Petroleum-based Counterparts Research Articles

Passerini and thiol-ene reactions: A facile, green, and efficient route to high-performance bio-based plasticizers

The increasing global demand for sustainable alternatives to petroleum-based plasticizers, particularly in poly(vinyl chloride) (PVC) products, has intensified the exploration of bio-based options derived from renewable resources such as plant oils. Traditional bio-based plasticizers, while promising, often suffer from limitations such as low molecular weight, high volatility, and poor compatibility with PVC, thereby restricting their practical applications. To surmount this hurdle, we introduce a novel synthetic route combining the Passerini reaction with the thiol-ene click reaction, aimed at producing high-performance plant oil-based plasticizers (POPs) with enhanced ester content and molecular weight. This method offers significant advantages over traditional methods, including low reaction temperatures (≤40 ​°C), ultrahigh yield (95 ​%) when using ethanol as the solvent, and precise control over ester content. Furthermore, the key findings demonstrate that the designed and synthesized POP (bio-content, 69 ​%) produced using this method exhibits outstanding overall performance, such as excellent migration resistance, good compatibility with PVC, and high thermal stability compared to traditional plasticizers. This facile, green, and efficient method may significantly advance the adoption of bio-based plasticizers, establishing them as a viable alternative to petroleum-based counterparts.

Exploring industrial lignocellulosic waste: Sources, types, and potential as high-value molecules

Lignocellulosic biomass has a promising role in a circular bioeconomy and may be used to produce valuable molecules for green chemistry. Lignocellulosic biomass, such as food waste, agricultural waste, wood, paper or cardboard, corresponded to 15.7% of all waste produced in Europe in 2020, and has a high potential as a secondary raw material for industrial processes. This review first presents industrial lignocellulosic waste sources, in terms of their composition, quantities and types of lignocellulosic residues. Secondly, the possible high added-value chemicals obtained from transformation of lignocellulosic waste are detailed, as well as their potential for applications in the food industry, biomedical, energy or chemistry sectors, including as sources of polyphenols, enzymes, bioplastic precursors or biofuels. In a third part, various available transformation treatments, such as physical treatments with ultrasound or heat, chemical treatments with acids or bases, and biological treatments with enzymes or microorganisms, are presented. The last part discusses the perspectives of the use of lignocellulosic waste and the fact that decreasing the cost of transformation is one of the major issues for improving the use of lignocellulosic biomass in a circular economy and green chemistry approach, since it is currently often more expensive than petroleum-based counterparts.

Synthesis and characterization of biodegradable Kraft lignin-based hydrophilic phenol formaldehyde foams

Phenol formaldehyde foams, extensively utilized in wide range of applications face challenges due to depleting petroleum resources and adverse environmental concerns. This study explores a promising shift to biobased alternatives, specifically investigating the use of Kraft lignin (KL) by replacing about 10 to 50% phenol content to synthesize open-cell hydrophilic phenolic foams. The produced foams undergo comprehensive testing to evaluate wetting properties, porosity, mechanical strength, and biodegradation potential. Remarkably, foams with a high percentage of Kraft lignin exhibit outstanding physical and wetting characteristics. Notably, substituting 50% of phenol with KL gave rise to a foam with a density of 40 kg/m3, open cell porosity of about 100%, water absorption capacity of 2100%, and an average water uptake rate of 0.9 cm3/s. Furthermore, these lignin-substituted foams display enhanced biodegradability compared with their petroleum-based counterparts. The foam with the 40% phenol substitution exhibits the highest weight loss of approximately 68% in 15 days during the biodegradation test. The biodegradation was further confirmed using scanning electron microscopy and FT-IR analysis of the degraded samples.

Eco-Friendly and High-Performance Bio-Polyurethane Adhesives from Vegetable Oils: A Review.

