ACS Omega
·
2025
·
IF 4.3
Huibin Yu,Hongqin Ke,Tu Chen,Jia Huang,Lei Zhou,Shenqi Wang
This study aimed to develop a novel adsorbent, Zn2+-loaded hexanediamine–chitosan (HDA-CS) beads, for the selective removal of human testosterone from plasma. The preparation involved synthesizing chitosan beads, modifying them with hexanediamine to enhance adsorption capacity and subsequently loading them with zinc ions. The effects of the HDA spacer, Zn2+ concentration, and adsorption time on the adsorption percentage for testosterone were systematically investigated through a series of adsorption experiments. Results indicated that the Zn2+-HDA-CS beads achieved a maximum adsorption capacity of approximately 35% within 90 min. The analysis of plasma concentrations of Zn2+, albumin, and sex hormone-binding globulin (SHBG) indicated that the adsorption process involved a complex interaction between testosterone-bound SHBG and albumin for Zn2+ binding sites on the beads. Additionally, the adsorbent demonstrated good storage stability and selectivity for testosterone, with minimal impact on total protein content in plasma. These findings highlight the potential of Zn2+-HDA-CS beads as an effective therapeutic option for managing testosterone levels in clinical settings, particularly in patients undergoing androgen deprivation therapy for prostate cancer.
研究领域:
医学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Huanxin Li,Junwei Zhang,Yonghui Dou,Li Xu,Guoji Liu
Data of liquid–liquid equilibria (LLE) for water + 1,6-hexanediamine + 1-butanol and water + 1,6-hexanediamine + 1-pentanol ternary systems were determined at T = 298.2, 308.2, and 318.2 K under atmospheric pressure. The distribution coefficients and selectivity factors calculated from LLE data were applied to evaluate the feasibility and effectiveness of extracting 1,6-hexanediamine from the aqueous solution. The results showed that the selectivity factors decrease with the amount of 1,6-hexanediamine increasing in the aqueous phase, and the effect of temperature is insignificant in this study. The nonrandom two-liquid and universal quasichemical activity coefficient models were also applied to regress the experimental equilibrium data of the two ternary systems and the root mean square deviation values between the correlated and experimental results were lower than 0.7%. It turned out that these phase equilibrium behaviors can be described by the two models. Meanwhile, the binary model parameters were acquired from the relevant process simulations.
研究领域:
化学工程
·
物理化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Kaihua Su,Dongmin Zhao,Ai Lu,Chaoran Zhong,Xing-Can Shen,Changping Ruan
Hexavalent chromium Cr(VI) is one of the most toxic heavy metal pollutants in water due to its high water solubility, high toxicity, strong mutagenicity and carcinogenicity . To enable efficient Cr(VI) removal from wastewater, it remains difficult to fabricate advanced adsorbents with good selectivity and high adsorption capacity in large scale. Herein, a poly(hexamethylenediamine-tannic acid)-bacterial cellulose (denoted as HTA-BC) composite was prepared by using natural raw materials with abundance, low cost and nontoxicity in a facile one-step method and applied for the decontamination of highly toxic Cr(VI). The as-synthesized HTA-BC functionalized with abundant amino and phenolic hydroxyl groups had demonstrated high capacity (534.8 mg g −1 ) and good selectivity for Cr(VI) scavenging. Notably, the treatment of real water samples with the HTA-BC composite could efficiently reduce the concentration of the spiked Cr(VI) below the acceptable levels for drinking water . Moreover, high-purity Cr 2 O 3 was obtained by calcination of the Cr species-laden HTA-BC to ensure that the toxic Cr(VI) residing in the spent adsorbents can’t leak out into the surroundings, thus avoiding the secondary pollution. The natural abundance, low cost, easy availability, and sustainability of the raw materials, combined with the facile and green synthesis endowed the HTA-BC composite with great potential for not only decontaminating Cr(VI) wastewater, but also recycling Cr by calcination of the Cr-laden HTA-BC. Moreover, no secondary pollution would be brought during the synthesis and the post-treatment after the Cr(VI) removal, thus it is expected to be a green and sustainable approach for the purification of Cr(VI) containing wastewater.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 6
