INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Yan Zhao,Bolei Wei,Mi Wu,Huiliang Zhang,Jinrong Yao,Xin Chen,Zhengzhong Shao
In this work, silica nanoparticles modified with a new N -halamine precursor (EBDMH-SiO 2 NPs) were synthesized through immobilization of 3-(4′-epoxyethyl-benzyl)-5,5-dimethylhydantoin (EBDMH) on the surface of amino-functionalized silica NPs. Then, EBDMH-SiO 2 NPs and poly(lactic acid) (PLA) were blended at 185 °C to prepare a novel environmentally friendly PLA based nanocomposite (PLA/EBDMH-SiO 2 ). The addition of EBDMH-SiO 2 NPs has great influences on the thermal properties of nanocomposite. DSC results show that the grass transition temperature ( T g ), cold crystallization temperature ( T cc ) and melting temperature ( T m ) of PLA in nanocomposites gradually decrease with the increase of EBDMH-SiO 2 NPs contents up to 5%. After that, further rise in EBDMH-SiO 2 NPs content actually increases T g , T cc , and T m . The overall crystallization and spherulite growth rate of PLA show the similar trend. Furthermore, the introduction of EBDMH-SiO 2 NPs increases the storage modulus and viscosity of the melt of nanocomposite, providing an additional benefit for PLA blowing and injection molding. After chlorination, the N -halamine precursors on the nanocomposite surfaces are transformed into N -halamines, which provide strong antibacterial activities against E. coli (CMCC 44103) and S. aureus (ATCC 6538), pointing to good potentials of the PLA/EBDMH-SiO 2 nanocomposites for antibacterial applications including food packaging, filters, and a wide range of hygienic products.
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高影响因子
Materials
·
2025
·Vol. 18
·期 7
·1614
·
IF 3.2
Zhishu Chen,Chao Zhang
Poly(N-isopropylacrylamide) (PNIPAm) undergoes a sharp phase transition in aqueous solutions at around 32 °C, which is called the lower critical solution temperature; the tuning of the LCST of PNIPAm could be achieved by the copolymerization ofN-isopropylacrylamide (NIPAm) with other hydrophilic/hydrophobic monomers to regulate the solvation state of PNIPAm and meet the requirements of possible applications. Herein, a hydrophilic monomer, 2,3-dihydroxypropyl methacrylate (DHPMA), w introduced to regulate the phase transition behavior of PNIPAm via free radical copolymerization. A series of poly(N-isopropylacrylamide-co-2,3-dihydroxypropyl methacrylate) (P(NIPAm-co-DHPMA)) was synthesized and characterized. The reaction kinetics were investigated in detail. In this copolymerization, the reactivity ratios of DHPMA and NIPAm were found to be 3.09 and 0.11, suggesting that DHPMA had greater preference for homopolymerization than for copolymerization, while NIPAm had greater preference for copolymerization than for homopolymerization. The phase transition temperature of P(NIPAm-co-DHPMA) copolymers varied from 31 to 42 °C by controlling the content of DHPMA in the copolymers from 0 to 58 mol%. Finally, the good cytocompatibility of P(NIPAm-co-DHPMA) was confirmed. These results provide insights into designing thermo-responsive polymers with suitable responsive behaviors that meet the requirements of different applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lifan Li,Deming Zhou,Jiapeng Ye,Kun Luan,Zaixing Zhang,Lingxiao Jing,Tonghua Zhang
Long-lasting antibacterial properties in cotton fabric address microbial growth, odor formation, and hygiene issues, which are common drawbacks at the usage of natural fibers. Recent cotton market demands durable, eco-friendly solutions that enhance fabric longevity and performance in various applications. This study presents the development of a durable and multifunctional antibacterial cotton fabric achieved through a feasible and cost-effective “one-bath” impregnation process. A N -halamine precursor, featuring a terminal chlorine group (TD@Cl), was chemically bonded to the hydroxyl groups of cotton fabric, imparting enhanced antibacterial properties along with flame-retardancy, hydrophobicity, and self-cleaning capabilities. The TD@Cl treated fabric, designated as COTD, demonstrated exceptional antibacterial efficacy, exhibiting over 99.99% efficacy against both S. aureus and E. coli , with rapid bactericidal action within 3 min of contact. Notably, the COTD-Cl fabric maintained its antibacterial performance even after 40 washing cycles. Flame-retardancy tests revealed a 43.4% reduction in total heat release (THR) compared to untreated cotton. The fabric exhibited superior hydrophobicity and self-cleaning properties. Its air permeability and water vapour permeability are also discussed. These results highlight the potential of this efficient method to produce durable, multifunctional cotton fabrics suitable for a wide range of practical usages, such like garments, decoration and furniture etc.
