JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 31
·期 1
·1-12
·
IF 4.705
Yuan Yuka,Fu Zhe,Liu Yudong,Liu Kai,Hua Jing
Poly (L-lactic acid) (PLLA) suggests attractive biomedical applications in drug releasing system, surgical suture, bone fixing and tissue repairing due to its degradable and biocompatible benefits. However, currently developed catalysts with high toxicity and currently reported PLLA with uncontrollable crystallinity are detrimental for the environmental protection and human health. Herein, we proposed a novel and effective approach to synthesizing PLLA using environmentally-friendly bio-based phenol-substituted triisobutylaluminum as the catalyst. The effects of the chemical structures of various bio-based phenols on the polymerization activity and stereoregularity of PLLA were explored in detail. The increased steric hindrance of bio-based phenols was beneficial for the polymerization activity of PLLA. The resultant PLLA exhibited an ultrahigh monomer conversion efficiency up to 98.32% among the highest value of reported PLLA. Moreover, the PLLA also demonstrated quick polymerization rate (< 5 h) and low polymerization temperature (< 100 °C), with controllable polymer crystallinity (36 ~ 46%) and number average molecular weight (8400 ~ 16,000 g mol −1 ). Consequently, the strategy and results collectively represent a significant advance toward the preparation of high-performance degradable and biocompatible PLLA.
研究领域:
材料科学
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生物医学工程
·
高分子化学
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 3
·751-763
·
IF 2.2
Ma Yaqian,Lei Tongda,Yang Xue,Zhang Li,Wang Yongheng,Liu Jianhua,Li Xipeng,Yang Qingqi,He Sen,Fan Jie
Electrical stimulation with conductive biomaterials shows great promising to promote skin wound healing in practical application. In this study, polypyrrole@keratin nanofiber membrane (PPy@KNM) with good conductivity was prepared using electrospinning technology and chemical in situ polymerization of pyrrole monomers. Morphological, chemical, X-ray and surface analyses suggested that PPy was deposited on the keratin nanofiber membrane (KNM). The PPy@KNM with the highest conductivity and the largest tensile strength was prepared with an oxidant concentration of 0.6 M and a dopant concentration of 0.5 M of the p-toluenesulfonic acid (p-TSA). In vitro cell culture experiments revealed that the conductive PPy@KNM performed good biocompatibility and no cytotoxicity. Electrical stimulation via the PPy@KNM can reasonably accelerate cell growth and cell proliferation with an optimal current intensity of 80 μA and a stimulation time of 5 min/d. The research outcomes demonstrated that PPy@KNM is suitable to be applied as a functional biomedical material to promote wound healing.
研究领域:
生物医学工程
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材料科学
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组织工程
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 21
·期 2
·761-771
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IF 2.3
Gou Rui,Zhang Shihong,He Yi,Li Changhua,Li Hongjie,Sun Dan,Wu Guiyang,Yuan Xi,Chen Wen,Yan Jing
In this study, polyethyleneimine (PEI) was grafted on the surface of graphene oxide (GO) to prepare PEI-GO material. The PEI-GO/EP composite coating was successfully deposited on carbon steel through the cathodic electrophoretic deposition (C-EPD) process. The zeta potential, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), atomic force microscopy (AFM), and thermogravimetric analysis (TGA) methods were used to characterize the GO and PEI-GO materials. The dispersibility of PEI-GO in epoxy electrophoretic paint was studied by TEM and the fracture surface morphology of the coatings was observed by scanning electron microscope (SEM). Electrochemical impedance spectroscopy (EIS) studies evaluated the corrosion resistance of composite coatings. In summary, the impedance modulus of PEI-GO/EP composite coating is two orders of magnitude higher than that of neat epoxy coating, with enhanced anticorrosion performance.
