Mechanical Pressing Research Articles

Mechanical and Solvent Extraction of Moringa Oleifera Seeds for Vegetable Oil

Moringa oleifera is a plant that is predicted to be a potential source of vegetable oil. Moringa seeds contain 35-40% oil which is used in the pharmaceutical, cosmetic, automotive and fuel industries. Moringa oil contains oleic, palmitic, and behenic acid which is good for health. Obtaining oil from Moringa seeds in this study used the mechanical pressing method and continued with extraction using a solvent. Mechanical extraction was carried out by pressing Moringa seeds with a moisture content of 8 and 16% w/w. The best result was obtained with a moisture content of 8% with the yield of oil produced from 20 to 31% w/w. The pressing temperature also varied at 80, 100, and 120°C and the best result was given by the temperature of 100°C with the yield of oil produced 27.3-28.8% w/w at 8% moisture content of seeds and 20.9-23.6% w/w at 16% moisture content of seeds. The pressed cake from the mechanical pressing was extracted by maceration method using n-hexane as the solvent. The ratio of the amount of solvent to the amount of pressed cake (mL/gram) was 6/1, 8/1, and 10/1. The best ratio given by 8/1 with the yield oil produced from 8.44-22.82% w/w. Moringa oil was characterized using the standard method. The oil density obtained 0.912-0.919 g/cm3, saponification value 195-202 mgKOH/g oil, acid value 1.62-2.77 mgKOH/g oil, and peroxide value 1.85-3.70 meqO2/kg.

A Comprehensive Review of Plant-Based Cosmetic Oils (Virgin Coconut Oil, Olive Oil, Argan Oil, and Jojoba Oil): Chemical and Biological Properties and Their Cosmeceutical Applications.

Plant-based oils, such as coconut, olive, argan, and jojoba, are abundant in natural emollients and vital fatty acids that hydrate and moisturize the skin. They shield the surface, stop moisture loss, and maintain suppleness of, the skin. They are rich in vitamins, nutrients, and antioxidants that nourish the skin. Virgin coconut oil (VCO) is used as a functional food due to its tremendous health benefits, and olive oil is well-known for its cosmetic and culinary applications. Argan oil contains many antioxidants, vital fatty acids, and vitamin E, while jojoba oil is an excellent moisturizer and conditioner. Plant-based oils can be extracted using various techniques including conventional and chemical extraction methods, and each will affect the yield and quality. Traditional methods like mechanical pressing are less efficient, whereas extraction methods such as pressurized liquid and supercritical fluid extraction may give higher yields and better quality. The chemical composition of olive oil primarily consists of saturated fatty acids (SFAs), polyunsaturated fatty acids (PUFAs), and monounsaturated fatty acids (MUFAs). Argan oil is rich in tocopherols, containing between 60 and 90 mg per 100 g, with only 19 g/100 g of argan oil's fatty acids saturated. Jojoba oil is liquid wax comprising over 98% triglyceride esters, pure waxes, vitamins, and sterols. This review focuses on the chemical and biological properties, production processes, and applications of natural cosmetic oils (virgin coconut oil, olive oil, argan oil, and jojoba oil), emphasizing their usage in skin care and cosmeceutical products.

Efficient Solution Blow Spinning of PAN-CNTs Nanofiber-Based Pressure Sensors with Sandwich Structures.

High-performance sensors play a crucial role in smart wearable technology and human-machine interaction. However, traditional metal- and silicon-based sensors face drawbacks, including limited flexibility, high cost, degradation issues, and insufficient sensitivity. Conductive composite fibers were produced using the spinning solution of PAN and PVB mixed with CNTs and spun at a flow rate of 20 mL·h-1. PAN-CNTs fiber felt formed a sandwich structure by impregnating CNTs aqueous solution, mechanical pressing, and coating graphene. A cost-effective PAN-CNTs nanofiber-based pressure sensor (PCPS) was developed, demonstrating excellent flexibility, conductivity, sensitivity, mechanical properties, and biocompatibility. Nanofiber-based pressure sensors exhibited high sensitivity, with an approximately 75% relative resistance change under a 1 N pressure load. They can withstand 360° bending and have a rapid response time of about 160 ms. PCPS holds significant potential for flexible electronics, smart wearables, and micropressure detection.

Characterization of Seven Species of Camellia Oil: Oil Content, Volatile Compounds, and Oxidative Stability.

