JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 30
·期 1
·1-10
·
IF 3.061
Huo Yanqiu,Lin Changhong,Ge Huan,Ying Puyou,Huang Min,Zhang Ping,Yang Tao,Wang Tianle,Wu Jianbo,Yan Yusi,Levchenko Vladimir
In this work, the Polyurethane/MoS 2 composites (PUM) filled with different amount of modified molybdenum disulfide (MoS 2 ) were prepared by solution-blending-casting method. The thermal reversible Diels–Alder (DA) bonds enabled the polymer system recyclable ability. The modified MoS 2 were obtained by tannic acid (TA) assistant ultra-sonication exfoliation method were used to improve the gas barrier performance of materials. Compared with the pure PU, about twofold decrease in oxygen gas permeability of PUM composites (from 6719 to 3927 cm 3 /m 2 ˙d˙Pa) were obtained with 1 wt% MoS 2 . More important, the samples showed excellent gas barrier and mechanical properties before and after being hygrothermal aged for 100 h. The PUM composites had good gas barrier and recyclability and had great potential application prospects in packing materials.
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高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 6
·期 1
·1-11
·
IF 11.806
Shen Yangyang,Yang Wenke,Hu Fudong,Zheng Xuwei,Zheng Yanjun,Liu Hu,Algadi Hassan,Chen Kui
Real-time physiological signal monitoring is very essential to evaluate the function recovery, and the construction of ultrasensitive strain sensor has become the key technique and research hotspot in cardiac rehabilitation. Here, piezoresistive conductive polymer composites (CPCs)–based strain sensor, of which the conductive MXene/AgNW composite film served as the sensing materials and the flexible and stretchable thermoplastic polyurethane (TPU) acted as the supporting layer, was developed and further pre-strain treated to construct the ultrasensitive microcrack structure. Importantly, changing the mass percentage of MXene, sample thickness, and pre-strain amplitude can effectively tune the microcrack structure to achieve the optimization of strain-sensing performance of the sensor. As a result, the prepared strain sensor exhibits an ultrahigh sensitivity (gauge factor (GF) = 602), wide working range (90% strain), low detection limit (0.2%), rapid response and recovery time (60 ms/70 ms), and long-term durability over 1000 cycles. As a proof of concept, it can accurately monitor the pulse rate and respiration rate under different sports states and the simulated breathing modes, which will undoubtedly provide strong guarantee for the real-time health monitoring during the treadmill exercise and assessment of cardiac status. This work will undoubtedly possess a great guidance in the evaluation of cardiac rehabilitation.
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Nano-Micro Letters
·
2022
·Vol. 15
·期 1
·1-14
·
IF 23.655
Liang Jiajie,Wang Shaojie,Luo Zhen,Fu Jing,Hu Jun,He Jinliang,Li Qi
Ferroelectric polymer nanocomposites possess exceptional electric properties with respect to the two otherwise uniform phases, which is commonly attributed to the critical role of the matrix–particle interfacial region. However, the structure–property correlation of the interface remains unestablished, and thus, the design of ferroelectric polymer nanocomposite has largely relied on the trial-and-error method. Here, a strategy that combines multi-mode scanning probe microscopy-based electrical characterization and nano-infrared spectroscopy is developed to unveil the local structure–property correlation of the interface in ferroelectric polymer nanocomposites. The results show that the type of surface modifiers decorated on the nanoparticles can significantly influence the local polar-phase content and the piezoelectric effect of the polymer matrix surrounding the nanoparticles. The strongly coupled polar-phase content and piezoelectric effect measured directly in the interfacial region as well as the computed bonding energy suggest that the property enhancement originates from the formation of hydrogen bond between the surface modifiers and the ferroelectric polymer. It is also directly detected that the local domain size of the ferroelectric polymer can impact the energy level and distribution of charge traps in the interfacial region and eventually influence the local dielectric strength.
