JOURNAL OF MOLECULAR LIQUIDS
·
2013
·
IF 1.684
Wenbiao Zhi,Yonghong Hu,Wenge Yang,Yumei Kai,Zheng Cao
The solubility of d -sorbitol was measured in methanol, ethanol, n-propanol, n-butanol, THF, acetone, ethyl acetate and acetonitrile at temperatures ranging from 278.15 to 333.15 K under atmospheric pressure by gravimetric method. The solubility data were correlated with modified Apelblat equation and λh equation which showed that the solubility of d -sorbitol in these organic solvents increased with increasing temperature. The thermodynamic properties of the dissolution process, including enthalpy, entropy and Gibbs energy , were calculated by means of van't Hoff analysis and Gibbs equation. According to the experimental results, ethanol showed to be a relatively better solvent in crystallization process of d -sorbitol.
研究领域:
物理化学
·
化工
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2013
·Vol. 31
·期 8
·1095-1101
·
IF 0.917
Hongyan Bai,Qian Sun,Haiyu Tian,Junhong Qian,Lingyi Zhang,Weibing Zhang
A single boronic acid-based fluorescent probe (compound CSP) for saccharides was designed and synthesized. The probe, with an α , β -unsaturated ketone conjugated into the coumarin fluorophore, was synthesized by 4 steps from the commercial material 4-diethylamino salicylaldehyde. The electron push-pull effect is enhanced with the N , N -diethyl amino as the electron donor and the carbonyl as the electron acceptor. Both the absorption (463 nm) and emission (616 nm) maxima of CSP are in the visible wavelength region with a Stokes shift of about 150 nm, which ensures CSP a potential probe for biological application. Under near physiological conditions, significant fluorescence enhancement of CSP was observed upon the addition of some saccharides, namely, D -sorbitol, D -fructose, D -glucose, D -mannose and D -galactose. The probe showed relatively high sensitivity towards D -fructose and D -sorbitol, and their detection limits were 0.05 mmol/L and 0.1 mmol/L, respectively.
研究领域:
分析化学
·
生物化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Biao Yang,Xinyu Wan
Nucleating agents, especially those with small particle sizes, are preferred to boost the nucleation density and crystallinity of poly(lactic acid) (PLA) due to its weak crystallization capability. Organophilicly modified nanofillers hardly alter the nucleation and crystallinity of non-isothermally crystallized PLA. Herein, nano-silica adsorbed trace D -sorbitol (m-SiO 2 ) as a heterogeneous nucleating agent was melt-mixed with poly( L -lactic acid) (PLLA), and the isothermal and non-isothermal crystallization behavior, as well as crystallization kinetics, were investigated. Transmission electron microscopy (TEM) revealed that m-SiO 2 was uniformly dispersed in the PLA matrix as 100–300 nm clusters. Differential scanning calorimetry (DSC) and polarized optical microscopy (POM) showed that the nucleation rate and density of the non-isothermally crystallized PLLA/m-SiO 2 composites were significantly improved. Despite the fact that m-SiO 2 does not raise the overall non-isothermal crystallization rate, the crystallization temperature and crystallinity of the PLLA/3%m-SiO 2 composite increased from 97.2 °C and 6.8 % for neat PLLA to 108.2 °C and 48.6 % (10 °C/min cooling rate), respectively. The Avrami exponent n of isothermal crystallization remains unchanged, while the crystallization rate increases dramatically. Both isothermal and non-isothermal crystallization have increased activation energies. The heat deflection temperature increased from 59 °C of neat PLLA to 152 °C with a 50 % increase in impact strength.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Teng Li,Ping Jin,Yekai Zhang,Kexin Huang,Jingen Long,Jun Jiang,Shengqin Liu,Ayusman Sen,Weiran Yang
As an important biomass-derived chemical, d-sorbitol can be converted to a variety of useful chemicals and fuels. Because of the strong nucleophilicity of I– and reducibility of hydrogen iodide (HI), hydroiodic acid has been used for polyol hydrogenolysis with high selectivity. Here, d-sorbitol was converted by HI, rhodium, and hydrogen to give a high yield of iodohexanes (94.2%) at 373 K in a water/cyclohexane biphasic system. Rhodium and hydrogen were used to regenerate HI in situ. The reaction mechanism was studied in detail by using model molecules. The substitution–elimination–addition (SEA) mechanism was proven to be the most possible pathway. The high concentration of both proton and iodide was found to be necessary for the efficient conversion of d-sorbitol and the selective formation of iodohexanes. Besides, water could inhibit the conversion of d-sorbitol dramatically. These findings were explained by kinetic study and demonstrated in the reaction kinetic equation. This catalytic system, including HI and RhCl3, was proven to be reusable. In addition, iodohexanes can be quantitatively converted to hexenes over ZrO2 at 473 K.