Current petrochemical-based adhesives adversely affect the environment through substantial volatile organic compound (VOC) emissions during production, contributing to air pollution and climate change. In contrast, vegetable oils extracted from bio-resources provide a compelling alternative owing to their renewability, abundance, and compatibility with adhesive formulation chemistry. This review aimed to critically examine and synthesize the existing scholarly literature on environmentally friendly, sustainable, and high-performance polyurethane adhesives (PUAs) developed from vegetable oils. The use of PUAs derived from vegetable oils promises to provide a long-term replacement while simultaneously maintaining or improving adhesive properties. This quality renders these adhesives appropriate for widespread use in various sectors, including construction, automotive manufacturing, packaging, textile, and footwear industries. This review intended to perform a comprehensive assessment and integration of the existing research, thereby identifying the raw materials, strengths, weaknesses, and gaps in knowledge concerning vegetable oil-based PUAs. In doing so, it responded to these gaps and proposes potential avenues for future research. Therefore, this review accomplishes more than merely evaluating the existing research; it fosters the advancement of greener PUA technologies by identifying areas for improvement and innovation towards more sustainable industrial practices by showcasing vegetable oil-based PUAs as viable, high-performance alternatives to their petroleum-based counterparts.

Green lubricants in action: a comprehensive performance evaluation of groundnut oil-based cutting fluids in metal machining processes

As industries worldwide seek environmentally sustainable solutions, the metalworking sector faces a growing need for eco-friendly alternatives to traditional cutting fluids. This abstract introduces the concept of an innovative approach to cutting fluid technology—the use of groundnut oil as a base material for machining fluids. Derived from peanuts, groundnut oil presents a renewable and biodegradable alternative to petroleum-based counterparts, addressing concerns related to resource depletion and environmental impact. A comprehensive performance evaluation of groundnut oil- based cutting fluid has been carried out by series of critical tests such as separation testing, particle size and stability testing, frictional testing, corrosion testing and drilling testing. The results of these tests collectively contribute to a comprehensive understanding of groundnut oil-based cutting fluids, shedding light on their potential as sustainable and high-performance alternatives in metalworking. The zeta potential for the prepared green cutting fluid has been found to be 49.10 mV. The dimensions of the dispersed particles in a fluid of the cutting fluid have been found as 250–260 nm. The environmentally friendly cutting fluid exhibits favourable outcomes in corrosion resistance, frictional performance, and drilling efficacy during testing.

A Review of Current Achievements and Recent Challenges in Bacterial Medium-Chain-Length Polyhydroxyalkanoates: Production and Potential Applications.

Using petroleum-derived plastics has contributed significantly to environmental issues, such as greenhouse gas emissions and the accumulation of plastic waste in ecosystems. Researchers have focused on developing ecofriendly polymers as alternatives to traditional plastics to address these concerns. This review provides a comprehensive overview of medium-chain-length polyhydroxyalkanoates (mcl-PHAs), biodegradable biopolymers produced by microorganisms that show promise in replacing conventional plastics. The review discusses the classification, properties, and potential substrates of less studied mcl-PHAs, highlighting their greater ductility and flexibility compared to poly(3-hydroxybutyrate), a well-known but brittle PHA. The authors summarize existing research to emphasize the potential applications of mcl-PHAs in biomedicine, packaging, biocomposites, water treatment, and energy. Future research should focus on improving production techniques, ensuring economic viability, and addressing challenges associated with industrial implementation. Investigating the biodegradability, stability, mechanical properties, durability, and cost-effectiveness of mcl-PHA-based products compared to petroleum-based counterparts is crucial. The future of mcl-PHAs looks promising, with continued research expected to optimize production techniques, enhance material properties, and expand applications. Interdisciplinary collaborations among microbiologists, engineers, chemists, and materials scientists will drive progress in this field. In conclusion, this review serves as a valuable resource to understand mcl-PHAs as sustainable alternatives to conventional plastics. However, further research is needed to optimize production methods, evaluate long-term ecological impacts, and assess the feasibility and viability in various industries.

Bio-based flame retardant for manufacturing fire safety, strong yet tough versatile epoxy resin

Bio-based flame retardants have attracted growing attention for sustainability and comparable efficiency to petroleum-based counterparts but suffer from compatibility issues with epoxy resins and the trade-off between strength and toughness. Here, a Schiff base-derived phosphorus-based flame retardant (TV-DOPO) was developed from biobased vanillin and tyramine. In the presence of the binary curing agents, nanoscale in-situ constructive phase separation induced by hierarchical thermal curing process and strong hydrogen bonding provide the composite resin with enhanced both stiffness and toughness. The flexural and impact strengths reached 159 MPa and 55.4 kJ m−2, which were increased by 36.5% and 129.6%, respectively, compared with the pristine epoxy, meanwhile excellent flame retardance was well maintained (UL-94 V-0 rating). Remarkably, these conjugated phosphaphenanthrene-containing composite resins demonstrate excellent UV-shielding capacity and optical transmittance. In this work, in-situ construction of a crosslinked network with tunable size of phase separation domains can be simply achieved by modulating the ratio of binary curing agents, to fabricate epoxy resins with all-around enhanced performance.

