scholarly journals Surface modification of recycled coir fibers with hybrid coating and its effect on the properties of ABS composites

2021 ◽  
Author(s):  
Cai Jiafeng ◽  
Qiuying Li ◽  
Chifei Wu
Keyword(s):  
Tensile Strength ◽  
Surface Modification ◽  
Bending Strength ◽  
Raw Materials ◽  
Sol Gel ◽  
Fiber Surface ◽  
Dip Coating ◽  
Hybrid Coating ◽  
Single Fibers ◽  
Coir Fibers

Abstract In this work, a hybrid coating (TSMA) was produced using tetraethyl orthosilicate (TEOS)/KH550/Styrene maleic anhydride copolymer (SMA) as raw materials. The coating was afterwards applied to modify recycled coir (r-coir) fibers via dip-coating. R-coir fibers reinforced ABS composites were then prepared and the reinforcing effect of fibers on the composite structure was investigated, as well. The r-coir fibers coated with TSMA were hydrolyzed in air for 3 days. The SiO2 particles produced by sol-gel reaction of TEOS were used to connect KH550 and SMA to the surface of the fibers and form an organic-inorganic ‘armor’ structure. The successful surface modification of the r-coir fibers was proved via FTIR spectroscopic study and the improvement of their decomposition temperature was evidenced by TGA. Furthermore, the homogeneous dispersion of TSMA on the surface of r-coir fibers was observed via SEM. In addition, the tensile strength of single fibers was found to increase by 36.1%. According to the results, TSMA can be successfully homogenized on the fiber surface, enabling one to repair the damaged areas and improve the tensile strength of single fibers. Besides, good compatibility between r-coir fibers and ABS was revealed by contact angle measurements. Furthermore, the bending strength and elastic modulus of TSMA-modified r-coir fibers/ABS composites were improved by 6% and 27%, respectively. Therefore, the method of plant fiber modification proposed in present work provides a reliable way for effective reuse of r-coir fibers.

Preparation, characterization, and biocompatibility of different metal oxide/PEG-based hybrid coating synthesized by sol–gel dip coating method for surface modification of titanium

2019 ◽  
Vol 130 ◽  
pp. 206-213 ◽  
Author(s):  
José Carlos Bernedo Alcázar ◽  
Rafaela Moreira Javier Lemos ◽  
Marcus Cristian Muniz Conde ◽  
Luiz Alexandre Chisini ◽  
Mabel Miluska Suca Salas ◽  
...  
Keyword(s):  
Surface Modification ◽  
Metal Oxide ◽  
Sol Gel ◽  
Dip Coating ◽  
Hybrid Coating ◽  
Coating Method ◽  
Dip Coating Method ◽  
Modification Of Titanium

scholarly journals Biocomposite of Cassava Starch Reinforced with Cellulose Pulp Fibers Modified with Deposition of Silica (SiO2) Nanoparticles

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Joabel Raabe ◽  
Alessandra de Souza Fonseca ◽  
Lina Bufalino ◽  
Caue Ribeiro ◽  
Maria Alice Martins ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Sol Gel ◽  
Fiber Surface ◽  
Sio2 Nanoparticles ◽  
Thermoplastic Starch ◽  
Cassava Starch ◽  
Sem Analysis ◽  
Pulp Fibers ◽  
Moisture Adsorption ◽  
Cellulose Pulp

Eucalyptuspulp cellulose fibers were modified by the sol-gel process for SiO2superficial deposition and used as reinforcement of thermoplastic starch (TPS). Cassava starch, glycerol, and water were added at the proportion of 60/26/14, respectively. For composites, 5% and 10% (by weight) of modified and unmodified pulp fibers were added before extrusion. The matrix and composites were submitted to thermal stability, tensile strength, moisture adsorption, and SEM analysis. Micrographs of the modified fibers revealed the presence of SiO2nanoparticles on fiber surface. The addition of modified fibers improved tensile strength in 183% in relation to matrix, while moisture adsorption decreased 8.3%. Such improvements were even more effective with unmodified fibers addition. This result was mainly attributed to poor interaction between modified fibers and TPS matrix detected by SEM analysis.

