Related Experiment Video
Updated: Feb 7, 2026
08:46
Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
5.7K
Optimizing electric corona treatment for hydroxypropylated starch-based coatings.
Johanna Lyytikäinen1, Sami-Seppo Ovaska1, Ekaterina Soboleva2
1Lappeenranta University of Technology, LUT Energy Systems, Packaging Technology, P.O. Box 20, FI-53851 Lappeenranta, Finland.
Carbohydrate Polymers
|July 16, 2018
Summary
Plasma corona treatments effectively modify bio-based coatings by altering surface properties. This research optimizes electric discharge for enhanced barrier coatings using starch binders without damaging the material.
Area of Science:
- Materials Science
- Surface Chemistry
- Polymer Science
Background:
- Bio-based dispersion barrier coatings are crucial for sustainable packaging.
- Replacing fossil-based binders with bio-based alternatives like starch is an ongoing challenge.
- Optimizing surface modification techniques is essential for enhancing coating performance.
Purpose of the Study:
- To investigate the effects of direct current and alternating current (plasma) corona treatments on bio-based dispersion barrier coatings.
- To evaluate the suitability of starch as a thermoplastic bio-based binder in these coatings.
- To understand and optimize corona discharge parameters for effective surface modification without substrate damage.
Main Methods:
- Utilized a novel laboratory-scale sheet-fed device for corona treatments.
- Employed Atomic Force Microscopy (AFM) for topographical analysis.
- Conducted X-ray Photoelectron Spectroscopy (XPS), contact angle, and surface energy measurements for chemical and surface property evaluation.
Main Results:
- Corona treatments (both DC and AC plasma) induced significant topographical, mechanical, and chemical surface changes.
- Surface topography became smoother, indicating nanoparticle migration and re-orientation.
- XPS confirmed partial starch decomposition and revealed changes in surface chemistry.
- Contact angle and surface energy measurements demonstrated altered surface properties.
Conclusions:
- Plasma corona treatments are effective in modifying bio-based dispersion barrier coatings with starch binders.
- Optimized corona discharge can enhance surface properties while minimizing substrate damage.
- Further research is needed to fully understand and mitigate reverse side effects and strike-through phenomena.
Related Concept Videos
01:32Pinching-off of Coated Vesicles
4.2K
Vesicle budding is orchestrated by distinct cytosolic proteins such as adaptor proteins, coat proteins, and GTPases. To initiate vesicle budding, membrane-bending proteins containing crescent-shaped BAR domains bind to the lipid heads in the bilayer and distort the membrane to form a protein-coated vesicle bud. Adaptors proteins such as AP2 for clathrin-coated vesicles can nucleate on the deformed membrane. Finally, coat proteins such as clathrin or COPI and COPII assemble into a coat forming...
4.2K
00:48Optimal Foraging
13.9K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
13.9K
01:12Clathrin Coated Vesicles
9.4K
Clathrin-coated vesicles use endocytosis to transport receptors and lysosomal hydrolases from the Golgi to the lysosome in the late secretory pathway. Clathrin-mediated endocytosis was the first described endocytic process, and Clathrin-coated vesicles remain one of the most well-studied transport vesicles. The molecular machinery that generates clathrin-coated vesicles comprises over 50 proteins that precisely coordinate vesicle formation. Cell surface receptors concentrated in indented sites...
9.4K
00:59COP Coated Vesicles
18.2K
Membrane-enclosed structures called vesicles transport proteins and lipids across the cell. The vesicles derive their cargo from the plasma membrane, Golgi, ER, or endosome. Coated vesicles are spherical, protein-coated carriers with a 50–100 nm diameter that mediate bidirectional transport between the ER and the Golgi. The distribution of proteins between the ER and Golgi complex is dynamic and is maintained by different coated vesicles. Their formation is driven by the assembly of...
18.2K
01:33Coat Assembly and GTPases
4.5K
Vesicles incorporate different coat protein subunits in different cell locations, which changes the properties of the coat, such as the shape and geometry of the transport vesicles. Thus, vesicle coat proteins also play a significant role in cargo selection.
Coat assembly depends on the local availability of phosphatidylinositol phosphates or PIPs and GTP-binding proteins. Adaptor proteins, which link the coat proteins to the membrane, bind to these PIPs and play a crucial role in controlling...
Coat assembly depends on the local availability of phosphatidylinositol phosphates or PIPs and GTP-binding proteins. Adaptor proteins, which link the coat proteins to the membrane, bind to these PIPs and play a crucial role in controlling...
4.5K
01:26Optimization Problems
77
Optimization problems often involve identifying maximum or minimum values under specific constraints. A well-known example is determining the longest horizontal pipe that can be moved around a right-angled corner, where a 3-meter-wide hallway meets a 2-meter-wide hallway. This scenario, common in architectural design and industrial transport, can be understood conceptually through geometric and trigonometric reasoning.To visualize the problem, consider the pipe as a straight line that touches...
77