In this study, we conducted tests on the seeds from four Taiwanese native Camellia species (C. japonica, C. furfuracea, C. laufoshanensis, and C. formosensis) and three commercialized species (C. oleifera, C. brevistyla, and C. sinensis) for comparison. We examined various aspects of these species, such as seed oil content, suitability for mechanical pressing, volatile components (edible flavor), and oil stability (suitability for cooking), to assess the feasibility of using these four native Taiwanese Camellia seeds as sources of edible oil. The results from solvent extraction tests and mechanical pressing experiments confirm that the seeds from C. furfuracea, C. japonica, and C. laufoshanensis have high oil contents, and their oils are suitable for extraction via the popular mechanical pressing method, with oil yields comparable to or higher than those of the commercialized Camellia species. The volatile components of the oils were collected using MonoTrap adsorbents and analyzed with a thermal desorption system coupled with gas chromatography-mass spectrometry (ATD-GC/MS), primarily consisting of alcohols, ketones, and aldehydes. The results of oxidative stability tests reveal that the seed oils from C. japonica, C. furfuracea, and C. laufoshanensis are higher than or equally stable to those from the commercialized Camellia species. After six months of storage, the stability of these three Camellia seed oils remained relatively high, demonstrating that the seed oils from C. japonica, C. furfuracea, and C. laufoshanensis can withstand high temperatures and can be easily preserved for future applications.

Additive manufacturing of wood composite parts by individual layer fabrication - influence of process parameters on product properties

Individual Layer Fabrication (ILF) is a novel additive manufacturing process that was developed to create objects with high wood content and high mechanical strength. Here, thin and individually contoured wood composite panels are created via Binder Jetting and subsequent mechanical pressing. Like in Sheet Lamination, these panels are then laminated onto each other to create a three-dimensional object. With wood contents (more than 85 mass percent) and mechanical properties (more than 30 MPa flexural strength) on par with other engineered wood products like particle boards and plywood, the produced objects are well suited for the construction and furniture industry. To gain a deeper understanding of the process, the influence of processing parameters on the geometric and mechanical properties of the finished objects were investigated. As process parameters the amounts of adhesive and the pressing forces for both panel production and lamination were selected. It was discovered that the interaction between the amount of adhesive and the pressure used to produce the panels is highly relevant for the geometric properties. The three core mechanisms that are responsible for the mechanical properties of produced parts were identified and can be ranked in the following order: 1) the amount of adhesive in the panels binding the particles, 2) the density of the panels, 3) the amount of adhesive for laminating the panels.

Research on seeds compression‐structural damage and castor oil extraction mechanism with in situ observation

AbstractCastor oil has attracted large attention for wide applications, including lubrication oil and bioenergy resources. Castor seeds mechanical pressing is widely used for oil extraction. To better research castor seeds mechanical‐structural damage behavior and oil extraction mechanism during extrusion, a self‐developed mechanical pressing test setup combined with in situ observation is built for oil output behavior. Influencing factors of working pressure, speed, temperature and creep time on oil outflow were investigated. The results indicate that seeds squeezing extraction can be divided into three stages, preloading, oil discharging, compressing consolidation stage, matching with pressing cake structural evolution. As working pressure increases, oil yield shows an upper parabola relation with pressure. When pressure exceeding 25 MPa, castor oil yield increasing tends to stabilize, reaching 38%. Speed effect showed down parabola relation on oil yield, opposite to stress factor. Creep time promoted oil output with upper parabola within 720 s. When temperature below 120°C, a linear increasing relation on oil yield presents. Oil yield decreases when above 120°C. This research provides in‐depth theoretical guidance for industrial castor oil extraction.Practical ApplicationsCastor seeds are rich in oil content. Extracted castor oil has been widely used for industrial applications such as biodiesel, lubricants, medicine. Mechanical extraction working parameters optimization can improve oil yield of castor seeds. The research provides a basic working optimization for castor seeds oil extraction. Castor oil has unique properties and has been proved to be a high promising renewable and independent energy sources. Compared with solvent oil extraction, mechanical oil pressing extraction method has higher oil quality and safety. The mechanical extracted oil is pure without organic solvent. In the research, castor seeds compression‐structural damage property and oil extraction mechanism were studied. Besides, the influence factors including compression pressure, speed, temperature and creep time are analyzed, working optimization for castor seeds oil extraction. The research provides important reference value for the mechanical pressing process and mechanical design of castor seeds in the practical applications.

