Journal of Water Process Engineering
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2022
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IF 7.34
Yunfen Shi,Yinyan Zhong,Zhong Sun,Xiaozhen Ma,Shuqi Li,Fan Wang,Yupeng An,Qing Luo,Jin Zhu,Jing Chen,Ning Yan
Taking effective measures to remove oil and organic pollutants from water has become a top priority. In this study, we developed a novel superhydrophobic and magnetic lignin-based polyurethane foam for highly efficient adsorption of organic pollutants and removal of viscous crude oil from water. The superhydrophobic bio-based magnetic foam was prepared by the addition of Fe 3 O 4 nanoparticles during the foaming process followed by the immersion in an octadecyltrimethoxysilane (OTMS) solution. After modification by OTMS, the water contact angle (WCA) of the foam adsorbent was increased by 37.1°, exhibiting a high WCA of 156°. Fe 3 O 4 nanoparticles endowed the foam with excellent photo-thermal performance, allowing the efficient adsorption of both crude oil and a wide range of organic solvents. The foam adsorbent had a high adsorption capacity up to 18.8 times of its own weight. The bio-based adsorbent could still retain a high adsorption capacity after over ten cycles. The magnetic property facilitated control and recycling of the foam adsorbent by using a magnetic field. Moreover, the bio-based foam adsorbent was fully degraded in a methanol/sodium hydroxide solution (0.5 mol/L) at 60 °C after 8 h. The outstanding mechanical stability, reusability, and environmental friendliness make these bio-based foam adsorbent highly promising for cleaning up pollutions in water.
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CARBOHYDRATE POLYMERS
·
2022
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IF 10.723
Weidong Niu,Yunfeng Guo,Wei Huang,Lili Song,Zefang Xiao,Yanjun Xie,Yonggui Wang
To promote the replacement of nondegradable petrochemical-based polymers with green polylactic acid (PLA) materials, aliphatic chains-grafted cellulose nanocrystals (ECNCs) were prepared and used as nanofillers to overcome the disadvantage of poor toughness of PLA. ECNCs with core-corona structures were obtained by modifying cellulose nanocrystals (CNC) with valeryl chloride, octanoyl chloride, dodecanoyl chloride, and stearoyl chloride. ECNCs consists of a cellulose crystalline core and a soft esterified corona layer with aliphatic chains. Among the diverse ECNCs, the obtained EOCNC by esterification of octanoyl chloride exhibited most efficient enhancement of the toughness of PLA. Specifically, PLA/EOCNC-1% film displayed the best elongation at breakage of 108%, which was 6.4 times that of pure PLA. The esterified outer layer of ECNCs, which improves the interfacial compatibility, is one of the key factors contributing to toughening of PLA. These ECNCs with core-corona structure open up new directions for the application of PLA advanced composites.
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高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Xiaoli Tang,Zhuqun Wang,Maosen Wang,Shuyu Zhou,Jinghua Chen,Shuqin Xu
Demyelination is a serious complication of neurological disorders, which can be reversed by oligodendrocyte precursor cell (OPC) as the available source of myelination . Chondroitin sulfate (CS) plays key roles in neurological disorders, which still attracted less attention on how CS modulates the fate of OPCs . Nanoparticle coupled with glycoprobe is a potential strategy for investigating the carbohydrate-protein interaction. However, there is lack of CS-based glycoprobe with enough chain length that interact with protein effectively. Herein, we designed a responsive delivery system, in which CS was the target molecule, and cellulose nanocrystal (CNC) was the penetrative nanocarrier . A coumarin derivative (B) was conjugated at the reducing end of an unanimal-sourced chondroitin tetrasaccharide (4mer). This glycoprobe (4B) was grafted to the surface of a rod-like nanocarrier, which had a crystalline core and a poly(ethylene glycol) shell. This glycosylated nanoparticle (N4B-P) displayed a uniform size, improved water-solubility, and responsive release of glycoprobe. N4B-P displayed strong green fluorescence and good cell-compatibility, which imaged well the neural cells including astrocytes and OPCs. Interestingly, both of glycoprobe and N4B-P were internalized selectively by OPCs when they were incubated in astrocytes/OPCs mixtures. This rod-like nanoparticle would be a potential probe for studying carbohydrate-protein interaction in OPCs.