研究领域:
材料科学
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腐蚀与防护
✓ 已验证
DOI
高影响因子
Food and Bioprocess Technology
·
2024
·
IF 5.3
Cui Yan,Zhu Lin,Shang Haitao,Xuan Xiaoting,Lin Xudong
The combined application of high hydrostatic pressure (HHP) and natural antimicrobials is a promising alternative for fish preservation. In this study, microbial qualities, physicochemical properties, taste active, and volatile flavor compounds of large yellow croaker ( Larimichthys crocea ) following combined ε-polylysine (PL) and HHP (PL-HHP) treatment (200, 250, and 300 MPa for 10 min, 20 °C) were investigated and compared to the fresh and PL samples. PL and HHP acted synergistically to give higher inactivation of microorganisms, with the total viable count, Pseudomonas , H 2 S-producing, and coliform bacteria counts even undetectable under the PL-HHP treatment at 300 MPa. PL-HHP treatment had no significant effects on the surface color and lipid oxidation levels. However, the muscle color changed obviously in the PL-HHP samples at ≥ 250 MPa ( p < 0.05), showing a distinct cooked appearance. Samples treated with PL-HHP showed better texture quality, and the maximum resilience and water-holding capacity were observed with the PL-HHP treatment at 200 MPa. The degree of myofibrillar protein denaturation increased by PL-HHP treatment with the elevated pressure. Significant elevations in 5′-nucleotides, free amino acids, and equivalent umami concentration levels were observed in the PL-HHP treated samples ( p < 0.05). Furthermore, PL-HHP treatment exhibited a significant impact on the volatile flavor compounds of fish fillets, with significantly higher concentrations of alcohols, aldehydes, and ketones compared to the fresh and PL samples ( p < 0.05). These findings show that PL-HHP treatment can be an effective alternative for the preservation and processing of large yellow croaker, offering new insights into developing safe aquatic products with enhanced taste and flavor profiles.
研究领域:
食品科学
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海洋生物学
·
微生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2024
·Vol. 39
·期 6
·1337-1347
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IF 1.3
Yue Song,Gong Lunjun,Yang Tonghui,Hu Weida,Liu Xiaopan,Gao Pengzhao,Xiao Hanning
We took Co 0.2 Ni 0.8 -MOF-74 with bimetallic synergistic effect as the basic material, and selected rare earth ions Ho, Gd, and Er with ion radii close to Co and Ni as the research objects for doping. The influence of rare earth ion doping amount and doping type on the eNRR performance of the catalyst was explored. The experimental results show that the ammonia yield rate and Faraday efficiency doped with Co 0.2 Ni 0.8 -MOF-0.5Ho are the highest, reaching 1.28 × 10 −10 mol·s −1 ·cm −2 /39.8%, which is higher than the 1.12 × 10 −10 mol·s −1 ·cm −2 /32.2% of Co 0.2 Ni 0.8 -MOF-74, and is about 14.3%/23.7% higher than that without doping, respectively. And the stability of Co 0.2 Ni 0.8 -MOF-0.5Ho is good(after 80 hours of continuous testing, the current density did not significantly decrease). This is mainly due to doping, which gives Co 0.2 Ni 0.8 -MOF-74 a larger specific surface area and catalytic active sites. The catalyst doped at the same time has more metal cation centers, which increases the electron density of the metal centers and enhances the corresponding eNRR performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Wang Hengjia,Qin Ying,Wu Yu,Qiu Yiwei,Ling Ling,Fang Qie,Wang Canglong,Hu Liuyong,Gu Wenling,Zhu Chengzhou
Hydrogen adsorption and desorption in single-phase catalysts often occur at a single catalytic site based on the traditional hydrogen evolution reaction (HER) pathway, which makes it difficult to break the limitation entailed by the Sabatier principle. Herein, β-Pd hydride metallene (β-PdHene) aerogels are synthesized as advanced HER catalysts. A lattice hydrogen-involved mechanism is reported to separate adsorption and desorption sites, which is thermodynamically favorable compared to the traditional reaction pathway. In situ differential electrochemical mass spectrometry and theoretical calculations reveal that lattice hydrogen as additional active sites directly participate in the HER process. Consequently, β-PdHene aerogels exhibit a low overpotential of only 20 mV at 10 mA cm −2 and remarkable HER stability, which are even comparable to commercial Pt/C. Our work opens an avenue to rationally develop highly active HER catalysts, bypassing the design limitations of catalysts under traditional mechanisms.
