INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Lingling Guo,Jiang Pan,Min Yao,Dawei Gao,Ling Lin,Yu Ren,Zhenming Qi,Chunxia Wang
This study aims to develop a self-dispersive and reactive carbon black (DRCB) to improve its application in cotton fabric. CB was functionalized with γ-aminopropyl triethoxysilane (KH550) and then grafted with as-synthesized compound to obtain aqueous phase DRCB. FTIR analysis confirmed the successful grafting of as-synthesized compound onto KH550-modified CB surface. The weight grafting of DRCB on DRCB-15 % dyed cotton fabric was approximately 15.18 %, with a half weight grafting time of around 17 min. TEM observation demonstrated that DRCB had a core-shell structure with the mean sizes of 36.02 ± 4.30 nm. Particle size analysis revealed that DRCB had smaller average aggregate size of 110.3 nm and higher zeta potential of −33.7 mV than CB, indicating that DRCB had much better dispersion in aqueous media than CB. Cotton fabric was effectively dyed with DRCB, providing excellent color depth of 60 (K/S value) with dry rubbing and wet rubbing/washing color fastness of Grade 4 and Grade 3, respectively. DRCB dyed cotton fabric exhibited outstanding anti-UV and anti-static properties, with no significant difference in softness and tensile property before and after dyeing. This research proposed a new method to solve nanoparticle agglomeration and prepare textile dyes with excellent self-dispersivity and reactivity.
研究领域:
材料科学
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纺织工程
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
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2011
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IF 1.472
Xinghong Zhang,Yang Hou,Ping Hu,Wenbo Han,Junting Luo
The dispersion and co-dispersion behavior of ZrB 2 and SiC nanopowders in ethanol solution was studied by sedimentation test, particle size measurement and transmission electron microscope (TEM) analysis. The dispersion behavior of ZrB 2 and SiC nanopowders in ethanol solution was strongly dependent on the pH values, types and amounts of dispersant. PEI was found to be effective for the dispersion of both ZrB 2 and SiC nanopowders in ethanol solution. With the addition of PEI, the isoelectric points of ZrB 2 and SiC nanopowders in ethanol solution were at pH 10 and pH 9.5, and shift to pH 13 and pH 12.3, respectively. The stability of ZrB 2 suspension increased with the dispersant content increasing until reached 0.7 wt% and well-dispersed SiC slurry can be obtained with more than 2.5 wt% PEI. The suitable pH value for the dispersion of ZrB 2 and SiC nanopowders should be lower than 12 and 10, respectively. The well co-dispersed ZrB 2 and SiC nanocomposite powders can be achieved by using 1 wt% or more PEI below pH 10.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
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2021
·Vol. 13
·期 2
·183
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IF 4.329
Xiaoyan Liu,Handuo Jie,Ruidan Liu,Yanqi Liu,Tianyu Li,Kai Lyu
Due to its special two-dimensional lamellar structure, graphene possesses an excellent shielding effect, hydrophobic characteristics and large specific surface area, which can effectively isolate the internal structure from the external corrosive media. However, lamellar graphene is easy to stack and agglomerate, which limits its anti-corrosion performance. In this paper, cerium oxide-graphene oxide (CeO2-GO) nanocomposites were prepared by a hydrothermal synthesis method. Field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) were applied for microstructure examination, showing that a large number of nanoscale granular cerium oxide grew on the lamellar graphene oxide surface, which improved the dispersion performance of graphene inside the matrix. The anti-corrosion properties of the coating were analyzed and illustrated by open circuit potential (OCP), frequency response analysis, Tafel curve and Mott–Schottky curve. The results indicated that the CeO2-GO (4:1) nanocomposite not only eliminated the agglomeration of graphene to some extent, but also prepared the graphene epoxy coating with good dispersion, which further promoted its anti-corrosion performance. The paper proposed a feasible solution for GO dispersion in cement-based materials and lays a solid theoretical foundation for the engineering application of cerium oxide-graphene oxide modified anticorrosive coating.Keywords:CeO2;GO;CeO2-GO;dispersion;anti-corrosion performance
研究领域:
材料科学
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腐蚀与防护
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
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2024
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IF 3.8
