scholarly journals The Interplay between Whey Protein Fibrils with Carbon Nanotubes or Carbon Nano-Onions

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 608
Author(s):  
Ning Kang ◽  
Jin Hua ◽  
Lizhen Gao ◽  
Bin Zhang ◽  
Jiewen Pang
Keyword(s):  
Carbon Nanotubes ◽  
Whey Protein ◽  
Chemical Vapor ◽  
Xrd Analysis ◽  
Protein Isolate ◽  
New Materials ◽  
Induction Process ◽  
Protein Fibrils ◽  
Spectroscopy Studies ◽  
New Phase

Whey protein isolate (WPI) fibrils were prepared using an acid hydrolysis induction process. Carbon nanotubes (CNTs) and carbon nano-onions (CNOs) were made via the catalytic chemical vapor deposition (CVD) of methane. WPI fibril–CNTs and WPI fibril–CNOs were prepared via hydrothermal synthesis at 80 °C. The composites were characterized by SEM, TEM, FTIR, XRD, Raman, and TG analyses. The interplay between WPI fibrils and CNTs and CNOs were studied. The WPI fibrils with CNTs and CNOs formed uniform gels and films. CNTs and CNOs were highly dispersed in the gels. Hydrogels of WPI fibrils with CNTs (or CNOs) could be new materials with applications in medicine or other fields. The CNTs and CNOs shortened the WPI fibrils, which might have important research value for curing fibrosis diseases such as Parkinson’s and Alzheimer’s diseases. The FTIR revealed that CNTs and CNOs both had interactions with WPI fibrils. The XRD analysis suggested that most of the CNTs were wrapped in WPI fibrils, while CNOs were partially wrapped. This helped to increase the biocompatibility and reduce the cytotoxicity of CNTs and CNOs. HR-TEM and Raman spectroscopy studies showed that the graphitization level of CNTs was higher than for CNOs. After hybridization with WPI fibrils, more defects were created in CNTs, but some original defects were dismissed in CNOs. The TG results indicated that a new phase of WPI fibril–CNTs or CNOs was formed.

The Doping Effects of SiC and Carbon Nanotubes on the Manufacture of Superconducting Monofilament MgB2 Wires

2019 ◽  
Vol 966 ◽  
pp. 249-256 ◽  
Author(s):  
Agung Imaduddin ◽  
Samsulludin ◽  
Muhammad Reza Wicaksono ◽  
Iman Saefuloh ◽  
Satrio Herbirowo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Xrd Analysis ◽  
High Magnetic Fields ◽  
Major Phase ◽  
X Ray ◽  
Superconducting Coils ◽  
Doping Effects ◽  
New Phase ◽  
Powder In Tube ◽  
Scanning Electron

MgB2 superconductor is a superconductor with a critical temperature of around 39K and has the potential to replace Nb3Sn and NbTi as superconducting coils to produce high magnetic fields. In this study, monofilament wires have been made to analyze the doping effect of SiC and Carbon Nanotubes (CNT) in its manufacture using Powder-In-Tube (PIT) method. Stainless Steel (SS-316) tube was used as a tube filled with powders of starting materials of Mg, B, SiC and CNT. A total of 8 samples were prepared with variations in the addition of SiC, and CNT as much as 5, 10, and 15 wt %, and also the variations in the addition of Mg composition by 0 and 10 mol % from normal stoichiometric values. The samples were rolled and sintered at 800°C for 3 hours. The samples then were analyzed using SEM (Scanning Electron Microscopy) to analyze the surface morphology, XRD (X-Ray Diffractometer) to analyze the formed phases and crystal structures, and then resistivity versus temperature using cryogenic systems to analyze their superconductivity properties. Based on the results of the XRD analysis, the MgB2 phase is the major phase in the samples and the SiC doping causes the formation of minor phases of Mg2Si and Fe3C. The addition of SiC causes a decrease in crystalline properties of the MgB2 phase due to reaction with SiC, while the addition of CNT does not cause the formation of a new phase. Based on the results of the analysis of resistance versus temperature, it is seen that the addition of SiC causes a decrease in TC value. While the addition of CNT causes the improvement in the nature of superconductivity, but it also causes the decrease of its TC values.

