1
|
Elhalawany N, El-Naggar ME, Elsayed A, Wassel AR, El-Aref AT, Abd Elghaffar MA. Polyaniline/zinc/aluminum nanocomposites for multifunctional smart cotton fabrics. MATERIALS CHEMISTRY AND PHYSICS 2020; 249:123210. [DOI: 10.1016/j.matchemphys.2020.123210] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
2
|
Ramphal IA, Hagerman ME. Nanoscale morphology, tribology and electrical properties of polyaniline/graphene oxide/LAPONITE® composites investigated using atomic force microscopy. NANOSCALE 2019; 11:20876-20883. [PMID: 31657821 DOI: 10.1039/c9nr05713g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Polyaniline composites with graphene and graphene oxide have received broad interest for applications in charge separation and storage in electrical devices. Syntheses via in situ polymerization of aniline in colloidal dispersions of graphene oxide have afforded nanocomposites of polyaniline intercalated within graphene oxide nanosheets. The simultaneous inclusion of LAPONITE® nanoparticles has improved aqueous phase processability and thin film formation. Mechanical, morphological and conductivity studies including atomic force microscopy and scanning electron microscopy were employed to study the host-guest interactions and heterointerfaces that govern self-assembly. Adhesion and conductivity values within graphene oxide/polyaniline/LAPONITE® (GOPL) nanocomposites were tuned by varying the weight ratios of polyaniline : graphene oxide. These studies inform ongoing work to use GOPL nanomaterials for clean energy harvesting and storage applications.
Collapse
|
3
|
Cabuk M, Gündüz B. Change of optoelectronic parameters of the boric acid-doped polyaniline conducting polymer with concentration. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
4
|
Ayub A, Shakoor A, Rizvi TZ, Elahi E. Study of structural, electrical and dielectric behavior of cadmium selenide quantum dots/polyaniline nanocomposites. POLYMER SCIENCE SERIES A 2017. [DOI: 10.1134/s0965545x17020018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
5
|
Jun CS, Sim B, Choi HJ. Fabrication of electric-stimuli responsive polyaniline/laponite composite and its viscoelastic and dielectric characteristics. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.07.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
6
|
de Barros A, Ferreira M, Constantino CJL, Bortoleto JRR, Ferreira M. Synergy between polyaniline and OMt clay mineral in Langmuir-Blodgett films for the simultaneous detection of traces of metal ions. ACS APPLIED MATERIALS & INTERFACES 2015; 7:6828-6834. [PMID: 25761908 DOI: 10.1021/acsami.5b00187] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report on Langmuir-Blodgett (LB) films made with emeraldine salt polyaniline (PAni-ES) and organophilic montmorillonite clay mineral (OMt), where synergy between the components was reached to yield an enhanced performance in detecting trace levels of cadmium (Cd(2+)), lead (Pb(2+)) and copper (Cu(2+)). Detection was carried out using square wave anodic stripping (SWAS) voltammetry with indium tin oxide (ITO) electrodes modified with LB films of PAni-ES/OMt nanocomposite, whose data were compared to those obtained with electrodes coated with neat PAni-ES and neat OMt LB films. The enhanced performance in the nanocomposite may be attributed to the stabilizing and ordering effect promoted by OMt in PAni-ES Langmuir films, which then led to more homogeneous LB films. According to X-ray diffraction data, the stacking of OMt layers was preserved in the LB films and therefore the PAni-ES chains did not cause clay mineral exfoliation. Instead, OMt affected the polaronic state of PAni-ES as indicated in UV-vis, Raman and FTIR spectra, also consistent with the changes observed for the Langmuir films. Taken together these results do indicate that semiconducting polymers and clay minerals may be combined for enhancing the electrical properties of nanostructures for sensing and related applications.