Ke Wang,Xiaoyan Sun,Fayong Li,Dong Xie
Biodegradable films mitigate plastic pollution but often lack UV-aging resistance, shortening their lifespan. While anti-aging additives can boost the films' durability, small molecule migration constrains the extension of their service life. This study introduces a straightforward solid-phase reaction for producing carbon black (CB) grafted with the UV absorber UV531, termed CB-UV531. This material was then blended with the biodegradable polymer PBAT and transformed into a film via blow molding, yielding a durable UV-resistant biodegradable film (PBAT/CB-UV531). This solid-phase grafting reaction does not require any solvents, thereby reducing solvent contamination and waste, and it is simple to operate, allowing for scalable production. Compared to the unmodified CB, the obtained CB-UV531 exhibits significantly improved thermal stability, which can effectively reduce the loss of UV531 during the subsequent high-temperature film-blowing process. Furthermore, the chemically bonded UV absorber on the surface of CB-UV531, coupled with its reduced particle size, promotes enhanced dispersibility and consistent stability within the PBAT/CB-UV531 film, markedly improving its long-term resistance to UV aging. This method is expected to enhance the anti-aging effects of various commercial light stabilizer additives and can be used to extend the lifespan of different biodegradable materials. Highlights A simple solid-phase reaction method was developed to prepare CB-UV531. CB-UV531 reveals smaller size and superior dispersibility. Biodegradable PBAT/CB-UV531 film was prepared via a blowing process. UV531 migration loss in PBAT/CB-UV531 film is significantly reduced. PBAT/CB-UV531 film shows enhanced thermal stability and aging resistance.
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
LANGMUIR
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2010
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IF 3.898
Ming Fang,Jiang Long,Weifeng Zhao,Liwei Wang,Guohua Chen
Homogeneous aqueous suspensions of graphene have been prepared by chemical reduction of graphene oxide in the presence of chitosan. The graphene sheets in thus prepared suspensions can be switched reversibly between a well dispersed and a more aggregated state with pH as a stimulus.
研究领域:
材料科学
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生物医学工程
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DOI
PubMed
高影响因子
FERROELECTRICS
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2018
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IF 0.728
Yuguo Zhuo,Jun Liu,Qingshan Li
Nano-TiO2/MDI-50 based waterborne polyurethane composites were prepared with MDI-50, polypropylene glycol (PPG) and nano-TiO2 as main materials. Nano-TiO2 was modified using r-aminopropyltriethoxysilane (KH550) as modifier in order to improve the dispersion of nano-TiO2 in WPU. The composites morphologies and physical states were investigated using scanning electron microscopy (SEM), thermogravimetry analysis (TG), fourier transform infrared (FTIR) spectroscopy and UV-visible (UV-Vis) spectroscopy. Scanning electron microscopy observations revealed that modified nano-TiO2 has good dispersibility. Results from FTIR and TG suggested that the modified nano-TiO2 had been successfully introduced to the polyurethane molecular chain and the thermal decomposition temperature of nano-TiO2/MDI-50 based waterborne polyurethane composites doubled under the same thermal weight loss. Results from UV-Vis suggested that when 2% of modified nano-TiO2 was added, maximum absorbance of composites were significantly improved and was twice higher than that of pure waterborne polyurethane.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
·
IF 4.2
Xuan Tang,Ming Wang,Bingjing Tang,Yunkun Zhao,Wangcheng Zhan,Yanglong Guo,Li Wang,Sheng Dai,Yun Guo
Realizing the potential benefits of nanoscale metal catalysts requires highly dispersed active sites and control of their local environment. Herein, we develop a catalyst synthesis route for manipulating the local environment of highly dispersed metal-active sites via the targeted deposition of Pd near highly dispersed ZrOx on ZSM-5 zeolite using electrostatic interactions. The formed heteroatom Pd-ZrOx in zeolite catalysts is characterized by scanning transmission electron microscopy (STEM), in situ infrared spectroscopy, temperature-programmed desorption (TPD) of O2, and temperature-programmed surface reaction (TPSR) of CH4. The combination of diverse characterization results demonstrates the heteroatom Pd-ZrOx species rendering a higher dispersion and lower oxygen coordination of Pd species, appropriately tuning the strength of Pd–O bonds, and providing abundant active oxygen species to accelerate the dissociation of CH4. Therefore, the catalytic performance of Pd species is effectively enhanced with the lowest temperature of 90% CH4 conversion decreasing from 390 °C (without ZrOx) to 340 °C. Our work provides a strategy of engineering to anchor highly dispersed noble metal species and regulate the local environment to tune catalytic properties.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Zehua Zhang,Yiyuan Zou,Zhiling Tang,Haoran Luo,Yun Zhou,Jia Chen,Guohua Zhao