·1-8
·
IF 2.8
Zhu Rongli,Pu Zejun,He Gang,Peng Qiuxia,Zheng Pan,Wu Fang,Yu Dayang,Wang Xu,Hou Hongbo,Li Xianyong,Zhong Jiachun
Bio-based semi-aromatic poly (decamethylene terephthalamide) acid (PA10T) and a series of poly (decamethylene terephthalamide/hexamethylene terephthalamide) (PA10T/6 T) were synthesized by an efficient one-pot melt polymerization reaction. The chemical structures of the obtained samples were evaluated by fourier infrared spectroscopy (FT-IR). And the influence of addition of 1,6-hexanediamine (HAD) for copolyamides PA10T/6 T on melting points, thermal behaviors, crystallization performances, and mechanical characteristics of PA10T and PA10T/6 T were also analyzed thoroughly. The thermal analysis demonstrates that PA10T/6 T possess excellent thermal stability, and the melting temperatures can be tuned effectively by adding a suitable copolymerization content of the third monomer HAD to improve the processing properties appropriately. POM and XRD were used to research the crystallization behaviors showing that the addition of HAD did not alter the crystalline structure of PA10T essentially. Mechanical properties such as bending modulus and tensile strength of PA10T/6 T remarkably improved with increased HAD content. Moreover, this work provides an approach for preparing plant-derived semi-aromatic copolyamides PA10T/6 T, and these copolyamides exhibit outstanding processing performances, wider processing temperature range, high thermal stability, adjustable mechanical characteristics, and excellent comprehensive properties.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
POLYMER TESTING
·
2020
·
IF 3.275
Yinchun Hu,Yizhu Cheng,Xuerong Zhang,Di Huang,Weiyi Chen,Menglan Duan
β-cyclodextrin (β-CD) based materials have been studied widely as adsorbents and filter membranes for removing pollutants in air or water applications. The present study aimed to develop a sandwich structure of eletrospun nanofibrous membrane based on β-cyclodextrin and PA66 to achieve the high mechanical strength and flow-through adsorption of heavy metal ions in water. The surface and cross section morphology of PA66/β-cyclodextrin/PA66 nanofibrous membranes (PA66/β-CD/PA66 NMs) were examined using scanning electron microscopy (SEM). The physicochemical and mechanical properties of PA66/β-CD/PA66 NMs were analyzed by differential scanning calorimetry (DSC), thermogravimetric (TG) analysis and universal testing machine. The diameter of β-CD and PA66 electrospun fibers are 300–400 nm and 20–40 nm respectively. PA66/β-CD/PA66 NMs show a loosely arranged fibers and layer by layer structure. The tensile strength increases remarkably for PA66/β-CD/PA66 NMs, from 1.33 MPa of β-CD NMs to 23.17 MPa and the Young's modulus increases from 34.8 MPa to 253.3 MPa. The mechanical behavior of PA66/β-CD/PA66 NMs is a typical brittle fracture , and its microcosmic fracture diagrams are also involved. TGA/DSC results confirm the thermal crosslinking reaction is effective and complete. On the basis of SEM, DSC, TG and mechanical behavior analysis results, the molecular mechanism of in situ thermal crosslinking reaction is discussed. Fe 3+ 、Ni 2+ were used to confirm the ability to absorb heavy metal ions of PA66/β-CD/PA66 NMs. In conclusion, PA66/β-CD/PA66 NMs could be a promising solution for removal of metal ions by flow-through adsorption.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Hongwei Gao,Yongping Bai,Huihui Liu,Jinmei He