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高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Jie Yu,Zhonghang Chen,Jiefan Zhu,Viachaslau Zhylko,Liyan Dai
The aqueous two-phase extraction process (APTE) was utilized for the extraction of polysaccharides from the fruits of Ilex cornuta (Lindl. et Paxt.) (PFIC). After screening and selection of isopropanol/ammonium sulfate as the aqueous two-phase system, various parameters of crude extract amount, ultrasonic time, extraction temperature and extraction time on the extraction process was investigated in detail and optimized by response surface methodology (RSM). Under the optimal conditions in which crude extract amount was 2.23 g, ultrasonic time was 17.5 min, extraction temperature was 69 °C and extraction time was 1.55 h, the yield of polysaccharides reached 50.87% which was close to the predicted value of 50.78%. Structural features of PFIC were investigated by GPC, GC–MS and FT-IR analysis. And the results indicated that PFIC with a molecular weight of 3.89 kDa was composed of monosaccharides including rhamnose (1.83%), arabinose (11.70%), xylose (3.30%), mannose (3.55%), glucose (61.88%) and galactose (17.74%). The bioactivity experiments showed that PFIC had strong scavenging ability on DPPH radical, fine scavenging ability on hydroxyl radical and certain scavenging ability on superoxide anion radical. Overall, these results suggested that PFIC exhibiting fine to good antioxidant capacities could be potentially developed as a natural antioxidant.
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MOLECULES
·
2023
·Vol. 28
·期 14
·5523
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IF 4.6
Qing Li,Yujuan Guo,Meijia Wu,Fei Deng,Jieying Feng,Jiafeng Liu,Sheng Liu,Chaoliu Ouyang,Wengui Duan,Shunmin Yi,Guangfu Liao
A series of highly fluorinated polyimide/allomelanin nanoparticles (FPI/AMNPs) films were prepared with FPI as the matrix and AMNPs as the filler. Due to the formation of hydrogen bonds, significantly reinforced mechanical and UV-shielding properties are acquired. Stress–strain curves demonstrated a maximum tensile strength of 150.59 MPa and a fracture elongation of 1.40% (0.7 wt.% AMNPs), respectively, 1.78 and 1.56× that of pure FPI. The measurements of the UV-vis spectrum, photodegradation of curcumin and repeated running tests confirmed the splendid UV-shielding capabilities of FPI/AMNPs films. The enhancement mechanisms, such as synergistic UV absorption of the charge transfer complexes in FPI and AMNPs and photothermal conversion, were the reasons for its exceptional UV shielding. The excellent comprehensive properties above enable FPI/AMNPs nanocomposites to be potential candidates in the field of UV shielding.Keywords:polyimide;allomelanin;mechanical properties;UV-shielding properties;nanocomposite
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高影响因子
FUEL
·
2023
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IF 7.4
Linjie Guan,Meiyu Liu,Honghai Liu,Li Zhang,Yiming Zhang,Yucai Qin,Binbin He,Yi Mei,Yun Zu
The regulation of the engineering regionally spatial framework aluminum (Al F ) distribution in MFI channels has been considered as an effective way for the production of light olefins by targeted fluid catalytic cracking (TCO) technology. In this work, ZSM-5 zeolites with controlled Al F distributions are facilely synthesized by tuning the combinations of pentaerythritol (PET), tetrapropylammonium (TPA) and Na cations. The Al F atoms in the prepared HZ5-[PET + Na] and HZ5-[TPA] samples are enriched in the straight channels and intersection channels, respectively, which are favorable to the n-butane monomolecular reaction pathway, promoting the propylene production. Whereas the Al F atoms in the HZ5-[TPA + Na] sample are simultaneously distributed in both the straight and intersection channels, the n-butane molecules preferentially take place monomolecular reaction in the straight channels to generate carbonium ions (e.g., C 2 H 5 + , C 3 H 7 + and C 4 H 9 + ). Subsequently, all of them enter into the intersection channels to induce the occurrence of bimolecular reaction. Such a process is conducive to the formation of ethylene. These insights can help to clarify the catalytic behavior of regional framework acid sites in ZSM-5 channels and then provide an effective approach to design efficient TCO catalysts.
