REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Yubin Li,Zhijian Yang,Ling Ding,Liping Pan,Jianhu Zhang,Xue Zheng,Congmei Lin
Damages generated in functional materials can deteriorate their performance and shorten their lifetime, endowing the materials with self-healing ability is expected to resolve this problem. In this work, a novel energetic composite refers to CL-20 based PBX, which can self-heal its mechanical damage under a mild condition, was designed and prepared via incorporating disulfide bonds into the polymeric binder. The highly efficient self-healing polyurethane-urea containing disulfide bonds (DSPU) was synthesized by using the prepolymer of poly(caprolactone) diol (PCL-diol) with isophorone diisocyanate (IPDI) as the main-chain to achieve good mechanical toughness, then cross-linking with bis(4-aminophenyl) disulfide (APD) to gain the superior reversibility. The CL-20 based PBX using this DSPU as binder can evidently self-heal its inner damage, i.e. micro-crack, after heating at 60 °C for several hours, and the strength of the damaged sample after Brazilian test can also be recovered to more than 70% of the pristine value.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Chunyan Tang,Jiayan Pan,Jiayue Wu,Xingwang Zhao,Jinglei Lei,Lingjie Li,Fusheng Pan
Magnesium alloys have promising application prospects in aeronautical and aerospace fields, but are susceptible to performance damage. Therefore, it is of great significance to construct surface coatings with surroundings-adaptability to endow magnesium alloys with robustness in harsh environment. Herein, a rare-earth-coating with surroundings-adaptability was prepared on AZ31 magnesium alloy by chemical conversion and stearic-acid modification. The as-constructed coating is composed of the micro-nano-structured lanthanum/magnesium stearate, which is superhydrophobic with a water contact angle of 154.5°. The coating can reduce the i corr value of magnesium alloy by two orders of magnitude. The as-coated sample demonstrates extraordinary self-cleaning performance and strong resistance to various mechanical (tape peeling, friction/wear, sand/rain impact, ultraviolet irradiation) and chemical (acid/salt/alkali, organic solvent , corrosive medium) damage, showcasing remarkable surroundings-adaptability. Such surroundings-adaptability is resulted from the durable superhydrophobicity of the coating, which reduces the contact area between the coating and the harmful mediums. The surroundings-adaptive coating enables robustness of magnesium alloys in harsh environment, which can promote their wide applications in aeronautics and aerospace.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Cell Reports Physical Science
·
2020
·
IF 0
Peng-Kun Yang,Xiu-Li Zhu,Lu Huang,Yin Zhou,Gan-Qiang Song,Chi-Chu Qin,Dong Wang,Ying-Peng Wu
Summary Flexible electronics have been rapidly developed in recent years. However, there are still some concerns about the degradation and short life caused by mechanical damage during their operation. Here, we present a self-healing electret nanogenerator (SENG) that can restore its structure and function after mechanical damage, benefiting from a healable polymer with reversible imine bond and the instantaneous healing ability of liquid metal. After destructive testing comprising four cutting-healing cycles the output current of the SENG autonomously recovers to the original values before damage. Finally, as a practical device, the SENG is demonstrated to work in both energy harvesting and human physiology-monitoring applications. This research offers a feasible route for improving reliability and lifetime of electret generators or other flexible electronics that suffer from mechanical damage.
研究领域:
材料科学
·
柔性电子
·
生物医学工程
✓ 已验证
DOI
FOOD CHEMISTRY
·
2024
·
IF 8.5
Wanjun Xu,Yulong Bao,Hao Gou,Baoguo Xu,Hui Hong,Ruichang Gao
In order to investigate the effects of multi-frequency ultrasound-assisted immersion freezing (MUIF) on the meat quality of Macrobrachium rosenbergii , tail meat was subjected to different MUIF treatments respectively, namely 20 + 40 kHz (MUIF-20 + 40), 20 + 60 kHz (MUIF-20 + 60), 40 + 60 kHz (MUIF-40 + 60) and 20 + 40 + 60 kHz (MUIF-20 + 40 + 60), and the immersion freezing (IF) as control. Results showed that average diameter of ice crystals was 28 μm in IF, and that was only 8 μm in MUIF-20 + 40 + 60. When compared to IF, MUIF alleviated oxidative deterioration of lipids and proteins, but only at higher ultrasound frequency (MUIF-40 + 60; MUIF-20 + 40 + 60). Carbonyl content of MUIF-20 + 40 + 60 was only 40% of that in IF. Similarly, protein denaturation was inhibited in MUIF (except for MUIF-20 + 40). Transmission electron microscopy showed greater distortion of the ultrastructural components in IF, MUIF-40 + 60, and MUIF-20 + 40 + 60, suggested by bended Z -line. In conclusion, MUIF can be an effective strategy to mitigate mechanical damage and protein deterioration in the meat of Macrobrachium rosenbergii .
