Bioplastics as a Renewable Source for Packaging

Harshada M. Patil¹, Akash S. Jain², Divakar R. Patil³, Azam Z. Shaikh⁴, Sameer R. Shaikh⁵, Hitendra S. Chaudhari⁶, S. P. Pawar⁷

¹Student of Final Year B. Pharmacy, P.S.G.V.P. Mandal’s College of Pharmacy, Shahada, India.

^2,3,4,5,6Asssistant Professors, P.S.G.V.P. Mandal’s College of Pharmacy, Shahada, India.

⁷Principle P.G.V.P. Mandal’s College of Pharmacy, Shahada, India.

*Corresponding Author E-mail: harshadapatil9834046@gmail.com

Abstract:

The packaging industry is undergoing a major evolution as the focus shifts toward sustainability and the adoption of eco-friendly materials and practices. Bioplastics have developed as a viable alternative to conventional plastics, providing enhanced functionality and environmental advantages for many applications, particularly in the food and pharmaceutical sectors This analysis explores the effects of bioplastics on packaging, focusing on the materials' enhanced properties, sustainability, and adherence to stringent standards. Through the extension pharmaceutical items’ shelf life, this enhanced barrier performance reduces waste and guarantees product safety. Furthermore, bioplastics have good biodegradability, which lessens their influence on the environment by dissolving into harmless molecules in natural environments. Another advantage of using bioplastics in packaging is that they lower carbon emissions. Bioplastics contribute to the global fight against climate change since they are produced with fewer greenhouse gas emissions than regular plastics. Bioplastics may also be recycled and reused, which reduces waste and helps preserve natural resources. Additionally, bioplastics can be designed to satisfy specific regulatory standards, ensuring their suitability for a variety of applications. Although bioplastics have many advantages, there remain barriers preventing their widespread application. These consist of higher production costs, limited availability, and the need for specialised recycling facilities. But with to advancements in bioplastic technology and growing consumer demand for eco-friendly substitutes, these problems should soon be rectified.  Future living is anticipated to be significantly impacted by bioplastics as attempts are made to reduce global warming and promote sustainable practices.

KEYWORDS: Biodegradable bioplastics, Bio-based bioplastics, Recyclability of bioplastics, Packaging.

INTRODUCTION:

Products are frequently packaged using plastics¹. Since the 1950s, 8.3 billion tonnes of plastic have been created, of which about 79% have ended up as environmental garbage². Plastics are essential to numerous industries, particularly packaging, which accounted for 44% of the market in 2021. Other important industries are agricultural (4%), electronics (7%), home and leisure (7%), automotive (8%), construction (18%), and others (12%). The global plastics market is expected to expand at a 3.5% CAGR despite increased environmental concerns³.

Fig.1. Chart showing the percentage use of plastics in different sectors of daily life

More than 6,300 million tonnes of plastic garbage have been generated since their creation. Just 9% has been recycled, 12% has been burned, and 79% has ended up in the environment or landfills ⁴. Plastics are prized for their affordability and practicality, but public opinion is changing due to increased environmental concerns ⁵ . Demand for sustainable alternatives has surged due to growing worries about non-biodegradable plastics, particularly in the pharmaceutical industry. Chemicals linked to plastic provide major health hazards, such as diabetes, cancer, heart disease, and infertility ⁶. Waste is converted into sustainable polymers through recycling, which helps address the plastics issue ⁷. Polymer recycling aims to create environmentally friendly polymers that function effectively and satisfy quality requirements ⁸. Recycling polymers reduces the need for fossil fuels since the manufacture of virgin plastic slows down, but deterioration from chemical contaminants and processing procedures like washing and extrusion diminishes the quality of recovered plastics and shortens the recycling cycle ^9,10. Polyethylene terephthalate, high-density polyethylene, low-density polyethylene, polypropylene, polystyrene, and polycarbonates are the most widely used plastics¹¹.

Researchers want to solve today's environmental problems by creating bioplastics that are either biobased, biodegradable, or both¹². Bioplastics reduce pollution by lowering greenhouse gas emissions and are produced more quickly than conventional plastics^13,14. Natural materials such as cellulose, starch, and vegetable oil are used to make bioplastics. Some are recyclable or biodegradable and are utilised in packaging, medical equipment, agriculture, hygiene, and even the body for medicine administration and implants¹⁵. A greener substitute for petroleum-based plastics, bioplastics are created from biodegradable and biobased ingredients and are perfect for a variety of applications, including packaging and biomedicine¹⁶. Although plant-based bioplastics are good, they compete with food supply and are difficult to extract. Accessible and reasonably priced biodegradable plastics are essential for a sustainable future; nevertheless, their use is restricted and may result in problems similar to those of conventional plastics due to a lack of standards, certification, and recycling^17,18. Growing environmental consciousness is driving up demand for bioplastics. Although they account for only 1% of all polymers produced worldwide, their market is growing significantly across all industries¹⁹.

