Materials Today Communications
·
2022
·
IF 3.662
Shaocan Dong,Weiqiu Huang,Xufei Li,Xinya Wang,Baoyou Yan,Zhen Zhang,Jing Zhong
In response to global climate change, most countries have set carbon reduction targets. Mixed matrix membranes (MMMs), which combine the characteristics of inorganic nanofillers and organic matrices, have received wide attentions because of their good permeability and selective performance for the separation of CO 2 from industrial waste gases. However, the poor dispersion, compatibility and interfacial defects often lead to poor gas separation performance. In this paper, according to the dissolution-diffusion and Lewis acid-base theories, inorganic filler of amino-functionalized Bentonite (APTES-Bentonite) with -NH 2 was firstly synthesized to improve the affinity of CO 2 . Then, the dual-functionalized MMMs of APTES-Bentonite/PVDF (A-B/P MMMs) was prepared and adopted for the separation of CO 2 /CH 4 and CO 2 /N 2 , showing the increase of 87.76% and 75.31% compared to the pristine PVDF membrane, respectively. These excellent performances were attributed to the synergistic effect of APTES-Bentonite with -NH 2 groups and PVDF with -F groups, which provide a dual-functional transport pathway for CO 2 molecules due to the interactions of host-guest. Overall, the customized A-B/P MMMs offer superior CO 2 separation performance, which provides some valuable references for large-scale CO 2 capture studies.
研究领域:
材料科学
·
环境工程
·
化学工程
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 35
·21758-21767
·
IF 3.108
Yali Bai,Zhenhuan Li,Bowen Cheng,Maliang Zhang,Kunmei Su
U–TiO2 is successfully coated with SiO2 and subsequently well modified by APTES, and the core–shell structure exists on TiO2@SiO2 and TiO2@SiO2/APTES, which greatly reduces aggregation of the TiO2 nanoparticles. The photocatalytic activities of U–TiO2, TiO2@SiO2, and TiO2@SiO2/APTES are evaluated using MB decomposition. Nearly 50% of the MB is degraded after 15 min in the presence of the U–TiO2 under UV radiation (300 W), and only 17.44% and 4.18% of the MB is degraded in the presence of the TiO2@SiO2-0.6 and TiO2@SiO2/APTES-1. However, TiO2@SiO2/APTES-0.6 and TiO2@SiO2-0.2 exhibit excellent UV absorbance capacities, and the TiO2@SiO2/APTES-0.6 achieves 80% of the UV-shielding ability of U–TiO2. Poly(p-phenylene sulfide) (PPS) is an easily photodegraded material and TiO2/PPS is more seriously photodegraded than PPS, however, the TiO2@SiO2/APTES nanoparticles can effectively protect the PPS from UV degradation, owing to their lower photocatalytic activities, higher UV-shielding abilities and easy dispersion in the PPS matrix. The breaking strength retention rate of the 1 wt% TiO2@SiO2/APTES/PPS film shows a maximum increase of 38.26%, and the breaking elongation retention rate increased by 41.64% at 2 wt% TiO2@SiO2/APTES loading. These results reveal that the incorporation of the TiO2@SiO2/APTES nanoparticles into the PPS matrix imparts excellent anti-UV properties to the PPS matrix, leading to a mechanical performance improvement.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
Materials Horizons
·
2025
·
IF 10.7
Hongfei Liang,Lu Chen,Yang Wu,Youwen Xue,Yuxuan Wang,Wenjie Ji,Huanqi Cao,Qian Zhao,Jian Song,Guoran Li
Luminescence down-shifting technology is increasingly recognized as a crucial option for enhancing the efficiency of silicon solar cells. However, high-quality down-shifting materials, such as perovskite quantum dots, face challenges related to poor thermal stability. These materials tend to agglomerate into larger sizes, leading to the deterioration of the luminescence films at high temperature. Unlike introducing a protecting layer on perovskite quantum dots, we applied 3-aminopropyltriethoxysilane (APTES) as a direct capping agent for perovskite quantum dots in this work to achieve both efficient and stable composite down-shifting films. The interaction between APTES and CsPbBr3 quantum dots is thoroughly analyzed using both experimental measurements and theoretical calculations. Due to the strong interaction between APTES and CsPbBr3, an optimal amount of APTES effectively stabilizes the quantum dots. When mixed with ethylene-vinyl acetate (EVA) copolymer, the strong interaction between APTES and polymer chains could suppress the aggregation of CsPbBr3 quantum dots and inhibit degradation of the composite film under heating. Upon coating on commercial crystalline silicon solar cells, the optimal CsPbBr3 quantum dot/EVA composite film achieves an absolute efficiency by 1.00%, maintaining a 0.81% efficiency improvement even after annealing at 90 °C for 3 hours. In contrast, while the film without APTES shows an efficiency improvement of 0.63% at room temperature but experiences a decrease of 0.23% under the same heating conditions. This work provides a feasible strategy to enhance the thermal stability of CsPbBr3 quantum dot/EVA composite films under high-temperature conditions, offering a promising path toward the commercial application of perovskite-based luminescence down-shifting films in silicon solar cells.