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CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Wei Huang,Xiangyu Tang,Wuming Fan,Qianqian Sun,Yonggui Wang,Zefang Xiao,Yanjun Xie
The development of photothermal materials with high photothermal-conversion efficiencies is important in a range of applications, such as power generation, sterilization, desalination , and energy-production. To date, a few reports have been published related to improving the photothermal conversion performances of photothermal materials based on self-assembled nanolamellae. Herein, hybrid films of co -assembled stearoylated cellulose nanocrystals (SCNCs) and polymer-grafted graphene oxide (pGO)/polymer-grafted carbon nanotubes (pCNTs) were prepared. The chemical compositions , microstructures, and morphologies of these products were characterized, and it was found that the self-assembled SCNC structures exhibited numerous surface nanolamellae due to crystallization of the long alkyl chains. The hybrid films (i.e., SCNC/pGO and SCNC/pCNTs films) consisted of ordered nanoflake structures, confirming the co-assembly behavior of the SCNCs with pGO or pCNTs. The melting temperature (~65 °C) and latent heat of melting (87.87 J/g) of SCNC 1.07 indicate its potential to induce the formation of nanolamellar pGO or pCNTs. Under light irradiation (50–200 mW/cm 2 ), the pCNTs exhibited a higher light absorption capacity than pGO, and as a result, the SCNC/pCNTs film exhibited the best photothermal performance and electrical conversion, ultimately demonstrating its potential for use as a solar thermal device in practical applications.
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高影响因子
JOURNAL OF FOOD SAFETY
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2023
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IF 2.4
Shengjie Li,Feng Cheng,Xueqin Cao,Bakri Mahinur,Maitinuer Maiwulanjiang
As the interest in “natural” and “safe” products grows, the use of natural products instead of synthetic preservatives to combat food spoilage and poisoning caused by microorganisms during processing and storage has become a prioritized option. The present research evaluated the antibacterial activity of the Mentha longifolia L. essential oil (MLEO) against several pathogenic bacteria, and the mechanism of action against methicillin-resistant Staphylococcus aureus (MRSA). Gas Chromatography Quadrupole Time-of-Flight Mass Spectrometry (GC-Q-TOF MS) analysis suggested that main components of MLEO were carvone (47.39%) and limonene (12.48%). The oil showed considerable antibacterial activity with MIC values of 0.394–1.576 mg/mL, and could be a promising bactericide. Non-targeted metabolomics analysis based on GC-Q-TOF MS identified 66 different metabolites, and Kyoto Encyclopedia of Genes and Genomes enrichment analysis of these metabolites revealed that MLEO achieves the effects by affecting amino acid metabolism in MRSA.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-15
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IF 10.2
Zhang Yipeng,Wang Liying,Wang Zi-Dan,Zhou Quan,Zhou Xuefei,Zhou Tianhua,Guan Yi-Xin,Liu Xiangrui
Colon-targeted oral drug delivery systems (CDDSs) are desirable for the treatment of ulcerative colitis (UC), which is a disease with high relapse and remission rates associated with immune system inflammation and dysregulation localized within the lining of the large bowel. However, the success of current available approaches used for colon-targeted therapy is limited. Budesonide (BUD) is a corticosteroid drug, and its rectal and oral formulations are used to treat UC, but the inconvenience of rectal administration and the systemic toxicity of oral administration restrict its long-term use. In this study, we designed and prepared colon-targeted solid lipid nanoparticles (SLNs) encapsulating BUD to treat UC by oral administration. A negatively charged surfactant (NaCS-C12) was synthesized to anchor cellulase-responsive layers consisting of polyelectrolyte complexes (PECs) formed by negatively charged NaCS and cationic chitosan onto the SLNs. The release rate and colon-specific release behavior of BUD could be easily modified by regulating the number of coated layers. We found that the two-layer BUD-loaded SLNs (SLN-BUD-2L) with a nanoscale particle size and negative zeta potential showed the designed colon-specific drug release profile in response to localized high cellulase activity. In addition, SLN-BUD-2L exhibited excellent anti-inflammatory activity in a dextran sulfate sodium (DSS)-induced colitis mouse model, suggesting its potential anti-UC applications.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xinqi Liu,Huiling Yuan,Qian Zheng,Bingyuan Huang,Fang Liao,Hejun Gao,Hongquan Fu,Juan Zhang,Yunwen Liao
The effective capture and storage of radioactive iodine is of great significance to the safe use of nuclear energy. In this study, nitrogen- and oxygen-doped carbon nanotubes acted as effective iodine capture agents in a low concentration of iodine solution of approximately 100 mg L −1 . The iodine uptake capacity is proportionate to hydroxy-functional groups as oxygen species and graphitic nitrogen as nitrogen species, respectively, rather than defects and the specific surface area of carbon nanotubes. The essential adsorption activity of oxygen-doped carbon nanotubes is more than 2.5 times that of nitrogen-doped carbon nanotubes, indicating oxygen-doped carbon nanotubes as a potential carbon material in practical applications for the adsorption of iodine. Theoretical study further deepened the understanding of the iodine adsorption sites on carbon nanotubes. This work provided a new method for the design and synthesis of high-performance radioactive iodine solid adsorbents in the future.
