RSC Advances
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2020
·Vol. 10
·期 10
·5648-5655
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IF 3.119
Xinxia Tian,Zhen Cao,Jian Wang,Jiangrong Chen,Yangyang Wei
Thin film nanocomposite (TFN) reverse osmosis (RO) membranes were prepared by dispersing 3-aminopropyltriethoxysilane (APTES) modified hydrotalcite (HT), designated as A-HT, in aqueous solution and incorporating the nanoparticles in polyamide layers during the interfacial polymerization process. Results of Fourier transform infrared spectroscopy and zeta potential characterization showed the successful modification of nanoparticles by APTES. In addition, Fourier transform infrared spectroscopy suggested that amidation would take place between the aminosilane on APTES and trimesoyl chloride in organic solution, providing firm covalent interaction between the nanoparticles and polyamide matrix. Dynamic light scattering and transmission electron microscopy indicated that aminosilane modification improved dispersibility of the nanoparticles in aqueous solution and obtained membranes, which suppressed the aggregation. Both the covalent interaction and aggregation suppression were beneficial to compatibility between nanoparticles and the polyamide matrix. TFN RO membranes incorporated with A-HT demonstrated excellent performance. Compared with the pristine RO membrane, the water flux of A-HT-0.050 prepared with an optimum A-HT concentration of 0.050 wt% was enhanced by 18.6% without sacrificing the salt rejection. Moreover, the selectivity of A-HT-0.050 was superior to that of HT-0.050 prepared with HT of 0.050 wt%, which proved aminosilane modification of hydrotalcite was beneficial to high membrane performance especially to selectivity.
研究领域:
材料科学
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环境工程
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2022
·
IF 10.383
Ziyang Zhou,Abdolvahab Seif,Sepideh Pourhashem,Pier Luigi Silvestrelli,Alberto Ambrosetti,Majid Mirzaee,Jizhou Duan,Alimorad Rashidi,Baorong Hou
Herein, layer-by-layer MXene/graphene oxide nanosheets wrapped with 3-aminopropyltriethoxy silane (abbreviated as F-GO@MXene) are proposed as an anti-corrosion promoter for waterborne epoxies. The GO@MXene nanohybrid is synthesized by a solvothermal reaction to produce a multi-layered 2D structure without defects. Then, the GO@MXene is modified by silane wrapping under a reflux reaction, in order to achieve chemical stability and to create active sites on the nanohybrid surface for reaction with the polymer matrix of the coating. The organic coating modified with 0.1 wt % F-GO@MXene has revealed superior corrosion protection efficiency than the organic coatings modified with either F-GO or F-MXene nanosheets. The impedance modulus at low frequency for the pure epoxy, epoxy/F-MXene, epoxy/F-GO, and epoxy/F-GO@MXene coatings is 4.17 × 105, 5.5 × 108, 4.46 × 108, and 1.14 × 1010 Ω·cm2 after 30 days of immersion in the corrosive media, respectively. The remarkable anti-corrosion property is assigned to the intense effect of the nanohybrid on the barrier performance, surface roughness, and adhesion strength of the epoxy coating. The complemental analysis based on first-principles density functional theory reveals that the adhesion strength related to the silane functional groups in its complexes follows the order F-GO@MXene > F-MXene > F-GO. The enhanced stabilization predicted on the GO@MXene nanohybrid ultimately stems from the combined role of the electrostatic and van der Waals forces, suggesting an increase in the penetration path of the corrosive media.
研究领域:
材料科学
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化学工程
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表面工程
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DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
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2021
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IF 9.381
Mengfan Jing,Lijie Zhang,Zhengbing Fan,Xuyang Liu,Yaming Wang,Chuntai Liu,Changyu Shen
Most cellulose products lack water resistance due to the existence of abundant hydroxyl groups . In this work, microfibrillated cellulose (MFC) was modified via 3-aminopropyltriethoxysilane (APTES)-assisted ball milling . Under the synergism between high-energy mechanical force field and APTES-modification, the fibrillation and hydrophobization of MFC were achieved simultaneously. Free-standing translucent cellulose films made of modified MFC were fabricated. The original crystal form of cellulose is maintained. The hydrophobicity of cellulose film markedly increases and the water contact angle goes up to 133.2 ± 3.4°, which might be ascribed to the combined effects of APTES-modification and rough film surface. In addition, the thermostability and mechanical properties of cellulose film are also improved via mechanochemical modification. This work provides a novel one-step fibrillation-hydrophobization method for cellulose.