This article discusses the use of bioplastics and biocomposites in pharmaceutical packaging, medicine, and the sustainable integration of natural fibres.

Bioplastics: A Sustainable Substitute for Bioplastic:

Bioplastics are composed of biodegradable or biological ingredients, such as corn starch, feed scraps, or even agricultural leftovers, which decompose more quickly than petroleum-based polymers²⁰. Bioplastics can break down naturally and are derived from microorganisms or plants. In 1862, parkesine, the first synthetic bioplastic, was created from cellulose²¹.

Polymers can be grouped by degradability and source:

· Fossil-based biodegradable: PVA, PBS, PE adipate

· Fossil-based non-degradable: polyolefins, PVC, PET, PS

· Bio-based biodegradable: cellulose, starch, polypeptides, PLA

· Bio-based non-degradable: natural rubber, polyolefins, polyurethanes, polyamides²².

After being treated with additives, oil or gas polymers are moulded, cooled, and completed. Plant starches or fermented sugars are used in bioplastics in a similar manner, while microalgae-based bioplastics provide a more sustainable, circular economy strategy²³. While many bioplastics can be composted at home and break down rapidly, others need to be composted in an industrial setting and are subject to international certification requirements²⁴.

An Overview of the Several Kinds of Bioplastics:

1.Polylactic acid (PLA): PLA, a biodegradable thermoplastic polyester derived from fermented plant sugars and starches, finds application in drug delivery systems, membranes, tissue scaffolds, medical implants, and sutures²⁵. Researchers produced PLA/nano-CaCO₃ bioplastic sheets from Achatina fulica snail shells via solvent casting, which demonstrated enhanced mechanical and thermal qualities for use in packaging²⁶. PLA blends were used to mould single-dose strips; ternary PLA–PCL–PBSA blends worked best for injection moulding because of their strength, flexibility, and resistance to impact²⁷.

2.Poly-3-hydroxybutyrate: A biodegradable bioplastic, polyhydroxyalkanoate (PHA) is produced from renewable resources through a two-phase fermentation process that involves biomass growth and PHA buildup under nutrient limitation²⁸. By adding cellulose nanofibers and ZnO/plasma treatment, researchers improved the strength and antibacterial qualities of poly(3-hydroxybutyrate), making it a sustainable choice for food packaging²⁹.

3.Polyamide 11 or Nylon 11: Polyamide 11, a nylon made from 11-aminoundecanoic acid produced from castor oil, is valuable both environmentally and industrially due to its exceptional chemical and mechanical resilience³⁰. By hydrolysing the ester, PBS breaks down into tiny pieces (less than 500 Da), which microorganisms then transform into CO₂, water, and biomass. At room temperature, the semi-crystalline PA11 remains rigid, but as the hard amorphous portion devitrifies at higher temperatures, it softens. Its Tg is 43°C³¹.

4.Polyhydroxyurethanes: Polyhydroxyurethanes are a viable, sustainable material for pharmaceutical packaging because of their strong mechanics, biodegradability, and controlled drug release; nevertheless, more research is required³². Polyhydroxyurethane bioplastics provide a safe, sustainable substitute for pharmaceutical packaging made of petroleum thanks to their robust mechanics, barrier qualities, and biodegradability³³.

5.Biopolymers based on cellulose: In 1886, Brown documented that Acetobacter (now Gluconacetobacter) xylinus used glucose to produce cellulose. Cotton and plants are rich sources of cellulose, the most prevalent biopolymer in the world with special qualities for material creation³⁴. High strength, durability, and biodegradability are characteristics of cellulose biopolymers, which are being researched as bio-fillers to increase the biodegradability of polymers³⁵.

6.Biopolymer based on protein and lipid: Plant proteins like wheat gluten, corn, soy, and zein, as well as animal proteins like casein, whey, keratin, and gelatin, are used in protein-based coatings³⁶. Because of their exceptional gas barrier qualities, proteins are very useful biopolymers. In comparison to methyl cellulose, starch, polyethylene, and pectin, soy protein films decrease oxygen permeability by 260–670 times. They also have better mechanical qualities than films made of lipids or polysaccharides³⁷. Protein-based coatings provide protective, biocompatible packaging, while whey protein biopolymers in active packaging improve food safety and shelf life by releasing antimicrobials³⁸. During breakdown, protein-based films can provide nitrogen as fertiliser, which is a feature that non-protein films do not have³⁹.