Properties of protein fibrils in whey protein isolate solutions: Microstructure, flow behaviour and gelation

2008 ◽  
Vol 18 (10-11) ◽  
pp. 1034-1042 ◽  
Author(s):  
C. Akkermans ◽  
A.J. Van der Goot ◽  
P. Venema ◽  
E. Van der Linden ◽  
R.M. Boom
Keyword(s):  
Whey Protein ◽  
Whey Protein Isolate ◽  
Protein Isolate ◽  
Flow Behaviour ◽  
Protein Fibrils

scholarly journals Growth Phenomena of Carbon Nanotubes Over Co-Mo/MgO Catalyst from the Decomposition of Acetylene

1970 ◽  
Vol 42 (2) ◽  
pp. 105-114 ◽  
Author(s):  
Md Shajahan ◽  
AKM Fazle Kibria
Keyword(s):  
Carbon Nanotubes ◽  
Tip Growth ◽  
Catalyst Surface ◽  
Chemical Vapor ◽  
Catalytic Decomposition ◽  
Xrd Analysis ◽  
Carbon Yield ◽  
Raman Analysis ◽  
Cvd Method ◽  
Close Relationship

Carbon nanotubes (CNTs) were grown over 12Mo:18Co:70MgO catalyst at 500, 700 and 900° C from C2H2 decomposition for 30 minutes using chemical vapor deposition (CVD) method. The highest yield of CNTs was observed at 700O C. The lowest diameter of CNTs appeared at 900° C. Quadruple mass spectroscopy (QMS) study on the species generated from the catalytic decomposition of C2H2 identified that the catalyst consumed C species during the growth stage of CNTs. The consumption period of C varied with temperature and showed a close relationship with the carbon yield. At 500, 700 and 900°C, the consumption periods were 12, 35 and 20 min, respectively, and the corresponding carbon yields were 7, 385 and 89%. From the XRD analysis of catalyst surface, and XRD and Raman analysis of the CNTs, it was realized that Co particles released from Co3O4, CoMoO4 and CoO-MgO were participated in CNTs growth at 500, 700 and 900° C, respectively. The Co particles acted as the transporting medium of carbon to grow CNTs. The tubes are MWNTs and grown by tip growth mode. Bangladesh J. Sci. Ind. Res. 42(2), 105-114, 2007

Multi-Walled Carbon Nanotubes by Thermal-CVD Utilizing Palm DHSA as a Precursor

2013 ◽  
Vol 667 ◽  
pp. 349-353
Author(s):  
N.F.A. Zainal ◽  
T.I. Tunku Kudin ◽  
A.A. Azira ◽  
A. Zain Ahmed ◽  
Saifollah Abdullah ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Vapor Deposition ◽  
Sol Gel ◽  
Chemical Vapor ◽  
High Yield ◽  
Multi Wall Carbon Nanotubes ◽  
Thermal Chemical Vapor Deposition ◽  
Multi Walled Carbon Nanotubes ◽  
Spectroscopy Studies ◽  
Walled Carbon Nanotubes

We illustrated the optimization of the growth of multi-wall carbon nanotubes (MWCNTs) using thermal chemical vapor deposition (CVD). Palm-based dihydrostearic acid (DHSA) which was never been reported as a precursor, was used as the precursor over five different trimetallic catalysts for the growth of MWCNTs. These trimetallic catalysts were prepared by sol-gel method and used to study on the effect of the production of the MWCNTs from palm DHSA. With different catalyst, the characteristics of MWCNTs changes such as diameter and crystallinity which was confirmed by SEM and Raman spectroscopy studies. The trimetallic catalysts give high yield and offer good graphitization of MWCNTs produced from palm DHSA.

scholarly journals Effects of Gas Composition in Producing Carbon Nanomaterials by Plasma Enhanced Chemical Vapor Deposition

2022 ◽  
Vol 2152 (1) ◽  
pp. 012052
Author(s):  
Chen Yang
Keyword(s):  
Carbon Nanotubes ◽  
Vapor Deposition ◽  
Carbon Nanomaterials ◽  
Chemical Vapor ◽  
Gas Composition ◽  
New Materials ◽  
Important Method ◽  
Growth Regime ◽  
Factors Influencing ◽  
Carbon Nanowalls

