SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Dongze Wang,Gang Chen,Xuemei Li,Qiong Jia
A β -cyclodextrin based hypercrosslinked polymer (Bn-CD-HCP) was prepared using 4,4′-bis(chloromethyl)-1,1′-biphenyl as the crosslinker via a Friedel-Crafts reaction. The Bn-CD-HCP material showed high surface area and thermal stability, making it an efficient adsorbent for albendazole, a benzimidazole carbamate. 8 was determined to be the best pH value for albendazole adsorption and the time necessary to reach equilibrium of adsorption was 30 min. The adsorption process agreed with the pseudo-second-order model and Langmuir isotherm model. A high adsorption capacity of 181.82 mg g −1 was achieved. The negative value of Gibbs free energy change suggested a spontaneous adsorption process. In addition, Bn-CD-HCP could be reused for albendazole adsorption for multiple cycles without significant losing its adsorption amount.
研究领域:
环境科学
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材料科学
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药学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Tong Liao,Jia Jia,Kang Tong,Jiuhong Ouyang,Wei Jiang,Xia-ping Zhu
A novel hyper-crosslinked 2, 8, 14, 20-tetraphenyl calix [4] resorcinol arene polymer (HCP-TCRA) was synthesized by using an external crosslinking of 2, 8, 14, 20-Tetraphenyl calix [4] resorcinol arene (TCRA) as monomers and dimethoxymethane as crosslinker. The HCP-TCRA was explored as a SPME fiber coating material. A variety of physicochemical characterization demonstrated that the material has excellent chemical/thermal stability and strong hydrophobicity. The fiber demonstrated fantastic adsorptive property for three synthetic estrogens (diethylstilbestrol, hexestrol, ethinyloestradiol, abbreviated to SESs). In this work, an efficient HCP-TCRA fiber-based SPME method was developed to analyze SESs by coupling with HPLC-MS detection. Under the optimized SPME conditions, this method was shown a wide range of linearity (2.0–100.0 ng mL −1 for diethylstilbestrol, 1.0–100.0 ng mL −1 for hexestrol, and 30.0–480.0 ng mL −1 for ethinyloestradiol), low limits of detection (LODs, 0.5 ng mL −1 for DES 0.3 ng mL −1 for HEX, 10.0 ng mL −1 for EES) and fine reusability (more than 30 times). Finally, the proposed methods had been applied to the determination of SESs in milk samples with a simple pretreatment. At three different levels, relative recoveries presented between 86.7 and 106.4%. The method put up highly sensitive and budget-friendly in detection SESs, and has capacity in quality control of milk products.
研究领域:
分析化学
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食品安全
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 5
·2028
·
IF 4.6
Chaohua Song,Longfei Peng,Yinhui Li,Yawei Du,Zan Chen,Weixin Li,Cuijia Duan,Biao Yuan,Shuo Yan,Sibudjing Kawi
Novel polymers applied in economic membrane technologies are a perennial hot topic in the fields of natural gas purification and O2enrichment. Herein, novel hypercrosslinked polymers (HCPs) incorporating 6FDA-based polyimide (PI) MMMs were prepared via a casting method for enhancing transport of different gases (CO2, CH4, O2, and N2). Intact HCPs/PI MMMs could be obtained due to good compatibility between the HCPs and PI. Pure gas permeation experiments showed that compared with pure PI film, the addition of HCPs effectively promotes gas transport, increases gas permeability, and maintains ideal selectivity. The permeabilities of HCPs/PI MMMs toward CO2and O2were as high as 105.85 Barrer and 24.03 Barrer, respectively, and the ideal selectivities of CO2/CH4and O2/N2were 15.67 and 3.00, respectively. Molecular simulations further verified that adding HCPs was beneficial to gas transport. Thus, HCPs have potential utility in fabrication of MMMs for facilitating gas transport in the fields of natural gas purification and O2enrichment.Keywords:6FDA-based polyimide;hypercrosslinking polymers;gas transport;molecular simulations
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
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2024
·
IF 4.4
Mengjie Peng,Hui Gao,Yanlong Gu,Bien Tan
The design and synthesis of a series of palladium-loaded hyper-cross-linked polymer (HCP) catalysts, demonstrating high catalytic activity and excellent cycling stability in Suzuki–Miyaura and Buchwald–Hartwig coupling reactions is reported. By employing pyridine-functionalized BIAN-NHC as the building unit, HCPs with rich hierarchical pore structures and high surface areas were prepared. Notably, HCP-BIAN-Pd-2 exhibited superior catalytic activity and achieved a 99% yield with less reactive benzyl chloride, maintaining a 95% yield even after 10 cycles. This study addresses the issues of cost, toxicity, and recyclability associated with traditional homogeneous palladium catalysts, significantly enhancing the catalytic activity and stability by selectively introducing pyridine-functionalized BIAN-NHC ligands. These findings highlight the immense potential of these catalysts for large-scale production and practical applications, underscoring their significant practical implications in the field of heterogeneous catalysis.
