Nowadays, almost all
plastics are manufactured from petrochemicals derived from fossil fuels and gas
[1]. Approximately
4% of annual petroleum production is converted directly into polymers using
petrochemical feedstock [2]. Plastic
manufacture uses a comparable quantity of fossil fuels since it demands energy[3]. Plastics
play vital roles in modern society, public health, and medicine. Plastics are
heavily used in human society due to their resistance to chemical, physical,
and biological deterioration [4]. This is especially relevant in the
healthcare industry. As with many other modern-day uses of plastics, a basic
benefit in medicine and public health is the versatility of these materials
combined with an exceptionally low cost, allowing the mass production of
disposable single-use health care products that are functional and clean [5]. Plastic
contamination in the natural environment has sparked widespread concern among
scholars and the general population. Organisms can ingest or become entangled
in plastic trash, making it hazardous to the entire environment [6]. Plastics are synthetic or
semi-synthetic organic polymers that are low-cost, lightweight, strong,
long-lasting, and corrosion-resistant [7]. When exposed to UV radiation, they
become brittle, split into small pieces, and finally disintegrate, whether in
direct sunlight or the ocean [8]. However, the actual time necessary
for plastic. The ability to completely decay in the maritime environment is
questionable. The ability to completely decay in the maritime environment
is questionable [9]. Fishing nets, ropes, and plastic
bags are among the many types of plastic rubbish seen in nature [10]. It is estimated that 50% of
plastic products, including silverware, plastic bags, and packaging, are
intended to be disposable [11]. As a result, annual plastic
manufacture has dramatically increased, from 1.5 million in the 1950s to an
estimated 299 million in 2013 [12]. The most common methods for disposing of unwanted
plastics are burning and land filling. However, due to soil and air pollution,
these approaches are drawing increasing social criticism [13].
Furthermore, economic opposition
derives from higher space and disposal costs. As a result, one of the often
used alternate strategies for recycling waste plastics is the recovery of fuel
oil and hydrocarbon feedstock through the thermal or catalytic breakdown of
carbon and hydrogen-containing polymers [14]. Plastic is described as any organic
synthetic or processed substance, primarily thermoplastic or thermosetting
polymers with high molecular weight, that may be molded into objects, films, or
filaments (Merriam-Webster Dictionary) [15]. These synthetic
macromolecular chemicals are mostly sourced from petroleum and are frequently
non-biodegradable. The most common petroleum-based plastics are polyethylene,
PVC, polystyrene, and polyethylene terephthalate (PET) [16]. These polymers
have been widely used in all areas of human activity, establishing plastics as
a really huge industry [17]. The flexible
organic compounds that comprise synthetic plastic are artificial or
semi-artificial in nature. Since the 1940s, synthetic plastics have altered
civilization due to their interesting properties, which include mechanical
strength, light weight, flexibility, and durability. These characteristics are
attributable to a low-cost material that can replace things made of metal, glass,
and paper [18].
Bioplastic synthesis
utilizing water hyacinth as a filler involves combining the plant's
cellulose-rich biomass with biodegradable polymers, such as polylactic acid
(PLA) or polyhydroxyalkanoates (PHA) [19]. The water
hyacinth is first harvested, dried, and processed into a powder or fiber, which
is then mixed with the biopolymer and other additives. The blend is
subsequently extruded or injection-molded to form the desired shape. The
incorporation of water hyacinth filler enhances the bioplastic's mechanical
properties, thermal stability, and biodegradability, while reducing production
costs and environmental impact [20]. The resulting
biocomposite exhibits improved tensile strength, stiffness, and UV resistance,
making it suitable for various applications, including packaging, textiles, and
agricultural mulches. This sustainable approach not only reutilizes invasive
water hyacinth but also contributes to the development of eco-friendly
alternatives to conventional plastics [21].
2.
Materials
and Methods
Potato
peel starch, Glycerol {HOCH2CH(OH)CH2OH}, Starch soluble
(C6H10O5), and Glacial acetic acid (CH3COOH)
(5%), (Merck).
2.1 Sample Collection
In this paper, potato and Eichhornia crassipes
(Water hyacinth) as filler were taken from the stock of Siddhachalam Laboratory
Raipur (C.G.)
2.2 Preparation of Plasticizer
Plasticizers are added
to starch to increase its flexibility because starch on its own is brittle.