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Nano Energy
·
2021
·
IF 17.881
Boyang Yu,Han Xiao,Yilin Zeng,Shiyou Liu,Dirui Wu,Pei Liu,Jinhua Guo,Wenke Xie,Jiangjiang Duan,Jun Zhou
Emerging thermocells have the commercialized potential for directly harvesting low-grade heat. Although a huge progress in p-type thermocells, their n-type counterpart has seriously lagged, becoming a major bottleneck for practical utilization of their integrated devices. Here, we developed a novel Cu-based thermosensitive crystallization and 3D multi-structured electrodes to synergistically boost the thermodynamic and kinetic characteristics of the n-type thermocell. As a result, the optimized Cu/Cu 2+ -based system achieved an exceptionally high value for the Seebeck coefficient (1.66 mV K –1 ) and the power density (3.5 W m –2 ), accompanied with a much competitive cost-performance metric (~$3.28 W –1 ), all of which were superior to the p-type benchmark. Furthermore, a high-performance p-n junction of thermocells was demonstrated with a 14.5 times enhancement of output, paving the way for advancing the integrated devices.
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高影响因子
AICHE JOURNAL
·
2024
·Vol. 70
·期 9
·e18492
·
IF 3.5
Yanli Zhang,Mengjin Zhou,Yangyang Wang,Zhaoyou Zhu,Yinglong Wang,Peizhe Cui,Jianguang Qi,Jingwei Yang,Fang Wang
Biobutanol is a green solvent commonly used as gasoline additive. In this study, it is proposed the separation of azeotropic mixtures of butanol and n-butyl ether (DBE) using ionic liquids (ILs). Suitable anions [AC] − and [H 2 PO 4 ] − were screened by COSMO-RS, and the effect of carbon chain length on the separation effect was investigated using quantum chemical calculations. It was found that the anion was primarily responsible for the separation effect, which grew as the carbon chain grew. Molecular dynamics simulations were used to verify the separation performance of the selected ILs. The separation effect of ILs was further verified using vapor–liquid phase equilibrium (VLE) experiments. The extractive distillation process with [PrMIM][AC] as the extractant was investigated to demonstrate the feasibility of ILs for the separation of butanol and DBE. This study analyzes the whole process from microscopic mechanism of action, which provides new ideas for the separation of alcohol-ether systems.
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高影响因子
Science China-Materials
·
2025
·
IF 7.4
Guo Ruiang,Li Shuaiqi,Zhang Jiawei,Tian Yi,Dong Weiguo,He Duanwei
Diamond is known as the ultimate semiconductor owing to its excellent physical properties. However, the high difficulty of n-type doping and the poor electrical performance of n-type diamonds remain major challenges for the application of diamond semiconductor materials. In this paper, a high-pressure thermal diffusion method for the n-type doping of diamond, which utilizes high pressure to reduce the volume difference between phosphorus atoms and carbon atoms, is reported for the first time. This method can achieve efficient doping and ionization of phosphorus atoms at the lattice sites of diamond. The prepared phosphorus-doped diamond exhibited the lowest resistivity (2 Ω cm) and highest electron concentration (2.27 × 10 18 cm −3 ) observed in any known phosphorus-doped diamond single crystal at room temperature (300 K). The high-pressure thermal diffusion method provides an effective approach for diamond n-type doping, which may play an important role in the design and preparation of future diamond-based semiconductor devices.