研究领域:
材料科学
·
化学工程
·
催化
·
电化学
✓ 已验证
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·Vol. 55
·期 6
·4775-4786
·
IF 2.4
Luo Shuxuan,Ma Xingyue,Wang Wanlin,Zhang Lei,Sun Yongqi
The rapid advancement in stainless steel manufacturing has resulted in the substantial accumulation of stainless steel slags. In those slags, a significant proportion of trivalent chromium is susceptible to oxidation, forming highly toxic hexavalent chromium, particularly under oxidizing atmosphere. Therefore, prior to landfilling or resource recycling, specialized modification of phase transitions is essential. This study is based on the strategy of converting chromium into spinel structure to achieve detoxification. Initially, the thermodynamic calculations were conducted to analyze the formation and transformation behaviors of spinels in an alkaline environment, with particular emphasis on changes in the valence states of manganese. The synthesis and investigation of typical Mg 1− x Mn x Cr 2 O 4 spinels commonly encountered in stainless steel slags treatment process were subsequently conducted. Through various characterization techniques and leaching tests, it was found that the stability of Mn 2+ incorporated MgCr 2 O 4 was diminished. However, with an increase in MnO content from 5 to 20 pct (in mole), the stability of Mg 1− x Mn x Cr 2 O 4 spinels showed an upward trend, though remaining lower than that of pure MgCr 2 O 4 . The subsequent introduction of CaO for high-temperature calcination revealed that the disruption of tetrahedral sites in the spinels primarily originates from Mn 2+ , whereas Mg 2+ exhibited a greater stability in occupying tetrahedral sites. A comprehensive understanding of the properties of Mg 1− x Mn x Cr 2 O 4 spinels could contribute to the target modification and application of stainless steel slags.
研究领域:
材料科学
·
环境工程
·
化学工程
·
冶金学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-11
·
IF 3.8
Zheng Hailing,Yang Ruling,Guo Jianbo,Xie Zhenbin,Liu Jingxuan,Yang Hailiang,Jia Liling,Yu Jian,Cai Qiutong,Tang Fei,Zhou Yang
Silk was the driving force behind the opening of the Silk Road, positioning this material as a global commodity that greatly influenced the progress of human civilization. Due to the natural protein properties of silk, the internal structure and external characteristics of silk cultural relics are irreversibly destroyed during the process of burial or when passed down through the generations until the production information and material components completely disappear, making it difficult to obtain direct archaeological evidence for pinpointing the origin of silk. The sacrificial pits at the Sanxingdui archaeologcal site, located in Guanghan, Sichuan, China, have been found with layers of ash above the layers of artifacts and some bronzes with fabric traces. Among the artifacts, one grid-like ware artifact first appeared in the Bronze Age in China. The two sides of the grid-like ware were grid-like ovals made of bronze material, and inside, there was an oval-shaped complete piece of jade with a bent back. Fabric traces were found on both the jade and bronze surfaces. In order to determine the specific function of fabric at this site, the developed silk fibroin immunoaffinity column (IAC) enrichment technique combined with enzyme-linked immunosorbent assay (ELISA), morphology observation and proteomics were used to identify mineralized fabric material and fabric residues in the ash layer. Silk residues were successfully detected, which confirmed the early use of silk as a material carrier to communicate between Heaven and Earth and provided archaeological evidence for the cultural origins of silk.
研究领域:
考古学
·
材料科学
·
文化遗产研究
·
蛋白质组学
✓ 已验证
DOI
PubMed
高影响因子
POLYMER JOURNAL
·
2018
·Vol. 50
·期 7
·485-493
·
IF 2.17
Lan Jun,Ni Xiuquan,Zhao Chuanzhuang,Liu Qiao,Chen Chongyi
In this work, a versatile and simple strategy for building self-healing hydrogels with tunable mechanical properties and shape memory behavior is reported. A commercially available small molecule with three amino groups, diethylenetriamine (DETA), is applied to crosslink poly (acrylic acid) (PAAc) chains via ionic bonding, and the complexes of the PAAc chains with DETA form hydrophobic microdomains in the hydrogel network. The cooperation of ionic bonding and hydrophobic interactions drastically improves the mechanical properties, which can be modulated by adjusting the molar ratio of PAAc to DETA. Due to the physical interaction of the crosslinks, the hydrogels can self-heal rapidly in ambient conditions. The thermal responsiveness of the physical microdomain crosslinks endow the hydrogels with shape memory behavior. It is hoped that this novel strategy will provide new opportunities for the design of high-strength hydrogels with variable functionalities for a wide range of applications, such as artificial muscle and skin.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Advanced Fiber Materials
·
2023
·Vol. 6
·期 2
·367-386
·
IF 16.1
He Guifang,Ning Fanggang,Liu Xiang,Meng Yaxin,Lei Zhiwei,Ma Xianda,Tian Mingwei,Liu Xuqing,Zhang Xiansheng,Zhang Xueji,Qu Lijun