研究领域:
化学工程
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生物质转化
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2017
·
IF 3.648
Yonghong Hu,Yemin Yu,Yuhao Zhang,Wenge Yang,Tao Li,Renlun Deng,Min Jiang
The solid-liquid equilibrium (SLE) of d -sorbitol in (ethanol + acetonitrile) binary solvent mixtures was explored at temperatures ranging from 278.15 K to 333.15 K under 0.1 MPa. For the temperature range investigated, the equilibrium solubility varies with the composition of the solvent and temperature. The equilibrium solubility data were then modelled using modified Apelblat equation, a variant of the combined nearly ideal binary solvent/Redich-Kister (GSM) model and Jouyban-Acree model. Computational results showed that the modified Apelblat equation and CNIBS/R-K model have the low mean deviation ( MD ). In addition, the thermodynamic properties of the solution process, including the Gibbs energy , enthalpy, and entropy were calculated by the van't Hoff analysis.
研究领域:
化学工程
·
物理化学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2013
·
IF 3.607
Jingjing Li,Kaiqi Fan,Libo Niu,Yuanchao Li,Jian Song
The effect of salt on the gelatinization of 2,4-(3,4-dichlorobenzylidene)-d-sorbitol (DCBS), a novel low-molecular-weight gelator, was studied. DCBS showed pronounced hydrogelation and the electron micrographs indicated that the hydrogels consists of globular aggregates. Addition of NaCl to the aqueous medium accelerated the gelation process and also caused the gel’s morphology to change from globular to long fibers. In addition, the thermal properties of the hydrogels were improved with the addition of NaCl. UV–vis and fluorescence emission spectra showed that extensive aggregation of the phenyl rings was responsible for the gelation. The presence of NaCl induced a red shift in the emission peaks of DCBS and a decrease of the pyrene polarity index I1/I3 in the gels, which indicated that there was more π–π stacking in the hydrogels with NaCl than in the gels without NaCl. Variable-temperature 1H NMR spectra further demonstrated that the π–π interactions were enhanced by NaCl. FTIR studies showed that hydrogen bonding was also a contributing factor in the gelation process. Wide-angle X-ray diffraction (WXRD) showed that the hydrogels had a layered structure which did not change with the addition of NaCl. Density functional theory (DFT) calculations indicated the possible molecular packing of the gelator in the nanofibers.
研究领域:
材料科学
·
化学
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产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Jinke Yu,Ling Sun,Lan Ding,Yufei Cao,Xiaohui Liu,Yuanlin Ren,Yuesheng Li
When confronted with a fire, the flammability of rigid polyurethane foam (RPUF) makes it extremely easy to burn violently. In this work, a green biomass derived flame retardant coating was synthesized with phytic acid as acid source, D-sorbitol as carbon source and glycine as gas source. A simple UV curing technique was used to improve the flame retardancy of RPUF . Coated RPUF exhibited a limiting oxygen index value of up to 39.7 % and successfully met UL-94 testing criteria with V-0 rating. In comparison to control RPUF, coated RPUF showed an extended ignition time of 3 s, a remarkable reduction of approximately 60 % in the peak heat release rate, and possessed commendable smoke suppression property. The flame retardant mechanism was analyzed, unveiling the emergence of compact char residue on the surface of coated RPUF after burning, accompanied by the liberation of non-combustible gases. Therefore, these results demonstrated that cost-effective UV-curable flame retardant coating forms protective char layer on the surface of RPUF, providing efficient flame retardancy while preserving its excellent properties.