7.Polyhydroxy alkanoate: Bacteria create PHAs, which are biodegradable aliphatic polyesters made up of infinite copolymer combinations and more than 91 polyhydroxy alkanoic acid components. Although they provide a closed-loop substitute for single-use plastics and decompose in a variety of settings, industrial uses such as bottles and packaging are still scarce⁴⁰. PHAs, which are biodegradable aliphatic polyesters composed of over 91 polyhydroxy alkanoic acid components and an endless number of copolymer combinations, are produced by bacteria. Industrial applications like bottles and packaging are still rare, despite the fact that they offer a closed-loop alternative to single-use plastics and disintegrate in a range of environments⁴¹, as well as tissue scaffolds, which include brain regeneration^42,43.

8.Cellulose acetate (CA): It's a natural polymer that has been chemically altered for use, making it semi-synthetic ⁴⁴. The majority of cellulose comes from wood pulping and is transformed into ethers, esters, rayon, and cellophane for use in moulding, gums, films, and fibres⁴⁵. Double-crosslinked cellulose nanofibers were used in a study to create robust, environmentally friendly bioplastic films that are very stable and long-lasting. As eco-friendly plastic substitutes, cellulose acetate and glucaric acid increase strength, flexibility, and sustainability⁴⁶. Cellulose acetate polymers provide strength, transparency, colourability, and quick low-energy moulding in contrast to energy-intensive standard plastic processes. They may also be recycled or burned residue-free in a matter of years⁴⁷.

9.Bio-based polyethylene terephthalate (Bio-PET): The manufacturing of bio-PET, a transparent, semi-crystalline resin used in packaging and textiles, is still not commercially viable. It comes from renewable resources in part⁴⁸. Terephthalic acid (TPA) and ethylene glycol (EG) are polycondensed to create PET, a thermoplastic polyester that finds extensive application in textiles and packaging. Petroleum-based TPA and bio-based EG are used in bio-PET, which is partially bio-based with roughly 20% bio-carbon⁴⁹. PET packaging is becoming more and more popular for food and drink packaging because of its strength, transparency, light weight, stability, non-reactivity, affordability, and superior barrier and pressure resistance⁵⁰.

The Bioplastic’s Physicochemical Characteristics:

The following characteristics are common to most bioplastics, though they can vary:

1. Mechanical Properties: Bioplastics differ in their hardness, elasticity, flexibility, and tensile strength. Generally speaking, they are not as strong as polyethylene or polypropylene. The starch-based polyhydroxyalkanoates are brittle, whereas the polyhydroxybutyrate is tougher but more brittle than polylactic acid⁵¹.

(a) Tensile Properties: An important mechanical test for polymers is tensile testing, often known as tension testing, which gauges the behaviour of stress-strain under pulling forces. It applies controlled strain till failure to assess elongation at break, Young's modulus, and tensile strength⁵².

(b) Flexural Properties: The flexural (transverse beam) test analyses load, Young's modulus, strength, and deflection at break under bending stress to determine the appropriateness of composites for structural usage⁵³.

(c) Impact Properties: Impact tests, such as Charpy or Izod, assess a material's toughness, impact strength, and notch sensitivity to determine how well it can withstand high-rate loading⁵⁴. A measure of toughness is the total amount of energy absorbed per unit volume of material before it ruptures. The full area under the stress-strain curve can be calculated to find its value⁵⁵.

(d) Hardness: A material's hardness reflects wear and tear by demonstrating its resistance to plastic deformation, abrasion, indentation, and scratching. Rockwell, Vickers, Brinell, or Shore hardness testing techniques can be used to determine surface hardness^56,57.

2. Barrier Properties: Since bioplastics, particularly PLA and starch-based varieties, have considerable water and gas permeability, their use as long-term food packaging materials that need robust moisture and gas barriers is limited⁵⁸.

3. Thermal Properties: Under a 100mL/min dry nitrogen flow, the thermal stability and degradation of bioplastic films were investigated using a TGA (Thermal Universal V 4.5 A) from 30 to 600°C at 10°C/min⁵⁹.

4. Optical Properties: A Cary 6000i UV–vis-NIR spectrophotometer was used to assess the transmittance of bioplastic sheets (200–800nm) using 150μm samples in a 2 × 2cm holder, with reference to an empty holder (100% transmittance)⁶⁰.

5. Density: Bioplastics typically have lower densities than traditional plastics, which might impact their mechanical and processing qualities. PLA, for example, has a density of roughly 1.25g/cm³ ⁶¹.