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PubMed
高影响因子
RARE METALS
·
2022
·Vol. 42
·期 3
·916-928
·
IF 6.318
Hu Jin-Zhi,Liu Wen-Jie,Zheng Ji-Hua,Li Guo-Chun,Bu Yong-Feng,Qiao Fen,Lian Jia-Biao,Zhao Yan
Cobalt selenide (CoSe 2 ) has become a promising anode material for sodium-ion batteries (SIBs) due to its stable chemical properties, environmental friendliness, and high theoretical capacity. However, the undesirable rate capacity and cycle stability of the anode materials largely limit its applications for SIBs due to the relatively low electronic conductivity and huge volume change during the Na + insertion/extraction. In this study, electrostatic spinning combined with a wet chemical method is employed to synthesize coral-like composite material (CNF@c-CoSe 2 /C), which is composed of CoSe 2 /carbon nanosheet arrays (CoSe 2 /C) and carbon nanofibers (CNFs). CoSe 2 /C nanoflakes derived from metal-organic frameworks (MOFs) with high surface area and the porous structure can inhibit the pulverization and amorphization of CoSe 2 during charge and discharge processes, thus significantly keeping the stability of the microstructure. CNF can limit the overgrowth of nanosheets and serve as a conductive skeleton. Compared to two-dimensional CoSe 2 /C nanoflakes and pure CoSe 2 nanoparticles, the composite can expose more active sites and effectively accelerate the diffusion of Na + , which displays enhanced rate capability (266.5 mAh·g −1 at 5.0 A·g −1 ) and cycling stability (268.3 mAh·g −1 after 100 cycles at 1.0 A·g −1 ). Moreover, the rational preparation strategy for metal selenide-based heterostructure material presents a new way for high-performance SIBs. Graphical abstract
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 5
·1-9
·
IF 2.8
Chen Jiajia,Dai Fengting,Liu Haotian,He Zhengguang,Gao Hui,Liu Gen
In this work, three specialized oxidases for glucose, lactate and cholesterol are absorbed on carbon microspheres (CSs), which can produce hydrogen peroxide during their substrate-specific enzymatic activity. Electrochemiluminescent (ECL) is generated by the electrochemical reaction between luminol and hydrogen peroxide on an ECL biosensor array, whose light signals are collected by a CCD camera. Under optimum conditions, calibration curves are constructed for glucose, lactate, cholesterol concentrations and ECL intensities. The detection limits of the different biosensors are found to be 12 μM for glucose, 3 μM for lactate and 19 μM for cholesterol. Furthermore, the resulting ECL biosensor array is expected to be an alternative analytical tool in clinical analysis because of its good stability, acceptable precision and reproducibility.
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Journal of Coatings Technology and Research
·
2023
·Vol. 20
·期 4
·1223-1234
·
IF 2.3
Kundu Chanchal Kumar,Li Zhiwei,Khan M. Azizur R.,Försth Michael,Das Oisik
Multi-functional textiles have received much attention in the technical textile field for their novel functionalities available in a single substrate. Polyamide 66 (PA66), being an engineering polymer with excellent physio-mechanical properties, exhibits immense possibilities to be developed as a multifunctional textile substrate. In this work, multi-functional polyamide 66 (PA66) textiles equipped with enhanced electro-conductive, hydrophilic and flame-retardant properties were developed via in situ polymerization of pyrrole monomer onto the PA66 fabric surfaces. Meanwhile, various formulations comprised of phytic acid (PA), chitosan (CS), graphene oxide (GO) and Na-metaborate (B) along with the pyrrole also experimented with a goal to study the contribution of each compound onto the desired properties and finally, to come up with a suitable formulation. Among these formulations, only pyrrole containing formulation (i.e., PA66-PPy) demonstrated a significant improvement in all three desired functionalities, namely a noteworthy escalation in electrical conductivity (i.e., about a 43 times increase compared to the pure PA66), a semi-hydrophilic surface (i.e., water contact angle value was lowered from 124.3– 49.9°) and a substantial reduction in the peak heat release rate by 45%. Meanwhile, the formulation comprising both the pyrrole and phytic acid made the polyamide surface a super-hydrophilic one, whereas other formulations exhibited potential efficacy in attaining better flame retardancy, especially in terms of limiting oxygen index (LOI) values, vertical flame test data and char yield%. Graphical abstract
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Nano Research
·
2022
·Vol. 16
·期 5
·7148-7163
·
IF 10.269
Zhang Xiaoge,Chen Xiaomei,Zhang Peng,Li Meiting,Feng Miao,Zhang Yaqian,Cheng Lili,Tang Junjie,Xu Langtao,Liu Yadong,Liu Zhuoyin,Cao Zhong,Liu Jie
Nanomaterial-mediated phototherapy in tumor treatment has been developed rapidly in the past few years due to its noninvasive character. However, the low energy conversion efficiency and high recombination rate of the photo-triggered electron-hole pairs of single nano-agent limit the phototherapy efficiency. Herein, we constructed a novel two-dimensional nanoheterojunction MoS 2 -Ti 3 C 2 (MT), which allowed a high photothermal conversion efficiency (59.1%) as well as an effective separation of photo-triggered electron-hole pairs for reactive oxygen species (ROS) generation under single 808 nm laser irradiation. Upon the modification of the mitochondrial targeted molecule (3-proxycarboxylic) triphenyl phosphine bromide (TPP) and 4T1 cell membrane, m@MoS 2 -Ti 3 C 2 /TPP (m@MTT) could effectively target to the tumor cell and further locate to the mitochondria to amplify tumor-specific oxidative stress, which not merely effectively inhibits the local tumor growth but also induces tumor immunogenic cell death (ICD) for activating antitumor immune response. Additionally, cytosine guanine dinucleotide (CPG), as a Toll-like receptor 9 (TLR9) agonist, was further introduced to the system to boost adaptive immune responses, resulting in improved level of cytotoxic T cells as well as a decrease in the number of regulatory T cells. In vivo antitumor mechanism studies demonstrated that not only the primary and distant tumors in 4T1 bearing-tumor mice model were significantly inhibited, but also the lung metastasis of tumor was effectively suppressed. Therefore, this work revealed the ROS generation mechanism of MT nanoheterojunction and provided a novel strategy to fabricate a biomedically applicable MT nanoheterojunction for tumor treatment.