研究领域:
材料科学
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化学工程
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PubMed
高影响因子
RSC Advances
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2017
·Vol. 7
·期 84
·53076-53086
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IF 3.108
Xin Jin,Weiquan Cai,Zhijun Cai
Ordered mesoporous alumina (MA) was successfully modified with three amino organosilanes including 3-aminopropyltriethoxysilane (1N), N-(β-aminoethyl)-γ-aminopropylmethylbimethoxysilane (2N) and N-3-trimethoxysilylpropyldiethylenetriamine (3N) via a facile grafting method, and the as-prepared amino organosilane grafted MA–1N, MA–2N and MA–3N show enhanced adsorption performance towards Cr(VI) removal from wastewater. Their physicochemical properties and the MA before modification were comparatively characterized by FT-IR, TEM, XRD, N2 adsorption–desorption, CHNS elemental analysis, zeta potential measurements and XPS. Their adsorption performance was also comparatively studied along with the effect of contact time, adsorption isotherms, multi-metal ion adsorption, interference of co-existing anions and regeneration ability in batch experiments. It was found that their adsorption kinetics data were better fitted by the pseudo-second order model; adsorption isotherms were better described by the Langmuir isotherm for MA–1N, the Freundlich isotherm for MA–2N and the Temkin isotherm for MA–3N. Among them, MA–2N shows the maximum adsorption capacity of 137.9 mg g−1 which is more than twice the 59.4 mg g−1 of MA. The residual concentration of Cr(VI) with a concentration of 50 mg L−1 when treated with MA–2N meets the emission standard of the World Health Organization (WHO). Moreover, MA–2N shows better selectivity toward Cr(VI), and can reduce relatively more Cr(VI) to low toxicity Cr(III). More results were found that Cr(VI) is adsorbed on the surface through a monodentate ligand or bidentate ligand, and then Cr(VI) is reduced to Cr(III) by an adjacent electron donor, after which Cr(III) is co-precipitated with the adsorbents. All the amine-grafted samples show good reusability for 5 cycles. These results indicated that the amino organosilane grafted ordered MA with high adsorption capacity, good selectivity and favourable reusability is a promising candidate for Cr(VI) removal, in combination with its low cost and energy saving preparation process.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED ENERGY
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2024
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IF 10.1
Wenhui Zhang,Hang Zhang,Shuhui Liu,Xingxiang Zhang,Wei Li
A novel sensitive thermo-chromic microcapsules with inorganic/organic nanoparticles-embedded composite shell was designed and synthesized, and the thermal properties, thermo-chromic performance, crystallization behavior of ethyl myristate (EM) in confined spaces were studied in this paper. As the reaction proceeded, the aminated silica (NH 2 -SiO 2 ) nanoparticles modified outer shell in the aqueous phase and isophorone diisocyanate (IPDI) in the oil phase gradually self-assembled at the inner interface, leading to the formation of an inorganic/organic polymers composite shell. The effect of NH 2 -SiO 2 nanoparticles content on the crystallization behavior, microstructure, morphology, and phase-change properties as well as the thermal stability of MPCMs were investigated in detail. Interestingly, the covalent attachment of NH 2 -SiO 2 nanoparticles on the capsules surface offered long-term chemical stability compared to that of conventional physical adsorption. The NH 2 -SiO 2 nanoparticles were found distributed uniformly on the surface of MPCMs, and the onset crystallization temperature of MPCMs increased by 7.3 °C with NH 2 -SiO 2 nanoparticles addition of 15% content, which counteracts the super-cooling phenomenon. Microcapsule temperature change optical microscopy and non-isothermal crystallization kinetics revealed that the crystallization of RS-MPCMs were homogeneous as well. RS-MPCMs have significant potential in green energy applications due to their latent heat storage, thermal stability, thermal conductivity, leakage prevention, and mechanical properties.