Monoglycerides are widely used in flour-based products, but the roles of their dispersibility and acyl chain length remain unclear. This study investigated the effects of monoglycerides with different chain lengths (C12, C16, C18) dispersed in deionized water (DW) or 95 % ethanol (EE) on fresh noodle quality. Ethanol (2 mL per 200 g flour) had no significant effect on noodle properties, but monoglycerides in EE significantly altered gluten structure through covalent and non-covalent interactions, forming a denser gluten network, as observed by CLSM. Starch-lipid complex formation was confirmed by FT-IR, Raman, and XRD, enhancing cooking and immersion performance. Monoglycerides in EE were more effective than in DW, with impact orders: DW (C12 > C16 ≈ C18) and EE (C12 < C16 < C18), indicating solvent selection was more critical than chain length. This study refined the application method of monoglycerides, enhancing their functional performance and contributing to elevated noodle performance.
研究领域:
食品科学
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化学
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产品关联
DOI
PubMed
高影响因子
Frontiers of Materials Science
·
2020
·Vol. 14
·期 2
·198-210
·
IF 1.747
Zhang Jinxing,Hu Kexing,Ouyang Qi,Gui Qilin,Chen Xiaonong
Good dispersibility of graphene in a medium or matrix is a critical issue in practical applications. In this work, graphene was functionalized using N-(4-hydroxyl phenyl) maleimide (4-HPM) via the Diels—Alder (DA) reaction by a one-step catalyst-free approach. The optimal reaction condition was found to be 90 °C for 12 h using dimethylformamide (DMF) as the solvent. FTIR, Raman spectroscopy, XPS and EDS proved that 4-HPM moieties were successfully grafted onto the surface of graphene. UV-vis and TGA confirmed that the grafting amount of 4-HPM was 3.75%–3.97% based on the mass of graphene. Functionalized graphene showed excellent dispersion stability when dispersed in common solvents such as ethanol, DMF, water, tetrahydrofuran and p-xylene. Meanwhile, functionalized graphene also exhibited pH sensitivity in aqueous due to the phenolic hydroxyls from the 4-HPM moieties. As a result of good dispersion stability and pH sensitivity, compared with graphene, functionalized graphene had better adsorption capacity for methylene blue (MB) from aqueous solution.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
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2022
·
IF 9.336
Hualin Dong,Peng Wang,Zongyun Yang,Ru Li,Xinglian Xu,Juan Shen
Ultrasound has a recognized ability to modulate the structure and function of proteins. Discovering the influential mechanism of ultrasound on the intramolecular interactions of egg-white protein isolate–curcumin ( EPI –Cur) nanoparticles and their intermolecular interaction during freeze drying and redispersion is meaningful. In this study, under the extension of pre-sonication time, the protein solubility, surface hydrophobicity, and curcumin encapsulation rate showed an increasing trend, reaching the highest value at 12 min of treatment. However, the values decreased under the followed extension of ultrasound time. After freeze drying and redispersion were applied, the EPI –Cur sample under 12 min of ultrasound treatment exhibited minimal aggregation degree and loss of curcumin. The retention and loading rates of curcumin in the lyophilized powder reached 96 % and 33.60 mg/g EPI , respectively. However, under excessive ultrasound of >12 min, scanning electron microscopy showed distinct blocky aggregates. Overexposure of the hydrophobic region of the protein triggered protein-mediated hydrophobic aggregation after freeze drying. X-ray diffraction patterns showed the highest crystallinity, indicating that the free curcumin-mediated hydrophobic aggregation during freeze drying was enhanced by the concentration effect and intensified the formation of larger aggregates. This work has practical significance for developing the delivery of hydrophobic active substances. It provides theoretical value for the dynamic dispersity change in protein-hydrophobic active substances during freeze drying and redissolving.