Bioplastics Market:

Bio-based bioplastics are ranked highest on the "plastic spectrum" for their compostability, biodegradability, and renewable nature. Their short lifespan makes them ideal for packaging, but their special qualities allow for biomedical applications like as tissue scaffolds, screws, bone plates, and medication delivery⁶². Bioplastics are utilised in cosmetic and medical packaging. Modifying bio-based, biodegradable polymers to satisfy cosmetic preservation requirements while preserving sustainability and biodegradability is the main goal of research ⁶³. Both rigid and flexible packaging uses bio-based polymers, such as PLA, PHAs, and polysaccharides. Nanocellulose finds expanding uses in cosmetics and medicine for anti-aging, coatings, and hair care, while bioplastics in nanoparticles enhance barrier qualities⁶⁴.

The global market for bioplastics expands by 20–25% a year⁶⁵. Bioplastic manufacturing is increasing due to consumer demand and sophisticated uses; by 2028, worldwide capacity is predicted to increase from 2.18million tonnes in 2023 to 7.43million tonnes⁶⁶. Global bioplastic output in 2022 and 2028 is depicted in Fig. 2.

Fig.2. Global Production capacities of bioplastics 2023-2028.

Bioplastic’s Biodegradability: -

Microorganisms completely break down biodegradable polymers, generating CO₂, water, and biomass anaerobically and CO₂, water, and methane aerobically⁶⁷. Bioplastics break down through the use of endo- and exo-enzymes to depolymerise polymers in prokaryotic and eukaryotic microorganisms. The fact that biodegradation leftovers are typically innocuous to living things is a major advantage of abiotic degradation, which breaks chains⁶⁸.

Not all biobased plastic decomposes naturally. The biodegradability of TPS, PLA, and PHA is higher than that of bio-PE, bio-PET, and PEF. Chemicals, microbes, and material characteristics such as crystallinity affect full biodegradation⁶⁹. The type of material, additives, and disposal circumstances all affect how biodegradable bioplastics are. Bioplastics made from natural sources, such as cellulose or starch, break down more readily than those made with additives or blended ingredients⁷⁰. Composting is an environmentally responsible way to get rid of bioplastics, and studies have shown that different kinds of bioplastics break down well in compost (see Table.1.)⁷¹.

Bioplastics	Feedstock	Temperature/Moisture Contents	Biodegradability   in Percentage	Composting Time Frame (Days)
Starch-based (potato starch)	Compost	Aerobic, 58 °C	85%	90
Plastarch Material (PSM)	Compost	Aerobic, 55 °C, 60%	50%	85
Starch-based blends	Compost/Food        waste	45–65 °C	60%	90
PLA	Compost	58 °C, 60%	60%	30
PLA +Clay film	Compost	Aerobic, 58 °C, 55%	34%	130
PHA-based	Compost	55 °C, 70%	80%	28
PHAs blends	Compost/ Cow manure	50 °C	30%	60
Cellulose-based	Compost containing synthetic material	Aerobic, 58 °C	>80%	154
Sponge cloth (Cellulose-based)	Compost	Aerobic, 58 °C	80%	154
Nylon4 (polyamides, bio-based)	Composted soil	25 °C, pH 7.5–7.6, 80%	100%	120

Recyclability of Bioplastics:

Recyclability is essential in the circular economy, however bioplastics have problems because bioplastic recovery techniques are still being developed, while traditional plastics have established recycling infrastructure ^[72]. Chemical, mechanical, and enzymatic/microbiological techniques are all used in plastic recycling. The most popular recycling method is mechanical recycling, which is the main recovery process and physically processes garbage to create reusable plastic components⁷³. Collected, sorted, ground, cleaned, dried, extruded, and granulated, mechanical recycling is easier, less expensive, and more environmentally friendly. A developing technology called chemical recycling uses techniques like solvolysis or dry-heat depolymerisation to convert trash into reusable monomers or oligomers for fresh polymerisation^74,75,76.

CONCLUSION:

In conclusion, the application of bioplastics in packaging has the potential to completely transform the pharmaceutical sectors by providing environmentally friendly substitutes for traditional polymers derived from petroleum. Bioplastics minimise environmental impact while meeting the strict standards of contemporary packaging by utilising renewable resources and state of the art technologies.  Around 2.4 million tonnes of bioplastics were produced worldwide in 2021, and as industries shift to more sustainable materials, this amount is predicted to rise.  Nearly 48% of all bioplastics are consumed in the packaging industry alone, which reflects the rising demand for environmentally friendly products.  Because of their versatility, biodegradability, and suitability for delicate items, bioplastics are a great option for upholding product integrity and environmental stewardship. The emergence of bioplastics is indicative of a larger movement towards a more sustainable future as sustainability gains traction across industries and consumer tastes shift in favour of eco-friendly products.

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Received on 01.04.2026     Revised on 05.05.2026

Accepted on 30.05.2026   Published on 14.07.2026

Available online from July 25, 2026

Research J. Science and Tech. 2026; 18(3):261-268.

DOI: 10.52711/2349-2988.2026.00036

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