Bioplastic: an eco‐friendly alternative to non‐biodegradable plastic

Polymer International, Journal Year: 2023, Volume and Issue: 72(11), P. 984 - 996

Published: June 15, 2023

Abstract The accumulation of non‐biodegradable plastic waste in land and aquatic environments is expanding every day. According to data collected from various scientific reports, about 100–250 megatonnes arrives the oceans annually. Central Control Board India (2019–2020), produces 3.5 million metric tonnes annually, while only 5–10% produced recycled. non‐recycled dumped into environment either goes landfills or directly sea, which disrupts marine life ocean. We are highly dependent on at household industrial scales. Removal lowering use hazardous plastics main challenges. Researchers industrialists have come up with many ideas lower generation found that reusability easier than degradability, bioplastics ultimate solution tackle problem. Hence, developing eco‐friendly alternative without compromising physicochemical mechanical properties need hour. An conventional petrochemical bioplastics, environmentally safe, reduce our dependency fossil reserves. Therefore, this review focuses as an efficient plastics. Among renewable sustainable feedstocks available, vegetable oils most suitable resource for bioplastic production because their renewability economical nature. study concluded polyurethane‐based polymers inherently more other © 2023 Society Industrial Chemistry.

Language: Английский

---

Production of polyols and polyurethane from biomass: a review

Environmental Chemistry Letters, Journal Year: 2023, Volume and Issue: 21(4), P. 2199 - 2223

Published: March 22, 2023

Language: Английский

---

Efficient and environmentally friendly techniques for extracting lignin from lignocellulose biomass and subsequent uses: A review

Cleaner Materials, Journal Year: 2024, Volume and Issue: 13, P. 100253 - 100253

Published: June 13, 2024

The development of sustainable and effective methods for extracting lignin is crucial achieving the advantages promoting shift towards a more circular bioeconomy. This study addresses use environmentally friendly processes, including organosolv technique, supercritical fluid (SCF), non-thermal plasma (NTP), ionic liquids (ILs), deep eutectic solvents (DES), microwave assisted extraction (MAE) techniques extraction. Organosolv treatment offers high selectivity purity make this process economically feasible. Using water, carbon dioxide, or ethanol to extract without harmful successful customizable. NTP technologies break down lignin, simplifying processing increasing its value. Whereas ILs may boost synthesis change properties via solvent design. DES-based can efficiently specifically lignin. rapid MAE method employs radiation reduce times yields These feature selectivity, little environmental impact, capacity target fractions. describes fundamentals, benefits, drawbacks each process, focusing on their ability large scale future usage. Additionally, review explores most recent advancements in application sector, as well challenges potential valorizing streams derived from extraction, thereby fostering solutions. research concludes that overcome challenges, need address concerns, cost, emissions, efficient use.

Language: Английский

---

Recent advances in high-efficiency formation of gas hydrates within fixed beds: Classification, mechanism, applications and challenges

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159611 - 159611

Published: Jan. 1, 2025

Language: Английский

---

Catalytic epoxidation of unsaturated fatty acids in palm stearin via in situ peracetic acids mechanism

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 8, 2025

Epoxidized vegetable oils present a viable substitute for polymers derived from petroleum. This research focuses on the impact of process parameter epoxidation palm stearin when zeolite ZSM-5 is used as catalyst. study synthesized peracetic acid oxidizing agent by combining hydrogen peroxide and acetic acid, adjusting molar ratios relative to stearin. The optimal conversion oxirane (RCO) percentage reached 43.06% at 70 °C, 200 rpm stirring speed, 0.8 g ratio was 1:1, 0.5:1. Both its epoxide derivative have been studied using Fourier-transform infrared spectroscopy, showing appearance an ring wavenumber 1240 cm⁻¹. Kinetic modelling demonstrates that simulation experiment show reasonable discrepancy, considering several assumptions made. After 100 iterations, reaction rate constant obtained follows: $$\:{k}_{11}$$ =0.01 mol⋅L−1⋅min−1, $$\:{k}_{12}$$ = 1.85 $$\:{k}_{2}$$ 29.90 mol⋅L− 1⋅min− 1, $$\:{k}_{3}$$ 0.04 mol⋅L−1⋅min−1.

Language: Английский

---

Recent Advances in Polyurethane Coatings and Adhesives Derived from Vegetable Oil-Based Polyols

Journal of Polymers and the Environment, Journal Year: 2023, Volume and Issue: 31(11), P. 4583 - 4605

Published: May 18, 2023

Language: Английский

---

Flexible Polyurethane Foams Modified with Novel Coconut Monoglycerides-Based Polyester Polyols