研究领域:
材料科学
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化学工程
·
环境科学
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产品关联
DOI
高影响因子
Applied Chemistry for Engineering
·
2025
·Vol. 36
·期 1
·36-42
·
IF 0.6
Gyu Won Woo,Eun Kwang Lee
본 연구에서는 스크린 인쇄 기술을 활용하여 유연 기판인 polyimide (PI) 필름에 내부 이온 게이트 유기 전기 화학 트랜지스터(internal gated transistor, IGT)를 제작하였다. 기존의 복잡한 공정 없이 저비용으로 제작하였으며, 유기 전기 화학 트랜지스터(OECT)의 채널로 주로 사용되는 전도성 고분자인 poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS)와 D-소르비톨을 혼합하여 외부 전해질 없이 채널 내에서 자체적으로 이온 (de)doping 메커니즘을 구현하였다. 그 결과, 스크린 인쇄 IGT는 기존 OECT 대비 향상된 전도성과 성능 지표를 나타냈다. D-소르비톨 첨가 후 PEDOT:PSS의 시트 저항 값이 기존 대비 약 1/2로 감소하여 전도성이 향상되었고, 표면 결정성 또한 개선되었다. 전기적 성능 평가에서 IGT는 OECT 대비 출력 곡선 특성(VGS = 1.6 V)에서 약 4배 증가한 것으로 나타났으며, ION/IOFF 비율은 약 4.3배 높았다. 이동도 계산 결과 OECT는 0.6987 F V-1 s-1 cm-1, IGT는 0.9578 F V-1 s-1 cm-1로 IGT가 높은 값을 보였고, 시간 응답 속도 상수 τ는 τOECT = 0.50 s, τIGT = 0.34 s로 더 빠른 응답 속도를 나타내었다.
The device fabricated in this study was an internal ion-gated organic electrochemical transistors (IGTs) using screen printing technology on a flexible polyimide (PI) film substrate. This fabrication method is a cost-effective and simple method without existing deposition techniques or complicated processes. The conductive polymer, poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS), commonly used as a channel material in organic electrochemical transistors (OECTs), was blended with D-sorbitol to enable a self-ion (de)doping mechanism within the channel, eliminating the requirement for an external electrolyte. The screen-printed IGT exhibited enhanced conductivity and performance compared to conventional OECTs. Analysis of the physical and chemical properties of PEDOT:PSS with D-sorbitol revealed a significant reduction in sheet resistance. The surface analysis further confirmed an enhancement in crystallinity. Electrical performance evaluation involved a comparative study with conventional OECTs. The IGT device demonstrated a 4 times increase in output curve characteristics at VGS = 1.6 V compared to OECTs. Additionally, the ION/IOFF ratio was 4.3 times higher for the IGT. Calculations of µC* to assess device mobility indicated a notable improvement, with values of 0.9578 F V-1 s-1 cm-1 for IGT compared to 0.6987 F V-1 s-1 cm-1 for OECTs. In time constant analysis, τOECT = 0.50 s and τIGT = 0.34 s indicate that IGTs have a faster response time.
研究领域:
材料科学
·
电子工程
·
化学工程
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2014
·
IF 1.552
Xingcui Guo,Xicheng Wang,Jing Guan,Xiufang Chen,Zhangfeng Qin,Xindong Mu,Mo Xian
Ru particles were introduced into the zeolite ZSM-5 (MFI) by either a conventional impregnation method or a one-step template-free process. The resultant materials were characterized by X-ray diffraction, N 2 adsorption-desorption, scanning electron microscopy, transmission electron microscopy, NH 3 and CO 2 temperature-programmed desorption. The results indicated that the Ru species in ZSM-5 catalysts prepared via the latter approach (designated as Ru/ZSM-5-TF) were highly dispersed in the ZSM-5 framework structure and this material exhibited high catalytic performance during the hydrogenation of D-glucose to D-sorbitol. The conversion of D-glucose was as high as 99.6% with D-sorbitol selectivity reaching 99.2%, exceeding the performance of Ru/ZSM-5 catalysts prepared by the conventional impregnation method with microporous or desilicated ZSM-5 supports. More importantly, this catalyst showed high stability against leaching and poisoning and could be reused several times. The extensive dispersion of the Ru species, strong interaction between the Ru species and the ZSM-5, and the suitable surface acidity-basicity balance of the Ru/ZSM-5-TF were all critical factors leading to excellent catalytic behavior and stability.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2025
·
IF 4
Shah Nouman Ali,Shakir Namra,Gul Rizwan M.,Xu Jia-Zhuang,Li Zhong-Ming