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Xiaoya Ding,Yabei Zhang,Xu Zhang,Guangyu Zhu,Qianyun Tan,Zhiyong Mao,Fuyan Kang,Fa-Qian Liu
To overcome the limitations of traditional corrosion-resistant coatings, which rely solely on passive protection and exhibit poor durability, this study innovatively prepared a multifunctional hybrid filler, halloysite@layered double hydroxide loaded with 8-hydroxyquinoline and functionalized with 3-aminopropyltriethoxysilane (Hal@LDH-8HQ@APTES, HLQA). Specifically, calcined halloysite (Hal) was used as a template to in situ grow layered double hydroxide (LDH) loaded with 8-hydroxyquinoline (8-HQ) corrosion inhibitor, forming the Hal@LDH-8HQ (HLQ) hybrid. Subsequently, 3-aminopropyl triethoxysilane (APTES) was used for surface modification to enhance its interface compatibility with the polymer matrix. The resulting composite coating achieves a dual synergistic protective mechanism: (1) passive protection through physical shielding and prolonging the diffusion path of corrosive media; (2) active protection and self-healing functionality based on the anion exchange properties of LDH, simultaneously achieving chloride ion capture and controlled release of the 8-HQ corrosion inhibitor. Electrochemical impedance spectroscopy (EIS) test results indicate that the HLQA/EP composite coating exhibits outstanding long-term corrosion resistance. After immersion in a 3.5 wt% NaCl solution for 45 days, its low-frequency impedance modulus (|Z| 0.01 Hz ) remains as high as 10 9 Ω·cm 2 . Most importantly, for artificially damaged coatings, after only 12 h of immersion in a 3.5 wt% NaCl solution, the low-frequency impedance values in the damaged areas showed a significant upward trend, strongly validating the self-healing capability of the coating. This study not only significantly enhances the comprehensive protective performance of the coating but also achieves significant progress in realizing an integrated synergistic mechanism of “passive-active-self-healing” for the coating.
研究领域:
材料科学
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表面工程
·
腐蚀防护
·
纳米复合涂层
·
自修复材料
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DOI
高影响因子
TRIBOLOGY LETTERS
·
2021
·Vol. 70
·期 1
·1-16
·
IF 3.106
Sheng Dezun,Yu Hongliang,Li Hongyue,Zhou Jinxi,Zhang Huichen,Wang Weiwei
In this paper, the coupling agent of APTES was employed to improve the lubricating properties of hydrated HEC. The synergistic effect between APTES and HEC was analyzed by means of Raman, FT-IR, and optical observations. The lubricating properties of water, HEC, APTES, and APTES–HEC solutions were separately investigated by the tribological tests with Si 3 N 4 ball and textured Ti–6Al–4V. It was found that APTES can promote the interaction between HEC molecules, resulting in the formation of homogeneous films without clustering, while thickening the solutions. The APTES-enhanced HEC exhibits excellent lubrication behavior with minimal coefficient of friction, which decreases from 0.029 to 0.017 (down by 38%) as friction goes on. In addition, by measuring the wear loss of the balls, it was shown that the mixture of APTES and HEC provided the best anti-wear capability. The film thickness calculated by the Dowson–Hamrock theory matches the trend of the friction coefficient. However, when the friction velocity exceeds a threshold value, the theory is not applicable anymore. The SEM images detected the presence of two structures in the wear area, namely plow and asperity, and suggested two corresponding lubrication states. The hydrodynamic lubrication occurs within the plow. XPS results suggest that APTES can form Si–O–Ti via chemical reaction, which induces the adsorption of APTES–HEC chains onto the asperities of worn Ti–6Al–4V. The adsorption of APTES–HEC produces an adsorbed lubrication layer, which prevents direct contact between the asperities where boundary lubrication occurs. Graphical Abstract
研究领域:
材料科学
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化学工程
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机械工程
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表面科学
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DOI
高影响因子
ACS ES&T Water
·
2022
·
IF 0
Jian Li,Pei Xiao,Jie Yu,Lei Li,Yiyun Zhang,Yun Ma,Fei Liu,Yi Li
Nanofiltration (NF) technology is attractive in desalting and concentrating dyeing wastewater in the textile industry. A highly efficient NF membrane is critical in reducing the cost of the process. Here, a facile and reliable approach to prepare an NF membrane for the selective separation of dye/salt is proposed by surface grafting of 3-aminopropyltriethoxysilane (APTES) on a fresh polyamide (PA) layer after interfacial polymerization (IP). A thin layer of APTES with a thickness of ∼64 nm was found successfully covalently bonded onto the PA surface via esterification and amidation reactions. The thin-film composite (TFC)-1.0 membrane grafted with 10% APTES achieved a high water permeance of 44.8 L m–2 h–1 bar–1, which was 4.7 times higher than that of the control TFC membrane. Interestingly, the rejection of monovalent salt (NaCl, 11.5%) and divalent salt (Na2SO4, 