Mechanical Compression‐Enabled Carbon‐Based Perovskite Solar Cells with Enhanced Efficiency and Stability

Carbon electrode‐based perovskite solar cells (C‐PSCs) without hole transport layer (HTL) have been emerging as a promising low‐cost photovoltaic technology with excellent stability for commercialization. However, the loose physical contact between the carbon electrode and perovskite layer, as well as the relatively poor conductivity of the carbon film, contributes mainly to the large gap in the power conversion efficiency (PCE) between C‐PSCs and the metal (Ag, Au, etc.,) electrode‐based counterparts. To this end, a simple but effective mechanical compression strategy for efficient C‐PSCs is developed. The mechanical compression densifies the porous carbon electrode for high film conductivity and also provides intimate contact between carbon and perovskite layers for fast charge extraction. Consequently, the resulting HTL‐free C‐PSCs using MAPbI3 (MA = methylammonium) absorber yield a PCE of 15.29%, corresponding to a 27.6% improvement compared to the counterpart without mechanical pressing treatment. Moreover, the compacted carbon film also serves as an enhanced barrier against the intrusion of water and oxygen, and the unencapsulated device retains 88.9% of its initial PCE after 1000 h of aging in ambient conditions with 35 ± 2% humidity. This work paves a simple and effective way toward efficient and stable C‐PSC.

Study on synergistic friction between surface micro-texture and hot-pressing filling coal-to-oil soot solid lubricant

To study the combination of triangle micro-texture (TM) and coal-to-oil soot (CS) solid lubricants to improve the tribological properties of steel balls and disc surface, three filling processes (hot pressing, mechanical pressing, and alcohol coating) were used to prepare CS composite lubricating film on TM surface (TM-CS). The tribological behavior of CS was examined across various experimental parameters using the WTM-2E controlled atmosphere micro-friction and wear tester. The structure and morphology of CS were scrutinized with high-resolution transmission electron microscopy. The tribological mechanisms were involved by X-ray photoelectron spectroscopy and scanning electron microscopy. The results reveal that the hot press filling is the most effective method, which can achieve a 97 % filling rate. The optimal tribological performance is observed at a speed of 900 rpm and a load of 2.5 N. Under this condition, the TM-CS surface reduces by 75 % in the average friction coefficient (AFC) and 88 % in the average wear scar diameter (AWSD) compared to the TM surface. The analysis of the friction mechanisms indicates a substantial synergistic effect between the TM surface and the CS solid lubricant. This synergy is significantly potentiated by the electrostatic adsorption phenomenon and the impact of airflow at high rotational speeds, which play a pivotal supportive role in enhancing tribological performance.

Enhancing mechanical properties and tribological performance through boron carbide hybridization in Novolac matrix graphite composites under dry sliding condition

This study extensively investigates the effects of 10 wt% graphite reinforcement and varying B4C content (1 wt%, 2 wt%, 4 wt%) on the properties of Novolac matrix polymer composites prepared by mechanical milling-assisted hot pressing. The microstructures, wear surfaces, wear debris, and fracture surfaces of the produced polymer composites were examined using SEM and EDS. The density measurements were conducted according to the Archimed’s principle. Their tribological behavior was evaluated with a reciprocating ball-on-flat sliding wear test at 50 N, 75 N, and 100 N loads. After the wear tests, surface topography was analyzed in 3D with an optical profilometer. The results indicated that composites with 2 wt% B4C had the lowest specific wear rate and the highest wear resistance.

Comprehensive analysis of the phytochemical composition and antitumoral activity of an olive pomace extract obtained by mechanical pressing

Cancer is a worldwide epidemic and a leading cause of death. There is a need to find natural solutions for therapy to prevent that outcome. Olive pomace is a known source of bioactive compounds. This work aimed to obtain an olive pomace extract, using an innovative green method, and to assess its chemical composition and the effect of its application in different cancer cell lines. The extract was composed of sugars (28%), minerals (11%), lipids (8%), mostly oleic acid (72%), protein (1%), phenolics (3 g gallic acid equivalents/100 g), hydroxytyrosol (215 mg/100 g), flavonoids (2 g catechin equivalents/100 g), and α-tocopherol (2 mg/100 g). Moreover, 68 phenolics were tentatively identified by UHPLC-ESI-QTOF-MS. The extract significantly reduced the proliferation of the studied cancer cell lines (breast: MCF-7; pancreatic: AsPC-1; and colorectal: HT-29 and Caco-2). It was able to reduce angiogenesis in AsPC-1 cells, presented a cytotoxic effect and increased malondialdehyde levels in HT-29 cells, and decreased growth of Caco-2 cells. These results suggest that this extract can be a source of several compounds which can be used in the formulation of dietary supplements or as a structural basis for antitumoral drugs, but their mechanistic actions still need to be assessed.