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高影响因子
ONCOGENE
·
2022
·Vol. 42
·期 7
·530-540
·
IF 8.756
Shi Feiyu,Liu Gaixia,Lin Yufeng,Guo Cosmos liutao,Han Jing,Chu Eagle S. H.,Shi Chengxin,Li Yaguang,Zhang Haowei,Hu Chenhao,Liu Ruihan,He Shuixiang,Guo Gang,Chen Yinnan,Zhang Xiang,Coker Olabisi Oluwabukola,Wong Sunny Hei,Yu Jun,She Junjun
Appendectomy impacts the homeostasis of gut microbiome in patients. We aimed to study the role of appendectomy in colorectal cancer (CRC) risk through causing gut microbial dysbiosis. Population-based longitudinal study (cohort 1, n = 129,155) showed a 73.0% increase in CRC risk among appendectomy cases throughout 20 years follow-up (Adjusted sub-distribution hazard ratio (SHR) 1.73, 95% CI 1.49–2.01, P < 0.001). Shotgun metagenomic sequencing was performed on fecal samples from cohort 2 ( n = 314). Gut microbial dysbiosis in appendectomy subjects was observed with significant enrichment of 7 CRC-promoting bacteria ( Bacteroides vulgatus, Bacteroides fragilis, Veillonella dispar, Prevotella ruminicola, Prevotella fucsa, Prevotella dentalis, Prevotella denticola ) and depletion of 5 beneficial commensals ( Blautia sp YL58, Enterococcus hirae, Lachnospiraceae bacterium Choco86, Collinsella aerofaciens, Blautia sp SC05B48 ). Microbial network analysis showed increased correlation strengths among enriched bacteria and their enriched oncogenic pathways in appendectomy subjects compared to controls. Of which, B. fragilis was the centrality in the network of the enriched bacteria. We further confirmed that appendectomy promoted colorectal tumorigenesis in mice by causing gut microbial dysbiosis and impaired intestinal barrier function. Collectively, this study revealed appendectomy-induced microbial dysbiosis characterized by enriched CRC-promoting bacteria and depleted beneficial commensals, signifying that the gut microbiome may play a crucial role in CRC development induced by appendectomy.
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高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 6
·期 1
·1-14
·
IF 11.806
Xiao Lin,Xu Weichang,Huang Lixia,Liu Jili,Yang Guang
Effective postoperative therapy is crucial for preventing tumor recurrence and metastasis. Nanocomposite (NC) pastes of Gel/CS-g-CD NP with unique viscoelastic properties and pH-responsive drug delivery ability were prepared from gelatin (Gel) and β-cyclodextrin-grafted chitosan nanoparticles (CS-g-CD NPs) through host–guest interactions between the aromatic amino acid residues of gelatin and β-cyclodextrin. The dynamic rheological properties, shear strength, and shear viscosity were modulated through variations in the concentration of CS-g-CD NPs in the NC pastes. Due to the reversibility of the host–guest interactions, the NC pastes exhibited shear-thinning and self-healing properties, endowing them with good injectability. Loading of doxorubicin (DOX) in the nanoparticles (DOX-CSCD NPs) forming the NC pastes of Gel/DOX-CSCD NP allowed pH-triggered DOX release in a simulated tumoral microenvironment, because of the labile nature of the CS-g-CD NPs under acidic conditions. In vitro experiments showed that the NC pastes of Gel/DOX-CSCD NP induced sustained tumor cell inhibition. Moreover, in vivo studies with tumor-bearing mice indicated that the NC pastes of Gel/DOX-CSCD NP can effectively inhibit tumor recurrence after surgical resection. Therefore, the NC pastes described in this work may act as an effective injectable drug delivery system for postoperative tumoral treatment.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 6
·16729-16740
·
IF 5.19
Xue Yun,Wang Yue-Lin,Zheng Yang-Hai,Yang Yu-Sheng,Xu Wen-Da,Yan Yong-De,Zhao Ran,Zhang Qing-Guo,Liu Xin,Ma Fu-Qiu,Zhang Mi-Lin
