Publications by authors named "Bianca-Ioana Dogaru"
Increasing interest on sustainable agriculture has led to the development of new materials which can be used as seed coating agents. In this study, a new material was developed based on gelatin film reinforced with cellulose nanocrystals (CNC) which was further used as nanocomposite matrix for KUEN 1585 spores. The nanocomposite films were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM), showing the formation of new hydrogen bonds between the components with a good compatibility between them.
View Article and Find Full Text PDFBiobased materials present a great interest due to their properties and biodegradability. Cellulose nanocrystals (CNC) nanofiller, in various amounts, was incorporated into a carboxymethyl cellulose (CMC)-glycerol (G) matrix in order to obtain nanocomposite systems with improved properties. The effect of the nanofiller on the structural features was investigated by Fourier transform infrared (FT-IR) spectroscopy, principal component analysis (PCA), two-dimensional correlation spectroscopy (2D-COS), and X-ray diffraction, while the sorption properties were evaluated by water vapor isotherms using the gravimetric method coupled with infrared spectroscopy.
View Article and Find Full Text PDFDue to ecological reason, in the last period there is an increased interest for changing the synthetic based materials with biodegradable ones. In this study, we prepared bio-nanocomposite formulations based on κ-Carrageenan (κ) and bentonite nanoclay (BT) with different component concentrations (0% BT, 5% BT, 10% BT and 15% BT respectively) and investigated their structural features, with focus on the interactions, sorption properties, and how the combination between them influences these properties. By infrared spectroscopy was identified that in the blending process hydrogen bonds and/or electrostatic interactions may have occurred between BT and κ.
View Article and Find Full Text PDFArticle Synopsis
- There is a growing interest in replacing synthetic materials with biodegradable options, particularly using natural polymers like polysaccharides and proteins.
- This research focused on creating bio-nanocomposites with varying concentrations to study their interactions and properties using techniques like infrared spectroscopy and principal component analysis.
- Findings revealed that increasing the content of cellulose nanocrystals (CNCs) in the formulations reduced water absorption and sorption properties, while also increasing the water contact angle, indicating stronger hydrogen bonding due to free hydroxyl groups.
Article Synopsis
- Researchers created nanocomposite films by combining cellulose nanocrystals (CNC) with a poly(vinyl alcohol) (PVA) and starch (S) blend using the solution casting technique.
- They tested different compositions of PVA and S to see how different amounts of CNC affected the films' structure and properties, using methods like infrared spectroscopy and X-ray diffraction.
- The study found that the addition of CNC and variations in PVA/S ratios significantly influenced the films' crystallinity, structural interactions, and surface roughness.