研究领域:
食品科学
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生物化学
✓ 已验证
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Xiaoyu Mao,Yi He,Changhua Li,Hongjie Li,Rui Gou,Haitao Liu,Yang Zhao,Wen Chen,Jing Yan,Xi Yuan,Guiyang Wu
Improving the dispersibility and compatibility of nanomaterials in water-borne epoxy resins is an important means to improve the protection ability and corrosion resistance of coatings. In this study, glycine-functionalized Ti3C2Tx (GT) was used to prepare an epoxy composite coating. The results of Fourier transform infrared spectroscopy and X-ray diffraction showed that glycine was successfully modified. The scanning electron microscopy and transmission electron microscopy results showed that the aggregation of Ti3C2Tx was alleviated. Electrochemical impedance spectroscopy test results show that, after 60 days of immersion, GT coating still shows the best protection performance, and the composite coating |Z|f = 0.01 Hz is 3 orders of magnitude higher than that of the pure epoxy coating. This is mainly because, after adding glycine, the −COOH group on the surface of glycine binds to the −OH group on the surface of Ti3C2Tx, improving the aggregation of Ti3C2Tx itself. At the same time, the −NH group of glycine can also participate in the curing reaction of epoxy resin to strengthen the bonding strength between the coating and the metal. The good dispersion of GT in epoxy resin makes it fill the pores and holes left by epoxy resin curing and strengthen the corrosion resistance. The easy availability and green properties of glycine provide a simple and environmentally friendly method for the modification of Ti3C2Tx.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Fangzheng Xi,Yunfa Si,Zibo Chen,Shaowen Cao,Geng Wu,Peng Li,Bo Liu,Cheng Chen,Daping He
Ti3C2Tx MXene’s industrial adoption is hindered by its instability in humid environments and poor dispersion in nonpolar processing solvents, while conventional surface functionalization strategies severely degrade its high electrical conductivity. Herein, we address this challenge through a ligand engineering strategy using phosphate-grafted organic ligands with tailored chain lengths. Among these, phenylphosphonic acid (PhPA) is identified as the optimal ligand, enabling stable dispersion of Ti3C2Tx in 13 organic solvents (spanning from polar to nonpolar) while retaining 47.8% of pristine conductivity (14.38 × 104 S m–1), which is a significant improvement over existing methods. The PhPA-modified Ti3C2Tx exhibits exceptional environmental stability, maintaining 93% of its electromagnetic interference shielding efficiency after 180 days in humid air and showing resistance to degradation in strong alkali, seawater, and thermal exposure up to 200 °C. Mechanistic studies reveal that minimal interlayer expansion reduces electron hopping barriers and interfacial resistance, while π-electron interactions between benzene rings and the Ti–O–P covalent network create electron highways that enhance charge transfer and suppress oxidation. This work provides a rational ligand design principle to optimize MXene stability and conductivity in organic solvents, thereby advancing their applications in energy storage and electronics.
研究领域:
材料科学
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纳米技术
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）