Synthesis and Characterization of Y2O3:Eu3+ Film Derived by Sol-Gel Processing

2007 ◽  
Vol 336-338 ◽  
pp. 593-596
Author(s):  
Chun Yang ◽  
Jun Ying Zhang ◽  
Hai Bing Feng ◽  
Wei Chang Hao ◽  
Tian Min Wang
Keyword(s):  
Raw Materials ◽  
Sol Gel ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Dip Coating ◽  
Organic Additive ◽  
Excitation Spectra ◽  
Excitation Peak ◽  
Close Relationship ◽  
Dip Coating Technique

Y2O3:Eu3+ thin film was synthesized by sol-gel method with inorganic salt raw materials, and the crystal structure and luminescent properties were investigated. By adding organic additive to the sol, a homogeneous film with high luminescent intensity could be obtained by dip-coating technique on the surface of alumina sheet and quartz glass. Structures of the films were studied by XRD and SEM. The excitation spectra of the films showed a wide excitation peak from 200nm to 260nm, and the emission spectra had a strongest emission peak at 611nm which revealed a close relationship with the calcining temperature.

scholarly journals Surface Modification of PET Fiber with Hybrid Coating and Its Effect on the Properties of PP Composites

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1726 ◽  
Author(s):  
Yapeng Mao ◽  
Qiuying Li ◽  
Chifei Wu
Keyword(s):  
Surface Modification ◽  
Bending Strength ◽  
Dip Coating ◽  
Mechanical Analysis ◽  
Single Fiber ◽  
X Ray Diffraction ◽  
Fiber Modification ◽  
The Matrix ◽  
Potential Applications ◽  
Pp Composites

Surface modification fundamentally influences the morphology of polyethylene terephthalate (PET) fibers produced from abandoned polyester textiles and improve the compatibility between the fiber and the matrix. In this study, PET fiber was modified through solution dip-coating using a novel synthesized tetraethyl orthosilicate (TEOS)/KH550/ polypropylene (PP)-g-MAH (MPP) hybrid (TMPP). The PET fiber with TMPP modifier was exposed to the air. SiO2 particles would be hydrolyzed from TEOS and become the crystalline cores of MPP. Then, the membrane formed by MPP, SiO2 and KH550 covered the surface of the PET fiber. TMPP powder was investigated and characterized by fourier transform infrared spectroscopy, scanning electron microscope (SEM) and thermogravimetric analysis (TGA). TMPP-modified PET fiber was researched by X-ray diffraction and SEM. Furthermore, tensile strength of single fiber was also tested. PET fiber/PP composites were studied through dynamic mechanical analysis and SEM. Flexural properties of composites were also measured. The interfacial properties of PET fiber and PP matrix were indirectly represented by contact angle analysis. Results showed that the addition of TEOS is helpful in homogenizing the distribution of PP-g-MAH. Furthermore, TMPP generates an organic-inorganic ‘armor’ structure on PET fiber, which can make up for the damage areas on the surface of PET fiber and strengthen each single-fiber by 14.4%. Besides, bending strength and modulus of TMPP-modified PET fiber-reinforced PP composite respectively, increase by 10 and 800 MPa. The compatibility between PET fiber and PP was also confirmed to be increased by TMPP. Predictably, this work supplied a new way for PET fiber modification and exploited its potential applications in composites.

Preparation of TiO2 Thin Films Using Inorganic Peroxo Titanic Complex and Autoclaved Sols as Precursors

2007 ◽  
Vol 280-283 ◽  
pp. 809-812 ◽  
Author(s):  
Lei Ge ◽  
Ming Xia Xu ◽  
Lei E ◽  
Yu Ming Tian ◽  
Hai Bo Fang
Keyword(s):  
Thin Films ◽  
Raw Materials ◽  
Sol Gel ◽  
Dip Coating ◽  
Ammonia Solution ◽  
Titanium Oxides ◽  
Titanyl Sulfate ◽  
Transparent Liquid ◽  
H2o2 Solution ◽  
Dip Coating Technique

A new sol-gel method was introduced to prepare titanium oxides (TiO2) photocatalytic thin flms using peroxide (H2O2) and titanyl sulfate (TiOSO4) as raw materials. The TiOSO4 solution was recipitated by adding ammonia solution, then peptized with 30% H2O2 solution to get a yellow, table, neutral, and transparent liquid (peroxo titanic complex sol). When the peroxo titanic complex sol was autoclaved above 80°C for 2h, it changed to a stable, semitransparent sol containing eedle-like, ultra-fine anatase crystals less than 20nm in diameter. Titanium oxide (anatase) films sed for photocatalysis can be prepared on substrates by a dip-coating technique using peroxo titanic omplex and autoclaved sols.

