2 ) has caused increasingly severe environmental issues. In response, policies related to carbon neutrality and carbon emission reduction have been rolled out. To achieve these goals, the efficient capture of CO 2 is essential. This work systematically elucidated the gas-liquid two-phase counter-current mass transfer mechanism for an efficient CO 2 absorption process using a curved tube-in-tube reactor (TiTR), which has a wide gas-liquid contact area and a new reactor structure. The variation of CO 2 absorption efficiency and the overall gas-liquid volumetric mass transfer coefficient ( k L a ) under different experimental conditions, including curvature diameter, pitch, and liquid flow rate, was systematically examined. Through the optimization of experimental conditions, the enhancement factor of k L a , which was defined as the ratio of k L a of the curved TiTR to that of the straight TiTR, reached 1.35, and k L a was up to 0.97 s −1 . In addition, the trade-off between mass transfer enhancement and energy consumption in the CO 2 absorption enhancement process within TiTRs with different geometries was evaluated. Finally, on the basis of the experimental data, an empirical equation correlating k L a with experimental parameters was further proposed. This equation can be used to predict the gas-liquid mass transfer in TiTRs.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Zheng Jian,Dehong Gong,Langbo Bai,Wei Zheng,Shihai Zhang,Yuzhong Chen,Xi Zeng,Qihui Song,Guo Yu
The integrated absorption-mineralization (IAM) technology enables mild regeneration of the absorbent and permanent CO 2 storage in CO 2 capture systems. However, developing green and efficient absorbents remains the core challenge for this technology. In this study, potassium lysinate (LysK) was used as the main amine, and systematic investigations were carried out, including optimal formulation screening, mineralization process optimization, reaction mechanism analysis, and cyclic stability evaluation. The results showed that 2-amino-2-methyl-1-propanol (AMP) was the optimal auxiliary amine. The blended amine composed of 1.6 mol/L LysK and 0.4 mol/L AMP achieved a mineralization rate 15.28 percentage points higher than that of pure LysK, while maintaining a high CO 2 absorption capacity of 1.17 mol CO 2 /mol absorbent. Under optimal mineralization conditions, the mineralization rate reached 99.56%, approaching the theoretical maximum. The Ca 2+ /CO 2 molar ratio and stirring speed only regulated the mineralization kinetics without altering the final thermodynamic equilibrium state. The mineralization priority of different CO 2 species in the system followed: free HCO 3 − /CO 3 2− > ε-carbamate > α-carbamate. The mineralization product was predominantly high-purity calcite calcium carbonate, which meets the requirements for permanent storage. After ten absorption-mineralization cycles, the mineralization capacity and pH of the system remained stable, with no obvious performance degradation. The physical entrainment loss of the absorbent was quantitatively determined to be approximately 0.155 mmol/g CaCO 3 per cycle. A preliminary economic assessment shows that after deducting the direct operating costs, the co-production of precipitated calcium carbonate yields a gross profit of approximately 677.4 USD/t CO 2 (4567.2 CNY/t CO₂), indicating that the system possesses value-adding potential. The LysK-AMP blended amine system developed in this study combines high capture efficiency, low regeneration energy consumption, and excellent cyclic stability, providing a theoretical basis and experimental verification for the industrial application of IAM technology.