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REACTIVE & FUNCTIONAL POLYMERS
·
2021
·
IF 3.975
Danian Liu,Jingwen Wang,Wenhai Peng,Xinzhu Wang,Hua Ren,Donald W. Kirk
Due to their high density, dielectric ceramics are no longer appropriate for the areas with a light weight demand such as aeronautics, astronautics and wearable devices . In order to meet the ever-increasing demand for lightweight and flexibility dielectric composites, an organic semiconductor material linear polyethylene glycol-polyaniline multi-alternating block (more than triblock) copolymer (with low density) was designed based on the Williamson ether synthesis . FT-IR, 1 HNMR, XRD , DSC and TG results confirmed the success of the synthesis. Its SEBS-based dielectric composites behavior was studied. The results indicated that the copolymer not only possessed a lighter density (~0.9 g/cm 3 ) compared with ceramics (~6–8 g/cm 3 ), but also exhibited better dielectric performances as a dielectric filler. The dielectric constant was 14.52 at a content of 11.5 vol% and the breakdown strength was 33.12 KV·mm −1 , compared to ceramic BaTiO 3 composite having 9.03 and 20.09 KV·mm −1
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Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Mengdie Zhou,Guang Yang,Xiaohua Tian,Songlin Xue,Hao Li,Jianming Pan
Hybrid polymer nanosheets are promising sorbents owing to large surface area, but their complicated synthesis procedure and high cost hinder to apply in particular field of selective separation. In this work, one step Pickering oil-in-water-in-oil (O/W/O) double emulsion (DE) stabilized by palmitic chloride modified halloysite nanotubes (HNTs) were firstly designed for preparing polymer nanosheets (PMBA-PMA) by UV irradiation. Subsequently, amino ethyl benzo-12-crown ether (B12C4-NH 2 ) was covalently immobilized onto the PMBA-PMA to achieve functional hybrid polymer nanosheets (PMBA-PMA-CE) for the effective and selective recovery of lithium ion (Li + ). External metastable W/O interface produced droplets’ coalescence, and the Pickering DE droplets with irregular morphology eventually initiated the formation of polymer nanosheets. PMBA-PMA-CE exhibited cured and nanosheet-like structure constructed by HNTs and polymer networks. The batch mode experiments demonstrated that the fast adsorption equilibrium of PMBA-PMA-CE towards Li + could be reached within 100 min, and the results well followed pseudo-second-order model, confirming the chemical adsorption based on "Size-match" effect. The maximum monolayer adsorption capacity calculated from Langmuir model was 14.67 mg g −1 at 298 K. Benefiting from specific “size-match” complexation, the obtained PMBA-PMA-CE possessed an excellent selectivity towards Li + even in the presence of competitive cations, and selectivity coefficient ( α ) and relative selectivity coefficient ( α r ) were greater than 1.43 and 8.29, respectively. In addition, PMBA-PMA-CE could be simply regenerated and maintained above 90% of the initial capacity after five consecutive adsorption-desorption cycles. Furthermore, the incorporation of cheap HNTs not only endowed one step emulsion DE droplets, but also improved the sorbents’ mechanical property.
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