Non-isothermal curing kinetics of soybean oil-based resins: Effect of initiator and reactive diluent

Soybean oil has been utilized as a raw material to develop biobased polymer to replace petroleum-based counterparts due to its abundance, renewability, and molecular designability. Acrylated epoxidized soybean oil (AESO) is a commercially available product and has been used in coatings, plasticizers, and composites. The curing of AESO resins normally refers to the free-radical polymerization of CC bonds, which is closely related to the types of initiators and reactive diluents (RDs). In this work, the processing parameters and curing kinetic mechanism of AESO resins were investigated based on the extrapolation method, Kissinger, Crane, and Friedman equations, and the influences of initiators and RDs on the curing of the resins were explored. Results indicated that the types of initiators significantly affected the processability and curing kinetics of AESO resins, and the curing temperatures and reaction activation energy of the resins were strongly associated with the decomposition temperature and activation energy of the initiators. The number of CC bonds and molecular structure of RDs considerably influence the curing characteristics of the resins. The addition of RDs endowed the reaction more complexity, and the activation energy significantly depended on the level of CC conversion.

Lipase catalyzed synthesis of bio-based polyamide 5.6: an alternative route

This article presents a novel and sustainable approach to the synthesis of polyamide 5.6 by using cadaverine (pentane-1,5-diamine) as a bio-based monomer and lipase enzyme as a biocatalyst. The aim of the study is to show that it is possible to use renewable resources and enzymes for the synthesis of high molecular weight polyamides with low environmental impact, which can be an alternative to petroleum-based polyamides. The article provides a detailed account of the enzyme catalyzed polymerization process, including the optimization of reaction conditions and the characterization of the resulting polymer. The synthesized polyamide was characterized by various techniques, including Gel Permeation Chromatography (GPC), Fourier Transform Infrared Spectroscopy (FTIR), Nuclear Magnetic Resonance (NMR), Differential Scanning Calorimetry (DSC), and Thermogravimetric Analysis (TGA). The results showed that the physical and thermal properties of the enzymatically synthesized bio-based polyamide are on par with its petroleum-based counterparts, which are widely used in the plastic industry.

Strong and ultrafast stimulus-healable lignin-based composite elastomers with excellent adhesion properties

With the increased environmental issues, advanced high-performance and multifunctional polymeric materials derived from biomass have tremendous attention due to the great potential to replace their traditional petroleum-based counterparts. In this work, a series of lignin graft copolymers, lignin-graft-poly(n-butyl acrylate-co-acrylic acid) (Lig-g-P(BA-co-AA)), were rationally prepared via reversible addition-fragmentation chain transfer (RAFT) polymerization. These lignin-based copolymers demonstrate good thermal stability and tunable glass transition temperature (Tg) values. The mechanical performance, including tensile strength, extensibility, Young's modulus, and toughness can be facilely adjusted by the BA/AA feed ratio and lignin content during polymerization. Owing to the extraordinary photothermal conversion ability of lignin, the Lig-B550 copolymer, containing 11.8 wt% lignin content, shows excellent stimulus-healing behavior within 1 min with a 97.1 % healing efficiency under near-infrared (NIR) laser irradiation. Moreover, the Lig-g-P(BA-co-AA) copolymers exhibit remarkable adhesion property, broadening their potential applications in the adhesive area. This grafting strategy is versatile and efficient, conferring the resultant lignin-based composite elastomers with dramatically enhanced mechanical properties and unprecedented photothermal behavior, which can inspire the further development of strong lignin-based sustainable elastomers.

A Comparative Life Cycle Assessment of a New Cellulose-Based Composite and Glass Fibre Reinforced Composites

The use of renewable lightweight materials and the adoption of cleaner production are two effective approaches to reduce resource consumption, which contributes to meeting the industry’s environmental impact targets. In a previous study we found, that a miscanthus fibre reinforced cellulose acetate (CA-Miscanthus, 25 wt.%) can be a bio-based alternative to glass fibre reinforced polypropylene (PP-GF, 20 wt.%), as both materials exhibit similar mechanical properties. However, only limited information on the environmental benefits of using bio-based composites instead of their petroleum-based counterparts are available. In this study, we compare the environmental impact of ready to use compound of both materials in the cradle to gate system boundaries, including fibre cultivation, fractionation and refining, fibre pretreatment, and compounding. The functional unit is chosen based on the equivalent function of both materials. The environmental impact is determined using the Product Environmental Footprint (PEF) methodology. The results reveal that the CA-Mis composite has a higher environmental impact than the PP-GF composite in all categories observed, despite its biomass origin. As the primary reason for the high impact, the acetic anhydride use during CA production is identified. The study indicates that, though the bio-composite CA-Mis has mechanical properties comparable to PP-GF composites, it is not as eco-friendly as we initially assumed it to be.

