LANGMUIR
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2016
·
IF 3.993
Zefeng Wang,Weiwei Ye,Xinran Luo,Zhonggang Wang
Highly cross-linked poly(divinylbenzene) (PDVB) spherical colloidal particles with nano-, submicron-, and micron-sizes of 157.2 nm, 602.1 nm, and 5.1 μm were synthesized through emulsion and dispersion polymerization methods. The influences of particle size on the surface morphology, roughness, superhydrophobicity, and critical cracking thickness of colloidal films were studied in detail. The results show that PDVB colloidal films possess large water contact angle (CA) over 151°, belonging to superhydrophobic materials. Moreover, it is interesting to observe that the highly cross-linked network structure leads to PDVB film’s excellent heat-resistance. The CA and rough surface morphology remain nearly unchanged after thermal-treatment of films at 150 °C for 24 h. In addition, no cracks were observed in films with thicknesses up to 8.1 μm, exceeding most of polymer and inorganic particle films reported in the literature. The simple and scalable preparation method, low-cost, superhydrophobicity, and excellent thermal stability endow the PDVB colloidal films with promising applications in advanced coating fields, especially when employed in the high-temperature service environment.
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高影响因子
CHEMOSPHERE
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2016
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IF 3.698
Yongzhen Wang,Songquan Wu,Xingru Yan,Tao Ma,Lu Shao,Yuyan Liu,Zhanhu Guo
A series of alkyl bicarbamates supramolecular organogelators were synthesized with different structures and lengths of alkyl chains. The driving forces for the self-assembly of small molecules, including the intermolecular H bonding, π-π stacking and van der Waals interactions, played an important role in the formation of different 3D network structures, i.e., fibers, ribbons, sheets, and prisms. And a probable formation process of the gel networks was proposed. Furthermore, the phase-selective gelling performances were investigated for oil removal from aqueous solution. Interestingly, the gelling properties were found to be affected by the length and structure of alkyl chains, while some gelators with intermediate alkyl chain lengths could effectively gel all the tested oils from water surface within 15 min, such as Russian crude oil, diesel , gasoline, soybean oil, peanut oil, olive oil, cyclohexane , hexane and ethyl acetate. Advantageously, fast gelation , high rate of oil removal (>95%) and excellent oil retention rate (close to 100%) were realized in the recovery of oil spills from water surface. This kind of supramolecular gelators demonstrates good potential applications in the delivery or removal of organic pollution from oil/water mixtures.
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 20
·12283-12291
·
IF 3.108
Yicheng Bi,Hua Zhou,Honghua Jia,Ping Wei
In our study, a polytetrafluoroethylene (PTFE) open-tubular enzyme-immobilized microreactor has been successfully prepared using dopamine polymerization and multi-layer deposition. The polydopamine layer was utilized as a primer layer in the microchannel to provide PTFE surface reactable groups, and polyethylenimine and Candida antarctica lipase B were alternatively adsorbed on the PTFE surface by the layer-by-layer method. The lipase loading kept increasing as the number of layers increased and reached a plateau at the 8th layer. The formation of multilayers and increase of enzyme loading were described and explained by the water contact angle measurement, Fourier transform infrared spectroscopy (FI-IR), and X-ray photoelectron spectroscopy, while the morphological characteristics were observed using Atomic Force Microscopy (AFM) and field emission scanning electron microscopy (FE-SEM). Preparation of a wax ester using the microreactor had much better production efficiency (35 minutes to reach 95% yield) than that using traditional reactors (over 4 hours to complete the reaction). Very excellent stability can be achieved by the microreactor, which could be used for 144 hours with the residual activity remaining at 83% of the initial activity.