Molten salt oxidation (MSO) is an advanced method for waste resins treatment; nevertheless, the research about gas product variations of resins under different stoichiometric air feed coefficient (α) is rare. The optimal working condition of hazardous waste disposal is obtained through thermodynamic equilibrium calculation, and the method to improve the treatment efficiency is found to guide the optimization of the actual experiment. In this paper, Fact Sage was used to calculate the oxidation products of cation exchange resins (CERs) at different temperatures and α, focusing on the similarities and differences through the contents of CO, CH 4 , CO 2 , and SO 2 during the oxidation of CERs, the MSO of CERs, and the theoretical calculation. The results indicated that the gas products of the calculation and reality of the oxidation process of CERs are quite different, while the CO contents of CERs during MSO are close to the calculated values. The main reason for this consequence is that in the oxidation process of CERs, the S in the sulfonic acid group will form thermally stable C-S with the styrene–divinylbenzene skeleton. Moreover, the introduction of carbonate can promote the destruction of C-S and absorb SO2 as sulfate, weakening the influence of C-S on the oxidation products of CERs. The gas chromatograph results indicated that the SO 2 content is reduced from 0.66% in the process of CERs oxidation to 0.28% in MSO of CERs. When 1.25 times stoichiometric air feed coefficient is fed, the sulfate content in the carbonate is the highest at 900 °C, which is 23.4%.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 5
·2140-2155
·
IF 4.5
Zhang Yeguang,Li Yingchao,Liu Wenxin,Li Feihu,Zhan Zili
CH 4 sensors based on metal oxide semiconductors (MOS) provide high sensitivity and fast response, but the sensitivity will be lost when they are poisoned by silicone. Therefore, there is an urgent need to address the poisoning deactivation of MOS gas sensors caused by silicone. Here, the unique strategy of coating a reactive anti-poisoning material onto the surface of the sensing material is proposed to effectively improve the anti-poisoning ability without degrading the gas sensing performance. As an experimental verification, SnO 2 /α-Al 2 O 3 is designed as the anti-poisoning layer and SnO 2 loaded with precious metals (Pt and Pd) as the sensing layer. Owing to the protection of the anti-poisoning layer, the response ( R a / R g = 24.69) and the response/recovery time (1/24 s) of the sensor to CH 4 remained undiminished at 364 °C after being poisoned under an air/hexamethyldisiloxane (HMDSO) (10 ppm) environment for 40 min, which meets the requirements of the Chinese National Standard (GB 15322.2-2019). The mechanism analysis shows that HMDSO can be decomposed with the adsorbed oxygen on the surface of SnO 2 in the anti-poisoning layer, and CH 4 can diffuse into the sensing layer to be detected. The unique anti-poisoning strategies can provide a promising insight for improving the poisoning tolerance of MOS gas sensors. Graphical abstract
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WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 2
·1-13
·
IF 2.9
Wei Yaru,Zhang Kaili,Cheng Tiexin,Zhou Guangdong
In this paper, FeS m /BC composites were prepared using coconut shell biochar (BC) as the carrier. FeS m on FeS m /BC is preferentially oriented along the (001) crystal plane and exhibits a uniform honeycomb morphology. It has a high specific surface area and a small pore size distribution, which is more suitable as a heavy metal ion removal material. The results show that Cr(VI) can be almost completely removed within 120 min under acidic conditions with an initial concentration of 10 mg/L of Cr(VI), a temperature of 20 °C, and a dosage of 0.6 g/L of adsorbent. Where pH was the main factor influencing the removal of Cr(VI):pH affects Cr(VI) removal by changing the form of Cr(VI) in the solution, adsorption free energy, redox potential, charged species on FeS m /BC surface, and the reduction properties of Fe 2+ and S 2− , low pH value is more favorable for Cr(VI) removal. Coexisting anions in solution inhibit Cr(VI) removal due to competitive adsorption, but coexisting cations have no effect. The adsorption process of Cr(VI) by FeS m /BC follows the pseudo-second-order kinetics and Langmuir adsorption isotherm model, indicating that the adsorption process is a monolayer surface adsorption controlled by the chemical adsorption mechanism and involves electron sharing or exchange between adsorbent and adsorbate. Thermodynamic study shows that the adsorption process is a spontaneous entropy-increasing process, and raise the temperature is beneficial to the adsorption. The removal of Cr(VI) by FeS m /BC is the synergistic effect of adsorption, reduction, and co-precipitation.
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危险品化学品经营许可证（带存储）