INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Kairong Wu,Hao Zhang,Xinjiang Lou,Xiaodan Wu,Ying Wang,Kuangyu Zhao,Xin Du,Xiufang Xia
The structure, physicochemical and anti-freeze properties of natural deep eutectic solvent (NADES) composed of inulin and L-proline (molar ratio of 1:11) were investigated. Proton nuclear magnetic resonance ( 1 H NMR), Fourier infrared spectroscopy (FTIR), and Raman spectroscopy revealed extensive hydrogen bonding in the pure NADES system, and the addition of water weakens the hydrogen bonding interactions between the components. The smaller transverse relaxation time ( T 2 ) represents the stronger hydrogen bond strength, and NADES+40 % H 2 O exhibited a large T 2 (71.68 ms). When 10 % water was added, the viscosity decreased from 3620 mPa·s to 1777 mPa·s, but the conductivity increased to approximately twice the original value. Furthermore, adding 10 % water lowered the glass transition temperature (T g ) of NADES by 5.6 °C. NADES+10 % H 2 O exhibited favorable thermal stability and freezing resistance, as evidenced by the fact that approximately 82.61 % of the ice crystals area <200 μm 2 after 30 min of crystallization . The changes in the structure, physicochemical, and anti-freezing properties of water-tailored NADES are expected to enable the design of novel antifreeze agents.
研究领域:
食品科学
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物理化学
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DOI
PubMed
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Zicheng Yuan,Xiaoqin Zhang,Fei Liu,Xianliang Jiang,Hao Wang,Jin Zhu,Jinggang Wang
High glass transition temperature polymers are extensively used in many fields such as packaging, electronic products, and automobiles. However, most of them are expensive as synthesized in polar aprotic solvent with low solid percent. The task of effectively synthesizing high glass transition temperature polymers faces at least three important challenges: the need for a solvent-free process to reduce cost and pollution, the requirement for a thermoplastic process with a high glass transition temperature above 150 °C, and the use of monomers derived from renewable resources. Traditional polyesters can be prepared via melt polycondensation, but achieving a glass transition temperature above 130 °C while maintaining good mechanical properties remains challenging. In this work, we developed a strategy to synthesize a new high glass transition temperature polyesters by employing rigid bulky diol of 9,9-bis [6-(2-hydroxyethoxy)naphthyl]fluorene (BNEF) and bio-based 2,5-furandicarboxylic acid (FDCA) which derived from fructose or furfural, as the main monomers. The new copolyesters exhibit a glass transition temperature of up to 164.2 °C, a number-average molecular weight of 24,600 g/mol, along with tensile modulus and strength values of 3030 MPa and 134 MPa, respectively. Furthermore, the copolyesters exhibit excellent transparency properties of 88.4 % by cutoff at 700 nm and well solvent resistance, which could serve as new low-cost, high-performance engineering plastics with ultra-high glass transition temperature and transparency.
研究领域:
材料科学
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聚合物化学
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·Vol. 333
·期 5
·2389-2402
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IF 1.5
Mao Xueli,Xu Hechao,Liao Xin,Bu Fankang,Tang Jinrong,Yi Facheng
This study achieves the successful immobilization of simulated alpha- and beta-emitting radionuclides (Nd 3+ and Sr 2+ , respectively) by incorporating them into a glass matrix through Nd 2 O 3 /SrSO 4 (Nd/Sr). Varying mixture concentrations (5–30 wt% with mass ratios Nd:Sr varied from 10:1 to 1:10) in simulated radioactive soils were subjected to microwave sintering at 1500 °C for 0.5 h. Comprehensive assessments, including X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, scanning electron microscopy (SEM), and energy dispersive X-ray spectrometry (EDS), confirm the vitrification process’s efficacy. The vitrified sample exhibits an amorphous structure, smooth surface, and homogeneously distributed elements, highlighting microwave sintering as a promising method for the effective disposal of radioactive-contaminated soil. Graphical abstract
研究领域:
环境科学
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核废物处理
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材料科学
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2018
·Vol. 319
·期 1
·115-121
·
IF 1.181
Chen Shunzhang,Shu Xiaoyan,Luo Fen,Dong Hao,Xu Chen,Li Bingsheng,Shao Dadong,Lu Xirui
To efficiently inhibit the diffusion of radioactive nuclides in soil that were left by nuclear emergency accidents, microwave sintering technology was used in this work to vitrify the simulated strontium contaminated soil. Four kinds of simulated strontium-contaminated soil could be successfully vitrified almost completely within 30 min without any additional components. Sr 2+ cations are immobilized into aluminosilicate glass network structure. In addition, the solubility of SrSO 4 in different soil is related to the element contents of aluminum and silicon. This work reveals a demonstration that beta-radioactive contaminated soil could be treated by microwave vitrifying.