研究领域:
食品科学
·
水产养殖学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Genes
·
2020
·Vol. 11
·期 5
·478
·
IF 3.759
Ying Sun,Mei Gao,Seogchan Kang,Chengmin Yang,Hui Meng,Yun Yang,Xiangsheng Zhao,Zhihui Gao,Yanhong Xu,Yue Jin,Xiaohong Zhao,Zheng Zhang,Jianping Han
Dalbergia odorifera, a critically endangered tree species, produces heartwood containing a vast variety of flavonoids. This heartwood, also known as Chinese rosewood, has high economic and medicinal value, but its formation takes several decades. In this study, we showed that discolored wood induced by pruning displays similar color, structure, and flavonoids content to those of natural heartwood, suggesting that wounding is an efficient method for inducing flavonoid production inD. odorifera. Transcriptome analysis was performed to investigate the mechanism underlying wounding-induced flavonoids production inD. odoriferaheartwood. Wounding upregulated the expression of 90 unigenes, which covered 19 gene families of the phenylpropanoid and flavonoid pathways, including PAL, C4H, 4CL, CHS, CHI, 6DCS, F3’5’H, F3H, FMO, GT, PMAT, CHOMT, IFS, HI4’OMT, HID, IOMT, I2’H, IFR, and I3’H. Furthermore, 47 upregulated unigenes were mapped to the biosynthesis pathways for five signal molecules (ET, JA, ABA, ROS, and SA). Exogenous application of these signal molecules resulted in the accumulation of flavonoids in cell suspensions ofD. odorifera, supporting their role in wounding-induced flavonoid production. Insights from this study will help develop new methods for rapidly inducing the formation of heartwood with enhanced medicinal value.Keywords:Dalbergia odorifera;flavonoid biosynthesis;heartwood;mechanical wounding;signals;transcriptome
研究领域:
植物生理学
·
分子生物学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENTIA HORTICULTURAE
·
2024
·
IF 3.9
Xiaojie Pei,Shuxin Sun,Xin Dai,Ke Liu,Ying Yang,Laifeng Lu,Yansheng Wang
Goji berry ( Lycium barbarum ) is a typical berry with a tender and thin pericarp, high moisture content and hollow interior, making it highly susceptible to mechanical damage caused by harvest and transportation. As a consequence, this susceptibility results in considerable economic losses within the fresh produce industry due to the degradation of fruit quality and subsequent decay. Here, oligogalacturonides (OGs), a well-characterized plant damage-associated molecular pattern, were applied to reduce postharvest loss and extend the shelf life of berries of the goji cultivar NingQi1. The loss rate in the OGs treatment was 44.45 % lower than that in the 0.8 mm compression treatments on Day 6, and the OGs treatment also effectively inhibited softening and delayed weight loss. The activity of superoxide dismutase increased by 27.4 % on the 4th day after OGs treatment, accompanied by a decrease in malondialdehyde content ranging from 14.2 % to 24.8 % on days 2 to 4 compared to the control group. Furthermore, the phenylalanine ammonia-lyase activity of OGs-treated goji berries was 57.0 % higher than that of the control at 6th days, which slowed the reduction in secondary metabolites such as total flavonoids. The findings of this study indicated that OGs may reduce postharvest losses caused by mechanical damage, extend the shelf life of goji berry by reducing softening and weight loss, and reduce wounding injury by minimizing free radical form of reactive oxygen species.