1,6-Hexylenediamine (HMDA) was chosen to replace part of ethylene glycol to develop a novel poly(ethylene terephthalate) structure with amide bonds. Four kinds of poly(ester amide)analogues (p-ETA) with different contents of amide bonds (1–4 mol %) were successfully synthesized via a new simple synthesis procedure. It was proved that the thermal stability and mechanical properties were significantly enhanced because of the introduction of amide bond units. More importantly, adding a small amount (1 mol %) of HMDA could effectively accelerate the orderly arrangement of molecular chains and formation of crystal nuclei proved by differential scanning calorimetry, X-ray diffraction, and polarized optical microscopy test results. It showed that the calendered p-ETA films acted as a good barrier to water and oxygen, expanding its application as packaging materials. Experimental results indicated that the introduction of amide bond units substantially promoted the overall performances of poly(ethylene terephthalate), such as crystallinity (28.4 vs 14.1%), tensile strength (60.9 vs 55.7 MPa), elongation at break (381 vs 226.8%), and so forth.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Yuan Zhou,Jin-Long Jiang,Xia-Ping Zhu,Wen Chen
In this study, attapulgite (ATP) was modified by Zr-based metal organic framework (UiO-66-NH 2 ) and poly(hexamethylenediamine-tannic acid) (HTA), an amino material named UiO-66-NH 2 /HTA/ATP (UHA) was prepared to efficiently remove Cr(VI). The morphology and structure of UHA were analyzed through various characterization methods. The conditions and influencing factors of UHA preparation and Cr(VI) adsorption were studied. The material had a maximum adsorption capacity of 270.3 mg/g for Cr(VI) when pH was 2.0, temperature was 298 K, adsorption time was 300 min, and ionic strength was 0.01 mol/L, which was obtained by the Langmuir fitting model. The adsorption process conforms to the pseudo-second-order kinetic and Langmuir isothermal models, indicating that the adsorption process is mainly based on the chemical adsorption of monolayers. X-ray photoelectron spectroscopy analysis shows that UHA mainly removes Cr(VI) by hydrogen bonding , electrostatic attraction, reduction, and complexation. Thermodynamic investigation suggested a disordered, endothermic and spontaneous adsorption process. After UHA treatment, the simulated wastewater containing Cr(VI) met the discharge standard, and the results of cycling experiments showed that UHA has good renewable performance and offers potential prospects for Cr(VI) removal in water.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
POLYMER SCIENCE SERIES B
·
2021
·Vol. 63
·期 3
·239-244
·
IF 1.049
Huanhuan Zhu,Niu Mingkang,Feng Zhongtai,Li Chengjie,Li Yonghao,Jiao Qingze,Wang Shanshan,Feng Caihong,Zhao Yun,Lv Yuzhen
Abstract To obtain aromatic polyamides with reduced dielectric constant, a series of aromatic polyamide copolymers derived from the reaction between m -phenylenediamine to trans -1,2-cyclohexanediamine and isophthaloyl chloride were synthesized using the low-temperature solution polymerization in the presence of 2-methylpyridine. The influence of the content of trans -1,2-cyclohexanediamine on the structure and properties of aromatic copolyamides was evaluated. With increasing the content of trans -1,2-cyclohexanediamine, the inherent viscosities of copolymers decrease from 1.95 to 1.14 dL/g. The copolymer with 25 mol % of trans -1,2-cyclohexanediamine has a reduced dielectric constant ε r of 4.61 at 1 MHz, which is 26% lower than homopolyamide. Meanwhile, as-synthesized aromatic polyamides and copolyamides show good thermal stability and mechanical properties.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 8
·45839
·
IF 1.86
Gang Wei,Kaijie Dong,Qinze Liu,Tingting Gao,Jinshui Yao