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高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Yan Huang,Tao Song,Zhiyuan Dong,Lehang Liang,Weixin Kong,Xinling Zhong,Tao Wang,Mengxiang Fang,Wei Li,Sujing Li
In order to address the limitations of traditional organic amine absorbent, such as the limited CO2 absorption loading, difficulties in CO2 product regeneration, and high regeneration energy consumption during regeneration, a mixed amine absorbent consisting of 7.5 wt % 1,5-diamino-2-methylpentane (DA2MP) + 7.5 wt % N-aminoethylpiperazin (AEP) + 15 wt % N-methyldiethanolamine (MDEA) (D-A-M) has been developed. This formulation employed linear amine DA2MP as the primary absorbent, while cyclic amine AEP and tertiary amine MDEA served as the auxiliary absorbents. The development was achieved through a rigorous screening process. The D-A-M absorbent demonstrated a CO2 absorption capacity of 0.78 mol CO2·mol–1 and a regeneration efficiency of 80.38%. Additionally, it exhibited excellent cycling stabilities over five absorption–desorption cycles with the regeneration efficiency consistently exceeding 70%. The reaction mechanism between the absorbent and CO2, as revealed by 13C NMR analysis, involves the sequential reaction of primary, secondary, and tertiary amine groups. Electrochemical corrosion tests indicated that the CO2-saturated D-A-M absorbent showed significantly reduced corrosivity compared to the saturated 30 wt % MEA absorbent. In the pilot-scale experiment, the D-A-M absorbent achieved a CO2 capture rate of 97.5% and corrected regeneration energy consumption of 3.27 GJ·ton CO2–1, highlighting its considerable potential for industrial application.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Qi Liu,Yihan Yin,Hongxia Gao,Lianbo Liu,Shisen Xu,Teerawat Sema,Min Xiao,Zhiwu Liang
Amine degradation is one of the key issues that hampers the implementation of large-scale carbon capture technology. Degradation inhibitors can extend the lifetime of amine solutions, thereby lowering the operating cost of CO 2 capture system in the long term. In this work, different inhibitors including chelating agents, scavengers, and their blends were studied to inhibit the oxidative degradation of 1-amino-2-propanol (1AP). Amine loss, alkalinity loss, NH 3 emissions and heat-stable salt production were measured to evaluate the inhibitory effect. The parameter, namely inhibition factor, was proposed to quantify the effect of inhibitors. Two chelating agents were found to show good inhibitory effects on 1AP degradation, with inhibition factors of 7.1 and 4.3, respectively. In addition, the inhibition factor was increased to 9.4 by blending the inhibitors. A significant reduction in the inhibitor dosage was applied to achieve a similar inhibiting effect due to the excellent synergistic effects between the blended inhibitors.
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高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2026
·
IF 3.6
Jiawei Pan,Jie Cheng,Caili Yu,Xiang Xu,Faai Zhang
To improve the mechanical properties, eco-friendliness, and anti-corrosion properties of waterborne polyurethane (WPU) coatings, a nano-ZnO-modified rosin-based waterborne polyurethane (ZnRWPU) was synthesized via a prepolymerization method. The synthesis involved reacting silane coupling agent KH550-modified nano-ZnO (KH550@ZnO) with rosin-based acrylate glycol diol and isophorone diisocyanate (IPDI). The structure of the polyurethane was characterized by fourier transform infrared (FT-IR) spectra and X-ray powder diffractometer (XRD), ultraviolet spectra (UV–vis) for UV absorption capacity, thermogravimetry (TG) for thermal stability, water contact angle and water absorption for water resistance, and electrochemistry for corrosion resistance of the coating. The results showed that nano-ZnO could effectively improve the hydrophobicity, thermal stability, and UV protection of ZnRWPU, and the corrosion resistance of ZnRWPU in acid alkali and salt corrosion solutions were all increased compared with the RWPU without nano-ZnO. The optimal corrosion resistance was observed when the amount of nano-ZnO was 0.6 wt%. The successful integration of rosin with nano-ZnO modification offers a viable strategy for designing a new generation of high-performance, bio-based WPU coatings. Highlights Enhanced hydrophobicity and water resistance of the coating. Improved UV-blocking capability and thermal stability. Superior corrosion resistance in acidic, alkaline, and saline environments. Optimum overall performance achieved at 0.6 wt% nano-ZnO loading.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Xiaobin Zhou,Ting Zou,Yunqiong Tang,Shengpeng Mo,Yinming Fan,Bihong Lv,Yanan Zhang,Dunqiu Wang,Yinian Zhu,Zongqiang Zhu,Guohua Jing