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DALTON TRANSACTIONS
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2017
·Vol. 46
·期 14
·4602-4608
·
IF 4.029
Aruuhan Bayaguud,JianDa Li,Shan She,Yongge Wei
A reaction strategy for the post-functionalization of hexavanadate derivatives is presented herein. In this study, five polyoxovanadate-based organic–inorganic hybrids TBA2[V6O13{(OCH2)3CCOO(CH2)15CH3}2] (2), TBA2[V6O13{(OCH2)3CCOO(CH2)8CHCH2}2] (3), TBA2[V6O13{(OCH2)3CCOOCH2CF3}2] (4), TBA2[V6O13{(OCH2)3CCOO(CH2CH2O)3CH3}2] (5), and TBA2[V6O13{(OCH2)3CCOO(CH2)12OH}2]·2CH3CH2OH (6) were successfully synthesized via esterification of carboxylic acid groups-containing TBA2[V6O13{(OCH2)3CCOOH}2] (1) with five alcohols possessing different functional groups. These hybrids were characterized by single crystal X-ray diffraction, IR, ESI-MS, 1H and 13C-NMR spectroscopies, and elemental analysis. Moreover, the formation of large vesicles was observed in a mixed solution of compound 2 due to its surfactant-like structure.
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CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Nan Zhang,Xiaoling Hu,Ping Guan,Chunbao Du,Ji Li,Liwei Qian,Xiaoyan Zhang,Shichao Ding,Bangpeng Li
Design and preparation of functional materials for selective recognition of biomacromolecules such as proteins, DNA, viruses, and bacteria have always been extremely challenging due to their structure sensitivity. Regrettably, the structure stability of biomacromolecules in molecularly imprinted technology was rarely addressed. This paper presents an effective procedure for the facile preparation of bovine serum albumin (BSA) interfacial molecularly imprinted microspheres (IMIMs), using an imidazole-based amphiphilic ionic liquid (IL), which played a dual role of a stabilizer and emulsifier, via miniemulsion polymerization at 25 °C. In order to prove the stabilizing effect of IL on BSA, a conventional emulsifier sodium dodecyl sulfate (SDS), was also used as the emulsifier for comparison. Different characterization methods were employed to investigate the stability of BSA structure and track the experimental process. The results reveal that the destruction of structure of BSA by amphiphilic IL, 1-dodecyl-3-methylimidazolium chloride ([DMM]Cl), was much lower than that by SDS. Moreover, good selectivity of IMIMs-[DMM]Cl towards BSA was certified in the batch-wise and selectivity rebinding tests, in which an imprinting factor of 3.32 was obtained. This was superior to IMIMs-SDS and demonstrated to be a promising platform for recognition of protein with good specificity.
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Journal of the Mechanical Behavior of Biomedical Materials
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2017
·
IF 3.11
Guangmei Huang,Zhiyun Du,Zuoying Yuan,Lihua Gu,Qing Cai,Xiaoping Yang
Biodegradable organic-inorganic composites composed of polylactide (PLA) and hydroxyapatite (HA) are important bone repairing materials, while the dispersibility of nanoscaled HA in PLA and the interfacial adhesion between HA and PLA remained unsatisfactory. In this study, poly(D-lactide) (PDLA) oligomers with different molecular weights were grafted onto HA nanorods (HA-PDLA), and the HA-PDLA hybrids were mixed with poly(L-lactide) (PLLA). Dispersibility of HA-PDLA hybrids in PLLA matrix was investigated, and the formation of PDLA/PLLA stereocomplex at the interface of HA-PDLA and PLLA was studied by characterizations including crystallization, mechanical and thermal properties, taking PLLA grafted HA (HA-PLLA) and unmodified HA as comparisons. Surface grafting of PLLA or PDLA oligomers both significantly improved the dispersibility of HA nanorods in PLLA matrix. Benefiting from PDLA/PLLA stereocomplexation, HA-PDLA could increase the tensile strength and the elongation of resulting PLLA/HA nanocomposites more significantly than HA-PLLA. The interfacial interaction between HA-PDLA and PLLA matrix could be further strengthened by increasing the molecular weights of those grafted PDLA chains on HA, which was verified by changes in crystallization and glass transition behaviors. To sum up, the concept of using PDLA/PLLA stereocomplexation was feasible and effective in preparing PLA-based organic-inorganic nanocomposites targeting bone repairing.
