Effect of Ionic Liquid on the Properties of Nanocomposites Based on Epoxy/CNT Hardened with MCDEA

2021 ◽  
Vol 1165 ◽  
pp. 31-38
Author(s):  
Danielle Ferreira dos Santos ◽  
Bluma Guenther Soares
Keyword(s):  
Ionic Liquid ◽  
High Performance ◽  
High Viscosity ◽  
Van Der Waals Interactions ◽  
Great Tendency ◽  
Excellent Performance ◽  
Rigid System ◽  
Dispersion Agent ◽  
Thermal And Electrical Properties ◽  
Diethyl Phosphate

Thermosetting systems based on epoxy resin (RE) with the dispersion of carbon nanotubes (CNT), have been extensively studied by the development of high-performance materials with interesting mechanical, thermal and electrical properties that the thermo-rigid system achieves with the addition of CNT, and thus contribute to obtain composites with excellent performance in low amounts of this filler. However, ensuring a good dispersion of these systems is not easy, as CNTs have a great tendency to cluster due to Van der Waals interactions. To assist in the dispersion of the systems, a phosphonium-based ionic liquid, tributyl (ethyl) -phosphonium diethyl phosphate, acted with a double role, as a dispersion agent and catalyst in systems hardened with MCDEA (4,4’-methylenebis (3 - chloro-2,6-diethylaniline), which is a solid compound giving the systems high viscosity, and with the addition of LI improved the dispersion of the systems, as well as the processability in the preparation of the nanocomposites.

scholarly journals Synthesis of cellulose graft ionic liquid using silanization reaction

2019 ◽  
Vol 22 (2) ◽  
pp. 228-234 ◽  
Author(s):  
Ut Dong THACH ◽  
Thi Lan Nhi Do ◽  
Ngoc Lan Anh Do ◽  
Minh Huy Do
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
High Performance ◽  
High Efficiency ◽  
High Capacity ◽  
High Viscosity ◽  
Batch Adsorption ◽  
Hydroxyl Groups ◽  
Base Catalyst ◽  
Low Efficiency

Introduction: Ionic liquids (ILs) have attached many attentions due to their interesting physicochemical properties. However, ionic liquids have several disadvantages including high viscosity, difficult to purify, separate and recycle, and expensive. Therefore, supported ionic liquids (SIL) have been developed to overcome these problems. SIL based on cellulose material was conventionally synthesized by silanization reaction between ionic liquid trialkoxyl silane and hydroxyl groups on the surface of cellulose. However, low reactivity of cellulose hydroxyl groups causes the low efficiency of silanization reaction. With the aim to resolve these problems and improve the reactivity of cellulose silanization reaction, cellulose graft ionic liquid was synthesized and characterized. Methods: Cellulose graft ionic liquid (CL-IL) material was synthesized by silanization reaction. The influence of reaction condition such as IL/CL (w/w) ratio, base catalyst (NH3) and agent coupling tetraethyl orthosilicate (TEOS) on silanization reaction was investigated. The modified CL-IL materials were characterized using FT-IR, TGA, SEM. The ion exchange properties were evaluated via batch adsorption studies to evidence the efficiency of silanization reaction of cellulose. Results: The study indicated that adding TEOS with NH3 catalyst could significantly increase the number of imidazolium groups grafted on cellulose about 75% compared to the conventional approach. CL-IL material is an efficient anion exchange materials displaying fast kinetic adsorption and high capacity adsorption of MO up to 1.4 mmol g-1. Conclusion: High-efficiency of cellulose silanization was obtained by using coupling agent TEOS and base catalyst. Therefore, the silanization reaction can be used for synthesis divers of functional cellulose materials. This approach can be aimed for the design of cheaper and high-performance materials for catalysis, polymer composite and adsorption in water treatment and depollution of industrial wastewater.  

scholarly journals Towards thermally stable high performance lithium-ion batteries: the combination of a phosphonium cation ionic liquid and a 3D porous molybdenum disulfide/graphene electrode

2018 ◽  
Vol 54 (42) ◽  
pp. 5338-5341 ◽  
Author(s):  
Yu Ge ◽  
Cristina Pozo-Gonzalo ◽  
Yong Zhao ◽  
Xiaoteng Jia ◽  
Robert Kerr ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ionic Liquid ◽  
Lithium Ion Batteries ◽  
Molybdenum Disulfide ◽  
High Performance ◽  
Lithium Battery ◽  
Lithium Ion ◽  
Excellent Performance ◽  
Nanostructured Electrode ◽  
Graphene Electrode

A lithium battery with excellent performance and thermal stability is realized by using a nanostructured electrode and an ionic liquid.

A novel ionic liquid-based monolithic column and its application in the efficient separation of proteins and small molecules by high-performance liquid chromatography

2015 ◽  
Vol 7 (1) ◽  
pp. 218-225 ◽  
Author(s):  
Junxiao Qin ◽  
Ligai Bai ◽  
Jiafei Wang ◽  
Yamin Ma ◽  
Haiyan Liu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
High Performance Liquid Chromatography ◽  
Small Molecules ◽  
High Performance ◽  
Monolithic Column ◽  
High Specific Surface Area ◽  
Excellent Performance ◽  
Efficient Separation ◽  
Porous Monolith ◽  
Separation Of Proteins

Ionic liquid was used to prepare a monolith. The resulting porous monolith had a high specific surface area and was used as the stationary phase for HPLC, showing excellent performance to separate small molecules and protein.

