JOURNAL OF MOLECULAR LIQUIDS
·
2017
·
IF 3.648
Junwei Zhang,Hang Li,Xiao Ma,Huanxin Li,Shuai Yang,Li Xu,Guoji Liu
The solubility of 1,6-Hexanediol in (ethyl acetate + methanol) and (ethyl acetate + n-butanol) binary solvents was determined by isothermal saturation method at atmospheric pressure of 101 kPa. The solubility of 1,6-Hexanediol in the two binary solvents increases with the increase of temperature at fixed mass fraction of ethyl acetate from 278.15 K to 298.15 K, and decreases with the increase of mass fraction of ethyl acetate at fixed temperature. In addition, experimental solubility data were correlated by modified Apelblat equations, Jouyban-Acree model and Sun model. Furthermore, the standard dissolution enthalpy was calculated.
研究领域:
物理化学
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热力学
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2017
·
IF 3.648
Junwei Zhang,Shuai Yang,Hang Li,Pengpeng Yu,Li Xu,Guoji Liu
The solubility of 1,6-Hexanediol in (methanol + dimethyl adipate (DMA)), ( n -butanol + DMA) binary solvents was measured by the dynamic method under 0.1 MPa. The studies were carried out at different mass fractions of methanol or n -butanol from 283.15 K to 303.15 K. The solubility of 1,6-Hexanediol in binary solvents increases with increasing temperature and mass fraction of methanol or n -butanol. In a fixed temperature and fixed mass fraction of methanol or n -butanol, the solubility of 1,6-Hexanediol in (methanol + DMA) is greater than in ( n -butanol + DMA). In addition, the experimental solubility data were correlated by Jouyban–Acree model, Van't Hoff–Jouyban–Acree model, modified Apelblat–Jouyban–Acree model and Sun model, in which the Sun model shows the best agreement with the experimental solubility data. The maximum of relative average deviation ( RAD ) and the root-mean-square deviation ( RMSD ) between the experimental and calculated solubility were 5.85 × 10 − 2 and 3.80 × 10 − 2 , respectively. Additionally, the thermodynamic properties (including enthalpy, Gibbs energy and entropy) were also obtained, and the results show that the dissolution of 1,6-Hexanediol in the two binary solvents is an endothermic process.
研究领域:
物理化学
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热力学
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高影响因子
Nano Research
·
2023
·Vol. 16
·期 10
·12270-12280
·
IF 9.9
Jiang Fengyang,Lan Tian,Sun Jiaqiang,Zhao Guofeng,Lu Yong
The gas-phase dehydrogenation of 1,6-hexanediol (1,6-HDO) to ε-caprolactone (ε-CL) over the high-performance Cu-based catalysts is highly desirable, but with grand challenges, because the Cu nanoparticles (NPs) are easy to be sintered with the low Hüttig temperature (< 150 °C vs. > 250 °C of reaction temperature). Herein, we report a highly efficient silica-encapsulated nano-Cu catalyst (Cu@SiO 2 /SiO 2 ) prepared via a complexation-impregnation method for the dehydrogenation of 1,6-HDO, exhibiting a 1,6-HDO conversion of 95.3% and ε-CL selectivity of 80.0% at 270 °C. The catalyst also has the outstanding thermal stability (without sintering up to 270 °C for 100 h on stream), which can be attributed to the effective encapsulation of the SiO 2 shell. In addition, the reaction network of 1,6-HDO dehydrogenation is proved. Finally, the pyridine-diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and in-situ X-ray photoelectron spectroscopy (XPS) reveal that the Cu 0 species favor the conversion of 1,6-HDO to ε-CL. The synergistic effect of Cu + and Cu 0 benefits the conversion of ε-CL to 2-methylcyclopentanone (2-MCPN). This study is beneficial for designing the high-performance Cu-based catalysts for 1,6-HDO to ε-CL, understanding the reaction network of 1,6-HDO dehydrogenation over the Cu-based catalysts, and offering a strong foundation for the large-scale production of ε-CL.
研究领域:
化学工程
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材料科学
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催化反应
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高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2022
·Vol. 31
·期 3
·1144-1159
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IF 4.705
Siegu William Mawuko Kodzo,Djouonkep Lesly Dasilva Wandji,Selabi Naomie Beolle Songwe,Bonku Emmanuel Mintah,Cheng Zhengzai,Gauthier Mario
The rising cost of petrochemicals owing to the rapid depletion of fossil resources has gradually divert research interest to novel chemicals derived from biomass feedstock. In this study we explored the synthesis, properties and ecotoxicity of a series of sustainable poly(hexylene 2,5-thiophenedicarboxylate- co -bis(2-hydroxyethoxybenzene)s (PTBHs) copolyesters suitable as form-fil-seal packaging materials. From the results, simply varying the ratios of HDO/BHEB afford control over the copolymers crystallinity, thermal and mechanical properties including degradability. The thermal analysis revealed the copolyesters possess satisfactory glass transition temperature (T g ) ranging from 75 to 112 °C and melting point from 160 to 205 °C, which are comparable to poly(ethylene furanoate) PEF and superior to poly(ethylene terephthalate) PET. These novel biopolymers exhibit tensile strength between 53 and 72 MPa and elongation at break of over 780%, higher than their corresponding homopolyesters. These promising properties were optimized with the increase of TH content, ranging from TB-enriched to TH-enriched copolyesters, exhibiting satisfactory heat-seal strength in the range of 0.77–0.45 N/mm. The biopolymers exhibit the potential as mere replacements to PETs, but their cost-rentability still needs to be investigated. Graphical Abstract The authors synthesized a novel class of fully non-toxic thiophene biopolymers and showed the synergistic effect of HDO on the structure, thermal and mechanical properties.