Comparative analysis of Nigella sativa L. oil extraction processes: impacts on chemical composition, antioxidant and antimicrobial properties

ABSTRACT This work intended to study differences in oil yield and co-extraction of antioxidant and antibacterial compounds of Nigella sativa L. seed oil as a function of two main extraction processes: mechanical pressing and solvent extraction, including hexane and chloroform. Next, we studied such oils’ chemical composition and antioxidant and antibacterial activities. Notably, the chemical cartelization was conducted by use of HPLC. The antioxidant activity of the oils was assessed using DPPH, TAC, and FRAP assays. Antimicrobial activity was investigated against bacteria and fungi with clinical importanceT. HPLC-DAD analysis identified some bioactive compounds in the oils, including thymoquinone, carvacrol, and gallic acid. Results showed that oils extracted by different methods exhibit varying levels of antioxidant activity, with a higher concentration of antioxidant compounds in chloroform-extracted oils. Antimicrobial tests revealed significant inhibitory effects of the studied oils on the growth of bacteria and fungi. In conclusion, this research has made it possible to characterize the oils extracted from Nigella sativa L. Seeds by determining their chemical composition and biological properties, notably their antioxidant, antibacterial, and antifungal activity. These results contribute to a better understanding of the potential benefits of these oils for human health and open up exciting prospects for their use in various fields, notably as food additives and therapeutic agents.

Cold Hydraulic Extraction Optimization and Characterization of Balanites aegyptiaca and Ceiba pentandra Seed Oils

Non-edible vegetable oils have a huge potential for many industrial applications. Most of them are expressed by mechanical pressing, but data on the different operating conditions to achieve optimal extraction yields and high-quality oil are scarce. Hence, the objective of this study was to optimize key hydraulic extraction parameters at ambient temperature (25 °C) of <em>Balanites aegyptiaca</em> and <em>Ceiba pentandra</em> oils by increasing the oil recovery. Optimal holding time, applied pressure, compression speed, and press cage charge were determined for whole and crushed oleaginous material. The results indicate that the <em>B.aegyptiaca </em>kernels and <em>C.pentandra</em> seeds contained 2.7 and 5.7% moisture, as well as 46.3 and 26.2% fat, respectively. Under the optimal operating conditions, the oil recovery (wt.%. d.b.) from whole (crushed) material was 73.4 (69.8) <em>B.aegyptiaca </em>kernels and 38.2 (41.2) <em>C.pentandra</em> seeds.<strong> </strong>The extracted oils have a high content of unsaturated fatty acids including of about 74 wt.% for <em>B. aegyptiaca</em> and 69 wt.% for <em>C.pentandra</em>. They were particularly rich in linoleic ω-6 acid, 45.32 and 38.77 wt.%, respectively. The chemical characteristics of cold-extracted <em>B. aegyptiaca</em> and <em>C.pentandra</em> oils were 10 and 20 ppm phosphorus, 2.8 and 3.5 ppm iron, 0.0 ppm copper, 0.06 and 0.1% water-volatile matter, respectively. These valuable material properties make the <em>B.aegyptiaca</em> and <em>C.pentandra</em> oils an ecological and renewable resource for multipurpose applications.

Multi-stimulus perception and visualization by an intelligent liquid metal-elastomer architecture.

Multi-stimulus responsive soft materials with integrated functionalities are elementary blocks for building soft intelligent systems, but their rational design remains challenging. Here, we demonstrate an intelligent soft architecture sensitized by magnetized liquid metal droplets that are dispersed in a highly stretchable elastomer network. The supercooled liquid metal droplets serve as microscopic latent heat reservoirs, and their controllable solidification releases localized thermal energy/information flows for enabling programmable visualization and display. This allows the perception of a variety of information-encoded contact (mechanical pressing, stretching, and torsion) and noncontact (magnetic field) stimuli as well as the visualization of dynamic phase transition and stress evolution processes, via thermal and/or thermochromic imaging. The liquid metal-elastomer architecture offers a generic platform for designing soft intelligent sensing, display, and information encryption systems.