17.2%) decreased significantly, while the rejection for different dyes (Congo red, reactive blue-19, Coomassie blue G-250, and methyl blue) remained over 99.0%. These noticeable changes in separation performances could be attributed to the large pore size of the active layer, resulting from the interference of APTES on the post-cross-linking of a PA network. The poly(ethylene glycol) (PEG) filtration experiments confirmed that the mean pore size of the membrane was enlarged significantly from 0.51 to 1.17 nm after surface modification. Finally, the modified membrane showed good long-term stability and excellent separation efficiencies in fractionation of a high salinity Congo red/NaCl (0.2/50 g L–1) mixture. Overall, this work provides a practical strategy to prepare a permeable and selective NF membrane for dye and salt separation by surface grafting of the nascent PA layer.
研究领域:
膜科学
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环境工程
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材料科学
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化学工程
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产品关联
DOI
Catalysts
·
2020
·Vol. 10
·期 11
·1266
·
IF 3.52
Ting Zou,You-dan Duan,Qiao-e Wang,Hai-ming Cheng
Biodiesel offers an important alternative to fossil fuel. In this work,Eversa Transform2.0 lipase was immobilized onto 3-aminopropyltriethoxysilane (APTES) modified silica clay (SC) by glutaraldehyde. The characteristics of the functionalized supports and the immobilized lipase were investigated by FTIR, TEM, BET, and XRD. The results show that the optimal conditions of lipase immobilization are as follows: 2% glutaraldehyde concentration, 15 mg/mL lipase concentration and incubating at 25 °C for 60 min. The immobilized lipase showed a high tolerance to temperature and pH variation in comparison to the free lipase. The immobilized lipase on SC was applied as a biocatalyst for the synthesis of biodiesel from methanol and canola oil. A biodiesel yield of 86% was obtained at a temperature of 45 °C via a three-step methanol addition. A conversion yield of 67% was maintained after reusing the immobilized lipase for five cycles. This work provides a strategy for the preparation of an efficient biocatalyst for the synthesis of biodiesel.Keywords:lipase;silica clay;biodiesel;immobilization;APTES;glutaraldehyde
研究领域:
生物化学
·
能源科学
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DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2021
·
IF 3.739
Han Wang,Shulan Wang,Jingqiao Zhang,Han Wang,Hui Li,Yi Zhao
Several mesostructured cellular foams (MCFs) were prepared and modified for NO adsorption. TMB, NH 4 F and n -heptane were used as swelling agents, and APTES was used as the modified agent. The morphological structure, chemical composition, thermostability were tested to study the effects of the preparation process on the characterizations of materials. NO adsorption ability of the materials were studied and discussed. NH 4 F and n -heptane had better pore swelling effects compared to TMB, however adding TMB together with NH 4 F and n -heptane could not enlarge the pore structure further. The MCFs materials could keep steady below 800 °C, but after grafting APTES on the surface of the materials, the thermogravimetric curve of materials began to decrease at 300 °C. The materials using NH 4 F and n -heptane as the swelling agents, and modified by APTES had better NO adsorption ability, and the selectivity of the materials were decided by the molecular polarity of the adsorbates. After the modification, the hydrophobic effect of the samples could increase because of the alkyl groups in APTES. The adsorption capacity of the materials could keep steady for ten times without the coexisting component, H 2 O, CO 2 and SO 2 all had negative effects on the regeneration of the 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
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2014
·Vol. 211
·期 7
·1651-1654
·
IF 1.525
Jiaqing Mo,Yajun Liu,Chunliang Liu,Zhenhong Jia
This paper reports on the use of a novel all-porous-silicon configuration consisting of a surface grating and a high-reflectivity quarter-wave stack, arranged as both an all-porous-silicon grating diffractive device, and a highly sensitive and inexpensive biosensor. The diffraction efficiency of the top surface grating in this structure can be considerably improved for biosensing. Moreover, a porous-silicon high-reflectivity multilayer can not only prevent the signal energy from radiating to the substrate, but also increase the internal surface area of the sensing platform for detecting more probing molecules. When 3-aminopropyltriethoxysilane (APTES) was employed as a probing molecule, the sensitivity of the proposed structure increased up to 1 order higher than the porous-silicon diffraction-grating biosensors without a high-reflectivity quarter-wave stack. It has been shown by experimentation that before and after the APTES, −3-order diffraction efficiency changes from 1.30 × 10 −3 to 1.25 × 10 −4 . Excellent agreement is achieved between the experimental results and simulations based on the rigorous coupled-wave analysis.
