Gamma(ɣ)-MnO2/rGO Fibered Cathode Fabrication from Wet Spinning and Dip Coating Techniques for Cable-Shaped Zn-Ion Batteries

2022 ◽  
Author(s):  
Nakarin Subjalearndee ◽  
Nanfei He ◽  
Hui Cheng ◽  
Panpanat Tesatchabut ◽  
Priew Eiamlamai ◽  
...  
Keyword(s):  
Dip Coating ◽  
Wet Spinning

Graphene-based single fiber supercapacitor with a coaxial structure

Nanoscale ◽  
2015 ◽  
Vol 7 (21) ◽  
pp. 9399-9404 ◽  
Author(s):  
Xiaoli Zhao ◽  
Bingna Zheng ◽  
Tieqi Huang ◽  
Chao Gao
Keyword(s):  
Specific Capacitance ◽  
High Specific Capacitance ◽  
Dip Coating ◽  
Single Fiber ◽  
Wet Spinning ◽  
Coating Method ◽  
Dip Coating Method

A coaxial graphene single fiber supercapacitor was fabricated through a wet-spinning and dip-coating method, demonstrating good flexibility and high specific capacitance.

A controlled wet-spinning and dip-coating process for preparation of high-permeable TiO2 hollow fiber membranes

2015 ◽  
Vol 73 (4) ◽  
pp. 725-733 ◽  
Author(s):  
Qi Zhang ◽  
Hua Wang ◽  
Xinfei Fan ◽  
Shuo Chen ◽  
Hongtao Yu ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Pure Water ◽  
Ceramic Powder ◽  
Dip Coating ◽  
Wet Spinning ◽  
Test Substance ◽  
Coating Process ◽  
Hollow Fiber Membranes ◽  
Permeate Flux ◽  
Fiber Membranes

In order to improve the permeate flux of photocatalytic membranes, we present an approach for coupling TiO2 with ceramic hollow fiber membranes. The ceramic hollow fiber membranes with high permeate flux were fabricated by a controlled wet-spinning process using polyethersulfone (PESf) and ceramic powder as precursors and 1-methyl-2-pyrrolidinone as solvent, and the subsequent TiO2 coating was performed by a dip-coating process using tetra-n-butyl titanate as precursor. It has been found that the PESf/ceramic powder ratio could influence the structure of the membranes. Here the as-prepared TiO2 hollow fiber membranes had a pure water flux of 4,450 L/(m2·h). The performance of the TiO2 hollow fiber membrane was evaluated using humic acid (HA) as a test substance. The results demonstrated that this membrane exhibited a higher permeate flux under UV irradiation than in the dark and the HA removal efficiency was enhanced. The approach described here provides an operable route to the development of high-permeable photocatalytic membranes for water treatment.

In-Situ Study of NiO Growth on Textured Nickel Tape Using Environmental Scanning Electron Microscope (ESEM) and Hot Stage

2001 ◽  
Vol 7 (S2) ◽  
pp. 1276-1277
Author(s):  
Y. Akin ◽  
R.E. Goddard ◽  
W. Sigmund ◽  
Y.S. Hascicek
Keyword(s):  
Buffer Layer ◽  
Lattice Mismatch ◽  
Sol Gel ◽  
Surface Oxidation ◽  
Dip Coating ◽  
Buffer Layers ◽  
Superconducting Film ◽  
Environmental Scanning ◽  
Cold Rolling And Annealing

Deposition of highly textured ReBa2Cu3O7−δ (RBCO) films on metallic substrates requires a buffer layer to prevent chemical reactions, reduce lattice mismatch between metallic substrate and superconducting film layer, and to prevent diffusion of metal atoms into the superconductor film. Nickel tapes are bi-axially textured by cold rolling and annealing at appropriate temperature (RABiTS) for epitaxial growth of YBa2Cu3O7−δ (YBCO) films. As buffer layers, several oxide thin films and then YBCO were coated on bi-axially textured nickel tapes by dip coating sol-gel process. Biaxially oriented NiO on the cube-textured nickel tape by a process named Surface-Oxidation- Epitaxy (SEO) has been introduced as an alternative buffer layer. in this work we have studied in situ growth of nickel oxide by ESEM and hot stage.Representative cold rolled nickel tape (99.999%) was annealed in an electric furnace under 4% hydrogen-96% argon gas mixture at 1050°C to get bi-axially textured nickel tape.