High-performance wearable electronics are highly desirable for the development of body warming and human health monitoring devices. In the present study, high electrically conductive and photothermal cotton yarns (CYs) with long-term stability were prepared as wearable electronics. The process contains back-to-back decoration of the fiber surface by Ti 3 C 2 T x (MXene) nanosheets, and the poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS) composite, to form a core–shell structure (MP@CY). The addition of a small amount of PEDOT: PSS plays a dual role of protecting the MXene from oxidation and increasing the electrical conductivity. The resulting yarn exhibits excellent electrical conductivity (21.8 Ω cm −1 ), rapid electrothermal response, and superb photothermal conversion capability, supporting its application as an optical/electrical dual-drive heater. A three-dimensional (3D) honeycomb-like textile wearable heater based on MP@CY as weft yarn demonstrates outstanding electrical thermal properties (0–2.5 V, 30–196.8 °C) and exceptional photothermal conversion (130 mW cm −2 , 64.2 °C). Using an Internet of Things (IoT) microcontroller and Espressif (ESP) electronics chip, which are combined with wireless fidelity (Wi-Fi) and smartphone, real-time visualization and precise control of the temperature interface can be achieved. Furthermore, MP@CY-based knitted sensors, obtained by hand-knitting, are utilized for monitoring human movement and health, exhibiting high sensitivity and long-term cycling stability. Graphical Abstract
研究领域:
材料科学
·
纺织工程
·
电子工程
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 17
·25952-25963
·
IF 0
Di Hongcheng,Jiang Zhuwu,Sun Fengyi,Yang Jiahan,Cheng Wei,Lu Jiahui,Zhang Hongyu,Bai Xue
Nitrogen-containing disinfection by-products (N-DBPs) produced in the process of drinking water disinfection are widely concerning due to the high cytotoxicity and genotoxicity. It is due to the difficulty of natural degradation of N-DBPs in water and the fact that conventional treatment systems do not effectively treat N-DBPs in drinking water. In this study, N-nitrosopyrrolidine (NPYR) in water was electrocatalytically degraded by a three-dimensional electrode reactor (3DER). This system applied graphite plates as anode and cathode. The granular activated carbon (GAC) was used as third electrode. The degradation of NPYR using a continuous flow three-dimensional electrode reactor was investigated by examining the effects of flow rate, current density, electrolyte concentration, and pollutant concentration on the degradation efficiency, energy consumption, and reaction kinetics of GAC particle electrodes. The results showed that the optimal operating conditions were flow rate = 0.45 mL/min, current density = 6 mA/cm 2 , Na 2 SO 4 concentration = 0.28 mol/L, and NPYR concentration = 20 mg/L. Under optimal conditions, the degradation of NPYR exceeded 58.84%. The main contributor of indirect oxidation was deduced from free radical quenching experiments. NPYR concentration was measured by GC–MS with DB-5 capillary column, operating in full scan monitoring mode for appropriate quantification of NPYR and intermediates. Based on the identification of reaction intermediates, a possible pathway for the electrochemical oxidation of NPYR on GAC particle electrodes was proposed.
研究领域:
环境科学
·
化学工程
·
饮用水处理
✓ 已验证
DOI
PubMed
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 31
·期 4
·6511-6526
·
IF 5.8
Huang Likun,Wang Huixian,Wang Guangzhi,Mu Deying,Hou Yue,Di Xinyi,Zhou Simin,Wang Dongdong,Wang Dandan
The degradation of cellulosic ethanol wastewater by peroxymonosulfate (PMS) is one of the important methods to solve the environmental problems caused by it. In order to improve the degradation efficiency of cellulosic ethanol wastewater, the design of more catalytically active and stable chalcogenide catalysts has become a problem that needs to be solved nowadays. The application of foreign cations to replace the A- or B-site to increase the oxygen vacancy of the chalcocite catalyst to improve the efficiency of chalcocite catalytic degradation of wastewater has received much attention. In this work, the perovskite material LaCuO 3 was synthesized using a citric acid-sol–gel method, and the novel material La 1-x Sr x CuO 3 was prepared by doping of Sr element at the A position. In order to prepare catalytic materials with better performance, this study carried out performance-optimized degradation experiments on the prepared materials and determined that the catalytic efficiency of La 0.5 Sr 0.5 CuO 3 prepared under the conditions of the complexing agent dosage of 1:2, the gel temperature of 80 °C, and the calcination temperature of 700 °C was better than that of the catalytic materials prepared under other conditions. The prepared material has good recycling function; after four times recycling, the removal rate of pollutant COD is still more than 85%. This work provides a new synthesis method of perovskite material with good recycling function and high catalytic efficiency for the degradation technology of cellulosic ethanol wastewater. Graphical Abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）