COLLOID AND POLYMER SCIENCE
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2025
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IF 2.3
Zhou Huibin,Wang Hairui,Zhang Hongyu,Chen Liheng,Han Qingzhen,Zong Chengzhong
Polyurethanes are widely used in many fields, and with the expansion of market demand, the improvement of their comprehensive performance through modification techniques has become a research priority. In this paper, modified polyurethane (MPU) was synthesized by reacting terminal hydroxyl polyurethane prepolymer (Pre-PU) with maleic anhydride (MA), and the effects of the introduction of MA as well as the different additions on the properties of MPU were investigated. The structure of MPU was determined using Fourier transform infrared spectroscopy, and the water contact angle and water absorption tests showed that the hydrophilicity of MPU was significantly enhanced, and from the solvent resistance test, it was known that MPU was easy to decompose in acetone, and from the results of the differential scanning calorimeter and the heat loss analyzer, it was known that modified polyurethanes were tunable in terms of their thermal properties by adjusting the amount of MA added. The results of the study offer the possibility of expanding the application areas of polyurethane and its application in special environments.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2011
·Vol. 121
·期 1
·352-358
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IF 1.24
Yang Yu,Tingli Lu,Wen Zhao,Weiguang Sun,Tao Chen
A series of biodegradable PEG-containing polyanhydrides composed of sebacic acid, 1, 6-bis( p -carboxyphenoxy) hexane, and poly (ethylene glycol) (PEG) were used as matrix material for BSA-loaded microspheres. The effects of polymer composition on the microsphere size, entrapment efficiency, in vitro degradation, and in vitro protein release were studied. Microspheres in the size range of 0.8–10 μm were fabricated via a modified double emulsion method and were characterized using scanning electron microscopy. As the content or the molecular weight of PEG was increased in the copolymer, a proportional increase was found in the particle size and the efficiency of BSA entrapment. The in vitro degradation rate of particles could be controlled by varying the polymer composition, increasing as the PEG proportion increased. In vitro release studies of BSA from polyanhydride microspheres revealed that the increased amounts of PEG within microspheres could accelerate the release rate of protein. These studies indicate that the PEG-containing polyanhydrides hold potential for protein delivery applications. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
研究领域:
生物材料
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药物递送
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DOI
高影响因子
CHEMICAL PAPERS
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2022
·Vol. 76
·期 4
·2145-2152
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IF 2.146
Zhu Xingji,Kou Xinhui
We disclose a metal-free catalyst system of organic bases/protic acids for effective fully alternating copolymerization of cyclohexene oxide and phthalic anhydride. A series of commercial organic bases and protic acids were employed as binary catalysts, and the effects of different kinds and ratios of organic bases and protic acids were performed to find optimal conditions for achieving the highest catalytic performance. And our results indicated that DMAP/DPP showed higher activity (TOF = 574 h −1 at 140 °C) and perfectly alternating selectivity (ester > 99%), producing polymers with narrow polydispersity (Ð = 1.08 ~ 1.22). Moreover, analysis of the resultant polymers was confirmed by GPC, NMR spectra and MALDI-TOF MS techniques which revealed that P(PA- alt -CHO) polyester with well-defined alternating structure without formation of polyether and DMAP can act as an initiator in DMAP/DPP catalyst system, resulting more effective ring-opening alternating copolymerization. However, trace amount of phthalic acid as an impurity in the system also acted as a bifunctional initiator influencing the molecular weight of the polymer. In addition, the DMAP/DPP catalytic system remained stable at high temperature and the development of this simple catalytic process provided a new chance to exploit in organocatalyzed polymerization.
研究领域:
高分子化学
·
有机催化
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DOI
高影响因子
FLUID PHASE EQUILIBRIA
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2014
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IF 2.241
Xiang Liu,Yonghong Hu,Mengmeng Liang,Yonglan Li,Jingjing Yin,Wenge Yang
Data on corresponding solid–liquid equilibrium of maleic anhydride in different organic solvents are essential for industrial design and further theoretical studies. In this study, the solubilities of maleic anhydride were measured in DMF, methanol, acetic acid, acetonitrile , acetone, ethyl acetate , 2-propanol and n-butyl alcohol with the temperature range of 278.15–323.15 K by the analytical stirred-flask method under atmospheric pressure. The experiment results indicated that the solubility of maleic anhydride was highest in DMF and followed by methanol, acetic acid, acetonitrile, acetone, ethyl acetate, 2-propanol and n-butyl alcohol. For the temperature range investigated, the solubilities of maleic anhydride in the organic solvents increased with increasing temperature. Results of these measurements were well-correlated with the modified Apelblat equation, the Buchowski–Ksiazaczak λh equation and the van’t Hoff equation. The calculated solubilities showed good agreement with the experimental data. The modified Apelblat equation was found to regress the solubility data is higher accuracy than the Buchowski–Ksiazaczak λh equation. The experimental data and model parameters would be useful for optimizing the process of purification of maleic anhydride in industry.
