CARBOHYDRATE POLYMERS
·
2015
·
IF 4.074
Yuanyuan Yu,Qiang Wang,Jiugang Yuan,Xuerong Fan,Ping Wang,Li Cui
Hydrophobic cotton fabrics were prepared by grafting octadecylamine (ODA) onto cotton fiber surfaces via the laccase/2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) treatment. The cotton fibers were oxidized by laccase/TEMPO to introduce aldehyde groups, which reacted with the amino groups of ODA to form Schiff base. First, ODA was coupled to glucan, used as a model compound of cellulose. The results of FT-IR and MALDI-TOF mass spectroscopy prove the formation of a Schiff base between ODA and glucan. Moreover, the existence of ODA in the grafted cotton fibers was verified by ATR-FTIR, elemental analysis, X-ray photoelectron spectroscopy. Finally, the hydrophobicity of the ODA-grafted cotton fabrics was estimated. The surface hydrophobicity of the cotton fabrics increased after the enzymatic grafting reaction.
研究领域:
材料科学
·
纺织工程
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2015
·
IF 2.467
Chunyan Sun,Feng Zhang,Aili Wang,Shengfang Li,Fangqin Cheng
Aluminum-containing hexagonally ordered mesoporous silica , Al-MCM-41, was successfully synthesized for the first time using natural clay from low-grade potash ores of a salt lake in Qinghai, China, through liquid-phase transport. Synthesis involved the use of impure natural clay, the principal components of which are kaolin and quartz, as a starting material to produce Al-MCM-41 directly without sedimentation processing; no additional silica or aluminum reagents were required in this process. The resultant product was characterized by X-ray fluorescence, X-ray diffraction, Fourier-transform infrared spectroscopy, N 2 adsorption/desorption isotherms, transmission electron microscopy , and 27 Al magic-angle spinning NMR. The adsorption capacity of the final product for removing octadecylamine in synthetic salt lake brine was also investigated. Results suggested that salt lake clay is a promising low-cost precursor for the industrial production of mesoporous aluminosilicate .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 21
·e53875
·
IF 3
Lei Li,Rui Chen,Fengyu Wen,Yashu He,Lin Cheng,Jierun Ma,Jianxin Mu
Oily wastewater has caused serious damage to the human health and ecological environment. It is urgent to develop novel materials for high performance oil/water separation. Porous melamine sponges (MS) are considered as an ideal matrix material for oil/water separation. Herein, molybdenum sulfide (MoS 2 ) modified with tannic acid (TA) and octadecylamine (ODA) was attached to MS framework via a facile dip-coating method. This novel and eco-friendly MS@(MoS 2 @ODA) sponge displays superior superhydrophobicity (WCA = 156.2°) and oil/water separation ability (absorption capacity = 113–145 g g −1 ). MoS 2 @ODA not only enhances surface roughness of MS framework, but also raises its specific surface area, causing an increase in the oil adsorption capacity of MS. Moreover, the composite sponge exhibited excellent chemical and mechanical stability. It is envisioned that this work can demonstrate a facile synthesis strategy for producing environmental friendliness MS with stable superhydrophobicity for high-efficient oil/water separation.
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
CELLULOSE
·
2021
·Vol. 29
·期 2
·1175-1187
·
IF 5.044
Cheng Wei,Liu Wenjing,Wang Qiang,Wang Ping,Zhou Man,Yu Yuanyuan
Antibacterial textiles cannot prevent the dirty liquid containing bacteria from passing through the fabrics to reach the human skin, and cannot effectively protect human health. To enhance the antibacterial function of the fabric, a dual-function cotton fabric with hydrophobic and antibacterial properties, cotton@PDA@AgNPs@ODA, was prepared via in situ surface assembly of polydopamine (PDA), Ag nanoparticles (AgNPs) and octadecylamine (ODA). Polydopamine (PDA) was deposited on raw cotton fabric. AgNPs were introduced to the surface PDA coating of the fabric by in situ reduction of AgNO 3 with reducibility of catechol moieties in PDA. Subsequently, octadecylamine (ODA) was grafted onto PDA by Michael addition/Schiff base reaction. Water contact angle of Cotton@PDA@AgNPs@ODA was 130° at 10 min of drop contact time, showing good hydrophobicity. The antibacterial rates of Cotton@PDA@AgNPs@ODA against Escherichia coli and Staphylococcus aureus were above 99%, and the modified fabric had good bacterial liquid shielding function. Furthermore, the PDA/AgNPs/ODA coating had good fastness under washing, mechanical abrasion and strong acid/alkaline conditions.