研究领域:
催化化学
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材料科学
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有机合成
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2020
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IF 4.3
Lili Zhang,Lin Yao,Lingfei Ye,Bingwen Long,Yafen Dai,Yigang Ding
In this study, benzimidazole-based hyper-cross-linked polymers (HCPs) with hierarchical pores were synthesized through facile one-step Friedel-Crafts reaction and applied to the adsorption of chlortetracycline from aqueous solution. The mole ratio of benzene to benzimidazole exerted a significant impact on the morphology and adsorption performance. The nano-layer structures of HCPs brought in considerable surface area while the hierarchical canals allowed free mass transfer, which facilitated effective contact between Lewis basic active sites and guest molecules. The chlortetracycline adsorption capacity of HCPs reached 456 mg g −1 , higher than that of many other reported adsorbents. The adsorption equilibrium was achieved within 6 h and the kinetics complied with the pseudo-second-order rate equation. The equilibrium data were in good line with the Freundlich isotherm model, by which the adsorption thermodynamic parameters were obtained. Electron donor-acceptor (EDA) interaction, π−π interaction and hydrogen bonding were considered to be the main adsorption mechanism. HCPs could be easily regenerated by ethyl acetate elution. Moreover, HCPs could also adsorb other organic pollutants containing phenolic hydroxyl groups. The low-cost preparation, high adsorption capacity and easy regeneration proved the as-synthesized HCPs were ideal adsorbents for the removal of organic pollutants from wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
Yangqi Gan,Gui Chen,Yafei Sang,Fa Zhou,Ruilin Man,Jianhan Huang
Herein oxygen-rich hyper-cross-linked polymers with hierarchical porosity were developed via two continuous Friedel-Crafts reactions. Their aniline adsorption was evaluated from aqueous solution. It indicated that the first Friedel-Crafts reaction introduced plentiful oxygen (O) on the polymers with the O content of 12.53 wt%. The second Friedel-Crafts reaction produced predominated micropores with micropore area over the Brunauer-Emmett-Teller (BET) surface area of 56.8%, the hierarchical porosity including micropores, mesopores, and macropores were characteristic for the as-fabricated polymers. The aniline adsorption was largely improved on the synthesized polymers, in which the maximum capacity was 178.4 mg/g at 303 K as the introduced O and the manufactured micropores were greatly beneficial for the adsorption. The Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy demonstrated that the introduced O as a functional of the C O, C O, and O H groups strongly interacted with aniline. More importantly, 80 min was sufficient to reach the equilibrium, 0.6 g the polymers made the aniline solution (<40 mg/L) meet the discharge requirement of Chinese environmental protection authorities (<5 mg/L).