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Small
·
2024
·
IF 13
Kunlin Chen,Jingyu Chen,Changyue Xu,Haie Zhu,Jing Hu,Kejing Yu
High-performance color-changing compounds, recognized as prominent smart materials, dynamically alter their color in response to external environmental stimuli. However, existing compounds exhibit limited responsiveness and color diversity, presenting challenges in the development of textiles responsive to multiple stimuli. This research introduces a novel design for dual-responsive color-changing microcapsules, employing a Pickering emulsion template method. The larger compartment encloses photosensitive dyes, whereas the smaller one contains thermochromic phase-change colorants. Adjusting the density of nanocapsules in the smaller compartment on the microcapsule surface enables a spectrum of colors, including red, yellow, blue, and green, triggered by light and heat. When incorporated into textiles, these microcapsules bestow adaptive color-changing attributes and infrared stealth capabilities onto the fabrics. Additionally, by modulating the color via surface micro/nanostructures, textile surfaces can exhibit hydrophobic and oleophobic properties. Such enhancements extend the textiles’ potential applications in areas like anti-counterfeiting and military operations.
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Journal of Energy Storage
·
2024
·
IF 8.9
Ruizhi Zheng,Renjie Chen,Delong Xie,Xinjie Luo,Yu Wang,Yang Bai,Sihao Yin,Jian Xiang,Hongfei Zhang,Yi Mei
Phosphorus-modified hexadecanol is regarded as a promising heat storage medium for form-stable phase-change materials (FSPCMs) because of its high energy storage density and good thermal stability . In this study, a novel FSPCM was fabricated using phosphorus-modified hexadecanol, 1-oxo-4-hydroxymethyl-2,6,7-trioxa-l-phosphabicyclo [2.2.2] octane (PEPA), and pentaerythritol (PER). Among all the samples, FSPCM (P3), containing 9 % PEPA and 3 % PER, exhibited the optimal thermal storage performance and flame-retardant properties. Its latent heat was 122.5 J/g, and its photo-to-heat conversion efficiency was 61.8 %. The limiting oxygen index of P3 approached 29.5 %, and the UL-94 V -0 rating was attained. The decomposition and fire-retardant mechanism were inferred based on the analysis of char residues and the gaseous phase to determine the interaction between the PCMs and flame retardants.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lei Zhao,Yawen Chen,Qinglin Wei,Xinyi Lv,Ying Cui,Wenjun Wang,Xiaozhou Mou,Xuejiao Song,Xiaochen Dong,Yu Cai
Chemodynamic therapy (CDT) based on nanozyme has attracted extensive attention in the treatment of bacterial infections. However, the catalytic activity of nanozymes and the infection microenvironments severely limit CDT antibacterial efficacy. Herein, a near-infrared-controlled antibacterial nanoplatform (CuFeO x /IR825@PCM) is developed by encapsulating Cu-Fe peroxide nanoparticles (CuFeO x ) and the photothermal agents (IR825) in the thermal-sensitive organic phase change material (PCM). The unique wax sealing property of PCM helps to improve the stability of CuFeO x . After administration, the hyperthermia effect induced by IR825 under near infrared (NIR) irradiation would induce the melting of PCM shell and rapidly release the CuFeO x . In response to the lower pH in the inflammatory microenvironment, CuFeO x nanoparticles (NPs) would be further decomposed to release a large amount of exogenous hydrogen peroxide (H 2 O 2 ), which makes up for the deficiency of limited endogenous H 2 O 2 and improves the performance of CDT. In addition, the low pH of bacterial infection microenvironment resulted in the decomposition of CuFeO x to generate a large amount of Cu 2+ /Cu + , Fe 3+ /Fe 2+ and H 2 O 2 . The released Cu 2+ and Fe 3+ were reduced to Cu + and Fe 2+ by endogenous glutathione (GSH), thus depleting the GSH. With the help of combination therapy of photothermal therapy (PTT) and CDT, in vivo and in vitro experiments proved that CuFeO x /IR825@PCM could effectively destroy the bacterial structure and induce bacterial inactivation with ignored side toxicity.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Miaojia Song,Xinghua Zhang,Qi Zhang,Lungang Chen,Yubao Chen,Jianguo Liu,Longlong Ma