A Composite Film of V2O5 and Multiwall Carbon Nanotubes as Cathode Materials for Lithium-Ion Batteries

2013 ◽  
Vol 537 ◽  
pp. 169-173
Author(s):  
Xiao Wei Zhou ◽  
Guang Ming Wu ◽  
Guo Hua Gao ◽  
Hui Yu Yang ◽  
Ji Chao Wang
Keyword(s):  
Carbon Nanotubes ◽  
Composite Film ◽  
Cathode Materials ◽  
Raw Materials ◽  
Sol Gel ◽  
Multiwall Carbon Nanotubes ◽  
Lithium Ion ◽  
Dip Coating ◽  
Mixed Acid ◽  
Multiwall Carbon

In this paper, V2O5-Multiwall Carbon Nanotubes (MWCNTs) composite film is prepared through sol-gel technique and dip-coating method. MWCNTs pretreated by mixed acid, H2O2 and cheap V2O5 powder are used as raw materials. The morphology, structure and components of the composite film are characterized by corresponding testing instruments. The final electrochemical measurements indicate that: the V2O5-MWCNTs composite film as cathode materials for lithium batteries exhibits better electrochemical performance than ordinary V2O5 film.

scholarly journals Improvement of Physicomechanical Properties of Pineapple Leaf Fiber Reinforced Composite

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
K. Z. M. Abdul Motaleb ◽  
Md Shariful Islam ◽  
Mohammad B. Hoque
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Water Uptake ◽  
Bending Strength ◽  
Alkali Treatment ◽  
Fiber Surface ◽  
Fiber Content ◽  
Pineapple Leaf Fiber ◽  
Bending Modulus ◽  
Leaf Fiber

Pineapple leaf fiber (PALF) reinforced polypropylene (PP) composites were prepared by compression molding. The fiber content varied from 25% to 45% by weight. Water uptake percentages of the composites containing various wt% of fiber were measured. All the composites demonstrated lower water uptake percentages and maximum of 1.93% for 45 wt% PALF/PP composite treated with 7(w/v)% NaOH. Tensile Strength (TS), Tensile Modulus (TM), Elongation at Break (Eb %), Bending Strength (BS), Bending Modulus (BM), and Impact Strength (IS) were evaluated for various fiber content. The 45 wt% PALF/PP composite exhibited an increase of 210% TS, 412% TM, 155% BS, 265% BM, and 140% IS compared to PP matrix. Moreover, with the increasing of fiber content, all the mechanical properties increase significantly; for example, 45 wt% fiber loading exhibited the best mechanical property. Fibers were also treated with different concentration of NaOH and the effects of alkali concentrations were observed. The composite treated with 7 (w/v)% NaOH exhibited an increase of 25.35% TS, 43.45% TM, 15.78% BS, and 52% BM but 23.11% decrease of IS compared to untreated composite. Alkali treatment improved the adhesive characteristics of fiber surface by removing natural impurities, hence improving the mechanical properties. However, over 7% NaOH concentration of the tensile strength of the composite reduced slightly due to overexposure of fibers to NaOH.

Highly Transparent Superhydrophobic Surfaces from Silica Aerogel by Sol-Gel Method

2013 ◽  
Vol 756-759 ◽  
pp. 150-153 ◽  
Author(s):  
Tao Tao Zhang ◽  
Jing Huang ◽  
Rui Zhi Zhang ◽  
Peng Yan Mao ◽  
Pan Fang
Keyword(s):  
Silica Aerogel ◽  
Raw Materials ◽  
Sol Gel ◽  
Hydrophobic Effect ◽  
Three Dimensional ◽  
Dip Coating ◽  
Scanning Electron Micrographs ◽  
High Porosity ◽  
Gel Method ◽  
Sol Gel Method

We study the preparation of thin film on the glass substrate with the method of dip coating, which is based on methanol and MTMS as raw materials, making them form silica aerogel by sol-gel method. Scanning electron micrographs (SEM) show that such a film possesses a porous three-dimensional network structure. The high porosity and low refractive index determine that the transmittance rate can reach 90%. The prepared film also exhibited apparent hydrophobic effect, with the contact angle of 156.3°and rolling angle of less than 10°. The transparency and superhydrophobic of the film make it suitable as multifunctional coatings for many application fields including solar cells, cellphones and a variety of electron device.

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