研究领域:
材料科学
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化学工程
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Yanni Wang,Yuan Tian,Jiahao Ma,Xiuping Ding,Yabin Wang
To effectively improve performances of silica-based supported catalysts against the aggregation and leaching of anchored metal nanoparticles, functional interfaces have been naturally introduced between SiO 2 substrates and active matters. Regrettably, when mono-, di- and tri-aminosilanes are utilized as interfacial functional layers, their influences on physicochemical properties and catalytic performances of target catalysts have not been contrasted and revealed up to now. In this work, we attempt to explore these effects by selecting commercial aminosilanes with variable aminoalkyl chains inside (mono-, di- and tri-amino groups as 1 N, 2 N, and 3 N) and dendritic mesoporous silica nanoparticles (DMSNs) as supports. Three types of DMSNs-supported palladium catalysts have been conceived, including DMSNs-1N-Pd, DMSNs-2N-Pd, and DMSNs-3N-Pd. Their morphologies, architectures, compositions of crystal phases, surface functional groups, and loading contents of Pd have been compared and the differences have been accordingly explained. The three materials have potentials to function as photocatalysts. Moreover, catalytical performances have been evaluated by Pd-catalyzed Suzuki coupling reaction as the model to reveal the interfacial effects of 1 N, 2 N, and 3 N. Most importantly, this work can guide researchers to reasonably choose mono-, di- or tri-aminosilane with variable aminoalkyl chain in practical applications.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
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IF 6.953
Biyao Geng,Zhengyang Xu,Peng Liang,Jin Zhang,Peter Christie,Hongzhi Liu,Shengchun Wu,Xiaohuan Liu
Designing an environmentally benign bio-adsorbent for the removal of heavy metal ions from aqueous medium was a sustainable strategy to ensure water safety. Herein, three-dimensional macroscopic aminosilyated nanocellulose aerogels (APTM S -modified TO-NFC) for the removal of heavy metal ions in water were successfully synthesized from bamboo-derived TEMPO-oxidized nanofibrillated cellulose (TO-NFC) and aminopropyltrimethoxysilane (APTMs) via a facile freeze-drying process. Owing to a relatively high BET surface area (129.32 m 2 g −1 ), high porosity (99.14%) as well as high substitution degree of amino groups (0.41), the resulting APTM S -modified TO-NFC aerogel exhibited good adsorption capacity of 99.0, 124.5, and 242.1 mg g −1 for Cu 2+ , Cd 2+ and Hg 2+ , respectively. Furthermore, the crosslinked and three-dimensionally porous architecture imparted it with relatively high compression strength, good excellent stability in water, and ease of recyclability from water after the usage. The pH value of the solution had a great influence on adsorption efficiency of the aerogel adsorbent, and optimal adsorption efficiency could be achieved at pH 3–7. Thermodynamic parameters suggested the spontaneous and endothermic nature of adsorption process. This work provides a facile method for preparing sustainable bio-adsorbent for effective heavy metal ions removal from aqueous medium.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 24
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IF 1.86
Xiaoyan Li,Shawei Tang,Xiaoqin Zhou,Shengheng Gu,Kai Huang,Jianjun Xu,Xia Wang,Ying Li
A functional modified montmorillonite (F-OMMT) was prepared by intercalating pristine montmorillonite using phosphonium salt and subsequent grafting through alkyl amino silane coupling. The synergistic effect of F-OMMT on the flame retardancy and char-forming mechanism of intumescent flame-retarded polystyrene- b -(ethylene- co -butylene)- b -styrene (SEBS) composite (SEBS/IFR) was investigated. When 2 wt % F-OMMT was introduced to the SEBS/IFR composite, the limited oxygen index (LOI) value of the composite increased from 24.9% to 26.9%, and the peak heat release rate significantly reduced according to microscale combustion calorimeter (MCC) test. The outer char demonstrated that F-OMMT produced dense and intact nanoparticles with a stabilised graphite structure. Meanwhile, F-OMMT helped form a crosslinking network containing large amounts of P, O, N, and Si in the char layer. Along with IFR, the amino functional group on the clay released nonflammable ammonia in the gaseous phase, the enhanced blowing effect can overcome the high-viscosity resistance of SEBS, more intumescent coating with strengthened clay platelets was then produced. In addition, the tensile properties of SEBS/IFR/F-OMMT composite increased evidently for the good dispersion effect. F-OMMT can serve as an effective and environmentally friendly additive for SEBS/IFR composite. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44953.
研究领域:
材料科学
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阻燃材料
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
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IF 6.14
Tao Zhou,Sheng Huang,Dongjie Niu,Lianghu Su,Guangyin Zhen,Youcai Zhao
Humic substances are produced during the microbial degradation of biomolecules and should be recycled because they are an abundant source of carbon, hydrogen, oxygen, and nitrogen. Herein, (3-aminopropyl)triethoxysilane (APTES) was first used to recover carbon-rich water-soluble humic acid (HA) from wastewater, and the operational parameters (i.e., pH, solution temperature, APTES dosage, reaction time, and initial HA concentration) were optimized for separation efficiency. The results showed that the optimal HA separation efficiency (96.7%) could be achieved at an initial HA concentration of 250 mg/L, APTES dosage 4 mL/L, equilibration time 10 min, pH 3.0, and temperature 35 °C. Furthermore, cations (Mg2+ and Ca2+) led to a remarkable separation of HA, while anions (CO32– and SO42–) weakened the aggregation and deposition of HA. Mechanism analysis unveiled that ladderlike oligomeric aminosilanes (LAOAs) were generated by the hydrolysis, condensation, and self-assembly of APTES. The LAOAs were involved in adsorption bridging action with HA, thus efficiently promoting the precipitation of humic substances. The described carbon separation technique (converting dissolved matter into insoluble substances) can be a promising option for the efficient recovery and reutilization of carbon resources in high-concentration organic wastewater.
