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What is Biopolymer?


Biopolymers are synthetic polymers made from biological sources. These can either be biosynthesized by live organisms or chemically synthesized from biological ingredients. These are composed of monomeric components that are covalently bound together. Larger molecules are created by these monomeric units. Biopolymers are a sustainable resource since they are made from living things like plants and bacteria, in contrast to most polymers, which are made from petroleum. Biopolymers are typically biodegradable. Given their abundance, biocompatibility, and special qualities like non-toxicity, etc., biopolymers are intriguing materials.


How is Biopolymer made?


To produce biopolymers, microorganisms require a specific combination of nutrients as well as a regulated environment. They can be produced either directly through fermentation or inadvertently via the chemical polymerization of monomers, which are produced via fermentation. Most biopolymers are biocompatible and have no detrimental effects on biological systems. It is believed that bacteria create biopolymers as a kind of storage or as part of their defense mechanism.


Enzymes, bacteria, and other natural processes can break them down before they are reabsorbed into the environment. A biopolymer, also known as an organic plastic, is a type of plastic produced using sustainable biomass sources including vegetable oil, maize starch, pea starch, and others.


Biopolymer uses/forms


Biopolymer is used in various places like-


Vascular Grafts
Diagnostic Devices
Drug Delivery


Types of Biopolymers


Cellulose based polymer


The primary structural element of plants, cellulose, is a polymeric raw material that is practically infinitely abundant and has a unique structure and set of features. More than 150 years have passed since cellulose was first used as a construction material. However, due to its high degree of crystalline (between 40% and 60%) and strong intermolecular and intermolecular hydrogen bonding between the various chains, it is not soluble in water in its native condition. To create water-soluble cellulose ester or ether derivatives, cellulose is chemically changed.


Synthetic Materials

The term "synthetic biopolymers" refers to polymers that have either been chemically synthesized from synthetic monomers in a way that permits them to naturally degrade without leaving behind any residues that are harmful to the living or natural environments, or that have had natural polymers altered in some way. Synthetic biopolymers have received a lot of attention recently due to their inherent advantages over natural polymers in terms of durability and flexibility to suit a variety of applications. However, synthetic biopolymers are preferred over synthetic polymers because of their biodegradable characteristics and environmental safety. Thanks to advancements in new molecular designing tools and polymer chemistry, synthetic biopolymer synthesis can now be tailored to fit any purpose.
Starch based polymer
Starch-based biopolymers are essential in the displacement of petrochemical-based plastics in the field of polymers. They make excellent candidates for usage in a multitude of applications, including the packaging industry, because to their biocompatibility, lack of toxicity and similar mechanical and deteriorating properties. Bio-composites are made by chemically altering starch derived from various agricultural wastes in the presence of plasticizers and other chemical moieties. These bio-polymers can break down naturally.
Sugar based polymer
The synthesis of polymeric materials has attracted considerable interest in recent years due to the exact control of the architecture, stereochemistry, and content. When compared to synthetic building blocks, sugar units exhibit distinctive in vivo degrading characteristics, inherent tenability, and amusement. Linear sugars have varying amounts of hydroxyl groups, and these groups can be used as conjugation sites for polymer decorating. Additionally, the precise 3D shape and spatial arrangement of conjugated moieties are determined by the stereochemistry of the hydroxyl groups. What's more exciting is that the ratio of D to L sugar enantiomers can be changed to customize the polymer breakdown profile because only the dextrorotary (D) form of sugars can be metabolized by humans.
Blow Film
Another extrusion technique used to produce film goods is blowing film. In this instance, the film is extended using an air pressure and circular extrusion die. One or more polymers are repeatedly melted in a circular die to create a hollow tube. Air causes the tube to initially expand, after which it eventually coils and collapses. The material is eventually flattened using pressure rollers. The material first runs through a few further rollers before the renowned trimming rollers, which cut the corners to make two sheets of film that, are then wound onto reels.
Benefits of Biopolymers
Easily Available
Environment Friendly
Naturally Obtained