Abstract Carbon nanomaterials are becoming new materials which can be used in many fields including transistors, sensors, displays, hydrogen storage, capacitors, catalyst supporters and so on. PECVD is an important method for producing carbon nanomaterials. However, it remains a challenge to control the final production of the PECVD process. This paper tries to figure out the gas factors influencing the growth of different carbon nanomaterials. This paper begins with a brief introduction of PECVD and the growth regime of carbon nanowalls and carbon nanotubes. It discusses how the Argon, carbon source, hydrogen and other gas affect the growth of CNMs. The paper ends with a discussion on the practical influence of confirming the function of each gas.

scholarly journals Characterization and Optimization of Persian Gum/Whey Protein Bionanocomposite Films Containing Betanin Nanoliposomes for Food Packaging Utilization

2021 ◽  
Author(s):  
Zahra Ghasempour ◽  
Sepideh Khodaivandi ◽  
Hossein Ahangari ◽  
Hamed Hamishehkar ◽  
Sajed Amjadi ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Whey Protein ◽  
Food Packaging ◽  
Antioxidative Activity ◽  
Antioxidant Properties ◽  
Xrd Analysis ◽  
Protein Isolate ◽  
Life Extension ◽  
Bionanocomposite Films ◽  
Central Composite

Abstract In this study, composite packaging films were produced from relatively inexpensive materials including whey protein isolate (WPI) and Persian gum (PG), supplemented with betanin nanoliposomes (NLPs). Using response surface methodology (central composite design), we investigated the effects of two variables (PG [0–2% w/v] and betanin NLPs’ [0–10% w/v] content) on the physico-mechanical and antioxidant properties of the film treatments. Afterward, the optimal treatment was evaluated for structural and antimicrobial characteristics. The film samples' permeability to water vapor decreased with the addition of NLP (from 7.38 to 5.46 g/Pa.s.m) but increased with PG incorporation; decreased solubility was observed when either substance was added. Mechanical properties like Young’s modulus and tensile strength were weakened by PG addition, but the incorporation of NLPs led to pronounced tensile strength. XRD analysis revealed improved crystallinity through NLPs’ addition. The presence of NLPs in the nanocomposite film resulted in an elevated level of antibacterial activity against Staphylococcus aureus, while the addition of both PG and betanin NLPs led to improved antioxidative activity (63.45%). Considering the results, PG/WPI films loaded with betanin NLPs could be introduced in active packaging applications for the shelf life extension of perishable food products.

scholarly journals Advances in Fabricating the Electrospun Biopolymer-Based Biomaterials

2021 ◽  
Vol 12 (2) ◽  
pp. 26
Author(s):  
Sebastian Wilk ◽  
Aleksandra Benko
Keyword(s):  
Mechanical Properties ◽  
Whey Protein ◽  
Antimicrobial Properties ◽  
Protein Isolate ◽  
Review Article ◽  
Animal Tissues ◽  
Green Material ◽  
Good Potential ◽  
Fibrous Morphology ◽  
Selection Of

Biopolymers formed into a fibrous morphology through electrospinning are of increasing interest in the field of biomedicine due to their intrinsic biocompatibility and biodegradability and their ability to be biomimetic to various fibrous structures present in animal tissues. However, their mechanical properties are often unsatisfactory and their processing may be troublesome. Thus, extensive research interest is focused on improving these qualities. This review article presents the selection of the recent advances in techniques aimed to improve the electrospinnability of various biopolymers (polysaccharides, polynucleotides, peptides, and phospholipids). The electrospinning of single materials, and the variety of co-polymers, with and without additives, is covered. Additionally, various crosslinking strategies are presented. Examples of cytocompatibility, biocompatibility, and antimicrobial properties are analyzed. Special attention is given to whey protein isolate as an example of a novel, promising, green material with good potential in the field of biomedicine. This review ends with a brief summary and outlook for the biomedical applicability of electrospinnable biopolymers.

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