研究领域:
植物学
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食品科学
·
园艺学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Yuxin Shi,Jingwen Tang,Wanjie Sun,Haifeng Tang,Xinxin Xia,Tianyu Wang,Jianxiang Ding,Peigen Zhang,ZhengMing Sun
Metal whisker growth poses a significant reliability threat to electronic devices. Previous investigations have predominantly focused on metal platings and alloy solder samples, yet the intricate factors involved have yielded inconsistent comprehension of the phenomenon. To achieve a comprehensive understanding, exploring intermetallic compounds (IMCs) may offer a novel standpoint. Herein, we present the first report on the growth of single crystal cadmium (Cd) whiskers on Ti 2 Cd IMC, accompanied by the characterization of their composition, crystal structure, and morphological features. Furthermore, the influence of mechanical damage and temperature on the whisker growth is examined. Ball milling induces the decomposition of Ti 2 Cd, liberating active Cd atoms with elevated chemical potentials that consequently feed the whisker growth. These findings augment the existing knowledge on the topic of the metal whisker growth and provide fresh perspectives and references for further investigations in this field.
研究领域:
材料科学
·
金属腐蚀与防护
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固态物理
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电子器件可靠性
·
无机化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Li Juan,Yang Chenxi,Niu Ziru,Ye Shenglan,Hua Dongwen
Oil/water separation constitutes a significant global challenge owing to the challenges in selectively isolating either water or oil from mixtures encountered in practical settings. To overcome this obstacle, photo-responsive materials capable of reversible wettability shifts have been utilized for oil/water mixture separation, capitalizing on their wetting behavior. In this work, we employ spray-coating to engineer smart surfaces that transition reversibly between hydrophilic and hydrophobic states upon UV/vis irradiation. The resultant modified polyester (PES) mesh, functionalized with a hydrophobic polydimethylsiloxane (PDMS) coating, ZnO-tetrapod (ZnO-T), and 4,4′-diaminoazobenzene (DAAB), displays a porcupinefish-like surface morphology. This architecture confers upon the mesh a significantly reversible photo-responsive wettability, coupled with improved resilience against mechanical damage. The water contact angle measures approximately 140.0° under visible light and decreases to approximately 10.0° upon exposure to 365 nm UV light. The engineered PES surface achieves photo-responsive removal of oil or water from oil/water mixtures ("oil-removing" and "water-removing"). In addition, the porcupinefish-like topology of the modified PES imbues it with significant resistance to repeated mechanical deformation and damage, suggesting suitability for diverse real-world applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Lixia Wang,Pengyuan Cui,Zhaojie Bi,Chen Wang,Baokai Zhou,Lun Zheng,Hongbin Niu,Dongfang Wang,Qian Li
Superhydrophobic self-cleaning of polymer materials is realized based on the formation of micro-nano morphology structures on the surface of the materials usually. However, such surface has poor resistance to mechanical damage and easily wears, and the widespread application is limited. In this work, a superhydrophobic porous material with a self-cleaning function, long-term stability, high durability, and high resistance to mechanical damage was developed based on supercritical fluid micro-foaming and the construction of complex hierarchical micro-nanosized structures in the later stage. The surface of porous sample presents a complex micro-nanosized hierarchical structures with a scale progressive ridge-groove, which increased the water contact angle from 110° to a superhydrophobic contact angle of 156°, decreased the sliding angle to 3.5°, and presented an obvious water repellency. Using the water repellency, self-cleaning function of the porous sample was realized. More importantly, the porous material exhibits superior superhydrophobic stability under long-term strong mechanical damage such as ultrasound, knife scratching, repeated bending, and wire ball scraping, and maintains excellent stability in strong acid/alkali, high and low temperature extreme environments. A stable superhydrophobic high-performance porous material with a self-cleaning function was prepared, and the application of ultra-high molecular weight polyethylene (UHMWPE) porous materials in superhydrophobic field was expanded and spread widely, which provides a certain insight for the preparation of superhydrophobic porous materials with superior durability and strong mechanical damage resistance.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD BIOCHEMISTRY
