scholarly journals Effect on Thermal Properties of Nanocellulose Fibre (NCF) Reinforced Biodegradable Polyhydroxylalkanoates (PHA) Composite

2021 ◽  
Vol 7 (1) ◽  
pp. 10-13
Author(s):  
N. S. Nazaruddin ◽  
S. S. Jamari
Keyword(s):  
Thermal Properties ◽  
Fourier Transforms ◽  
Petri Dish ◽  
Biodegradable Materials ◽  
Ftir Analysis ◽  
Optimum Amount ◽  
Industrial Sectors ◽  
Enthalpy Of Melting ◽  
Fourier Transforms Infrared Spectroscopy ◽  
Composite Samples

Currently, biodegradable materials like polyhydroxyalkanoates (PHA) and polylactic acid (PLA) are receiving huge attention from the both scientific and industrial sectors. However, since PHA has poor thermal properties, there is a shortfall in the exploration of PHA ability with filler. Therefore, this research aim is to investigate the thermal effect of nanocellulose fiber (NCF) fillers with PHA polymer. The first solution of PHA composite is prepared by dissolving 1g of PHA in 40mL of dichloromethane at 30°C for 10 minutes. The PHA-NCF composite solution is prepared by adding 1wt%, 2wt%, 3wt%, and 4wt% of NCF dissolved in 40 mL of dichloromethane into the PHA solution. The mixture solution is agitated at 45°C with a magnetic stirrer for 10 minutes. The mixture is poured into a petri dish. The prepared films were characterized by Differential Scanning Calorimeter (DSC), Fourier Transforms Infrared Spectroscopy, (FTIR), and Thermogravimetric Analysis (TGA).  The FTIR analysis shows that all PHA/NCF composite samples contain similar functional groups when compared with the pure PHA. No significant changes on the thermal properties of the PHA composite was observed with the addition of NCF fillers. However, comparison within the PHA/NCF samples shows that the PHA with 2% of NCF has a higher melting temperature and requires the highest enthalpy of melting. Hence, the addition of 2% of NCF is selected to be the optimum amount of NCF filler addition to the PHA composite.

Anisotropic acoustic phonon polariton-enhanced infrared spectroscopy for single molecule detection

Nanoscale ◽  
2021 ◽  
Author(s):  
wei Lv ◽  
hanchao Teng ◽  
chenchen Wu ◽  
Xiaotao Zhang ◽  
Xiangdong Guo ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Single Molecule ◽  
Scanning Probe Microscopy ◽  
Acoustic Phonon ◽  
Fourier Transforms ◽  
High Spatial Resolution ◽  
Scanning Probe ◽  
Surface Species ◽  
Composition And Structure ◽  
Fourier Transforms Infrared Spectroscopy

Nanoscale Fourier transforms infrared spectroscopy (nano-FTIR) based on scanning probe microscopy enables identification of chemical composition and structure of surface species with a high spatial resolution (~10 nm), which is...

Characterization and Evaluation of Ca/Al LDHs Adsorbents Synthesized by a One-Step Hydrothermal Method for Congo Red Removal

2020 ◽  
Vol 977 ◽  
pp. 195-200
Author(s):  
Hong Tham Thi Nguyen ◽  
Dao Thi To Uyen ◽  
Duy Chinh Nguyen ◽  
Van Thuan Tran ◽  
Tri Duc Lam ◽  
...  
Keyword(s):  
Congo Red ◽  
Fourier Transforms ◽  
X Ray Diffraction ◽  
Anionic Dyes ◽  
One Step ◽  
Ft Ir ◽  
Fourier Transforms Infrared Spectroscopy ◽  
Hydrothermal Approach ◽  
Double Hydroxide ◽  
Hydrolysis Of

We investigated the fabrication of Ca/Al layered double hydroxide (LDHs) via a one-step hydrothermal approach with slow hydrolysis of urea at a low temperature without further annealing required. The as-synthesized Ca/Al LDHs nanostructures obtained were defined using Fourier transforms infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results demonstrated that Ca/Al LDHs exhibit excellent adsorption performance on Congo red anionic dyes in aqueous solution. The adsorption capacity of the Ca/Al LDHs toward Congo red was found to be 59.41 mg/g.