Preparation of Phytic Acid Modified Polyurethane Wet Spinning Fibers for Application in Pb2+ Adsorption

2019 ◽  
Vol 35 (4) ◽  
pp. 497-506 ◽  
Author(s):  
YINCHUN FANG ◽  
◽  
XINHUA LIU ◽  
XIAO WU ◽  
XUCHEN TAO ◽  
...  
Keyword(s):  
Phytic Acid ◽  
Wet Spinning

Effect of Silver Content on the Crystalline Phase and Microstructure of TiO2 Coating Deposited on Unglazed Ceramics Tile

2020 ◽  
Vol 17 (3) ◽  
pp. 8179-8185
Author(s):  
N.Z. Hafizah ◽  
J. M. Juoi ◽  
M.R. Zulkifli ◽  
M.A. Musa
Keyword(s):  
Particle Growth ◽  
Dip Coating ◽  
Tio2 Coating ◽  
High Concentration ◽  
Ceramic Tiles ◽  
Soaking Time ◽  
Heat Treated ◽  
Ag Particles ◽  
Tio2 Sol ◽  
Almost All

The synthesis of Ag-TiO2 coating using AgNO3 precursor is expected to give the properties as pure as Ag nanoparticles. Commonly, high concentration of Ag attributed to agglomeration of silver species and reduction to Ag0 particles on TiO2 surface. In contrast, at lower concentration, Ag species exist as AgO, Ag2O and Ag0. Hence, the exact amount of Ag, which can effectively control the particle growth and agglomeration, surface area, thermal stability and band gap of the TiO2 coating, are still vague and stated differently. In the present study, the effect of Ag content on the phase transformation and surface morphology of Ag-TiO2 coating were reported. TiO2 sol were prepared by incorporating Ag at 2.5, 5 and 7.5 mol % and deposited on unglazed ceramic tiles thru five times dip coating. The deposited Ag-TiO2 coatings were heat treated at 500 °C for 1 hour soaking time. XRD analyses revealed that the deposited Ag-TiO2 coating consists of anatase, rutile, Ag2O and metallic Ag. Almost all the coating surfaces illustrated cracks. Increased Ag content lead to presence of tiny particles on the surfaces and EDX spectrum revealed the presence of Ti, O and metallic Ag particles. However, at the addition of 5 mol % Ag, there was no metallic Ag presence and a dense coating with the lowest thickness of ±11.4µm is observed.

Porous Gel Coatings Obtained by Phase Separation in ORMOSIL System

2000 ◽  
Vol 628 ◽  
Author(s):  
Kazuki Nakanishi ◽  
Souichi Kumon ◽  
Kazuyuki Hirao ◽  
Hiroshi Jinnai
Keyword(s):  
Phase Separation ◽  
Reaction Time ◽  
Volume Fraction ◽  
Sol Gel ◽  
Reaction Times ◽  
Dip Coating ◽  
Coating Solution ◽  
Coating Method ◽  
Gel Phase ◽  
Dip Coating Method

ABSTRACTMacroporous silicate thick films were prepared by a sol-gel dip-coating method accompanied by the phase separation using methyl-trimethoxysilane (MTMS), nitric acid and dimethylformamide (DMF) as starting components. The morphology of the film varied to a large extent depending on the time elapsed after the hydrolysis until the dipping of the coating solution. On a glass substrate, the films prepared by early dipping had inhomogeneous submicrometer-sized pores on the surface of the film. At increased reaction times, relatively narrow sized isolated macropores were observed and their size gradually decreased with the increase of reaction time. On a polyester substrate, in contrast, micrometer-sized isolated spherical gel domains were homogeneously deposited by earlier dippings. With an increase of reaction time, the volume fraction of the gel phase increased, then the morphology of the coating transformed into co-continuous gel domains and macropores, and finally inverted into the continuous gel domains with isolated macropores. The overall morphological variation with the reaction time was explained in terms of the phase separation and the structure freezing by the forced gelation, both of which were induced by the evaporation of methanol during the dipping operation.

PREPARATION AND CHARACTERIZATION OF POLYVINYL ALCOHOL THIN FILMS FOR ORGANIC THIN FILM TRANSISTORS AND BIOMEDICAL APPLICATIONS

2018 ◽  
Vol 5 (2) ◽  
pp. 16-18
Author(s):  
Chandar Shekar B ◽  
Ranjit Kumar R ◽  
Dinesh K.P.B ◽  
Sulana Sundar C ◽  
Sunnitha S ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Thin Film Transistors ◽  
Gravimetric Method ◽  
Dip Coating ◽  
Organic Thin Film Transistors ◽  
Poly Vinyl Alcohol ◽  
Organic Thin Film ◽  
Glass Substrates ◽  
Coating Method

Thin films of poly vinyl alcohol (PVA) were prepared on pre-cleaned glass substrates by Dip Coating Method. FTIR spectrum was used to identify the functional groups present in the prepared films. The vibrational peaks observed at 1260 cm-1 and 851 cm-1 are assigned to C–C stretching and CH rocking of PVA.The characteristic band appearing at 1432 cm-1 is assigned to C–H bend of CH2 of PVA. The thickness of the prepared thin films were measured by using an electronic thickness measuring instrument (Tesatronic-TTD20) and cross checked by gravimetric method. XRD spectra indicated the amorphous nature of the films.Surface morphology of the coated films was studied by scanning electron microscope (SEM). The surface revealed no pits and pin holes on the surface. The observed surface morphology indicated that these films could be used as dielectric layer in organic thin film transistors and as drug delivery system for wound healing.