Collapse
Affiliation(s)
- Anerise de Barros
- †Faculdade de Ciências, UNESP/POSMAT, Univ Estadual Paulista, Bauru, São Paulo, Brazil
- ‡Universidade Federal de São Carlos (UFSCar), Campus Sorocaba, Sorocaba, São Paulo, Brazil
| | | | | | | | - Marystela Ferreira
- ‡Universidade Federal de São Carlos (UFSCar), Campus Sorocaba, Sorocaba, São Paulo, Brazil
| |
Collapse
|
7
|
Ramphal IA, Hagerman ME. Water-processable laponite/polyaniline/graphene oxide nanocomposites for energy applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:1505-1515. [PMID: 25569226 DOI: 10.1021/la5046783] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Graphene-polyaniline (GP) nanocomposites have demonstrated remarkable ability as supercapacitive materials and are typically synthesized via chemical reduction of graphene oxide/polyaniline (GOP) precursors. We report the formation of novel nanomaterials combining GOP nanocomposites with Laponite nanodisks. Host-guest interactions within GOP systems were studied with and without Laponite nanoparticle templating agents. Incorporating Laponite clay into the composite synthesis enhances aqueous dispersibility as well as facilitates the casting of homogeneous films. Structural and morphological characterization confirmed porous heterointerfaces and control of polymer and nanoclay loading. These results may enable the development of flexible supercapacitive and solar nanocomposites with improved device utility, water dispersibility, and film processability. We demonstrate that these films can be easily cast and that the composites maintain their electrical transport properties.
Collapse
Affiliation(s)
- Isaac A Ramphal
- Department of Chemistry, Union College , Schenectady, New York 12308, United States
| | | |
Collapse
|
8
|
Khanna PK, Bhanoth S, Dhanwe V, Kshirsagar A, More P. In situ SeO2promoted synthesis of CdSe/PPy and Se/PPy nanocomposites and their utility in optical sensing for detection of Hg2+ions. RSC Adv 2015. [DOI: 10.1039/c5ra14425f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The reaction of selenium dioxide, a mild oxidizing agent, leads to the initiation of polymerization of pyrrole. The presence of cadmium metal can generate CdSe/PPy nanocomposites however, without it, Se/ PPy composites have been isolated.
Collapse
Affiliation(s)
- Pawan K. Khanna
- Nanochemistry Lab
- Department of Applied Chemistry
- Defence Institute of Advanced Technology (DIAT)
- Ministry of Defence
- Govt. of India
| | - Sreenu Bhanoth
- Nanochemistry Lab
- Department of Applied Chemistry
- Defence Institute of Advanced Technology (DIAT)
- Ministry of Defence
- Govt. of India
| | - Vaishali Dhanwe
- Nanochemistry Lab
- Department of Applied Chemistry
- Defence Institute of Advanced Technology (DIAT)
- Ministry of Defence
- Govt. of India
| | - Anuraj Kshirsagar
- Nanochemistry Lab
- Department of Applied Chemistry
- Defence Institute of Advanced Technology (DIAT)
- Ministry of Defence
- Govt. of India
| | - Priyesh More
- Nanochemistry Lab
- Department of Applied Chemistry
- Defence Institute of Advanced Technology (DIAT)
- Ministry of Defence
- Govt. of India
| |
Collapse
|
9
|
Ontam A, Khaorapapong N, Ogawa M. An incorporation of cadmium selenide at organophillic surface of clay mineral. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.06.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
10
|
Ontam A, Khaorapapong N, Ogawa M. Simple preparation of a cadmium selenide–montmorillonite hybrid. J Colloid Interface Sci 2011; 357:554-7. [DOI: 10.1016/j.jcis.2011.02.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Accepted: 02/05/2011] [Indexed: 11/29/2022]
|
11
|