A silica-sphere–poly(catechol hexamethylenediamine) (PCHA–SiO 2 ) composite was prepared via the one-step facile polymerization of catechol and hexamethylenediamine; this method uses a silica sphere as a hard template. The chemical structures and morphologies of this composite were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, and transmission electron microscopy. The adsorption experiments indicated that the PCHA–SiO 2 composite served as a very attractive adsorbent for Pb(II)-, Cu(II)-, and Cd(II)-ion removal at lower concentrations and had very good selective adsorption abilities for Pb(II) and Cu(II) ions in a solution contaminated with these three ions at higher concentrations. These interesting results may have been due to the reversible H + adsorption–desorption properties of the characteristic phenol amine structure of the PCHA–SiO 2 composite. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45839.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2019
·Vol. 38
·期 2
·143-150
·
IF 2.804
Yang Sheng-Qing,Zhao Jin-Nan,Zhao Jing-Bo,Zhang Jun-Ying
Cross-linked polyamides (cPAs) were prepared through direct bulk Michael addition and subsequent polycondensation. Several mixed hexanediamine multi-esters (HDAMEs) were generated through the Michael addition of 1,6-hexanediamine (HDA) and methyl acrylate (MA) at 50 °C with different HDA/MA molar ratios. Melt polycondensation of HDAMEs then proceeded at 150 or 170 °C in flasks to obtain viscous fluids, and curing was continued in tetrafluoroethylene molds to obtain cPA films. The Michael addition was monitored on the basis of FTIR and ESI-MS spectra. The cPA films were characterized by DSC, TGA, dynamic mechanical analysis, and tensile test. These directly prepared cPAs exhibited T g of 1–39 °C, tensile strength of up to 45 MPa, and strain at break from 18% to 40%. The cPAs with high tensile strength and good toughness were successfully synthesized through the direct bulk Michael addition from HDA and MA followed with polycondensation.
研究领域:
聚合物科学
·
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Scientific Reports
·
2018
·Vol. 8
·期 1
·1-12
·
IF 4.122
Yue Rui,Chen Qiumeng,Li Siqi,Zhang Xiaodan,Huang Yuming,Feng Ping
Here, we reported a novel one-step hydrothermal route for the facile synthesis of 1,6-hexanediamine functionalized magnetic chitosan microspheres (AF-MCTS), which were characterized by TEM, FT-IR and XPS to look into its morphology, surface functional groups, and adsorption mechanism of Cr(VI) from the aqueous solution. Cr(VI) adsorption on AF-MCTS as a function of contact time, Cr(VI) concentration, pH, and ionic strength was investigated. The adsorption process follows the Langmuir isotherm model and pseudo-second-order kinetic model. The AF-MCTS exhibited high performance for Cr(VI) removal with very fast adsorption rate (reaching equilibrium within 5 min) and high adsorption capacity (208.33 mg/g), which was 1.1 to 12 times that of other chitosan-based adsorbents. Cr(VI) adsorption onto AF-MCTS was an endothermic and spontaneous process. The recovery and reuse of AF-MCTS was demonstrated 11 times without obvious decrease in adsorption capacity. Mechanism study suggested that –OH rather than –NH 2 groups in AF-MCTS were the electron donors for reducing Cr(VI) to Cr 3+ . Consumption or addition of H + could trigger the reversible supramolecular coordination between Cr 3+ and chitosan. Given the easy preparation, low cost, and remarkable performance, AF-MCTS composite is expected to show promising potential for the practical application in removing toxic Cr(VI) from aqueous media.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2019
·
IF 1.354
Kaijie Dong,Tao Hu,Gang Wei,Qinze Liu,Tingting Gao,Xian Zhang,Jinshui Yao
In this paper, the dye sludge which was prepared from Congo red solution by flocculation method was further modified by catechol and 1, 6-hexanediamine before usage to remove Cr(VI) ions. This particles were characterized by multiple testing means and the effects of removal, such as contact time, pH value, initial concentration, and temperature, were studied by batch mode. The maximum adsorption capacity of Cr(VI) was 282.48 mg/g and the whole process was spontaneous and endothermic. Hopefully, with the advantages of facile preparation and high adsorption capacity, the dye-based adsorbent has broad application prospects in the field of wastewater treatment.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 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）