研究领域:
环境科学
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废水处理
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DOI
高影响因子
CHEMOSPHERE
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2020
·
IF 5.778
Ding Yu Xing,Yihua Chen,Jiaxin Zhu,Tongzhou Liu
Aminosilane materials, with their low cost and ease of modification, have exhibited great potential for the adsorption of perfluorinated compounds (PFCs) from water. However, this kind of material may be facing two drawbacks during its application: low resistance to hydrolysis and difficulties in separation from the water matrix. This work proposed a strategy of grafting N-(2-aminoethyl) aminopropyltrimethoxysilane (AE-APTMS) on the surface of magnetic γ-Fe 2 O 3 nanoparticles by full utilization of the sorption sites provided by the aminosilane and the magnetism by γ-Fe 2 O 3 . The FTIR and XRD results verified the formation of the magnetic AE-APTMS nanocomposite. The core-shell nanocomposite showed a superparamagnetic property and an isoelectric point at pH = 8.2. Particularly, compared to the aminopropyltriethoxysilane (APTES) nanocomposite, the AE-APTMS nanocomposite exhibited improved hydrolytic stability with 60% less loss of the amine groups during the 48 h adsorption process, as the longer alkyl chain hindered the aminosilane detachment. The AE-APTMS nanocomposite exhibited a rapid adsorption with the removal efficiency of 78% for perfluorooctane sulfonate (PFOS) and 65% for perfluorooctanoate (PFOA) due to the electrostatic interaction and hydrophobic interaction. The regeneration and reuse of the magnetic AE-APTMS nanocomposite were conveniently realized with the removal efficiency higher than 70% for both PFOS and PFOA even after 15 adsorption-desorption cycles. The stable magnetic aminosilane nanocomposite with the ease of separation may provide a new strategy to achieve the economical and effective removal of typical PFCs from water.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
POLYMER
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2021
·
IF 4.43
Hang Jia,Cheng Liu,Yue Qiao,Yu Zhang,Xinxin Dang,Yousi Chen,Xigao Jian
Basalt fiber (BF) reinforced heat-resistant thermoplastic engineering plastic composites exhibit excellent toughness, strength , corrosion resistance , and high- and low-temperature resistance. However, the BF and resin exhibit poor interfacial compatibility resulting in low interfacial strength. Here, mono-, di- and tri-amino silane coupling agents (3-aminopropyltrimethoxysilane, SATMS; N -(2-aminoethyl)-3-aminopropyltrimethoxysilane, DATMS and (3-trimethoxysilylpropyl)-diethylenetriamine, TATMS) were used to treat BF, and composites were then prepared using the modified BF and high-performance thermoplastic poly(phthalazinone ether nitrile ketone) (PPENK). The chemical structures , surface morphologies , roughness and hydrophilicity of the modified BF surface were characterized. In addition, the flexural strength , tensile strength and interlaminar shear strength of BF-DATMS/PPENK composite increased to 1127 MPa, 633 MPa and 55 MPa, which are 18%, 30% and 25% higher than the desized-BF/PPENK, respectively. And the BF-DATMS/PPENK composite exhibited a glass transition temperature ( T g ) of 293 °C higher than those of PPENK (280 °C) and desized-BF/PPENK (285 °C). Results indicated that the interfacial adhesion between BF and PPENK were improved by the amino-silane modified BF, which in turn enhanced the mechanical properties of the corresponding BF/PPENK composites.
研究领域:
材料科学
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复合材料工程
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DOI
高影响因子
WOOD SCIENCE AND TECHNOLOGY
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2022
·Vol. 56
·期 3
·691-702
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IF 2.898
Wang Zhongguo,Zhang Xiong-Fei,Ding Meili,Yao Jianfeng
Wood sponges obtained by structure-retaining delignification of natural wood sheets are promising for CO 2 storage. Herein, lignin in balsa wood is selectively removed through chemical treatment, leading to a highly porous structure. To boost the CO 2 adsorption capacity, amine agents are grafted on the delignified wood via a condensation reaction. The resulting amine-grafted wood sponges exhibit hierarchical porosity and are mechanically resilient. A relatively high CO 2 uptake of 1.22 mmol g −1 (25 °C, 1 bar) is achieved due to the physisorption of hierarchical pores and chemisorption of high amine group loading. Such amine-grafted wood sponges fabricated from top-down strategy hold great potential to serve as renewable CO 2 capture materials.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）