Celiz MD, Colón LA, Watson DF, Aga DS. Study on the effects of humic and fulvic acids on quantum dot nanoparticles using capillary electrophoresis with laser-induced fluorescence detection. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:2917-2924. [PMID: 21381674 DOI: 10.1021/es1031097] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The increasing production and use of quantum dot (QD) nanoparticles have caused concerns on the possibility of contaminating the aquatic and terrestrial ecosystems with wastes that may contain QDs. Therefore, studies on the behavior of QDs upon interaction with components of the natural environment have become of interest. This study investigated the fluorescence and electrophoretic mobility of carboxylic or amine polyethylene glycol (PEG)-functionalized CdSe/ZnS QDs in the presence of two aquatic humic substances (HS), Suwannee River humic and fulvic acids, using capillary electrophoresis with laser-induced fluorescence detection. Results showed initial enhancement in fluorescence of QDs at the onset of the interaction with HS, followed by fluorescence quenching at longer exposure with HS (>30 min). It was also observed that the electrophoretic mobility of QDs increases with increasing concentration of HS, suggesting an increase in the ratio in charge to hydrodynamic size of the nanoparticles. To determine if the QDs degraded upon interaction with HS, the QD-HS mixtures were dialyzed to separate free Cd2+ from intact QDs, followed by analysis of the solutions using inductively coupled plasma-mass spectrometry. Results suggested that degradation of QDs in the presence of HS did not occur within the period of incubation.
Collapse
Affiliation(s)
- Mary Dawn Celiz
- Department of Chemistry, Natural Sciences Complex, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | | | | | | |
Collapse
|
12
|
Synthesis of polyaniline/Q-CdSe composite via ultrasonically assisted dynamic inverse emulsion polymerization. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2400-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
13
|
Sudha JD, Pich A, Reena VL, Sivakala S, Adler HJP. Water-dispersible multifunctional polyaniline-laponite-keggin iron nanocomposites through a template approach. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm13494a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
Xu Q, Leng J, Li HB, Lu GJ, Wang Y, Hu XY. The preparation of polyaniline/gold nanocomposites by self-assembly and their electrochemical applications. REACT FUNCT POLYM 2010. [DOI: 10.1016/j.reactfunctpolym.2010.05.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
15
|
Li YC, Schulz J, Grunlan JC. Polyelectrolyte/nanosilicate thin-film assemblies: influence of pH on growth, mechanical behavior, and flammability. ACS APPLIED MATERIALS & INTERFACES 2009; 1:2338-2347. [PMID: 20355871 DOI: 10.1021/am900484q] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Thin composite films of branched polyethylenimine (BPEI) and Laponite clay platelets were prepared using layer-by-layer assembly. The film thickness was tailored by altering the pH of the aqueous mixtures used to deposit these films, resulting in growth that ranged from 0.5 to 5 nm/bilayer (BL). High-pH BPEI and low-pH clay produced the thickest films. The microstructure of tilted Laponite clay platelet stacks is observed with transmission electron microscopy when using unadjusted BPEI (pH 10.3) and pH 6 Laponite. This recipe resulted in a film with 83 wt % clay and a hardness of 0.5 GPa. In all films, the clay platelets are uniformly deposited and look analogous to a cobblestone path in atomic force microscopy surface images. Several 40-BL films, with thicknesses of 100 nm or more, exhibit reduced moduli ranging from 7 to 10 GPa and hardness of around 0.5 GPa, suggesting that these transparent films could be useful as hard coatings for plastic films. These thin coatings were also deposited onto cotton fabric. Each individual cotton fiber was uniformly coated, and the fabric has significantly more char left after burning than the uncoated fabric. Thermogravimetric analysis results reveal that fabric coated with 10 BLs of BPEI/Laponite produces up to 6 wt % char at 500 degrees C, which is almost 1 order of magnitude greater than that of untreated fabric. This initial study demonstrates that polymer/clay assemblies could improve the thermal stability of cotton and may be useful for fire safety applications.
Collapse
Affiliation(s)
- Yu-Chin Li
- Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77843, USA
| | | | | |
Collapse
|