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xue-fang Chen,Hai-long Li,Xu-ran Ji,Zhi-jie Shen,Hai-jun Guo,Shi-miao Yao,Meng-kun Wang,Lian Xiong,Xin-de Chen
Sugarcane molasses is a by-product in the process of sugar production, which has characteristics of large quantity, low price and easy to pollute the environment. High-valued utilization of sugarcane molasses has important research significance. In this work, 5-hydroxymethylfurfural (HMF) was obtained through hydrolyzing sugarcane molasses, and was separated from the hydrolysate by a designed hyper-cross-linked adsorption resin (HCLR). The optimal conditions for adsorption/desorption of HMF by HCLR were obtained. On this basis, the adsorption kinetics, equilibrium and thermodynamic behavior of HMF onto HCLR were studied, and the adsorption mechanism of HMF onto HCLR was clarified. At last, HMF with a highest purity of 96.0% and an average purity of 93.2% were obtained through fixed bed dynamic adsorption/desorption study. Overall, this work provides a complete process route from sugarcane molasses to high-value product of HMF, and provides theoretical and technical references for the efficient and comprehensive utilization of sugarcane molasses resources.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
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2019
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IF 4.346
Changhui Liu,Yan Song,Ze Xu,Jiateng Zhao,Zhonghao Rao
Thermal energy storage and release is of great interest in solving mismatch between energy supply and demand. Latent heat capacity and thermal conductivity are the two main factors needed to be considered for practical applications of shape-stabilization phase change materials (PCMs). Herein, a hierarchical hypercrosslinked polymer (HCP)/expanded graphite (EG) composite, could fulfill both superior high specific surface area and thermal conductivity requirements, was synthesized via an in-situ growth protocol in the pore of expanded graphite . It was suggested that a synergistic working mechanism existed between EG and HCP, where EG acted as a macro pore system for the inhibition of HCP aggregation, which could thus enable a better encapsulation rate of PCM in HCP; while HCP played a role for the highly efficient encapsulation owing to its high specific surface area. Hierarchical structured HCP/EG composite exhibits promising performance when used as a PCM supporting material that the encapsulation rate of the composite could reach to 89.4% without observation of any leakage, and the thermal conductivity is up to 3.7 W•m −1 •K −1 . Additionally, the prepared PCM composites display a superior heat energy storage and light-to-thermal conversion performance over pure paraffin, indicating its great potential to be used in thermal energy storage.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Pengju Shi,Xueqin Chen,Zhengguang Sun,Cao Li,Ziqiang Xu,Xueliang Jiang,Bingbing Jiang
Thickness controllable porous polymer nanofilm with superior gas storage capacity has gradually emerged as promising adsorbents for capture of CO 2 , due to extremely high surface area and micro-scale pore. In this work, we have developed a novel and facile strategy to fabricate thickness controllable two or three dimensional ordered porous nanofilm based on poly(styrene-butyl acrylate), in combination with covalently layer by layer (LBL) self-assemble process and hypercrosslinked post-treatment. Abundant microporous structures and a small number of mesoporous structures are formed in hypercorsslinked nanofilm and corresponding surface area derived from Brunauer-Emmett-Teller method (BET) were determined to be 605.7 m 2 /g. The capacity of CO 2 capture was also measured, which reach up to 53.6 wt% (12.2 mmol/g) at 273 K/1 bar, which is comparable to highest record. We have found that all the as prepared nanofilm with different thickness exhibited apparently enhanced micro- and meso-porosity after hypercrosslinking. Moreover, with the increase of thickness of nanofilm, the adsorption capacity decreases gradually, as well as the CO 2 adsorption capacity. An excellent recycling capacity for CO 2 capture have also found for this porous polymer nanofilm via repetitive adsorption-desorption assay. Our work confirmed that thickness controllable porous polymer nanofilm with superior CO 2 capture capacity can be fabricated by a very simple strategy which can meet the challenges of the current CO 2 capture and storage technology.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Xiaofeng You,Yan Wang,Lin Han,Qing Liu,Zhaoyang Fei,Xian Chen,Zhuxiu Zhang,Jihai Tang,Mifen Cui,Xu Qiao