研究领域:
材料科学
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环境科学
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2020
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IF 2.888
Xingchuan Yang,Xiangmeng Chen,Chunmei Cao,Li Xu,Guoji Liu
Solubility and liquid–liquid equilibria data for ternary systems for (water + 1,6-hexanediol + 1-butanol/2-methyl-1-propanol) were obtained at (293.15–323.15) K under atmospheric pressure. The LLE data were determined using a double-jacketed glass vessel, and the solubility curves were acquired by the cloud-point method. The distribution coefficient and separation factors were calculated and the reliability of experimental data was assessed by the Othmer–Tobias equation and Hand equation. The measured LLE data were fitted by NRTL and UNIQUAC models and binary parameters were obtained by using of Aspen Plus software. The calculated root-mean-square deviation values show that the calculated results from models showed good agreement with experimental data.
研究领域:
化学工程
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热力学
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2020
·
IF 2.888
Xingchuan Yang,Huanxin Li,Chunmei Cao,Li Xu,Guoji Liu
Liquid-liquid equilibria (LLE) data for ternary systems of water + 1,6-hexanediol + 1-pentanol/ 3-methyl-1-butanol/ 2-methyl-2-butanol were measured at (293.15, 303.15, 313.15 and 323.15) K under 101.3 kPa. Cloud-point method was applied to determine the solubility curves data. Distribution coefficient and separation factors for 1,6-hexanediol were calculated from the measured tie-line data to evaluate the extraction effect of alcohols on 1,6-hexanediol. The reliability of experimental LLE data were tested by Othmer–Tobias equation and Hand equation, NRTL and UNIQUAC models were applied to correlate the measured data and the calculated results show that both models can fit the experimental data very well.
研究领域:
化学工程
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热力学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
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IF 2.298
Xingchuan Yang,Huanxin Li,Chunmei Cao,Zongpeng Zou,Li Xu,Guoji Liu
Saturated vapor pressures of pure dimethyl adipate and isobaric vapor–liquid equilibrium (VLE) data for the binary system of dimethyl adipate + 1,6-hexanediol at 10, 20, and 99 kPa were determined by a modified Othmer still. All of the VLE data passed the thermodynamic consistency test by Wisniak and Van Ness methods. The experimental data were correlated with the NRTL, Wilson, and UNIQUAC models. The results showed that the UNIQUAC model is slightly better among the three models.
研究领域:
化学工程
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热力学
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高影响因子
Small
·
2025
·
IF 12.1
Zhaoxin Li,Zewen Shen,Haotian Zhang,Chumin Yan,Lisha Yin,Yezi Hu,Guangtong Hai,Guixia Zhao,Xiubing Huang
Terminal bifunctional aliphatic compounds are important intermediates for synthesis of drugs, food additives, polymers, while oxidative conversion from diols in mild conditions and the insight mechanism are rarely investigated. In this work, Pt-loaded BiVO 4 (4%Pt/S-BVO and 4%Pt/H-BVO) is proposed to be utilized for the oxidation of 1,6-hexanediol (1,6-HDO). In dark conditions, the electronic metal-support interactions between Pt and BiVO 4 and abundant oxygen vacancies (OVs) activated C-H and O 2 , leading to the primary oxidation of terminal hydroxyl group of 1,6-HDO. The generated·O 2 − radicals enable further oxidation of aldehyde group to carboxyl group. With illumination, the photo-generated holes promoted oxidation of hydroxyl group to aldehyde group while the increased ·O 2 − radicals promoted the oxidation of aldehyde group to carboxyl group. The introduced heat originated from the photothermal effect and an additional heat source is supposed to boost the mass transfer of molecules and ·O 2 − radicals. In particular, with more abundant OVs and exposed {040} facets, more ·O 2 − radicals, and improved charge separation, 4%Pt/S-BVO exhibit 90% conversion of 1,6-HDO with selectivity of 98.6% to TBACs in 6 h. Those findings highlight the great promise of catalytic organics transformation by integrating solar energy to enhance the reaction efficiency.