Among the common plasticizers is glycerol. These plasticizers increase the
flexibility and processability of starch by breaking down its crystalline
structure.
2.3
Preparation of potato peel starch (PPP)
Potato peel bioplastic (PPP) was
created with somewhat altered techniques of thoroughly cleaning; the peels were
cut into smaller pieces and boiled for 30 minutes with water. The water was
ruined and disposed of, and the peels were blended into a paste. The necessary
amounts of potato peel paste, 5 ml of glacial acetic acid (5%) solution, 5 ml/5
g of plasticizer, and the necessary amount of reinforcing filler Eichhornia crassipes
(water hyacinth) were added to a beaker and carefully agitated in order to
synthesize the bioplastic samples. The mixture was stirred constantly as it
boiled for 20 minutes at 220°C; after that, the cooked mixture was transferred to
an aluminum foil-lined petriplate and left to dry at room temperature.
2.4
Preparing starch-based bioplastic
To prepare the bioplastic samples,
100g of potato peel, 5 ml of glacial acetic acid (5%) solution, and 5ml/5g of
plasticizer were combined. The mixture simmered at 220°C for 20 minutes,
stirring constantly. Following that, the starch-based sample combination was
placed in a furnace and allowed to dry at room temperature for an entire day.
Fig.1: Starch based
Bioplastics
2.5 Characterization method
2.5.1 Moisture
content
Weighing bioplastic samples
measuring 6 cm2 allowed us to determine the initial weight (W1).
For 24 hours, the samples were dried in an oven, at 80°C. To get the final
weight (W2), the samples were weighed again [22]. The following formula was then
used to calculate the moisture content:
2.4.2 Absorption of water
Bioplastic
samples measuring 6 cm2 were measured to determine their initial
weight (W1) and incubated for 24 hours at room temperature in a
beaker filled with 50 ml distilled water. Following a 24-hour period, the
bioplastic was recovered using water filtration, and its initial weight (W1)
was determined by measuring its weight. Subsequently, the bioplastic samples
were oven-dried for 24 hours at 80°C in order to determine their dry weight (W2)
[23]. The following formula was used to
determine the absorption of water:
2.4.3 Absorption of alcohol
Bioplastic samples (6 cm2)
were dried in an oven at 85°C for 24 hours to determine their dry weight (W1).
Following that, the samples were placed in test tubes with lids and left at
room temperature for 24 hours in 3 mL of ethanol. After filtering the water,
the bioplastic residue was dried for 24 hours at 85°C in an oven and weighed to
establish the final weight (W2) [24]. The following formula was used to
calculate the solubility:
2.4.4 Biodegradability
test
Weighing
bioplastic samples measuring 6 cm2 allowed us to determine the
initial weight (W1). The samples were stored for five days at room
temperature, covered with two centimeters of damp garden soil in Styrofoam
cups. Then, after keeping the soil moist for five days, the bioplastic residue
was removed from the soil, washed with water, and dried for 24 hours at 85°C in
an oven. The soil was then weighed once more to determine the final weight (W2)
[25]. The following formula was used to
determine the biodegradability.
3.
Results
and Discussion
Results
indicate that bioplastics derived from renewable resources show promising
potential as alternatives to conventional bioplastics. While mechanical
properties and durability of some bioplastics are comparable to traditional
plastics, challenges remain in scaling production and reducing costs. Further
research is needed to optimize biodegradability and enhance performance across
diverse applications before widespread adoption can
3.1 Moisture-Content
When
plasticizer was applied, the moisture content of bioplastics rose. The
bioplastic samples containing glycerol had the highest moisture content values.
This was addressed in a previous study, which demonstrated that glycerol is
composed of hydroxyl groups that are attracted to water molecules, allowing
them to establish hydrogen bonds and retain water.
Fig. 2: Moisture content
of Bioplastics
3.2 Solubility in water
When
plasticizer was added to bioplastics, the water solubility values increased.
The crystalline structure of starch molecules, which is made up of hydrogen
bonds, can be used to explain why starch granules are insoluble in cold water.
