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The mounting environmental concerns surrounding conventional plastics have propelled the exploration of alternative materials that can alleviate the strain on landfills and prevent the further proliferation of oceanic waste. Polylactic acid (PLA) bioplastics have emerged as a promising solution, offering potential benefits in reducing both landfill burden and oceanic pollution.
Reducing Landfill Overflow: One significant advantage of PLA bioplastics lies in their biodegradability. Derived from renewable sources such as cornstarch or sugarcane, PLA bioplastics can break down more readily than traditional plastics, reducing the strain on landfills. Unlike conventional plastics that can persist for hundreds of years, PLA bioplastics degrade within a few years, thus mitigating the issue of landfill overflow.
Preventing Oceanic Pollution: The detrimental impact of plastic waste on marine ecosystems is undeniable. Traditional plastics, when not disposed of properly, find their way into water bodies, polluting marine environments and harming aquatic life. PLA bioplastics offer a potential solution by degrading into harmless components when exposed to the natural environment. This characteristic minimizes the potential for long-lasting pollution in oceans, helping to preserve marine ecosystems.
Challenges and Considerations: While PLA bioplastics present significant advantages, challenges remain. Their biodegradability depends on specific conditions, such as temperature and microbial activity, which might not be consistently met in various disposal scenarios. Additionally, the production of PLA bioplastics requires land and resources that could compete with food production, warranting careful evaluation of the overall environmental impact.
Graphene-based materials in bioplastics
Graphene was characterized for the first time in 2004 and although it is not a new object, before its discovery there was a strong debate related to the existence of carbon in a stable 2D form (Zhen and Zhu, 2018). It is a single-layer hexagonal lattice made from carbon atoms and has many applications, all determined by its physical, chemical, and electronic properties. For example, graphene has a thickness of 0.35 nm with a 97.7 % transparency, a planar density of 0.77 mg/m2, a high mechanical
In general, Pla bioplastics are polymers derived from renewable sources (e.g. polysaccharides), fats, oils, proteins (e.g. gelatin and gluten), or plant/microbial polyesters. In the right conditions, these bioplastics are biodegradable and even compostable and can be recycled through biological processes (Ashter, 2016; Karimi-Maleh et al., 2020b). The first biodegradable plastics of bio-origin were discovered in 1862. This material was made of cellulose nitrate. Due to its high adaptability, it attracted public attention, but as a result of its high production cost, it was not commercialized (Sharma et al., 2020; Karimi-Maleh et al., 2021b). Discovered in the 1920–1930 period, corn-derived poly-lactic acid (PLA), and microorganism-derived poly-hydroxybutyrate (PHB) are two of the most important compounds that are widely used in the industry today (Vu et al., 2020). In the United States, about 140,000 tons of PLA have produced annually (Mannina et al., 2019).
What Are Photochromic Lenses?
"AUTO SHADZ"
Photochromic lenses are one of your options when selecting eyeglasses. They’re the type of lens that transitions to a darker color when exposed to the sun or other sources of UV light.
Other names for photochromic lenses include:
- Hemp Shadz
- Light adaptive lenses
- Variable tint lenses
What Are Photochromic Lenses Used For?
Photochromic lenses are ideal for people who need to wear glasses all of the time. The two main purposes of photochromic lenses are to protect your eyes from UV light and to eliminate the need for a separate pair of prescription sunglasses.
The lenses provide complete protection from UVA and UVB rays at all times. This protective feature doesn’t depend on whether the lenses are clear or dark at any given moment.
UVA and UVB rays are the two types of UV light that can get through Earth’s atmosphere. They’re the main types that should concern you when it comes to your health.
How Can UV Light Damage Your Eyes?
You’re repeatedly exposed to UV light throughout your lifetime, mainly in the form of sunlight. Over the course of your life, UV light can damage your eyes and the skin that surrounds them. This means that it’s important to protect your eyes by using products like photochromic lenses installed into a hemp bioplastic frame.
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