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高影响因子
Regenerative Biomaterials
·
2018
·Vol. 5
·期 3
·141-149
·
IF 0
Shen Taipeng,Zhu Wencheng,Yang Li,Liu Li,Jin Rongrong,Duan Jimei,Anderson James M,Ai Hua
Dendritic cell (DC)-based vaccines have shown promising therapeutic results in cancer and some immune disorders. It is critical to track in vivo migration behaviours of DCs and monitor the whole process dynamically and non-invasively. Superparamagnetic iron oxide (SPIO) nanoparticles are chosen for DC labelling under magnetic resonance imaging (MRI) because of their proven biosafety as contrast agents. However, when used for cell labelling, sensitive biological indicators such as cell autophagy may be helpful to better understand the process and improve the probe design. Here, lactosylated N-Alkyl polyethylenimine coated SPIO nanoparticles are used for DC labelling. This probe shows satisfactory cell labelling efficiency and low cytotoxicity. In this study, autophagy was used as a key factor to understand how DCs react to nanoparticles after labelling. Our results demonstrate that the nanoparticles can induce protective autophagy in DCs, as inhibition of the autophagy flux could lead to cell death. Meanwhile, the nanoparticles induced autophagy could promote DC maturation which is an essential process for its migration and antigen presentation. Autophagy induced DC maturation is known to enhance the vaccine functions of DCs, therefore, our results suggest that beyond the MRI tracking ability, this probe might enhance therapeutic immune activation as well.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Jiakang Han,Zihao Qiu,Gerile Naren,Rui Meng,Zikang Hu
In recent years, rare earth complexes containing amino acids have attracted much attention in numerous fields, such as light, electricity, catalysis, biological activity, drugs, etc. The rare earth element terbium is considered an important fluorescent metal due to its special electronic structure. It has excellent photophysical properties, such as high color purity, large Stokes shift, long excited state lifetime, and profuse energy levels. It has been used in the fields of fluorescent probes, medical radiation, and chemical sensors. Considering their wide applications, a series of acyl amino acid terbium complexes were synthesized using N-acyl amino acids as ligands, and their structures and photophysical properties were studied. The analysis of the theoretical and experimental results demonstrates that the energy transfer efficiency from ligands to the terbium ion emission levels increases with increasing alkyl carbon chain length, leading to differences in the luminescent intensity of the complexes. The energy transfer efficiency from ligands to rare earth ions was the result of a combination of the relative positions between the resonance energy levels of the central rare earth ion and the lowest triplet state energies of ligands as well as the intersystem crossing probability of the ligands. Moreover, the density functional theory (DFT) was used to determine the geometric structures and obtain 1 H NMR and FT-IR spectra of the terbium complexes. Their structures were further examined by comparing the calculated with the experimental spectra. The results show that the ligands coordinate to the central Tb 3+ through the bidentate chelation mode and that the theoretically determined structure was reliable.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Sainan Hu,Zhixiang Fu,Yongchao Chen,Chuyu Zhou,Zhengdong Fei
A novel polyvinylidene fluoride/bis(trimethoxysilylpropyl)amine (PVDF/BTMSPA) asymmetric composite membrane was fabricated through a one-step vapor-induced phase separation (VIPS) process. The hydrophilic BTMSPA monomers preferentially migrated to the membrane surface during VIPS, where they underwent hydrolysis and condensation to form a dense skin layer, while the hydrophobic PVDF matrix solidified into a porous support layer. By varying the VIPS duration, the skin layer structure could be tuned from porous to dense. At a VIPS time of 0.5 h, a spontaneously formed dense-skinned PVDF/BTMSPA composite membrane was achieved. The membrane demonstrated preferential adsorption of n-butanol over water, exhibiting optimal separation performance for a 4 wt% n-butanol/water mixture at 70 °C, with a flux of 1980 g/m 2 ·h and a separation factor of 63.65. This work not only provides a facile and efficient VIPS-based strategy for fabricating asymmetric composite membranes but also highlights the potential of PVDF/BTMSPA membranes for n-butanol/water separation applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiachang Liu,Yanqiang Zhou,Ruxangul Jama,Tursun Abduiryim,Abdukeyum Abdurexit,Hongtao Yang,Kai Song,Jiabei Li,Jinglei Chen,Wenjing Zhang