Similar to how water is absorbed and retained with a moisture content, samples
containing glycerol as a plasticizer also showed the highest solubility of
starch-based bioplastics in water. This is because the glycerol-containing
samples are more attracting and have a lower molecular weight, which makes it
easier for water molecules to enter polymer chains. Water solubility was shown
to decrease when fillers were added to potato peel starch bioplastics. This is
because potato peels are primarily starch, and starch granules are insoluble in
water at normal temperature. Fillers, such as potato peel paste, are either
very slightly soluble or insoluble in water.
Fig. 3: Solubility in
water of Bioplastics
3.3
Solubility
in alcohol.
Plasticizer was added to potato peel
starch bioplastics to improve their solubility in alcohol. Plasticizer addition
was observed to increase. The sample using glycerol as a
plasticizer showed the highest levels of water absorption and starch-based
Bioplastics' solubility in water, which corresponded with the trend of moisture
content. The pure glycerol plasticized Bioplastic weighed 1.5068g and 1.1489g
after 24 and 45 hours, respectively. After 48 hours of exposure, it reached
23.75%, the water absorption test plot indicates the differences in water
absorption between the 5% and 95.2% glycerol plasticized Bioplastics.
Glycerol-plasticized starch-based Bioplastics become increasingly hydrophilic
as glycerol concentration increases due to glycerol's strong ability to form
hydrogen bonds with water molecules through its hydroxyl group.
Fig.
4: Soluble in Alcohol of Bioplastics
3.4
Biodegradable
Surface area, molecular
weight, water affinity, and chemical structure are some of the physiochemical
properties of bioplastics produced during the biodegradation process. As
certain their capacity for biodegradation. While adding fillers (5% w/v)
reduced biodegradation ability in the plasticized sample, increasing filler
quantity from 5% w/v to 10% w/v increased biodegradation. Plasticizer was
discovered to accelerate the biodegradation of the bioplastics sample.
Plasticizer's affinity for glycerol enhances biodegradation and water
absorption in samples. The sample containing glycerol had the highest level of
biodegradation.
Fig. 5: Biodegradable
Bioplastics
3.5
Observation table
Table 1: Showing the
table four different% degraded potato peel starch-based bioplastics
S. No.
|
Characterization
Of Bioplastics
|
Initial
Weight(W₁)
|
Final
Weight(W₂)
|
%
|
1.
|
Moisture content
|
1.7723gm,
|
1.6503gm,
|
6.88%
|
2.
|
Absorption of Water
|
1.5116gm,
|
2.7949gm,
|
84.89%
|
3.
|
Absorption of
Alcohol
|
1.5068gm,
|
1.1489gm,
|
23.75%
|
4.
|
Biodegradability
|
1.6632gm,
|
0.9039gm,
|
45.65%
|
5.
|
Solubility in Water
|
1.5116gm,
|
0.7937gm,
|
47.49%
|
Conclusion
This study concludes
that starch-based bioplastics have been effectively manufactured from potatoes.
These products have far higher biodegradable characteristics than traditional
polymers. Bioplastics are derived from sustainable plant resources, providing a
variety of alternatives for plastics production. This review has discussed
bioplastics, including their kind, degradability, standards, advantages, and
downsides. A potato-starch bioplastic with Eichhornia crassipes filler has
been created. The water absorption and biodegradability of the bioplastic have
also been assessed. Adding Eichhornia crassipes filler to potato
starch-based bioplastic increases tensile strength by 4.94%, reduces water
absorption by 84.89%, and increases weight loss in biodegradability by 45.65%
within 5 days. Adding Eichhornia crassipes filler improves tensile
strength by 1.28%, reduces water absorption by 84.89%, and increases weight
loss in biodegradability by 45.65%. Using Eichhornia crassipes fillers
reduced tensile strength and Young Modulus by a small amount. There was no
trial and error in the experiment, resulting in 84.89% and 45.65%,
respectively. Bioplastic samples with low water absorption and significant
weight loss are more likely to disintegrate quickly. The addition of Eichhornia
crassipes as a filler improves the potato starch-based bioplastic,
according to testing and production results. Bioplastics should be used
sparingly and with tailored features. However, it is critical that we assess
the environmental disadvantages of bioplastics against the problems produced by
traditional plastics. Future studies should undertake comprehensive LCAs and
LUC evaluations to prove the eco-friendliness of these novel bioplastics. Such
studies will assist policymakers in determining if the usage of new-generation
bioplastics is good for the environment.