Research on the Microscopic Characterization of Preparing Alpha-Hemi Hydrate Gypsum from FGD Gypsum at Atmospheric Pressure

2011 ◽  
Vol 99-100 ◽  
pp. 944-947
Author(s):  
Yun Zhang ◽  
Xiao Fei Li ◽  
Wen Xuan Yin
Keyword(s):  
Atmospheric Pressure ◽  
Solution Method ◽  
Fourier Transforms ◽  
Heating Temperature ◽  
Aqueous Salt Solution ◽  
Fgd Gypsum ◽  
Stereo Microscope ◽  
Fourier Transforms Infrared Spectroscopy ◽  
Hemi Hydrate

The condition of preparing α-hemi hydrate gypsum from FGD gypsum at atmospheric pressure is easy to achieve. It acquires atmospheric pressure and low heating temperature. This paper introduces two different methods of preparing α-hemi hydrate gypsum, aqueous salt solution method and dry dehydration. Use the microscopic characterization of α-hemi hydrate gypsum to identify the product. Observe the crystal of product by stereo microscope and characterize the compounds with Fourier transforms infrared spectroscopy. Investigate the factors’ effects between the two methods.

Preparation of Shape Stabilized PCMs by Vacuum Impregnating Method of Diatomite

2012 ◽  
Vol 630 ◽  
pp. 71-74
Author(s):  
Su Gwang Jeong ◽  
Jeong Hun Lee ◽  
Su Min Kim
Keyword(s):  
Thermal Properties ◽  
Energy Saving ◽  
Latent Heat ◽  
Thermal Efficiency ◽  
Vacuum Treatment ◽  
Heat Capacities ◽  
Preparation Process ◽  
Ftir Analysis ◽  
Dsc Analysis ◽  
Form Stability

This paper deals with the thermal performances of PCM/diatomite composites for energy saving. The PCM/diatomite composites were prepared by incorporating PCMs in the pores of diatomite to increase form stability of PCMs. In experiment, we used hexadecane and octadecane as PCM. The PCMs could be retained at 50wt% in the pores of the diatomite without leakage. Thermal efficiency was also analyzed through vacuum treatment during the preparation process. An optimal preparing method for 50wt% of PCM impregnation is proposed. Thermal properties of PCM/diatomite composites were determined using DSC, and were characterized by SEM and FTIR analysis. SEM results showed that the PCMs are well- infiltrated into the structure of diatomite. DSC analysis results showed that the latent heat capacities of PCM/diatomite composites were 50% the value of pure PCMs.

scholarly journals Study of the Biodegradation of PLA/PBAT Films after Biodegradation Tests in Soil and the Aqueous Medium

2021 ◽  
Vol 12 (1) ◽  
pp. 833-846
Keyword(s):  
Contact Angle ◽  
Aqueous Medium ◽  
Visual Analysis ◽  
Fourier Transforms ◽  
Scanning Calorimetry ◽  
Thermal Compression ◽  
Hydrophilic Character ◽  
Ft Ir ◽  
Fourier Transforms Infrared Spectroscopy ◽  
Biodegradation In Soil

The intense consumption of conventional plastics has been generating a series of problems for nature due to the accumulation of municipal solid waste because of its difficult degradation. Therefore, the use of biodegradable polymers becomes a good option to minimize these effects. Poly (lactide acid)/poly(butylene adipate-co-terephthalate) (PLA/PBAT) is a biodegradable blend that can be used mainly in applications that have a short shelf life. So, it is important to know the total biodegradation time of this blend. For this reason, PLA/PBAT films (1.5 x 1.5 x 0.15 cm) were produced by thermal compression molding to be subjected to biodegradation tests in soil and aqueous medium for 180 days. The films were characterized by visual analysis, weight loss measurements, differential scanning calorimetry (DSC), Fourier transforms infrared spectroscopy (FT-IR), contact angle, and scanning electron microscopy (SEM). DSC showed an increase of 0.7% in PLA crystallinity subjected to the aqueous medium, while FT-IR showed a reduction in the bands at 1710 cm-1 and 1100 cm-1, as a result of hydrolysis for both methodologies. The blend's hydrophilic character was increased after both degradation processes, presenting a reduction of 34.5% in the contact angle after biodegradation in soil. From the results, it was possible to conclude that PLA/PBAT films did not degrade completely, as expected, but showed signs that indicated the beginning of the degradation. The degradation was more effective in the aqueous medium.

scholarly journals Biopolymer of Chitosan from Fish Scales as Natural Coagulant for Iron–Contaminated Groundwater Treatment