Life Cycle Assessment of Polyol Production from Lignin via Organosolv and Liquefaction Treatments

This study aimed to conduct a comprehensive Life Cycle Assessment (LCA) of lignin-based polyol production through organosolv fractionation of cardoon stalks and subsequent lignin liquefaction. The LCA employed a cradle-to-gate approach, encompassing cardoon cultivation and all processing steps leading to polyol production. The research involved laboratory-scale optimization of the organosolv and liquefaction processes, followed by industrial-scale implementation. The analysis revealed that all stages of the production chain, including crop cultivation, organosolv, and liquefaction, significantly influenced overall environmental impacts. Specific materials and processes played pivotal roles, such as harvesting machinery and fertilizers in crop production, γ-Valerolactone (GVL) as the primary contributor (72–100%) to environmental impacts in the organosolv phase, and materials like polyethylene glycol 400 (PEG 400) and glycerin in the liquefaction phase, accounting for the majority (96–100%) of environmental impacts in this stage. When considering endpoint damage categories, it became evident that this production chain had a notable impact on human health, primarily due to emissions in air, water, and soil from agricultural processes. Lignin-based polyols demonstrated a moderate improvement compared to their petroleum-based counterparts, with an approximate reduction of 3–16% in environmental impact.

A Review of Strategies to Enhance the Water Resistance of Green Wood Adhesives Produced from Sustainable Protein Sources

The health risks associated with formaldehyde have propelled relevant stakeholders to push for the production of non-toxic wood adhesives. Several countries including the USA, Japan, and Germany have implemented policies mandating manufacturers to reduce the emissions of formaldehyde to lower levels. Protein adhesives stand out due to their sustainability, renewable sources, and biodegradability. However, they are limited by poor wet strength and water resistance, which affect their wide acceptability in the marketplace. Researchers have developed multiple strategies to mitigate these issues to advance protein adhesives so they may compete more favorably with their petroleum-based counterparts. This review paper explores these strategies including cross-linking, modified fillers, and the removal of hydrophilic content while providing insights into the methodological approaches utilized in recent literature with a comparison of the resultant protein adhesives.

Sustainable composites for lightweight and flame retardant parts for electric vehicles to boost climate benefits: A perspective

The global automotive sector is moving towards zero-emission transportation, which has led to the rapid growth of the electric vehicles (EVs) market, projected to reach USD 1318 billion in 2028. The two key challenges that EVs are facing are their heavy curb weight (∼ 1000 lbs. heavier than their petroleum-based counterparts) due to their battery packs, and their fire threat, caused by thermal runaway of batteries. Further, growing concerns about the sustainability of EV technology has created pressure on automotive manufacturers to drive innovation of new materials with less environmental impacts. These challenges can be addressed by developing high-performance sustainable polymer composites for lightweight components for EVs with enhanced flame retardancy without compromising their performance. Manufacturing and integration of automotive parts from sustainable composites target and support the “Circular Economy” of EVs. Lightweighting EV components will increase travel ranges, minimize crash impacts, lower braking distances, and reduce the wear and tear of the tires. In sustainable and renewable composite manufacturing, “engineering plastics” including recycled carbon fibers and sustainable resource derived advanced biocarbon will have an edge over “traditional plastics”. In addition, the inclusion of sustainable flame-retardants in the EV components will increase the flashover duration, resulting in better thermal management and delay in thermal runaway. Thus, in this perspective, the recent acceleration in automotive weight reduction strategies is discussed through the utilization of high-performance lightweight and sustainable composites with superior flame retardancy to address the criteria for the circularity of materials towards climate benefits.