Hydrodeoxygenation of vegetable oils and fats is an effective method for the production of high-quality hydrocarbon fuels. Herein, a series of metallic oxides supported on SAPO-11 were developed for the hydrodeoxygenation of methyl palmitate or palm oil to hydrocarbon fuels under mild conditions. The nitrogen-functionalized bimetallic oxide catalyst (NiO–MoO3@N/SAPO-11) exhibited the highest catalytic activity, obtaining methyl palmitate and palm oil conversion close to 100% and aviation fuel selectivity of 93.14% at 280 °C. In the hydroprocessing of methyl palmitate, the metal Ni and oxygen vacancies produced in situ by partial reduction play an indispensable role in the activation of hydrogen and the adsorption of oxygen-containing functional groups. Moreover, pyridinic-N was introduced to the NiO–MoO3@N/SAPO-11 catalyst, producing a high selectivity for the decarboxylation in the hydroprocessing of methyl palmitate.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 13
·46032
·
IF 1.86
Ming Zhang,Mingqing Chen,Zhongbin Ni
We investigated the rheological behaviors of diglycidyl ether of bisphenol A (epoxy resin) composite pastes with fumed SiO 2 , biscarbamates, and tricarbamates with the same terminal alkyl chains of C 16 , respectively. The rheological measurement results show that the rheological responses of both carbamates in the epoxy composite pastes were stronger than that of fumed silica at the same concentrations, especially at low concentrations, and the rheological behaviors of the epoxy composites with them were thermally reversible and concentration dependent. IR, thermal, differential scanning calorimetry, and polarized microscopic analyses demonstrated that their different excellent rheological responses in epoxy composite pastes came from their different self-assemblies in the epoxy matrix, which were caused by the different intermolecular interactions, mainly including hydrogen-bonding and van de Waals interactions, and the intermolecular interactions for carbamates were closely related to their molecular structures. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46032.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yanshu Xiang,Yongjie Zhao,Yifan Jiang,Jiarui Feng,Xiaoyi Zhang,Wei Su,Yingjie Zhou,Peng Wei,Sze Shin Low,Hao Nan Li
The sophisticated environment of chronic wounds, characterized by prolonged exudation and recurrent bacterial infections, poses significant challenges to wound recovery. Recent advancements in multifunctional wound dressings fall short of providing comprehensive, accurate, and comfortable treatment. To address these issues, a battery-free and multifunctional microfluidic Janus wound dressing (MM-JWD) capable of three functions, including exudate management, antibacterial properties, and multiple indications of wound infection detection, has been developed. During the treatment, the fully soft microfluidic Janus membrane not only demonstrated stable unidirectional fluid transport capabilities under various skin deformations for a longer period but also provided antibacterial effects through surface treatment with chitosan quaternary ammonium salts and poly(vinyl alcohol). Furthermore, integrating multiple colorimetric sensors within the Janus membrane’s microchannels and a dual-layer structure enabled simultaneous monitoring of the wound’s pH, uric acid, and temperature. The monitoring was facilitated by smartphone recognition of color changes in the sensors. In vivo and in vitro tests confirmed the exudate management, antibacterial, and sensing capabilities of the MM-JWD, proving its efficacy in monitoring and promoting the healing of wounds. Overall, this study provides a valuable method for the design of multifunctional wound dressings for chronic wound care.
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