Hyper-cross-linked resin has enormous potential in the removal of organic dyes from aqueous solutions due to its adjustable porous structure and designable chemical properties, whereas its poor adsorption capacity limits the application. In this study, the co-modified hyper-cross-linked resin (HCP-x) with tunable porosity was synthesized by adjusting the dosages of 4-vinylpyridine (4-VP) and 4-vinylbenzoic acid (4-VA) in the polymerization process. The results indicated that pores in the range of 4–12 nm show up in HCP-x resin with the addition of 4-VP and 4-VA. Particularly, the polymer containing 10% by weight of monomer (HCP-90) had the highest specific surface area, the largest micropore volume and a bigger mesoporous volume in the terpolymer . The adsorption experiment results demonstrated that HCP-90 showed 4 times increased Rhodamine B adsorption than the original resin. This study described a simple method to co-modify the hyper-cross-linked resin by introducing two functional monomers, and the modified material was potential for Rhodamine B adsorption.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Rutong Zhang,Fang Wang,Meng Li,Wenhui Gong,Qibin Chen
The separation of racemic mixtures remains a great challenge due to the similar physicochemical properties of enantiomers in an achiral environment. Currently, membrane-based separations often face a trade-off between permeability and enantioselectivity. In this study, a uniquely fibrous nanotube membrane, derived from a chiral hyper-crosslinked polymer (CHCP), was constructed and used to separate racemates, motivated by the need for more efficient and scalable separation methods. The results show that such the CHCP-based nanotube membrane exhibits a 2–4 orders of magnitude increase in flux compared to conventional chiral separation membranes and a ca. one order of magnitude improvement relative to GO-based membranes, while maintaining the superior enantioselectivity. This can be attributed to the CHCP-based nanotube that is rich in the micropore and mesopore, thereby resulting in the ultimate membrane that is characteristic of the hierarchically porous structure and the high porosity. Moreover, this membrane displays a great stability, which offers a significant potential for scalable and continuous operations. Experimental studies, combined with density functional theory calculations, substantiate that this membrane follows the retarded transport mechanism, having a great promise in resolving the inherent trade-off. Our findings suggest that this CHCP-based nanotube can find applications in various fields, e.g., separation, catalysis, etc., due to its intrinsic porosity, good processability and ease of synthesis and modifiability.
研究领域:
材料科学
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化学工程
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分离技术
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Shiyi Wang,Xiaojing Sun,Longfei Xie,Yujing Ji,Liwen Lu,Yuqing Chen,Haomin Huang,Daiqi Ye
To overcome the worldwide environmental crisis related to the continuous emission of CO 2 , the use of porous organic polymers, which are excellent absorbents and conversion materials, to reduce CO 2 emission is of great significance. Among them, hyper-crosslinked polymers (HCPs) are porous materials with a high pore density that are synthesized using a simple one-pot method that is economical and can realized at a low temperature, hence they have good application prospects as adsorbents for CO 2 . In this study, a batch of petroleum coke-based HCPs with different sulfur contents was prepared via the one-pot Friedel-Crafts alkylation reaction using inexpensive and abundant petroleum coke as raw material. Thereafter, the use of the prepared materials for CO 2 adsorption revealed that the HCPs with a high sulfur content had a larger specific surface area (825 m 2 /g) and showed a higher CO 2 adsorption capacity (2.1603 mmol/g at 1 bar 298 K) than its counterpart with a lower sulfur content. Thus, the presence of sulfur significantly enhanced the CO 2 adsorption performance of the material. Further, the simulation of the heat of adsorption of HCPs with and without sulfur using Material Studio also confirmed the higher CO 2 capture efficacy of HCPs with a higher sulfur content.
研究领域:
材料科学
·
环境科学
✓ 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）