Layered double hydroxides (LDHs) have an abundance of redox reaction sites, giving them a high specific capacitance. However, the improvement of intrinsic electrical conductivity remains a great challenge due to the tendency of LDHs to agglomerate, under-exposure of active sites, and under-developed internal pore structure. In this work, cobalt–nickel hydroxide modified N-doped hollow mesoporous carbon spheres (CoNi-LDH/N-HMCS) were designed and prepared as electrode materials. The results showed that N-HMCS was uniformly wrapped by CoNi-LDH nanosheets, which suppressed the volume change and structural collapse of CoNi-LDH during charging and discharging, increased the dispersion of the active material, and exposed more active sites. At the same time, the unique high specific surface area and hollow mesoporous structure of N-HMCS opens up an effective way for electrolyte ion transport, shortens the ion diffusion path, and reduces the diffusion resistance, thus improving the charge/discharge efficiency of the material. In addition, the presence of two different metal ions in CoNi-LDH provides more redox reaction sites and improves electrical charge storage capacity. Satisfactory, the CoNi-LDH/N-HMCS electrode material exhibits an ultra- high mass ratio capacitance with 2244.4 F g −1 (1 A g −1 ). A hybrid supercapacitor together with CoNi-LDH/N-HMCS as the cathode material achieved a superior gravimetric energy density of 91.98 W kg −1 at a gravimetric power density of 750 W kg −1 and good cycling performance with 99.27 % cycle retention and 95.24 % coulombic efficiency for 10,000 cycles at 3a g −1 . In short, CoNi-LDH/N-HMCS composites have excellent energy storage performance and are hope for the development of new hydroxide composite electrodes for advanced energy devices.
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Small
·
2025
·
IF 12.1
Hao Xu,Yuye Dou,Xinrui Wang,Guangling He,Xia Li,Xuefeng Yan,Liangmin Yu
Herein, a simple, innovative, and efficient method is presented for synthesizing an electromagnetic wave (EMW)-absorbing material with a distinctive flower–ball structure. Acrylonitrile (AN)–styrene binary polymer microspheres (PAS) serve as seeds for the deposition of AN, forming petal-like structures and yielding uniform polymer flower balls (PAS&A-F). Carbonization of these flower balls produces PAS&A carbon flowers (PAS&A-CF) with excellent EMW absorption properties. PAS&A-CF carbonized at 800 °C exhibits a minimum reflection loss of −54.0 dB at a thickness of 2.92 mm and an optimal effective absorption bandwidth of 4.01 GHz. This exceptional performance is attributed to the unique petal-like cross-stacked flower–ball morphology, porous structure, N and O atom doping, and an appropriate degree of graphitization. These characteristics synergistically enhance impedance matching, multiple scattering and reflection, dipole polarization, and conductive loss. This straightforward, innovative, and highly efficient preparation approach, with precise control over surface morphology and temperature, offers a novel approach for developing high-performance EMW-absorbing materials.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Long Li,Chang Liu,Peiling Lin,Zhijie Gao,Yuhan Du,Pei-Gao Duan,Xingxing Jiao,Zhongxiao Song,Yangyang Liu,Shujiang Ding
Recently, significant progress has been made in the application of biomass in the field of supercapacitors, particularly in the development of high-performance electrode materials, which shows great potential and promise. Despite these advancements, the impact of specific surface area and pyrrolic nitrogen content on the final material performance remains inconclusive. The study underscores the pivotal role of nitrogen morphology in the nitrogen doping process, particularly highlighting the relationship between electrical properties and pyrrolic nitrogen content. Notably, when both the nitrogen doping content and the specific surface area increase concurrently, the electrical properties and pyrrolic nitrogen content exhibit a consistent “volcano-like” transition. Building on these insights, a porous nitrogen-containing carbon material, PCH-G-CR2, was synthesized. This material is characterized by a medium specific surface area, a high pyrrolic nitrogen content, and a rich microporous structure. In a three-electrode system, it demonstrates a specific capacitance of up to 551.25 F/g at a current density of 0.5 A/g. Moreover, its symmetrical device attained an energy density of 45.92 Wh/kg and a power density of 0.5 kW/kg. Notably, the capacity retention rate was 83.44% after 30,000 cycles at a high current density of 10 A/g. This study proposes an eco-friendly and efficient method for preparing biomass-based porous hydrothermal carbon materials suitable for high-performance supercapacitors.
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高影响因子
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