研究领域:
化学工程
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物理化学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2024
·
IF 8.5
Shen Long,Meng-Jie Yu,Ran Feng,Han Tao,Bao Zhang
In this study, a novel dextrin-based micelle (OSAD-SH), dual-modified with octenyl succinic anhydride (OSA) and cysteamine, has been developed to address the acid instability issues of micelles modified only by OSA and designed for curcumin delivery. The chemical structure of OSAD-SH was characterized and the physical properties of the micelles were evaluated. Results displayed that OSAD-SH micelles exhibit strong self-assembly properties, appearing as spheres with diameters ranging from 92.41 to 194.20 nm. Blank micelles with good dilution resistance, acid, thermal, and ionic strength stability. The curcumin encapsulated by the micelles is in an amorphous state. In vitro release experiments demonstrated that curcumin released from OSAD-SH micelles exhibits intestinal targeting. The Ritger-Peppas model effectively predicted the release behavior of curcumin, indicating that the release mechanism follows super case-II transport. The OSAD-SH micelle could be a promising nanocarrier for improving the physicochemical properties of curcumin in food fields.
研究领域:
药学
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纳米技术
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药物递送系统
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食品科学
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产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Lei Mao,Yaxin Chen,Ruifang Zhang,Chun Yang,Yanhong Zhou,Guangya Zhang
The utilization of carbonic anhydrases (CAs) for CO2 capture aligns with the principles of environmental sustainability. However, there is an urgent need to minimize the cost of CA purification while improving their performance in harsh environments. A novel strategy was proposed to solve the above problems by employing the ferritin-tagged CA variant (DvCA8.0-F). The purification is achieved by low-speed centrifugation, yielding 92% activity recovery and 95% purity. After 14 weeks of incubation in a 50% MDEA solution at 50 °C, DvCA8.0-F maintained activity nearly equivalent to the initial activity, which showed remarkable stability compared to the free ones. Encouragingly, DvCA8.0-F had a yield of up to 800 mg/L, allowing for cost-effective CA-assisted CO2 absorption and desorption in MDEA solutions. The results show that DvCA8.0-F reduced the absorption time from 70 to 50 min at 40 °C and desorption time from 40 to 25 min at 96 °C in 25%MDEA+1%[N1111][Gly] solution with a final CO2 load and a stripped amount of CO2 at the same time. DvCA8.0-F exhibits the maximum reaction rate at 96 °C; the CO2 regeneration efficiency improved from 60% at 87 °C to 72%. When the concentration of DvCA8.0-F was 1.5 g/L, the absorption rate of CO2 reached about 90% of that of the 25% MEA solution. These results demonstrate the simplicity of preparation and the outstanding properties of DvCA8.0-F, which paves a feasible way for CA-assisted CO2 capture. This exciting strategy may also have excellent potential in enzymes for innovative chemical synthesis to achieve the sustainable development of green chemistry.
研究领域:
生物化学
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环境科学
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绿色化学
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产品关联
DOI
高影响因子
Journal of CO2 Utilization
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2020
·
IF 5.993
Mine Du,Han Chen,Jiexu Ye,Shihan Zhang,Jianmeng Chen,Lidong Wang
Carbonic anhydrase (CA) enzyme-based absorption process is under development for CO 2 capture. How to maintain the activity and stability of CA enzyme is the important issue related to this emerging process. The immobilization technologies are regarding as the promising method to stabilize CA in harsh environments. This work encapsulated CA into zeolitic imidazolate framework-8 (ZIF-8) with different particle sizes according to several preparation protocols and investigated their activity and stability. The experimental results revealed that the preliminary crystallization time, enzyme dosing amount, and particle sizes of ZIF-8 had a significant influence on the catalytic performance of immobilized CA. The remaining activity of the CA after immobilization ranged from 52 to 93 % depending on the employed preparation protocol. In addition, the immobilized CA with particle size of ∼400 nm exhibited better activity compared to those with particle sizes of ∼100 nm and 1000 nm. Moreover, with the increase of the preliminary crystallization time, the stability of immobilized CA descended.
研究领域:
环境科学
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生物化学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2013
·
IF 3.479
Zhu Xiong,Chao Li,Songqi Ma,Jianxian Feng,Yong Yang,Ruoyu Zhang,Jin Zhu
Bio-sourced polymers, polylactide (PLA) and starch, have been melt-blended by lab-scale co-extruder with tung oil anhydride (TOA) as the plasticizer. The ready reaction between the maleic anhydride on TOA and the hydroxyl on starch led TOA molecules to accumulate on starch and increased the compatibility of PLA/starch blends, which was confirmed by FT-IR analyses and SEM. The TOA could change the mechanical properties and physical behaviors of PLA/starch blends. DSC and DMA analysis show that the TOA layer on starch has an effect on the thermal behavior of PLA in the ternary blend. The enrichment of TOA on starch improves the toughness and impact strength of the PLA/starch blends. The adding amount of TOA in PLA/starch blends primarily determined the compatibility and mechanical properties of the resulted ternary blends. The tensile and impact fracture modes of the PLA/starch blend with or without TOA has also been investigated by SEM analysis.