scholarly journals 3D Printing of High Viscosity Reinforced Silicone Elastomers

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2239
Author(s):  
Nicholas Rodriguez ◽  
Samantha Ruelas ◽  
Jean-Baptiste Forien ◽  
Nikola Dudukovic ◽  
Josh DeOtte ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
New Technologies ◽  
Three Dimensional ◽  
High Viscosity ◽  
Layer By Layer ◽  
Silicone Elastomers ◽  
Uv Curable ◽  
Octet Truss ◽  
Tunable Mechanical Properties

Recent advances in additive manufacturing, specifically direct ink writing (DIW) and ink-jetting, have enabled the production of elastomeric silicone parts with deterministic control over the structure, shape, and mechanical properties. These new technologies offer rapid prototyping advantages and find applications in various fields, including biomedical devices, prosthetics, metamaterials, and soft robotics. Stereolithography (SLA) is a complementary approach with the ability to print with finer features and potentially higher throughput. However, all high-performance silicone elastomers are composites of polysiloxane networks reinforced with particulate filler, and consequently, silicone resins tend to have high viscosities (gel- or paste-like), which complicates or completely inhibits the layer-by-layer recoating process central to most SLA technologies. Herein, the design and build of a digital light projection SLA printer suitable for handling high-viscosity resins is demonstrated. Further, a series of UV-curable silicone resins with thiol-ene crosslinking and reinforced by a combination of fumed silica and MQ resins are also described. The resulting silicone elastomers are shown to have tunable mechanical properties, with 100–350% elongation and ultimate tensile strength from 1 to 2.5 MPa. Three-dimensional printed features of 0.4 mm were achieved, and complexity is demonstrated by octet-truss lattices that display negative stiffness.

scholarly journals Enhancing Pervaporation Membrane Selectivity by Incorporating Star Macromolecules Modified with Ionic Liquid for Intensification of Lactic Acid Dehydration

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1811
Author(s):  
Valeriia Rostovtseva ◽  
Alexandra Pulyalina ◽  
Roman Dubovenko ◽  
Ilya Faykov ◽  
Kseniya Subbotina ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Lactic Acid ◽  
Polymer Matrix ◽  
Separation Factor ◽  
Membrane Structure ◽  
High Performance ◽  
Separation Efficiency ◽  
Pharmaceutical Chemical ◽  
Permeate Flux ◽  
Membrane Components

Modification of polymer matrix by hybrid fillers is a promising way to produce membranes with excellent separation efficiency due to variations in membrane structure. High-performance membranes for the pervaporation dehydration were produced by modifying poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) to facilitate lactic acid purification. Ionic liquid (IL), heteroarm star macromolecules (HSM), and their combination (IL:HSM) were employed as additives to the polymer matrix. The composition and structure of hybrid membranes were characterized by X-ray diffraction and FTIR spectroscopy. Scanning electron microscopy was used to investigate the membranes surface and cross-section morphology. It was established that the inclusion of modifiers in the polymer matrix leads to the change of membrane structure. The influence of IL:HSM was also studied via sorption experiments and pervaporation of water‒lactic acid mixtures. Lactic acid is an essential compound in many industries, including food, pharmaceutical, chemical, while the recovering and purifying account for approximately 50% of its production cost. It was found that the membranes selectively remove water from the feed. Quantum mechanical calculations determine the favorable interactions between various membrane components and the liquid mixture. With IL:HSM addition, the separation factor and performance in lactic acid dehydration were improved compared with pure polymer membrane. The best performance was found for (HSM: IL)-PPO/UPM composite membrane, where the permeate flux and the separation factor of about 0.06 kg m−2 h−1 and 749, respectively, were obtained. The research results demonstrated that ionic liquids in combination with star macromolecules for membrane modification could be a promising approach for membrane design.

Ionic liquid-induced low temperature graphitization of cellulose-derived biochar for high performance sodium storage

2021 ◽  
Vol 412 ◽  
pp. 127034
Author(s):  
Yang Yu ◽  
Zhuoya Ren ◽  
Qianqian Shang ◽  
Jiangang Han ◽  
Lei Li ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Low Temperature ◽  
High Performance ◽  
Sodium Storage

scholarly journals Preparation of high-performance toluene adsorbents by sugarcane bagasse carbonization combined with surface modification

RSC Advances ◽  
2020 ◽  
Vol 10 (40) ◽  
pp. 23749-23758
Author(s):  
Yu Wang ◽  
Wangsheng Chen ◽  
Bo Zhao ◽  
Huaqin Wang ◽  
Linbo Qin ◽  
...  
Keyword(s):  
Surface Modification ◽  
Sugarcane Bagasse ◽  
High Performance ◽  
Activated Carbons ◽  
Excellent Performance

A series of activated carbons were prepared by carbonizing sugarcane bagasse combined with surface modification, which showed an excellent performance of adsorbing toluene (522 mg g−1 at 30 °C).

High-performance polymeric ionic liquid–silica hybrid ionogel electrolytes for lithium metal batteries

2016 ◽  
Vol 4 (36) ◽  
pp. 13822-13829 ◽  
Author(s):  
Xiaowei Li ◽  
Sijian Li ◽  
Zhengxi Zhang ◽  
Jun Huang ◽  
Li Yang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid State ◽  
High Performance ◽  
High Capacity ◽  
Electrochemical Stability ◽  
Rate Performance ◽  
Lithium Metal ◽  
Polymeric Ionic Liquid ◽  
Lithium Metal Batteries ◽  
Silica Hybrid

Hybrid ionogel electrolytes have high thermal and electrochemical stability, good ionic conductivity, and potential to suppress Li dendrite formation. Solid-state lithium metal batteries with hybrid electrolytes reveal high capacity and remarkable rate performance.

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