A formaldehyde-free bio-composite sheet used as adhesive with excellent water-wet bonding performance

Formaldehyde-free liquid adhesives derived from biomass are attractive candidates to petroleum-based counterparts. However, developing solid bio-adhesive with excellent wet strength and bonding performances remains a lasting challenge. Here, we report a bio-composite sheet consisting of soybean flour, paper, and cross-linking agent (Polyamidoamine-epichlorohydrin, PAE), and its wet strength and bonding performances was evaluated by paper straw and plywood application. The covalent crosslinking by the reaction of soybean protein and PAE plays a major role in the enhancement of various properties of the cured bio-composite sheet. The tensile stress of cured bio-composite sheet was only lower than the prototype sample 14.5% after 100 ℃ water soaking treatment for 2 h. Paper straw rolled from the bio-composite sheet displayed boiling water stable at the same condition, while had better flexural strength and natural degradability than the plastic straw. Bonding strength of plywood boned with bio-composite sheet reached 1.38 MPa, which was exceeded 97.1% than the requirement of the Chinese National Standard GB/T 9846–2015 for interior plywood. Given the simple and general strategy, the products based on bio-composite sheet can potentially be a new approach on the use of biomass adhesives, which also be a suitable solution to solve the environmental challenges (e.g., formaldehyde) in the field of biomass-based composites.

Synthesis and characterization of chitosan/cellulose blend reinforced with copper oxide nanoparticles as moisture barrier film

Bio-based plastics emerged as eco-friendly and resource-efficient substitutes for petroleum-based counterparts. Despite the continuous efforts to develop these alternatives, their inferior performance, most notably mechanical and moisture barrier aspects, limits their application. Material hybridization, like polymer blending and nanocomposite technology, are among the methods employed to improve the properties of bioplastics. This present work focuses on synthesizing bioplastic films with 30/70, 50/50, and 70/30 chitosan to cellulose (CH/CE) percent weight ratios. FTIR analysis of the blend films revealed interaction between NH2 and OH, confirming the compatibility between chitosan and cellulose. Analysis of variance showed increasing cellulose content significantly (p < 0.05) enhanced the resistance to swelling. The 30/70-CH/CE film exhibited the least swelling, which is 65.5% lower than the pure chitosan film. Moreover, copper oxide nanoparticles (CuO NPs) were prepared as reinforcement due to its hydrophobicity. Structural and morphological analyses of hydrothermally synthesized CuO nanoparticles confirmed monoclinic and urchin-like structure. Varying amounts of CuO NPs, i.e., 1%, 3%, and 5% w/v were added to the 30/70-CH/CE films to further enhance the moisture barrier properties. The best barrier performance was attained at 5% w/v, indicated by the smallest % swelling (93.25%) and largest contact angle measurement (89.32°). This could be related to the morphological change from fibrous to smoother film surface with increasing amount of CuO NPs. Results suggest the potential of the chitosan/cellulose polymer blend and the copper oxide nanoparticle-reinforced films for moisture barrier applications.

Shearing friction behaviour of synthetic polymers compared to a functionalized polysaccharide on biomimetic surfaces: models for the prediction of performance of eco-designed formulations.

The substitution of natural, bio-based and/or biodegradable polymers for those of petrochemical origin in consumer formulations has become an active area of research and development as the sourcing and destiny of material components becomes a more critical factor in product design. These polymers often differ from their petroleum-based counterparts in topology, raw material composition and solution behaviour. Effective and efficient reformulation that maintains comparable cosmetic performance to existing products requires a deep understanding of the differences in frictional behaviour between polymers as a function of their molecular structure. In this work, we simulate the tribological behaviour of three topologically distinct polymers in solution with surfactants and in contact with hair-biomimetic patterned surfaces. We compare a generic functionalized polysaccharide to two performant polymers used in shampoo formulations: a strongly positively charged polyelectrolyte and a zwitterionic copolymer. Topological differences are expected to affect rheological properties, as well as their direct interaction with structured biological substrates. Using a refined Martini-style coarse-grained model we describe the polymer-dependent differences in aggregation behaviour as well as selective interactions with a biomimetic model hair surface. Additionally, we introduce a formalism to characterize the response of the solution to shear as an initial study on lubrication properties, which define the sensorial performance of these systems in cosmetics (i.e., manageability, touch, etc.). The tools and techniques presented in this work illustrate the strength of molecular simulation in eco-design of formulation as a complement to experiment. These efforts help advance our understanding of how we can relate complex atomic-scale solution behaviour to relevant macroscopic properties. We expect these techniques to play an increasingly important role in advancing strategies for green polymer formulation design by providing an understanding for how new polymers could reach and even exceed the level of performance of existing polymers.