Lightweight, Strong, and Transparent Wood Films Produced by Capillary Driven Self-Densification.

Wood delignification and densification enable the production of high strength and/or transparent wood materials with exceptional properties. However, processing needs to be more sustainable and besides the chemical delignification treatments, energy intense hot-pressing calls for alternative approaches. Here, this study shows that additional softening of delignified wood via a mild swelling process using an ionic liquid-water mixture enables the densification of tube-line wood cells into layer-by-layer sheet structures without hot-pressing. The natural capillary force induces self-densification in a simple drying process resulting in a transparent wood film. The as-prepared films with ≈150µm thickness possess an optical transmittance ≈70%, while maintaining optical haze >95%. Due to the densely packed sheet structure with a large interfacial area, the reassembled wood film is fivefold stronger and stiffer than the delignified wood in fiber direction. Owing to a low density, the specific tensile strength and elastic modulus are as high as 282MPacm3g-1 and 31GPacm3g-1. A facile and highly energy efficient wood nanotechnology approach are demonstrated toward more sustainable materials and processes by directly converting delignified wood into transparent wood omitting polymeric matrix infiltration or mechanical pressing.

Facile Nanowelding Process for Silver Nanowire Electrodes Toward High‐Performance Large‐Area Flexible Organic Light‐Emitting Diodes

AbstractDespite considerable interest, uniform and robust flexible transparent conducting electrodes (FTCEs) that can be seamlessly integrated and used for highly efficient large‐area flexible oganic light‐emitting diodes (OLEDs) remain elusive. In this study, a large‐area fabrication of uniform transparent electrodes for high‐performance flexible OLEDs by exploiting the rapid nanowelding process of silver nanowires (AgNWs) onto polyethylene terephthalate substrate under Xe‐lamp irradiation and mechanical pressing treatment is reported. The performance of AgNWs FTCEs is significantly enhanced by applying the Xe‐lamp beam irradiation for 5 s and subsequent compression at 20 MPa for 15 s, achieving a low sheet resistance of 26.5 Ω sq−1, a high transmittance of 95.2% (at 550 nm), and very smooth surfaces with root‐mean‐square of 5.4 nm. Meanwhile, the nanowelded AgNWs FTCEs maintain excellent electrical conductivity (only a 2.96% increase in ΔR/R0) after 1000 bending cycles. The resulting AgNWs FTCEs‐based green phosphorescent OLED achieves an unprecedented external quantum efficiency (EQE) of 23.7% and a current efficiency as high as 81.5 cd A−1. Benefiting from the uniform properties for resulting AgNWs FTCEs, the fabricated flexible OLED with a large area of 25 × 25 mm2 still retains a high EQE of 22.2% and a current efficiency of 78.0 cd A−1.

Combined leaching and steam explosion pretreatment of lignocellulosic biomass for high quality feedstock for thermochemical applications

A novel pretreatment approach was developed in the present study to simultaneously reduce the content of inorganic troubling elements (TEs) and improve biomass energy density, i.e., combined leaching and steam explosion (SE) pretreatment with mechanical pressing. Three different high-ash-containing biomass feedstocks were studied – wheat straw (WS), spruce bark (SB), and empty fruit bunches of oil palm (EFB). Before studying the combined pretreatment, the impact of individual pretreatment was determined in-depth on biomass composition and ash-transformation behaviour. In leaching pretreatment, the effect of leaching with steam explosion condensate (SEC), dilute acetic acid and water was studied comprehensively. The solid (raw and treated) and liquid samples (leachate, SEC, hydrolysate) were characterized for a detailed comparative analysis. The ash-fusion and −transformation behaviour of raw and pretreated biomass was studied in-depth using advanced multicomponent thermodynamic equilibrium modelling (TEM) and push-rod dilatometry. After combined pretreatment, a considerably high reduction in TEs content was noted: 82–98 % K, 93–99 % Na, 80–99 % Cl, 34–90 % S, 3–77 % Mg, ash 43–63 %, 26–67 % P, and 19–63 % Ca. Simultaneously, heating values of all three feedstocks increased by 1.3–2.3 MJ/kg, reaching up to 20–22 MJ/kg. TEM results reveal that much lesser amounts of molten slag and volatile inorganic compounds were formed in pretreated samples compared to raw and SE biomass, such as K2Si5MgO12, KCl, KPMgO4, K2Si2O5, CaSiO3, and MgSiO3 in WS; Na2CO3, K2CO3, K2CaC2O6, KPMgO4, and CaCO3 in SB. Due to higher energy density and lower propensity towards ash-related issues, combined pretreated WS and SB have a high potential to be used in large-scale thermochemical applications.