Despite the advantages of low regeneration energy and corrosiveness, the CO 2 absorption loading capacity and regenerability of non-aqueous absorbents (NAAs) must be advanced to enable their viable practical application. This study introduced an innovative dual-activator strategy employing a tertiary amine and an alcohol to enhance both absorption and regeneration performance in primary amine–based NAAs. Experimental results showed that incorporating an appropriate amount of the tertiary amine N,N -dimethylethanolamine (DMEA) increased the CO 2 loading of the diamine 3-methylaminopropylamine (MAPA) to 1.54 mol·mol −1 MAPA, a 43.9% increase over the system without DMEA, while the addition of n-propanol (NPA) enabled highly efficient regeneration with 99.74% efficiency, a 27.2% improvement compared to the system without NPA. The absorbent also exhibited excellent cycling stability, maintaining 94.16% regeneration efficiency after five cycles. Mechanism investigations revealed that DMEA preferentially facilitated in the deprotonation of the MAPA-zwitterion during absorption, increasing the availability of free MAPA for CO 2 uptake and ultimately enhancing CO 2 absorption. During desorption, NPA served as a proton shuttle that redirected the proton transfer from a direct route to an indirect one via itself (protonated amine → NPA → MAPA-carbamate), significantly reducing the energy barrier. Meanwhile, NPA also participated in intermolecular proton exchange with the resulting carbamic acid, effectively promoting its thermal decomposition. Thermodynamics and corrosion analyzes confirmed that the optimized MAPA-DMEA-NPA system required only 0.43 GJ·ton −1 CO 2 in sensible and latent heat, 79.1% lower than the 30 wt% MEA solution, and exhibited negligible corrosiveness (2.5 × 10 −4 mm·year −1 on carbon steel). This work presented an effective dual-activator approach for designing high-performance NAAs with superior CO 2 capacity and regeneration stability, providing a promising pathway for advancing energy-efficient CO 2 capture technologies.
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高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2026
·Vol. 37
·期 9
·e70722
·
IF 3.8
Heng Quan,Yatong Tian,Chuanghui Ma,Zengfeng Wei,Lijie Ni,Sakil Mahmud
Inspired by the adhesive chemistry of mussel foot proteins, two catechol-functionalized polyamine chain extenders (NCA1 and NCA2) were synthesized via reductive amination and incorporated into zwitterionic waterborne polyurethane (WPUIP) systems for enhancing the wet rubbing fastness of denim fabrics. Structural characterization confirmed the successful synthesis of the chain extenders and their incorporation into the polyurethane backbone. The resulting emulsions exhibited excellent colloidal stability, maintaining stability over a pH range of 3–9, with particle sizes ranging from 73.37 to 278.36 nm and zeta potentials up to 42.17 mV. The introduction of catechol moieties improved thermal stability and surface hydrophobicity, while the enhanced wet rubbing performance was consistent with stronger catechol-mediated interfacial interactions. Denim fabrics treated with WPUIP displayed significantly enhanced wet rubbing fastness, increasing from < Grade 1 for untreated fabric to Grade 3–4, while maintaining dry rubbing fastness at Grade 4–5. Moreover, a maximum water contact angle of 152.5° was achieved, indicating excellent hydrophobicity. The synergistic integration of catechol-inspired adhesion and zwitterionic stabilization provides an effective strategy for developing high-performance textile fixing agents with broad process adaptability.
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高影响因子
ACS Omega
·
2023
·
IF 4.1
Yuming Nie,Ye Li,Huanjun Wang,Dongfang Guo,Lianbo Liu,Yonghong Fu
Fly ash from coal-fired power plants can enter chemical absorbents along with flue gas. Silica and metal oxides are the main components of fly ash. To explore the effect of the metal oxides on absorbents, we analyzed the integrated CO2 absorption–desorption process using N-methyldiethanolamine (MDEA) as the standard and an amine absorbent after adding different metal oxides. The effects of each metal oxide on CO2 capture by the MDEA solution, including CO2 reaction heat, absorption rate, cyclic loading, and carbonation rate, were assessed. It was found that supplementation with appropriate calcium oxide and magnesium oxide proportions accelerates the CO2 absorption rate and shortens the saturation time of the MDEA solution by 9%–17%. Magnesium oxide and calcium oxide were precipitated as carbonates during absorption. The CO2 reaction heat of the MDEA solution increased by 95% after adding magnesium oxide, thereby significantly increasing the energy consumption of the desorption process. On the basis of the experimental studies, the increase in CO2 absorption rate by MDEA after adding MgO and CaO may be mediated through two different mechanisms.
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PubMed
高影响因子
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