Natural filler biocomposites are better than other kind of fillers, because most of them are synthetics. A bicomposite is a compound formed by a matrix (resin) and a reinforcement of natural fibers. Environmental concern, derived from growing global pollution and climate change, added to the high cost of synthetic fibers, have led researchers to use natural fiber as a compound. Crop-derived firms are widely used.

The use of natural filler biocomposites is growing rapidly thanks to the enormous benefits it provides to a multitude of industries, such as the automotive, military, aerospace and construction industries, among others. This is because they have great benefits, since they are renewable, biodegradable, recyclable and, above all, cheaper, which is what most often determines the decision to use or not certain materials and, in this case, play our game. Since, the use of sustainable materials affects all humanity. In addition, they are beneficial for health, safer to produce and have a lower weight than less ecological alternatives.

Natural filler biocomposites are usually classified between those that do not come from wood and those that do come from wood. Fibers that do not come from wood tend to be of greater interest to the industry, since they are more demanding than those that come from wood, regardless of whether it is recycled wood or not. This is because they can attract water molecules and swell, affecting mechanical properties and loss of stability. Non-wood natural fibers are divided into straw, bast, leaf, seed or fruit fibers, and grass fibers. To name some of the most used, they are: flax, jute and hemp, among others. Wood fibers are divided into those that come from soft or hard woods and those that are recycled, which can come from newspapers, magazines, etc. Finally, we wanted to name those known as green composites, which are those that combine natural fibers and biodegradable resins, being one of the most demanded ecological compounds.

Natural Filler Biocomposites