Enzyme‐assisted extraction of rapeseed oil with minimum water addition: a proof‐of‐concept study

SummaryThe increased demand for vegetable oils calls for new strategies for enhancing the yield of mechanical oil extraction, preferably without the use of potentially hazardous solvents such as n‐hexane. Enzyme‐assisted oil extraction has been studied under aqueous conditions, where the oil recovery was enhanced due to the partial enzymatic breakdown of cell wall compounds. However, this process is often not feasible for industrial applications, where mechanical pressing of dry seeds is implemented. This study provides a proof‐of‐concept for enzyme‐assisted rapeseed oil extraction with minimum water addition (1 mL per 100 g rapeseeds). The application of cellulytic and pectolytic enzymes increased the reducing sugar content as a result of the carbohydrate breakdown. The oil recovery in the mechanical pressing was increased significantly from ~60% to ~65%, and the quality of the oils was not significantly affected by the enzyme treatment.

Effect of Photoanode Process Sequence on Efficiency of Dye-Sensitized Solar Cells

Owing to its contribution to carbon emission reduction, green energy has received widespread attention. Among green energy sources, solar energy is regarded as the most important. In solar energy production, dye-sensitized solar cells (DSSCs) have been favored owing to their characteristics of simple manufacturing and high efficiency as a third-generation solar cell technology. DSSCs are prospective candidates for powering indoor Internet of Things (IoT) devices. In this study, to find a method to enhance DSSCs’ efficiency, the advantages and disadvantages of the screen printing method and the mechanical pressing and annealing method were analyzed. Using an improved method, a TiO2 photoanode was processed and annealed, and the DSSCs with the photoanode showed an efficiency increase from 1.10 to 4.78%.

Aqueous enzymatic extraction of macauba (Acrocomia aculeata) pulp oil: A green and sustainable approach for high-quality oil production

Aqueous enzymatic extraction (AEE) of macauba pulp oil (MPO) was performed in this study with five commercial enzymatic pools. The chemical, nutritional, and thermal properties of the oils with high oil efficiency by AEE were evaluated and compared with mechanical pressing (MP) and organic solvent extraction (SE). Among the AEE processes, the pectinase pool (at pH 5.5 and 50 °C) exhibited the highest process efficiency (88.6 %). The oils presented low acidity values (0.4–3.1 %) and low molar absorptivities, indicating minimal oil degradation. Bioactive compounds, such as carotenoids, were found in MPO. The iodine index and the fatty acid profile of the oils revealed a high content of unsaturated fatty acids, particularly oleic and linoleic acids, with excellent nutritional scores, as evidenced by anti-atherogenicity and anti-thrombogenicity indices. These findings emphasized that AEE is an eco-friendly approach for extracting high-quality MPO with beneficial health compounds for food products.

Margarida avocado oil: Effect of processing on quality, bioactive compounds and fatty acid profile

The aim of this study was to evaluate the impact of different pulp drying processes and extracting methods of avocado oil (Margarida), determined by quality indices, bioactive compounds and fatty acid profile. The avocado pulp was dried in air circulation oven at 40 °C and 60 °C, and in vacuum oven at 60 °C. The oil was extracted by mechanical press or by Soxhlet method. The acidity, peroxide value, iodine, refractive indices; phenolic compounds; carotenoids; chlorophyll; tocopherols; antioxidant activity; fatty acid profiles; ratio between hypocholesterolemic and hypercholesterolemic fatty acids (h/H); atherogenic and thrombogenic indices, besides avocado pulp characteristics were evaluated. The best oil quality was found for pulp dried at 60 °C under vacuum combined with Soxhlet extraction. The content of bioactive compounds was higher when the pulp was dried at 60 °C in an oven with air circulation combined with mechanical pressing. No significant effect was observed on the fatty acid profile. The atherogenic and thrombogenic indices showed low values and h/H ratio, within the desirable. The results showed advantage in drying the pulp at 60 °C. The oil evidenced being a good source of bioactive compounds, presenting an interesting fatty acid profile, h/h ratio, atherogenic and thrombogenic indices.