研究领域:
纺织材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Energy Reports
·
2022
·
IF 4.937
Lili Jiang,Le Zhao,Guangyuan Chen,Meixia Li,Ruijia Zhang
In this study, octadecylamine/graphite foam composite phase change materials (ODA/GF CPCMs) were prepared by vacuum impregnation; octadecylamine (ODA) was used as the phase change materials (PCMs), and graphite foam (GF) was used as the support material. Polyurethane (PU) foam obtained after hydrolysis in 40 wt% NaOH solution at 80 °C for 30 min was the template for the GF; therefore, the prepared GF has many interpenetrating pore structures, providing many adsorption sites for PCMs. For the ODA/GF-3 CPCMs with 15 wt% graphite addition, the loading of ODA is as high as 92.3%, the thermal stability is excellent, the melting temperature is 52.1 °C, and the latent heat of fusion is 218. 1 J/g, which is 1.1 times that of pure ODA. The thermal conductivity of ODA/GF-3 CPCMs is 0.725 W/m•K, which is 2.2 times that of pure ODA. These results indicate that ODA/GF CPCMs have good thermal properties, and their competitiveness in the field of energy storage is greatly improved due to their excellent performance.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2018
·
IF 4.92
Da-Zhu Chen,Si-Yin Qin,Gary C.P. Tsui,Chak-yin Tang,Xing Ouyang,Jia-hua Liu,Jiao-Ning Tang,Jian-Dong Zuo
The demands for achieving microencapsulated phase-change materials (MEPCMs) with high thermal-energy storage ability have motivated increasing research interest in inorganic filler-modified MEPCMs. However, challenges for such MEPCMs still exist in the pursuit of good compatibility of inorganic particles with the core or shell material. Here, a novel type of octadecylamine-grafted graphene oxide (GO-ODA) -modified MEPCMs using melamine-formaldehyde (MF) resin as the shell material and the mixture of GO-ODA and n -octadecane as the core material was fabricated via in-situ polymerization. The alkylated GO with a thickness of ∼1 nm was confirmed to be highly compatible with the core material. The as-prepared MEPCMs with a regular spherical shape were dispersed without any agglomeration, and the size decreased with increasing the filling amounts of GO-ODA. The incorporation of GO-ODA promoted the crystallization of n -octadecane, resulting in an observable reduction in supercooling degree. The encapsulation efficiency of MEPCMs was calculated to be over 88.0%, and the melting/freezing latent heats reached to a level as high as 207.2 J g −1 and 202.5 J g −1 , respectively, even at a tiny loading level of 0.5%. Besides, the GO-ODA incorporated MEPCMs showed a good thermal cycling stability during a phase change. Moreover, a substantial enhancement in thermal transfer rate and a less marked heating effect for the MEPCMs containing GO-ODA were observed from the thermal conductivity tests and infrared thermography analysis. The findings suggested that the prepared MEPCMs are promising for applications in the fields of thermal energy storage and temperature regulation due to their enhanced thermal transfer performance and prominent phase-change enthalpy.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2019
·Vol. 3
·期 7
·1341-1348
·
IF 0
Jin Zhang,Jianguo Zhao,Wenshan Qu,Zhenxing Wang
Superhydrophobic fabrics with self-healing properties have drawn great attention in industry and daily life. Although many strategies have been reported for preparing superhydrophobic fabrics with self-healing properties, most of them require the usage of a large amount of organic solvents or fluoro-containing agents, which are harmful to the environment and human health. Furthermore, the healing process usually needs an extra heating equipment. However, the amount of vital agents (with low surface energy) loaded on fabrics is still not high enough, which greatly limits the self-healing times and long-term durability. Herein, we prepared superhydrophobic fabrics with outstanding self-healing properties by loading all-water-based octadecylamine@polydopamine core–shell nanospheres. The whole process is environmentally friendly, avoiding the use of harmful organic solvents or fluoro-containing agents. Significantly, due to the favourable photothermal ability of the polydopamine shell, the self-healing process could be realized in sunlight without additional heating treatments, making it more attractive. Moreover, the fabric could maintain superhydrophobicity even after 50 cycles of plasma and heating or 10 cycles of washing and heating treatments owing to the large octadecylamine core, which exhibited excellent durability. Our strategy may open a new avenue to obtain superhydrophobic fabrics with outstanding self-healing properties in sunlight for practical applications.
研究领域:
材料科学
·
环境科学
·
纺织工程
✓ 已验证
产品关联
DOI
Journal of Nanophotonics
·
2018
·
IF 1.06
Jian Yang,Yanjing Li,Bo Jiang,Yunzhi Fu
Silver nanoparticles (Ag NPs) play a significant role in catalysis, biosensor, antibacterial activity, SERS spectroscopy, and photoelectric materials. These prominent applications are strongly dependent on the size and uniformity of Ag NPs. However, a variety of preparation methods such as electrochemical and green synthesis methods are of difficulties to obtain extra-small and uniform Ag NPs due to complex growth environment, which is prone to render anisotropy of nanoparticles thereby limiting the development of Ag NPs. To address the unmet need, tremendous effort has been made synthesizing extra-small Ag NPs with the outstanding monodispersity and remarkable stability in reverse micelles. The efficient and facile method is established employing a high-performance protective agent, i.e., octadecylamine (ODA) with the average diameter of 3.36 ± 1.0 nm. Moreover, by adjusting octadecylamine concentration, the versatile method has the capability of controlling the size of Ag NPs precisely. In addition, the growth mechanism of Ag NPs based on nucleation theory is described schematically, which is of widespread generality to adapt our method for the preparation of other nanoparticles in the similar system. Overall, the promising strategy to the synthesis of extra-small Ag NPs lays a solid foundation for potential applications in wound healing, health care, medical diagnosis, and environmental remediation.