PEMBUATAN DAN KARAKTERISASI SERAT HOLLOW DARI SELULOSA BAKTERIAL DENGAN NANOPARTIKEL ZnO UNTUK PENGOLAHAN AIR LIMBAH TEKSTIL

Arena Tekstil ◽  
2014 ◽  
Vol 29 (1) ◽  
Author(s):  
Rizka Yulina ◽  
Srie Gustiani ◽  
Wulan Septiani
Keyword(s):  
Fourier Transform ◽  
Acetobacter Xylinum ◽  
Wet Spinning ◽  
Ph Optimum ◽  
Infra Red ◽  
Remazol Black

Selulosa bakterial mempunyai sifat mekanik yang baik untuk digunakan sebagai membran pada proses pengolahan air limbah tekstil. Pada penelitian ini dilakukan pembuatan dan karakterisasi serat hollow dari bahan baku selulosa bakterial nata de coco dengan penambahan nanopartikel ZnO sebagai fotokatalis terimmobilisasi. Selulosa bakterial disintesis menggunakan bakteri Acetobacter xylinum di dalam medium air kelapa dan gula. Selulosa bakterial dilarutkan bersama dengan nanopartikel ZnO menggunakan pelarut cuprietilen diamina (Cuen) dengan variasi selulosa bakterial 2,25% dan 2,50%. Serat berbentuk hollow dihasilkan dari proses wet spinning menggunakan koagulan NaOH. Serat hollow yang telah melalui koagulan kemudian direndam dalam larutan asam, gliserol, dan alkohol, dengan variasi waktu perendaman asam selama 1 dan 2 hari. Uji kekuatan tarik menunjukkan hasil yang terbaik yakni sebesar 815,72 gf pada konsentrasi selulosa bakterial 2,50% dan perendaman asam selama 2 hari. Dari hasil uji gugus fungsi menggunakan spektroskopi Fourier Transform Infra Red (FTIR), terdapat beberapa gugus fungsi yang menunjukkan keberadaan selulosa dan nanopartikel ZnO. Proses dekolorisasi fotokatalitik terhadap air limbah tekstil artifisial yang mengandung zat warna reaktif Remazol Black 5 (RB5) menunjukkan bahwa pH optimum proses penyisihan warna yakni pada pH 9 dan dihasilkan persen penyisihan warna yang tertinggi yaitu 90,32%. Pada kondisi yang sama, proses dekolorisasi RB5 menggunakan serat hollow tanpa nanopatikel ZnO hanya menghasilkan persen penyisihan warna sebesar 32,10%. Berdasarkan laju penyisihan zat warna, aktivitas degradasi fotokatalitik terbesar (k’ = 0,2615) diperoleh pada konsentrasi ZnO 10% dan konsentrasi zat warna RB5 10 ppm.

PENINGKATAN SIFAT MEKANIK SERAT KITOSAN MELALUI PROSES PLASTISISASI DENGAN GLISEROL SETELAH PROSES DEHIDRASI DENGAN METANOL

Arena Tekstil ◽  
2012 ◽  
Vol 27 (2) ◽  
Author(s):  
Wiwin Winiati ◽  
Tatang Wahyudi ◽  
Indra Kurniawan ◽  
Rizka Yulina
Keyword(s):  
Wet Spinning

Serat kitosan mempunyai sifat getas, kekuatan yang rendah terutama dalam keadaan basah dan elongasisaat putus yang rendah disebabkan kristalin yang tinggi. Untuk dapat digunakan sebagai benang operasimonofilamen, diperlukan serat kitosan dengan diameter yang relatif kecil tetapi mempunyai kekuatan tarik yangtinggi disertai fleksibilitas dan elongasi yang baik sehingga mudah dibuat simpul. Proses dehidrasi dengan metanoltelah berhasil meningkatkan kekuatan dan menurunkan diameter tetapi elongasi menurun. Penelitian ini ditujukanuntuk meningkatkan sifat mekanik terutama elongasi serat kitosan dengan cara melakukan proses plastisisasidengan gliserol setelah proses dehidrasi dengan metanol . Hasil penelitian menunjukkan bahwa pada serat kitosanyang dibuat dari larutan kitosan dengan viskositas 5.684 mPa.s dengan alat wet-spinning menggunakan spinneretdengan diameter 1500 μm, proses dehidrasi dengan metanol dilanjutkan dengan proses plastisisasi dengan gliserolmemberikan penurunan diameter 7 %, peningkatan densitas 46%, peningkatan kekuatan tarik 90%, danpeningkatan elongasi 167 %. Dengan proses plastisisasi serat kitosan menjadi lebih hidrofil, densitas dan %kristalinitas naik sehingga serat lebih padat merata dan memberikan peningkatan elongasi yang signifikan.

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