研究领域:
环境科学
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核技术
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 17
·e56781
·
IF 2.8
Yanru Chen,Linbo Wu
2,2,4,4-Tetramethyl-1,3-cyclobutanediol (CBDO) based copolyesters like poly(cyclohexane dimethylene-co-2,2,4,4-tetramethyl cyclobutylene terephthalate) (PCcBT) has high transparency, heat-resistance and safety and has been commercialized to replace bisphenol A polycarbonate in food contact applications. However, its synthesis and processing suffer from CBDO sublimation, composition deviation and relatively poor thermal stability. In order to obtain transparent heat-resistant CBDO-based copolyesters with improved synthesis robustness and thermal stability, poly(ethylene co-tetramethyl cyclobutene terephthalate (PEcBT)) copolyesters were synthesized from ethylene glycol (EG), CBDO, and terephthalic acid (TPA) via direct esterification route, and the structure–property was studied. It is found that the presence of EG effectively inhibited the sublimation of CBDO, and the resulting PEcBT copolyesters had reasonably good thermal stability so that the melt polycondensation proceeded smoothly without serious foaming. PEcBT copolyesters with intrinsic viscosity ([η]) over 0.60 dL/g were successfully synthesized at copolymer composition ( ϕ cBT ) up to 67 mol%. A quantitative relationship between T g and its influence factors is established. The copolyesters with ϕ cBT of 48–62 mol% displayed T g of 126°C–144°C, flexible tensile behavior, satisfactory tensile properties and reasonably good impact performance. Ternary PEPecBT copolyesters were also synthesized using 1,5-pentanediol as another diol comonomer to improve toughness of the materials.
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
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2021
·
IF 2.936
Jing Wang,Chenchen Niu,Kaiwen Hu,Xiujian Zhao,Kai Xu
Rhenium (Re), a non-radioactive surrogate for technetium (Tc), was incorporated into the lattice of SnO 2 by reductive co-precipitation process at room temperature, and Re volatility from Re(SnO 2 ) under different conditions (in air and N 2 and with glass frit) at elevated temperatures was carefully investigated. Re began to evaporate from Re(SnO 2 ) both in air and N 2 at 400 °C, while Re exhibited a faster volatilization in air than in N 2 , as all Re was gone at 1200 °C in air, but ∼40% of Re still remained at 1200 °C in N 2 . Additionally, Re did not volatilize from Re(SnO 2 )-containing glass frit until 800 °C and only ∼15% of Re volatilized at 1200 °C, suggesting the loss of Re decreased by ∼30% points through incorporation of Re into SnO 2 before vitrification. The analysis of Re valence transition revealed that the reduced Re 4+ was easily oxidized to volatile Re 7+ in air, but in N 2 , Re 4+ disproportionated to form Re 7+ and the lower valence states of Re at temperatures from 600 °C to 1000 °C. In Re(SnO 2 )-containing glass frit, the formation of NaReO 4 during vitrification inhibited Re 7+ volatilization before 800 °C, while the presence of Re 4+ in the glass melt enhanced Re retention at temperature above 800 °C.