研究领域:
材料科学
·
纳米技术
·
化学合成
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-11
·
IF 5.228
Xue Chao-Hua,Bai Xue,Jia Shun-Tian
A robust, self-healing superhydrophobic poly(ethylene terephthalate) (PET) fabric was fabricated by a convenient solution-dipping method using an easily available material system consisting of polydimethylsiloxane and octadecylamine (ODA). The surface roughness was formed by self-roughening of ODA coating on PET fibers without any lithography steps or adding any nanomaterials. The fabric coating was durable to withstand 120 cycles of laundry and 5000 cycles of abrasion without apparently changing the superhydrophobicity. More interestingly, the fabric can restore its super liquid-repellent property by 72 h at room temperature even after 20000 cycles of abrasion. Meanwhile, after being damaged chemically, the fabric can restore its superhydrophobicity automatically in 12 h at room temperature or by a short-time heating treatment. We envision that this simple but effective coating system may lead to the development of robust protective clothing for various applications.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Taotao Liu,Wenwen Nie,Wei Song,Tong Zhou,Haiying Tang,Xinghai Li,Xuefeng Yu,Guoyu Zhang,Ning Zhao,Changsong Wang
More than 80 % of the potash fertilizer globally is produced by the froth flotation process. Octadecylamine (ODA) and 4-dodecylmorpholine (DMP), the most commonly used flotation collectors, are discharged into salt lakes, posing a hazard to human health and environmental safety. This study investigated ODA and DMP degradation processes under ultraviolet radiation. The experimental results showed that the degradation efficiency of ODA and DMP of 10 ppm reached 100 % within 60 min of UV irradiation in the brine. In contrast, complete degradation in pure water required 80 and 90 min for ODA and DMP, respectively. Notably, salt ions significantly accelerated the degradation of these organic amines compared to pure water. The nitrogen element in both compounds was ultimately converted into ammonium (NH₄⁺). Total organic carbon (TOC) measurements and gas chromatography-mass spectrometry (GC-MS) analyses revealed that the degradation process initiated with the cleavage of C-N bonds, followed by the breakdown of carbon chains. Based on GC-MS data, potential degradation pathways and mechanisms for ODA and DMP were proposed. The possible degradation pathways and mechanisms of ODA and DMP were proposed following GC-MS analyses. Field experiments and the detection of organic compounds in actual brines further validated the photodegradation reactions and mechanisms of the organic amines. This work guides the use of flotation agents and pollution control to produce potassium salts in salt lakes and aids in understanding the degradation processes of organic amines in natural environments.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2021
·
IF 4.872
Yinglei Wu,Tao Sun,Zhongyi He,Xiangqiong Zeng,Tianhui Ren,Erik de Vries,Emile van der Heide
Graphene oxide (GO) underwent a single and double-side modification with octadecylamine (ODA) to MGO1 and MGO2 respectively. MGO1 and MGO2 were incorporated into the O/W base emulsion respectively to change the composition of the boundary layer and the oil phase. It was found that the tribological properties of MGO1-emulsion were better than that of MGO2-emulsion. Chemical composition analysis of the worn surfaces suggests that MGO1 nanosheets might adsorb more easily onto the surface and react better with the bearing steel to produce C–N–O–Fe-containing compounds than do MGO2 nanosheets, and that MGO1 nanosheets were more actively involved in the shear process that occurs in the contact area. SEM and nanoindentation indicated that there was a non-uniform softer MGO1-tribofilm on metal substrate.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Jun Wang,Hui-Ling Duan,Shi-Yao Ma,Jing Zhang,Zhi-Qi Zhang
n-Octadecylamine was adopted as a cleanup agent to develop a novel solidification of a switchable solvent-based QuEChERS method. At higher temperatures (such as 55 °C), n-octadecylamine can melt into a liquid, allowing effective extraction of matrix interferences in acetonitrile solution (i.e., in dispersive liquid–liquid microextraction). At lower temperatures, n-octadecylamine carrying matrix interferences can rapidly solidify and easily separate from the acetonitrile solution. The results demonstrated that n-octadecylamine possessed a better ability to remove matrix interferences and reduce matrix effects than those of traditional solid-phase dispersive extraction cleanup agents of primary secondary amine and octadecyl bonded silica gel. By coupling it with gas chromatography–mass spectrometry, the proposed method was applied to the detection of 16 pesticides in cucumber. The recoveries were from 80.9 to 112.6% with relative standard deviations less than 12.9%. Satisfactory results were also obtained for the detection of 16 pesticides in pear, orange, apple, pepper, lettuce, and tomato.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）