2018 ◽  
Vol 13 (2) ◽  
pp. 93-99 ◽  
Author(s):  
Chairul Irawan ◽  
Iryanti Fatyasari Nata ◽  
Meilana Dharma Putra ◽  
Rosmasari Marisa ◽  
Mira Asnia ◽  
...  
Keyword(s):  
Fourier Transforms ◽  
Iron Concentration ◽  
Fish Scales ◽  
Groundwater Treatment ◽  
Iron Ion ◽  
Anabas Testudineus ◽  
Natural Coagulant ◽  
X Ray ◽  
Reduction Efficiency ◽  
Fourier Transforms Infrared Spectroscopy

Chitosan, the de-acetylated chitin derivative, was evaluated for its ability to be used as a natural coagulant for Martapura groundwater treatment. This study is used chitosan derived from original fish scales of Kalimantan called Papuyu (Anabas testudineus) for the treatment of iron ion-containing Martapura groundwater through coagulation-flocculation method. The reduction efficiency of iron ion removed by coagulation-flocculation processes using chitosan from Papuyu fish scales is the primary evaluating parameter. The obtained chitosan have been characterized and analyzed by Fourier transforms infrared spectroscopy (FTIR), X-ray Fluroscence (XRF) and Scanning electron microscopy (SEM). Using of the chitosan from Papuyu fish scales as coagulant at neutral pH and room temperature led to decreasing the groundwater iron concentration become 3.43 mg/L (around 71% removal). The result was then compare to the coagulation-flocculation treatment using the commercial chitosan from shrimps shell (93% deacetylated). Moreover, its found the coagulation-flocculation treatment using the chitosan from fish scales as coagulant more favor than the commercial one.

Effect of Hectorite Clay Loading on Thermal Properties of Superabsorbent Polymer Composite Based on Polystyrene-Graft-Polycrylic Acid/Hectorite Clay and Mung Bean Starch

2019 ◽  
Vol 801 ◽  
pp. 109-114
Author(s):  
Nurul Fasiha Deraman ◽  
Nur Raihan Mohamed ◽  
Ahmad Zafir Romli
Keyword(s):  
Thermal Properties ◽  
Acrylic Acid ◽  
Mung Bean ◽  
Superabsorbent Polymer ◽  
Ftir Analysis ◽  
Grafting Polymerization ◽  
Ammonium Persulphate ◽  
Hydrogel Composite ◽  
Mung Bean Starch ◽  
Tga Analysis

A series of superabsorbent polymer composites (SAPCs) were synthesized via emulsion polymerization of partially neutralized acrylic acid onto polystyrene in the presence of Hectorite (HT) clay powder and mung bean starch (MBSt) using Ammonium Persulphate and N’N,-Methylenebisacrylamide as initiator and crosslinker, respectively. The aim of this study is to prepare a hydrogel composite using Hectorite clay as the reinforcement and to study the effect of Hectorite clay on the thermal properties of the composite. FTIR analysis confirmed that the grafting polymerization took place among acrylic acid, polystyrene, mung bean starch and Hectorite clay. From DSC ad TGA analysis, the glass transition temperature (Tg) increased and the weight loss of the composite reduced upon incorporation of Hectorite clay.

scholarly journals Acid Treatment Halloysite Nanoclay: Eco-Friendly Heterogeneous Catalyst for the Synthesis of Pyrrole Derivatives

Proceedings ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 17
Author(s):  
Ali Maleki ◽  
Zoleikha Hajizadeh
Keyword(s):  
Infrared Spectroscopy ◽  
Acid Treatment ◽  
High Efficiency ◽  
Fourier Transforms ◽  
Halloysite Nanotubes ◽  
Hydroxyl Groups ◽  
Simple Method ◽  
Pyrrole Derivatives ◽  
Ft Ir ◽  
Fourier Transforms Infrared Spectroscopy

In this study, halloysite nanotubes (HNTs) as a green and available nano-mineral were used. The hydroxyl groups of HNTs were increased by acid treatment. So, the efficiency of HNTs was improved. The catalyst application of acid treatment HNTs was investigated in the synthesis of pyrrole as an important heterocycle compound. The catalyst was characterized by Fourier transforms infrared spectroscopy (FT-IR). Easy and simple method, high efficiency and eco-friendly are the advantages of this report.

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