ACS Omega, Journal Year: 2024, Volume and Issue: 9(4), P. 4497 - 4512

Published: Jan. 15, 2024

Coconut oil, a low-molecular-weight vegetable is virtually unutilized as polyol material for flexible polyurethane foam (FPUF) production due to the high-molecular-weight requirement of FPUFs. The saturated chemistry coconut oil also limits its compatibility with widely used polyol-forming processes, which mostly rely on unsaturation functionalization. Existing studies have only exploited this resource in producing polyols rigid synthesis. In present work, polyester were synthesized from monoglycerides (CMG), coproduct fatty acid via polycondensation at different mass ratios CMG 1:5 glycerol:phthalic anhydride. Characterization CMG-based (CMGPOL) products showed number-average molecular weights between 1997 and 4275 g/mol, OH numbers 77 142 mg KOH/g, average functionality 4.8 5.8, 4.49 23.56 viscosities 1.27 89.57 Pa·s. synthesize CMGPOL-modified PU foams (CPFs) 20 wt % loading. modification formulation increased monodentate bidentate urea groups, shown using Fourier transform infrared (FTIR) spectroscopy, that promoted microphase separation matrix, confirmed atomic force microscopy (AFM) differential scanning calorimetry (DSC). implications structural change morphology open cell content investigated electron microscope (SEM) gas pycnometer. density CPFs decreased, while significant improvement their tensile compressive properties was observed. Also, exhibited resiliency correlation separation. These findings offer new sustainable raw can be modify petroleum-based produce varying tailored meet specific requirements.

Language: Английский

---

A novel naturally superoleophilic coconut oil-based foam with inherent hydrophobic properties for oil and grease sorption

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: June 20, 2024

Abstract Absorption methods using polyurethane foams (PUFs) have recently gained popularity in treating oil spills. However, conventional petroleum-based PUFs lack selectivity and are commonly surface-modified complicated processes that require toxic harmful solvents to enhance their hydrophobicity sorption capacities. In this paper, a novel naturally superoleophilic foam with inherent hydrophobic properties has been developed through the one-shot foaming method integration of coconut oil-based polyol. This bio-based polyol was explicitly handpicked as it is chiefly saturated, highly abundant, inexpensive. The characterized by an capacity range 14.89–24.65 g −1 for different types oil, equivalent 578–871 times its weight. Its behavior expressed water contact angle ~ 139°. also showcased excellent chemical stability high recyclability without significant loss absorption after 20 cycles. incorporation shown improve morphological, mechanical, thermal foam. It can be inferred from these findings material holds great potential revolutionizing sorbents, pioneering more sustainable eco-friendly functional produced via facile method.

Language: Английский

---

Potential Use of Castor Oil-Based Polyurethane Matrix Composite with Miriti Fiber Filling as Thermal Insulation Applied to Metal Tiles

Polymers, Journal Year: 2025, Volume and Issue: 17(7), P. 892 - 892

Published: March 26, 2025

The Amazon biome's climate, with annual temperatures above 30 °C and humidity over 90%, poses challenges for building thermally comfortable structures without expensive cooling systems. This study developed a castor oil-based polyurethane (PU) composite miriti fiber (Mauritia flexuosa) as roof thermal blanket, comparing its performance to cement, ceramic, metal tiles. Measurements were conducted 136 days at the Federal Institute of Education, Science Technology Pará, Campus Belém. From August October 2022, cement tile (CT) showed average reductions 5.9475 °C, 6.13388 6.37368 while FCT coating had more modest 3.6634 3.63291 3.60598 °C. In November December 2023, PU/miriti reached highest reductions, 18.64058 17.88021 Meanwhile, recorded lower values 1.74124 1.74721 Observations show allowed heat transfer, whereas combined provided better than meeting standards approval. findings highlight composite's viability roofing in hot, humid climates where maintaining indoor is essential. By reducing reliance on mechanical cooling, this technology can foster sustainable, cost-effective practices region.

Language: Английский

---

A novel reaction mechanism for the synthesis of coconut oil-derived biopolyol for rigid poly(urethane-urea) hybrid foam application

RSC Advances, Journal Year: 2023, Volume and Issue: 13(3), P. 1985 - 1994

Published: Jan. 1, 2023

Coconut oil (CO) has become one of the most important renewable raw materials for polyol synthesis due to its abundance and low price. However, saturated chemical structure CO limits capability functionalization. In this study, a novel reaction mechanism via sequential glycerolysis amidation triglycerides produced an amine-based (p-CDEA). The synthesized biopolyol relatively higher hydroxyl value 361 mg KOH per g relative previously reported CO-based polyols with values ranging from 270-333 g. This primary hydroxyl-rich p-CDEA was used directly as sole B-side component in polyurethane-forming reaction, without further purification. Results showed that high-performance poly(urethane-urea) (PUA) hybrid foam successfully produced. It compressive strength 226 kPa thermal conductivity 23.2 mW (m-1 K-1), classified type 1 rigid structural sandwich panel core 2 insulation applications according ASTM standards. Fourier-transform infrared (FTIR) spectroscopy performed characterize features foams. Scanning electron microscopy (SEM) analysis also evaluate morphological structures Differential scanning calorimetry (DSC) thermogravimetric (TGA) were conducted investigate foam's characteristics. Thus far, work is first report effective highly functional CO-derived no petroleum-based replacement may serve material PUA production. foams are potential materials. study provided compelling case enhanced sustainability against polyurethane.

Language: Английский

---