研究领域:
催化化学
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材料科学
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有机合成
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DOI
PubMed
高影响因子
MOLECULES
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2025
·Vol. 30
·期 16
·3376
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IF 4.6
Jian Chen,Afang Zhang
Solid–liquid phase change materials (PCMs) have attracted significant attention due to their high enthalpy, which enables superior energy storage density. However, it is difficult to maintain their original shapes in a molten state. Therefore, confining PCMs within porous materials is an important method, either through mixing molten polymers and PCMs or confining PCMs in pre-prepared porous materials (e.g., aerogels). The former method is straightforward and easy to execute but its stability is severely limited, and the latter is exactly the opposite. Herein, aerogel-confined functional liquid made via in situ solid–liquid host–guest composite strategy is reported. As a proof of concept, Nylon 66 and 1,6-hexanediol are selected as the solid and liquid phases, respectively. 1,6-hexanediol not only serves as a solvent to dissolve Nylon 66 but also induces sol–gel transition during the cooling process and acts as a PCM to store energy. Unlike aerogel-supported systems requiring multi-step processing, this approach integrates porous host formation and PCM encapsulation in one step. The resulting shape-stabilized PCMs (ss-PCMs) exhibit obscure leakage, high latent heat (160 J/g), mechanical robustness (compressive modulus of 3.6 MPa), and low thermal conductivity (0.081 W/(m·K)) above 75 wt% loading of 1,6-hexanediol. These ss-PCMs enable infrared stealth by delaying thermal detection and passive thermal buffering that suppress temperature fluctuations. The in situ solid–liquid host–guest composite strategy is straightforward, being achievable through a one-pot method involving heating and cooling cycles, with high raw material utilization and minimal waste generation, thus maximizing the conversion rate of raw materials into the final product. By combining the excellent liquid retention capability of aerogels with process simplicity, this methodology opens new avenues for the development of ss-PCMs.
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PubMed
高影响因子
POLYMER BULLETIN
·
2023
·
IF 3.2
Zheng Rui,Cai Zhengyu,Shen Jianfen,Wang Chaoming,Xie Shuaiao,Qi Zhiyong
The development of thermal energy storage materials applied in various fields has been attracting considerable attention in recent years. In this paper, a series of 1,6-hexanediol (HDL)/silicon dioxide (SiO 2 ) form-stable composite phase change materials (fs-CPCMs) with various mass percentage of HDL loadings were made through sol–gel technique. For HDL/SiO 2 fs-CPCMs, HDL was served as PCM, and silica gel was acted as the supporting matrix to keep a stable state without leakage of the composites even the temperature was over 85 °C. The results from form-stability test and DSC measurements showed that the as-prepared fs-CPCM with the mass fraction of HDL at 70 wt% presented good form-stability, suitable melting point (43.5 °C), and reasonable fusion enthalpy of 130.9 J/g. Fourier transform infrared (FT-IR) spectroscopy indicated that only physical adsorption existed between the HDL and silica gel. Moreover, the thermal performance tests showed that the thermal energy storage and release rates of the as-prepared HDL/SiO 2 fs-CPCM was enhanced compared to pure HDL. In summary, the as-prepared fs-CPCMs exhibit reasonable latent heats, good thermal stabilities, and reliability, which are promising candidates for energy-saving construction materials.
研究领域:
材料科学
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热能存储
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复合材料
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2019
·
IF 4.561
Xingchuan Yang,Huanxin Li,Chunmei Cao,Li Xu,Guoji Liu
Solubility and liquid-liquid equilibria data for dimethyl adipate +1,6-hexanediol + water or ethylene glycol ternary systems at T = 313.15K and 323.15K under atmospheric pressure were measured. The distribution coefficient and separation factors were calculated according to the tie-line data and water was considered to be the suitable solvent to extract 1,6-hexanediol. The Othmer–Tobias and the Bachman equations were used to test the reliability of the experimental data. Besides, the experimental data were correlated with the NRTL and UNIQUAC models. It turned out to be that the calculated results from the two models had good agreement with the experimental data.
研究领域:
化学工程
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物理化学
·
热力学
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Yiting Geng,Zhao Wang,Xiaoran Hu,Yan Li,Qinan Zhang,Yujie Li,Runguo Wang,Liqun Zhang
The 3D-printing technology allows to manufacture polymers into desired shape. This work presents novel bio-based copolyesters (PHPF) prepared by the polycondensation of 2,5-furandicarboxylic acid, 1,6-hexanediol and 1,2-propanediol as 3D-printed materials. These PHPF exhibit superior thermal stability. By tailoring the contents of 1,2-PDO, the PHPF exhibit optimum mechanical properties with tensile strength of 42.7 Mpa, elongation at break of 515% and impact strength of 35.62 KJ/m 2 , respectively. The 3D-printed PHPF shows a satisfactory mechanical properties obtained from tensile test and reliable microstructure observed by SEM. Both the thermal stability and mechanical properties of PHPF were far beyond polylactide, a present most used bio-based 3D-printed polymer, which revealed PHPF deserve to be promising 3D-printing materials.
研究领域:
材料科学
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高分子科学
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3D打印
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DOI
高影响因子
危险品化学品经营许可证（带存储）