·
2021
·Vol. 45
·期 4
·e13647
·
IF 2.72
Yiqin Zhang,Honglei Mu,Haiyan Gao,Hangjun Chen,Weijie Wu,Yanchao Han,Xiangjun Fang,Chuan Tong
Mechanical damage and microbial infestation were critical issues during strawberry transportation. This study prepared a modified polyvinyl formal (PVFM) vibration-damping material and investigated its application in strawberry transportation. This modified PVFM was primarily composed of polyvinyl alcohol, starch, formaldehyde, and allyl isothiocyanate. Our results showed that the modified PVFM had good vibration-damping and antifungal properties with 0.137 g/m 3 of density, a water absorption ratio value of 6.24, 278 Pa of tensile strength, 3.86 Pa of elastic modulus, a buffer coefficient of 0.318, and antifungal rates of 68.8% and 80.6% against Bacillus anthracis and Botrytis cinerea , respectively. Moreover, this modified PVFM could enhance the storage life of strawberry by improving PAL activity from 376 to 3,125 U/g, inhibiting POD activity with a maximum value of 3.1 U/g, and decreasing CAT activity from 324 to 35 U/g. The modified PVFM presented a good vibration-damping capacity and the potential to extend strawberry shelf life. Practical applications Berry fruits were vulnerable to mechanical damage caused by vibration during transportation, resulting in quality deterioration, rot, and aging. In this study, modified polyvinyl formal (PVFM) was prepared and was of low density and displayed good mechanical, vibration-damping, and antifungal properties. The modified PVFM could improve the storage life of strawberry. Thus, the modified PVFM could have potential application in berry fruits transportation.
研究领域:
食品科学
·
农产品贮藏与加工
·
高分子材料学
·
园艺产品采后生理
·
包装工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Dong-Yang Zhang,Jia-Xin Yang,En-Jiang Liu,Run-Ze Hu,Xiao-Hui Yao,Tao Chen,Wei-Guo Zhao,Li Liu,Yu-Jie Fu
Strawberry is a nutritious food that is susceptible to mechanical injury and microbiological infection. Traditional coatings for strawberry packaging provide resistance against microbial infection but not against mechanical damage. In this study, a soft and elastic cellulose sponge modified with silver nanoparticles ( [email protected] :1) was prepared as strawberry packaging material, and it provided effective protection against mechanical damage. In addition, after 1000 cyclic compression, [email protected] :1 presented only 16.80% unrecoverable deformation and still had elasticity, suggesting its fatigue resistance and durable protection for strawberry against damage caused by repeated vibrations during transportation. In addition, [email protected] :1 had good antibacterial ( E. coli and S. aureus ) and antifungal ( Rhizopus stolonifer ) abilities. The storage time of strawberries packaged by [email protected] :1 was extended to 12 days without microbial invasion. Thus, [email protected] :1 provided dual protection at the physical and microbial levels. This study proposes a new method for the preservation of strawberries based on the utilization of cellulose.
研究领域:
材料科学
·
食品科学
·
生物技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 15
·7170
·
IF 4.9
Maria Alievna Abdullina,Jiarui Li,Feifan Liu,Xinyi Luo,Anastasia Igorevna Barsukova,Svetlana Vladimirovna Trusova
Plant subtilases, as hydrolytic enzymes, contribute to certain plant stress response pathways by cleaving precursor proteins into active peptides or through other less well-characterized mechanisms. Phytaspases represent a specific subgroup of subtilases, and their participation in rapid stress responses, particularly to herbivory attacks and drought, is already well established, in contrast to their poorly understood role in long-term responses. This study investigated the involvement of phytaspase NbSBT1.9-2 in the long-term stress responses ofNicotiana benthamiana. Plants were subjected to either mild to severe mechanical wounding or drought stress, followed by the detection of phytaspase activity and gene expression in the leaf tissue. The results revealed a distinct involvement of phytaspase in the wounding response, showing increased activity and upregulated expression correlated with the extent and recurrence of wounding. In contrast, no significant change in phytaspase activity was observed in the leaves under drought, alongside salinity and heat stress conditions. Consequently, phytaspase association with the long-term response to mechanical injury was demonstrated usingN. benthamianaas a model organism.
研究领域:
植物生物学
·
胁迫生理学
·
分子植物学
·
酶学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）