Bio-based semi-interpenetrating networks with nanoscale morphology and interconnected microporous structure

Creating new bio-based sustainable polymeric materials with similar or better performance than the petroleum-based counterparts has recently received considerable attention. It will have a significant positive impact on the environment and the sustainable polymer industry. This review article shows a relatively new method based on simultaneous in-situ polymerization and compatibilization of bio-based plant oil and biodegradable thermoplastic polymer to prepare semi-interpenetrating polymer networks (SINs) with unusual nano-scale morphology and interconnected porous structure will be summarized. The SINs were synthesized via cationic polymerization of tung oil in a homogenous solution of poly(ε-caprolactone) as a biodegradable, semi-crystalline, and biocompatible thermoplastic polymer. The degrees of miscibility, nanostructure morphology, and crystallinity was found to be composition-dependent. This relatively new blending method created a two-phase nanoscale morphology as small as 100 nm for blends with PCL contents of 20 and 30 wt.%. For higher PCL contents (e.g., 50 wt.% PCL blend), a co-continuous, interconnected microscale two-phase morphology was detected. The microporous structure of the SINs was also changed as a function of composition. For example, the interconnectivity and pore size was considerably decreased with increasing PCL content. Furthermore, a considerable decrease in the crystallization kinetics of PCL was observed as the PCL content is higher than or equal to 30 wt.%. While on the other hand, the crystallization kinetics accelerated significantly for 50 wt.%. This novel, low-cost strategy for preparing bio-based SINs with nanoscale morphology and interconnected three-dimensional cluster structures and desired properties should be widely used for creating new polymer systems.

Structure-property insights of semi-aromatic polyamides based on renewable furanic monomer and aliphatic diamines

A series of semi-aromatic polyamides based on a renewable monomer, 2,5-furandicarboxylic acid (FDCA) has been reported. The dimethyl ester derivative of FDCA (DMFDC) was subjected to polymerization with aliphatic diamines differing in carbon chain length, through an environmentally benign melt polycondensation technique using titanium(IV) isopropoxide (TIPT) catalyst at low concentrations (400 ppm). The newly synthesized furan-based polyamides (FPAs) showed molecular weights in the range of Mn = 8–11 kg/mol and Mw = 29–32 kg/mol and high glass transition temperatures (Tg range 97–140 °C). The structure and properties of these FPAs were investigated using various analytical techniques. DSC analysis showed absence of crystallization and melting behaviour, indicating predominantly an amorphous character of these FPAs, which was further confirmed by DMA analysis. However, Poly(butylene furanamide) (PA4F) showed presence of crystalline regions exhibited in the form of several peaks on the WAXD pattern. These peaks were attributed to the isothermal crystallization caused by the annealing effects during synthesis. The FPAs also showed comparable thermal stabilities to their petroleum-based counterparts as measured by the TGA and found to be thermally stable up to 400 °C. Poly(decamethylene furanamide) (PA10F) displayed the highest thermal stability (Td-max = 446 °C). MALDI-ToF MS revealed various end-groups in addition to the expected amino and ester end-groups arising from the side reactions, such as, pyrrolidine (PA4F), N-methylation, decarboxylation and triamine formation. Presence of these end-groups was ascribed to the higher temperature employed for the polycondensation step.

Developing highly transparent yet ultraviolet blocking fully biocomposite films based on chitin and lignin using ethanol/water as processing solvents

Developing fully biobased products with functionality in a green fashion is highly desirable to meet the increasing demand for environmental sustainability and mitigate “white pollution” by petroleum-based counterparts. Here, chitin from shrimp shells was propionylated to obtain chitin propionate (CP) with significantly improved solubility in organic solvents, organosolv lignin (OSL) was extracted from the forest harvest residuals. The fully biobased composite consisting of CP as a matrix and OSL as a UV-blocker were successfully prepared using acidic ethanol/water as a green processing solvent. The results indicated that the 5% OSL addition enabled the CP film to block approximately 98% UV light while allowing 71% visible light transmittance; tensile and thermal properties were also retained. Nearly 100% UV light was blocked with 20% OSL addition, but visible light transmittance was moderately sacrificed. This study provides an alternative solution to produce novel fully biobased films with high transparency yet excellent UV protection for potential packaging applications.