Ultra-high molecular weight polyethylene (UHMWPE) is a versatile polymer with various industrial applications, particularly in orthopedic implants and structural materials. However, its susceptibility to oxidation limits its utility in demanding environments. This study investigates the potential of d -sorbitol (DS), a natural polyol, in enhancing the oxidation stability and crosslink density of UHMWPE when stabilized with tea polyphenols. Tea polyphenols, such as epigallocatechin gallate (EGCG), have been previously evaluated as a promising candidate to stabilize UHMWPE against oxidation without affecting its crosslink density. However, the higher content of EGCG has adverse effect on its mechanical properties. It is hypothesized that addition of DS to EGCG can improve the oxidation and crosslink density of UHMWPE blends. For this purpose, EGCG/DS was blended with UHMWPE at low antioxidant concentrations (≤ 1 wt%), and its comprehensive performance was evaluated. Results demonstrate that the incorporation of d -sorbitol effectively retards oxidation-induced degradation in tea polyphenol-stabilized UHMWPE. The presence of d -sorbitol enhances the crosslink density within the polymer matrix, thereby improving its resistance to oxidative stress. Furthermore, the study elucidates the underlying mechanisms through which DS interacts with EGCG and UHMWPE, elucidating the formation of stable complexes that mitigate oxidative damage. The in vitro biocompatibility of the blends was also very promising for use in artificial joints.
研究领域:
高分子材料
·
生物医学工程
·
抗氧化研究
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产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 2
·304-310
·
IF 1.307
Wang Dong,Li Zhenwei,Zhang Qian,Liu Jie,Yang Yu,Han Jishu,Wang Lei
Silicon(Si) with high theoretical capacity has attracted tremendous attention as the next-generation anode material for Li-ion batteries, but the huge expansion during cycling restricts its practical application. Designing a low-cost, accessible robust network binder is a facile and effective approach to suppress the volume change effect and achieve the commercial application of Si anodes. Different previous studies focused on the network binder macromolecule main chain, this manuscript pays attention to the study of small-molecule cross-linker. Herein, cross-linked network binders using alginate acid and two kinds of cross-linkers, i.e., D -sorbitol and isosorbide(Alg-DS and Alg-IS binders) are synthesized. It was found that not only the chemical structure of the cross-linker but also the physicochemical property, such as melting point affect greatly the mechanical properties of the network binder. As a result, the Si anode with an Alg-DS binder dried below the melting point of DS shows the best cycling stability with a high capacity of 2249.8 mA·h/g and a retention rate as high as 95.9% after 100 cycles. This study gives a new view to design robust network binders for stable Si anodes.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Nouman Ali Shah,Rui Hong,Xue Yang,Shi-Shu Huang,Rizwan M. Gul,Yuwei Liu,Lingli Li,Jia-Zhuang Xu,Ka Li,Zhong-Ming Li
Maintaining reliability remains a great challenge for ultrahigh molecular weight polyethylene (UHMWPE) bearings due to oxidation in biological environments. This work aimed at inspecting the efficacy of the hybrid antioxidant strategy in stabilizing crosslinked UHMWPE under an in vitro clinically relevant accelerated aging condition. The hybrid antioxidant system was composed of vitamin E (VE) and D-sorbitol (DS) as primary and secondary antioxidants, respectively. The already established in vitro clinically relevant accelerated aging was performed via squalene absorption and subsequent thermal oxidation treatment. Compared to the use of VE alone, the combination of VE and DS significantly protracted the oxidation induction time of UHMWPE with no apparent oxidation after aging, showing a notable synergistic effect on the oxidative stability of UHMWPE. The crosslink density was higher for VE/DS/UHMWPE than VE/UHMWPE at each aging period. It revealed that the hybrid antioxidant strategy settled the longstanding contradiction between oxidation stability and crosslinking of UHMWPE. Attributed to improved oxidation stability, there was a positive reversal in the tensile property between VE/DS/UHMWPE and VE/UHMWPE after aging, where comparable ultimate tensile strength and higher elongation at break were observed. These findings underline the high potential of the hybrid antioxidant strategy for developing artificial joint materials with desired ability to resist oxidation and balanced performance.
研究领域:
生物医学工程
·
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）