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In agricultural production in many countries, people often use mulch to improve crop yields
.
Recently, researchers at the Fraunhofer Institute for Silicates in Germany are working with European partners to develop sustainable biodegradable mulch papers with a protective hybrid coating
.
Plastic waste not only pollutes the ocean, but also pollutes farmland
.
Films made from petroleum-based polyethylene (PE) must be collected post-harvest, which often leaves a residue
.
Although biodegradable films made from polylactic acid are already available, they are very expensive
.
Biodegradable paper replaces plastic film
Biodegradable paper replaces plastic filmProject partners rely on cellulose paper to develop sustainable films
.
Therefore, a functional coating is needed to stabilize the paper and prevent rapid degradation
.
The researchers explained: "The coating consists of two different components, an organic polymer and an inorganic silicate, which are generally incompatible
.
New Hybrid Covering Paper
New Hybrid Covering PaperIn addition to stabilizing the functional coating, the project partners are developing a completely new hybrid cover paper made of functionalized cellulose and incorporated organic cellulose as well as functionalized nanocellulose, due to its very high aspect ratio, It is characterized by a high inherent stability
.
This involves bonding cellulosic fibers with a mixed polymer binder that acts like a binder to crosslink the individual fibers
.
Mesh density affects stability
.
The binder system effectively acts as a coating
.
Therefore, the hybrid paper does not require additional coatings
.
"The paper should be hydrophobic, i.
e.
waterproof .
In addition, it must be more tear-resistant than normal paper
.
Mechanical stability and UV resistance are important properties, and it should be ploughed after harvest, " the developers explained
.
Optimal performance of composite materials is a practical challenge
.
Once the technology is fully developed, the packaging industry could also benefit from the new material: "Replacement of plastic film with biodegradable paper would make a significant contribution to environmental protection," Ross said
.
The cover paper is produced in a roll-to-roll process
.
But it's not ready, and a lot of testing is needed first, such as the effect of covering with paper film on the growth of tomatoes and other crops
.
We expect this new material to enter the mass production stage as soon as possible, benefiting the world and reducing the pollution of plastic waste to the environment
.