研究领域:
材料科学
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核化学
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环境科学
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DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 24
·4336
·
IF 4.329
Jolanta Tomaszewska,Tomasz Sterzyński,Aneta Woźniak-Braszak,Michał Banaszak
This review addresses the impact of different nanoadditives on the glass transition temperature (Tg) of polyvinyl chloride (PVC), which is a widely used industrial polymer. The relatively highTglimits its temperature-dependent applications. The objective of the review is to present the state-of-the-art knowledge on the influence of nanofillers of various origins and dimensions on theTgof the PVC. TheTgvariations induced by added nanofillers can be probed mostly by such experimental techniques as thermomechanical analysis (TMA), dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and dielectric thermal analysis (DETA). The increase inTgis commonly associated with the use of mineral and carbonaceous nanofillers. In this case, a rise in the concentration of nanoadditives leads to an increase in theTgdue to a restraint of the PVC macromolecular chain’s mobility. The lowering ofTgmay be attributed to the well-known plasticizing effect, which is a consequence of the incorporation of oligomeric silsesquioxanes to the polymeric matrix. It has been well established that the variation in theTgvalue depends also on the chemical modification of nanofillers and their incorporation into the PVC matrix. This review may be an inspiration for further investigation of nanofillers’ effect on the PVC glass transition temperature.Keywords:nanocomposites;thermal analysis;thermal properties;PVC glass transition
研究领域:
材料科学
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高分子化学
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DOI
PubMed
高影响因子
Animals
·
2025
·Vol. 15
·期 5
·661
·
IF 2.7
Yuan Feng,Mengyuan Zhang,Wenqing Yuan,Dan Zhao,Zhixuan Luo,Zihui Tang,Yongheng Wang,Ming Cang
Simple SummaryWhen precious species are about to die out or excellent strains need to be preserved, we want to use technology to preserve their gametes so that they can be used directly when needed in the future. The damage caused by vitrification of frozen oocytes needs to be addressed. In this study, the damage to oocytes caused by freezing was minimized by natural chemicals. The results showed that imperatorin reduced the level of oxidative stress and increased mitochondrial activity in mouse oocytes after vitrification freezing. In conclusion, the addition of imperatorin to vitrification freezing solution improved the activity of frozen mouse oocytes and provided new perspectives for the improvement of vitrification freezing technology.Imperatorin (IMP) is a naturally occurring furanocoumarin with beneficial biological activities such as anticancer, antioxidant, and neuromodulatory properties. Currently, the protective effects and mechanisms of IMP on oxidative stress experienced by mouse oocytes after vitrification–thawing remain unclear. To investigate the influence of IMP on mouse oocyte development after vitrification–thawing, we added different concentrations of IMP to the vitrification and thawing media. Results indicated that the addition of 40 μM IMP enhanced post-thaw fertilization capacity, reduced intracellular reactive oxygen species (ROS) levels, and increased intracellular glutathione (GSH) levels. IMP also improved mitochondrial health by alleviating the decrease in mitochondrial membrane potential (MMP) and enhancing mitochondrial distribution. IMP reduced intracellular ROS levels by affecting the transcription of the antioxidant genesSOD2,NRF2, andHO-1and enhancing SOD activity. It also elevated GSH levels viaGPX1, improved mitochondrial function, and decreased early apoptosis throughBcl-2.In conclusion, IMP enhanced ovum health through the alleviation of oxidative stress. The present study provides useful information for further exploration of the molecular mechanisms of IMP in female reproductive cells and offers a novel approach for the improvement of vitrification technology.
