“…Moreover, biopolymers can be found in nature and daily life, such as natural rubber, starch, cotton, leather, wool, etc. [ 6 , 7 , 8 ]. Biopolymers are renewable, environmentally friendly, or/and biodegradable materials, which can be divided into two broad groups of natural and synthetic ( Figure 1 ) with the following origins [ 9 , 10 , 11 , 12 , 13 ]: - Natural biopolymers extracted from biomass (e.g., polysaccharides, proteins)
- Synthetic biopolymers produced by a micro-organism or bacteria (e.g., bacterial cellulose, polyhydroxyvalerate, polyhydroxybutyrate)
- Synthetic biopolymers synthesized from renewable bio-based monomers or mixed sources of biomass and petroleum (e.g., polylactic acid, aliphatic polyester, aliphatic-aromatic copolyesters)
- Biodegradable polymers that are derived from nonrenewable resources (petroleum sources) (e.g., polycaprolactone)
…”