研究领域:
材料科学
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生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
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2015
·
IF 4.074
Wenbo Chai,Xiaoyan Liu,Junchen Zou,Xinying Zhang,Beibei Li,Tiantian Yin
Pomelo peel (PP), as one of the well-known agricultural wastes, is cost-effective and environmentally friendly. Based on PP, two new kinds of oil sorbents were prepared by using acetic anhydride and styrene. The structures of raw pomelo peel (RP), acetic anhydride-treated pomelo peel (AP) and styrene-treated pomelo peel (SP) were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), contact-angle (CA) measurements. The optimum reaction conditions for preparation of AP and SP were also investigated. The resulting products exhibited better oil sorption capacity than that of RP for diesel and lubricating oil, also SP had better oil sorption capacity than AP, while the oil sorption capacities of SP for diesel and lubricating oil reached 18.91 and 26.36 g/g, respectively. Adsorption kinetics was well described by the pseudo-second-order model. The results indicated that AP and SP, especially SP could be used as the substitute for non-biodegradable oil sorption materials.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2017
·
IF 2.726
Qiaoyin Huang,Yang Li,Fuhong Yuan,Liping Xiao,Hongxun Hao,Yongli Wang
In this work, two different polymorphs (form 1 and form 2) of glycolide were successfully prepared and characterized. The solubility of these two polymorphs in ethyl acetate, 1-propanol, ethanol, 2-propanol and 1-butanol at temperatures from 278.15 K to 328.15 K under atmospheric pressure (0.1 MPa) was experimentally measured by using the isothermal gravimetrical method and correlated by the modified Apelblat model and the van’t Hoff equation. For all the selected solvents, the solubility curve of form 1 crossed the solubility curve of form 2 at a transition temperature in the above temperature range. Combining the results of DSC, solubility curves and dissolution data of these two polymorphs, it was confirmed that form 1 and form 2 were enantiotropic. The dissolution thermodynamic properties of glycolide form 1 and form 2 were also calculated.
研究领域:
物理化学
·
药学
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Ming-Xin Song,Li-Jing Xie,Jia-Yao Cheng,Zong-Lin Yi,Ge Song,Xiao-Yang Jia,Jing-Peng Chen,Quan-Gui Guo,Cheng-Meng Chen
Starch, as a typical polysaccharide with natural spherical morphology, is not only a preferred precursor for preparing carbon materials but also a model polymer for investigating thermochemical evolution mechanisms. However, starch usually suffers from severe foaming and low carbon yield during direct pyrolysis. Herein, we report a simple and eco-friendly dry strategy, by maleic anhydride initiating the esterification of starch, to design carbon microspheres against the starch foaming. Moreover, the influence of ester grafting on the pyrolytic behavior of starch is also focused. The formation of ester groups in precursor guarantees the structural stability of starch-based intermediate because it can promote the accumulation of unsaturated species and accelerate the water elimination during pyrolysis. Meanwhile, the esterification and dehydration reactions greatly deplete the primary hydroxyl groups in the starch molecules and thus the rapid levoglucosan release is inhibited, which well keeps the spherical morphology of starch and ensures the high carbon yield. In further exploration as anode materials for Lithium-ion batteries, the obtained carbon microspheres exhibit good cyclability and rate performance with a reversible capacity of 444 mAh g −1 at 50 mA g −1 . This work provides theoretical fundamentals for the controllable thermal transformation of biomass towards wide applications.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Xiaojie Shao,Lijuan Su,Jiaojiao Zhang,Zishang Tian,Ning Zhang,Yingxiong Wang,Hongliang Wang,Xiaojing Cui,Xianglin Hou,Tiansheng Deng
The production of chemicals such as phthalic anhydride (PA) from renewable biomass is of crucial significance for sustainable social development. Herein, we demonstrate that a 99.0 mol % yield of PA can be achieved from a Diels–Alder adduct of furan and maleic anhydride on an acid resin catalyst. The active sites on the catalyst were produced by pretreating the resin with acetic anhydride. The excellent performance of the resin catalyst is attributed to its surface enrichment effect on the reactant and good ability to suppress the side reactions. Moreover, the catalyst deactivation mechanism was clarified to be the destruction of the resin skeleton during the reaction. These results will provide a practical route for the future industrial production of PA from renewable biomass.
研究领域:
化学工程
·
绿色化学
·
催化
·
可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）