Poly (3-hydroxybutyrate)/cellulose nanocrystal films for food packaging applications: Barrier and migration studies

2015 ◽  
Vol 55 (10) ◽  
pp. 2388-2395 ◽  
Author(s):  
Prodyut Dhar ◽  
Umesh Bhardwaj ◽  
Amit Kumar ◽  
Vimal Katiyar
Keyword(s):  
Food Packaging ◽  
Cellulose Nanocrystal ◽  
Migration Studies ◽  
Nanocrystal Films ◽  
And Migration

scholarly journals Identification and Migration Studies of Photolytic Decomposition Products of UV-Photoinitiators in Food Packaging

Molecules ◽  
2019 ◽  
Vol 24 (19) ◽  
pp. 3592 ◽  
Author(s):  
Joseph B. Scarsella ◽  
Nan Zhang ◽  
Thomas G. Hartman
Keyword(s):  
Mass Spectrometry ◽  
Food Packaging ◽  
Chemical Species ◽  
Gas Chromatography Mass Spectrometry ◽  
Migration Studies ◽  
Decomposition Products ◽  
Uv Curable ◽  
Migration Potential ◽  
Photolytic Decomposition ◽  
And Migration

UV-curable inks, coatings, and adhesives are being increasingly used in food packaging systems. When exposed to UV energy, UV-photoinitiators (PI’s) present in the formulations produce free radicals which catalyze polymerization of monomers and pre-polymers into resins. In addition to photopolymerization, other free radical reactions occur in these systems resulting in the formation of chemically varied photolytic decomposition products, many of which are low molecular weight chemical species with high migration potential. This research conducted model experiments in which 24 commonly used PI’s were exposed to UV-energy at the typical upper limit of commercial UV-printing press conditions. UV-irradiated PI’s were analyzed by gas chromatography-mass spectrometry (GC-MS) and electrospray-mass spectrometry (ESI-MS) in order to identify photolytic decomposition products. Subsequently, migration studies of 258 UV-cure food packaging samples were conducted using GC-MS; PI’s and photolytic decomposition products were found in nearly all samples analyzed. One hundred-thirteen photolytic decomposition products were identified. Eighteen intact PI’s and 21 photolytic decomposition products were observed as migrants from the 258 samples analyzed, and these were evaluated for frequency of occurrence and migratory concentration range. The most commonly observed PI’s were 2-hydroxy-2-methylpropiophenone and benzophenone. The most commonly observed photolytic decomposition products were 2,4,6-trimethylbenzaldehyde and 1-phenyl-2-butanone. This compilation of PI photolytic decomposition data and associated migration data will aid industry in identifying and tracing non-intentionally added substances (NIAS) in food packaging materials.

Composition of the adhesives used in food packaging multilayer materials and migration studies from packaging to food

2011 ◽  
Vol 21 (12) ◽  
pp. 4358 ◽  
Author(s):  
Margarita Aznar ◽  
Paula Vera ◽  
Elena Canellas ◽  
Cristina Nerín ◽  
Peter Mercea ◽  
...  
Keyword(s):  
Food Packaging ◽  
Migration Studies ◽  
And Migration ◽  
Multilayer Materials

Biomimetic Optical Cellulose Nanocrystal Films with Controllable Iridescent Color and Environmental Stimuli-Responsive Chromism

2018 ◽  
Vol 10 (6) ◽  
pp. 5805-5811 ◽  
Author(s):  
Yao-Dong He ◽  
Ze-Lian Zhang ◽  
Juan Xue ◽  
Xiao-Hui Wang ◽  
Fei Song ◽  
...  
Keyword(s):  
Cellulose Nanocrystal ◽  
Stimuli Responsive ◽  
Environmental Stimuli ◽  
Nanocrystal Films

Solid-state 23Na NMR spectroscopy studies of ordered and disordered cellulose nanocrystal films

2019 ◽  
Vol 97 ◽  
pp. 31-39 ◽  
Author(s):  
Ryutaro Ohashi ◽  
Carl A. Michal ◽  
Wadood Y. Hamad ◽  
Thanh-Dinh Nguyen ◽  
Motohiro Mizuno ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Cellulose Nanocrystal ◽  
Nanocrystal Films ◽  
Spectroscopy Studies ◽  
23Na Nmr

scholarly journals Intersectional Discrimination: Definition, Scope, and Migration Research from the perspective of Intersectionality

2021 ◽  
Vol 9 (22) ◽  
Keyword(s):  
Culturally Diverse ◽  
Historical Background ◽  
Future Research ◽  
Migration Studies ◽  
Social Psychological ◽  
Migration Research ◽  
The Social ◽  
Conducting Research ◽  
And Gender ◽  
And Migration

Along with the widespread rise in immigration and the increase in the number of immigrants, academic interest in migration research has also grown. Although there are many studies conducted in various fields, the number of studies who approached migration from an intersectional perspective is rather small. The number of studies approaching migration and the social psychological processes of migrants from the perspective of intersectionality is even smaller in Turkey. Considering the large number of immigrants in Turkey, it is obviously essential to understand and study intersectionality in these particular contexts. Therefore, this article is written to explicate the concept of intersectionality and review migration studies adopting an intersectional approach. The basis of the concept of intersectionality, historical background that led to the birth of it, its subtypes as well as the importance of race, class and gender in intersectionality are among the issues discussed in this article. Moreover, with respect to migration studies from the perspective of intersectionality, studies conducted in various culturally diverse countries are outlined. The last but not the least, the prominence of conducting research on intersectionality in the Turkish context is also emphasized. In this review, we aim to present the literature to students and academics in the field as well as to provide direction for future research. Keywords: Migration, intersectionality, intersectional discrimination

Microelectromechanical Systems from Aligned Cellulose Nanocrystal Films

2018 ◽  
Vol 10 (28) ◽  
pp. 24116-24123 ◽  
Author(s):  
Partha Saha ◽  
Naveed Ansari ◽  
Christopher L. Kitchens ◽  
W. Robert Ashurst ◽  
Virginia A. Davis
Keyword(s):  
Microelectromechanical Systems ◽  
Cellulose Nanocrystal ◽  
Nanocrystal Films
Sign in / Sign up

Export Citation Format

Share Document