研究领域:
材料科学
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生物医学工程
·
光学工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Xiao-Wei Luo,Zi-Lu Zhang,Wan-Ting Lin,Wan-Long Li,Si-Yuan Zhang,Zi-Jun Zhang,Jin-Bo Li,Zhi-Kang Xu,Ling-Shu Wan
Thermally stable thin-film composite (TFC) nanofiltration (NF) membranes are essential for high-temperature separation in various industrial applications. Herein, we present a rapid and scalable surface modification of polyvinylidene fluoride (PVDF) ultrafiltration membrane using tannic acid (TA) and 2-aminopropyltriethoxysilane (APTES), which can be used as the substrate membrane for the preparation of thermally stable NF membranes. The modified PVDF substrate shows enhanced mechanical strength and thermal stability, with tensile strength rising from 1.5 to 4.7 MPa, decomposition temperature increasing from 459 to 482 °C, and a coefficient of thermal expansion (CTE) reduced by 36.4%. These improvements ensure the structural integrity and strong adhesion between the substrate and polyamide layers, thereby further improving the reliability of the TFC NF membrane during long-term operation under high-pressure and high-temperature conditions. Consequently, the PVDF-based TFC NF membranes sustain >97.5% MgSO 4 rejection and remarkable water permeance (42.1 LMH/bar) during 100-h operation at 70 °C. This rapid and scalable modification method provides a practical route toward the fabrication of robust PVDF-based TFC NF membranes for high-temperature separation.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yongcong Liu,Qingquan Lin,Guangyong Zeng,Liyi Zhang,Yinjie Zhou,Arijit Sengupta
Nature inspired ‘green’ method has been reported for the fabrication of nanoparticles from the plant derived polyphenol tannic acid (TA) and 3-aminopropyltriethoxysilane (APTES). In present investigation, TA-APTES nanoparticles decorated MXene nanosheets were acted as active layers and TA-APTES@MXene composite membrane were constructed by vacuum self-assembly on cellulose acetate support in order to improve membrane performance. The modified membrane showed an excellent hydrophilicity with a water flux of 5990.11 L·m −2 ·h −1 at 0.1 MPa, which is 15 times higher than pure MXene membrane. Moreover, the removal ratios of three different types of oil/water emulsions (petroleum ether, lubricating oil and vegetable oil) were found to be more than 98%. More importantly, the highly oleophobic membrane surface maintained a relatively high separation performances after four consecutive cycles of performances. This investigation achieves a leap of MXene-based membrane materials from nano- to micro-scale, which provides valuable insights in the field of oil/water separation.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Pingxiao Wu,Yaping Dai,Hang Long,Nengwu Zhu,Ping Li,Jinhua Wu,Zhi Dang
Organo-montmorillonites (organo-Mts) were prepared by grafting with 3-aminopropyl triethoxysilane (APTES), and surface modification which was composed of hexadecyl trimethyl ammonium bromide (HDTMAB) and sodium dodecyl sulfate (SDS) solutions. XRD, BET, FTIR, SEM and Zeta potential analysis were used to characterize the surface and structure properties of the as-obtained products. The XRD and FTIR results showed that APTES was successfully grafted to calcium-saturated montmorillonite (Ca-Mt) and the BET data illustrated that the surface area and microporous volume decreased largely after modification, while the pore diameter increased. Moreover, batch experiments were conducted to investigate the adsorption behavior of Sr(II) on organo-Mts. The experimental results showed that the adsorption capacity of APTES-Mt was 65.6 mg/g, much larger than those of Ca-Mt, SDS-Mt and HDTMAB-Mt (13.23 mg/g, 26.85 mg/g and 3.91 mg/g, respectively) under the chosen conditions. Pseudo-second-order model fitted well with the adsorption kinetic studies for all materials with an equilibrium time of 24 h. Further, the isotherm adsorption could be described well with both Langmuir and DKR models for SDS-Mt, Freundlich model for Ca-Mt and APTES-Mt as well. The Sr(II) removal by Ca-Mt was mainly ion exchange, nevertheless, that by SDS-Mt and APTES-Mt were surface adsorption and ligand adsorption, respectively.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）