研究领域:
生殖生物学
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分子生物学
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生物化学
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DOI
PubMed
高影响因子
HIGH PERFORMANCE POLYMERS
·
2025
·
IF 1.6
Zeyuan Liu,Qian Liu,Peiqi Xu,Zhaoqi Wang,Danhui Wang,Xigao Jian,Shouhai Zhang
Novel polyarylates containing phthalazinone moieties (PAR-PH) were synthesized and characterized by co-solvent interfacial polymerization based on 4-(4′-hydroxyphenyl)-2,3-phthalazin-1-one (DHPZ) and isophthaloyl chloride (IPC). Effects of inorganic bases, monomer concentration, phase transfer catalysts and co-solvents on the interfacial polymerization reaction were investigated. When the organic phase solvent was cyclohexane with 3% butanone and 18-crown-6 was the phase transfer catalyst, PAR-PH achieved a maximum intrinsic viscosity (ηint) up to 0.52 dL/g. For some organic phase solvents of alkanes and chlorinated hydrocarbons, the addition of co-solvents increased the ηint of the polymer. PAR-PH exhibit excellent thermal resistance due to the introduction of rigid twisted phthalazinone moieties into the polymer main chains, with glass transition temperature (Tg) of 275°C. The 5% thermal weight loss temperature of PAR-PH was 463°C in N2 and residual mass ratios at 800°C of 52.0%, demonstrating excellent thermal stability.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 37
·14928-14937
·
IF 3.069
Jing Yi,Shouhai Li,Jianling Xia,Mei Li,Haiyang Ding,Lina Xu,Xiaohua Yang
Novel, dual-crosslinking, reactive monomers of MAHHAGMA and HHAGE were synthesized using hemp oil (HO), and their successful syntheses were confirmed by FTIR and 1H-NMR analyses. Then, three copolymerized materials were obtained: MAHHAGMA/single-crosslinking, MAHHAGMA/dual-crosslinking, and HHAGE/dual-crosslinking systems. The properties of three as-prepared materials were tested. The two dual-crosslinking systems had better hardness, crosslinking density, and tensile properties than the single-crosslinking system. The HHAGE/dual-crosslinking copolymer, a combination of polyurethane and polyoxazolidinone systems, had superior tensile strength (30.17 MPa), the greatest elongation at break (31.42%), and the highest glass transition temperature (78.21 °C). The dual-crosslinking copolymer of MAHHAGMA, a combination of polymerized epoxy and polymerized vinyl ester systems, had the highest crosslinking density (381.24 mol m−3) and the highest initial decomposition temperature (365.5 °C). Thus, the present study offers a novel preparation method of dual-crosslinking copolymerized biomaterials based on a vegetable oil.
研究领域:
材料科学
·
生物化学
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产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
·
2019
·Vol. 68
·期 10
·1729-1738
·
IF 2.433
Xinghua Guan,Heran Nie,Honghua Wang,Jiyong Zhao,Zhipeng Wang,Guangyuan Zhou,Qiang Gu
A series of copolyarylates (PP0–PP100) containing phthalide groups was synthesized via interfacial polymerization from a mixture of phenolphthalein (PP) and bisphenol A with molar equivalent of terephthalyl chloride. Incorporating PP into the polymer chain improved the solubility of the polyarylates in common organic solvents. The glass transition temperature (191–314 °C), residual weight percentage, Young's modulus (1.7–2.8 GPa), solubility and complex melt viscosity of the copolyarylates increased with increasing PP units in the copolymerization. By contrast, crystallinity and elongation at break (14.1 to 11.2%) of the copolyarylates decreased with increasing PP units in the polymer backbone. When the PP content increased over 30 mol% (PP30), the copolyarylates became amorphous polymers. When the PP content was below 30 mol%, the copolyarylates exhibited good melt processability. With regards to its solubility, thermal stability, mechanical properties and melt processability, PP30 may be considered as a promising candidate in the field of processable high-performance engineering plastics. © 2019 Society of Chemical Industry
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
HIGH PERFORMANCE POLYMERS
·
2018
·
IF 1.047
Li Zhang,Xian Wu,Shanyou Liu,Jinwu Peng,Baijun Liu
Some multi-ether linked polyimides (PIs) derived from two diamine monomers containing various amount of cyano groups are synthesized by a typical two-step polymerization. Meanwhile, the PIs with similar chemical structure but without cyano groups are prepared as counterparts for comparison purposes. The obtained PIs exhibit low glass transition temperature values of 211–258°C, which are associated with their multi-ether chemical structure. Furthermore, these PIs have high thermal stability, and the temperatures at 10% weight loss are in the range of 524–616°C under nitrogen atmosphere. It is found that the introduction of cyano groups would have a great influence on the properties of the PIs. The tensile strength and Young’s modulus of one cyano-containing PI reach 121 MPa and 1.4 GPa, respectively, which are much higher than those cyano-free ones. In addition, the cyano-containing PIs exhibit different behaviors of dielectricity and solubility in comparison with the corresponding cyano-free counterparts.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）