Sansevieria trifasciata fiber (STF) has a high cellulose content and considerable potential as polymer composite reinforcement. This study aims to investigate the effect of alkali treatment on physicochemical properties, tensile strength, thermal surface characteristics STF. We explored chemical changes in STF that had undergone achieved an optimum increase 51.8 % by weight. Soaking for 120 minutes significantly changed its composition. XRD analysis results indicated crystallinity index size...

Alkali treatment is often used to improve the natural fiber's performance as a bio-composite reinforcement. However, residual alkali chemical that harmful environment. For this reason, fiber modification uses environmentally friendly enzymes. Bromelain an solution. with 2 g/l increased tensile strength of BPF by 8.29%. enzymes enhance thermal resistance and wettability, providing eco-friendly alternative modifying fibers. BPF, treated bromelain, sustainable, raw material ideal for enhancing...

Natural cellulose fibers have a great potential for the development of new alternative reinforcement materials that are used in various polymer composite applications. In this study, waru tree trunk fiber was extracted and treated with NaOH Silane. Meanwhile, characteristics chemical, morphological, mechanical, surfaces were determined through composition analysis, Fourier transforms infrared (FTIR), scanning electron microscope (SEM), single test. The results showed content increased...

Soybean stem waste can be transformed into soybean fibers for polymer composites using alkali treatment as a sustainable solution to address the significant problem of availability. SF density and thermal resistance increased with raise in NaOH concentration. The highest crystallinity index cellulose content were found at 3% Compared untreated SF, tensile strength treated improved significantly 180.99%. study indicates that has potential composite reinforcement, potentially replacing...

AISI 1020 steel is low-carbon with a carbon content of 0.20% and good ductility but low hardness. One the methods to increase hardness by infusing carbon. The addition carbon, called carburizing, was done heating at high enough temperature, namely austenite in an environment containing active atoms so that would diffuse into surface reach certain depth. After diffusion process, rapid cooling treatment (quenching) followed obtain harder surface, center ductile. carburizing process requires...

The issuance of Minister Trade Regulation Number 31 2023 concerning Business Licensing, Advertising, Guidance, and Supervision Actors in Electronic Commerce is the Indonesian government's effort to regulate digital trading activities, including those conducted through social commerce platforms like TikTok Shop. This regulation aims create a balanced trade ecosystem, ensure fair competition, protect micro, small, medium enterprises (MSMEs) midst rapid technological advancements. However,...

This study explores the unexpected positive correlation between women's labor force participation rate (WLFPR) and total fertility (TFR) observed in developed countries. Using secondary data from World Bank series (2011-2021) for top 20 countries based on Human Development Index (HDI) ranking, we analyze these two variables. The results reveal a statistically significant WLFPR TFR nations, suggesting that increased workforce is not directly associated with declining rates as developing...

Penyakit emerging dan re-emerging yang melanda peternakan ruminansia di Indonesia dalam dua tahun terakhir menyebabkan penurunan populasi ternak kerugian ekonomi besar. Program ini bertujuan meningkatkan kesadaran paramedik veteriner peternak deteksi dini penyakit melalui sosialisasi edukasi. Kegiatan dilaksanakan pada Agustus 2024 KUD Sembada Puspo, Kabupaten Pasuruan, melibatkan 35 peserta, termasuk ketua kelompok veteriner. Tahapan pelaksanaan meliputi pre-sosialisasi (engagement,...

Abstract The natural fiber is currently widely applied in aerospace applications and the transportation sector. problem that often arises area of failure can be hardly predicted. This condition making it difficult to use a more complex application. purpose this study investigate fracture woven composites. Hibiscus tiliaceus bast fibers, as reinforcement, were prepared with alkali treatment using NaOH solution then added by coupling agent. composite was formed arrangement 60:40 fiber-matrices...

The growing demand for advanced coatings in industries such as aerospace and automotive necessitates materials with superior hardness, wear resistance, thermal stability. Despite advancements ternary coatings, research on binary Titanium Nitride (TiN) remains limited, particularly optimizing deposition parameters lightweight aluminum substrates. This study aims to investigate the effects of sputtering parameters, specifically Ar:N₂ gas ratios durations, mechanical properties TiN Al 6011...

The purpose of this study is to determine the alkalization process effect bamboo petung fiber (Dendrocalamus Asper) on Tensile strength Polyester composite reinforced with fiber. expected increase bond between automatic and which in turn can tensile composite. In NaOH was used as an alkaline substance. alkali commonly a substance for various natural fibers reinforcing material. Alkalization done by soaking into solution at room temperature time variation 1 hour, 2 hours, 3 hours. After...

The increasingly widespread use of galvanized roofs certainly has an effect on the occupants in room below. Among them is a hot temperature. For that reason, it necessary to make new discoveries field composites natural materials overcome because most materials, especially stone, have low thermal conductivity, which means they can inhibit heat propagation. This study sought ascertain how much andesite stone powder, combined with epoxy, lower temperature when layered roof. Different amounts...

The aim of this research is to investigate the effect addition silane coupling agents Waru bast-polyester composite on tensile strength. Biocomposite an innovation in material engineering made from environment-friendly and potentially-developed bast fibers tree. fibers, as reinforcement, were prepared by alkali procces employing using 6% NaOH solution for 120 minutes then added agent with variation 0%, 0.25%, 0.5%, 0.75% 1.0%. biocomposite was formed continuous fiber arrangement 60:40...

The aim of this research is to investigate the hardness implant material Stainless Steel (SS) 316L due ball peening at low temperature. In paper, SS316L was conducted in various cryogenic steel mechanism bombarded on metal surface using ball. shot treatment performed for 10 minutes balls with size 5 mm and 6 Bar compressed air flow. temperatures were carried out at-35°C, -45°C, and-55°C respectively. results show that after processes increasing as decreasing temperature treatment.

Stainless steel, or also called as inox steel is a material that has resistivity to the oxide reaction in an oxygen-containing environment. This study uses AISI 316L stainless which biomedical implant raw obtains surface modification technique obtain new mechanical properties. Surface dry shot peening process by varying ball diameter abrasive on of at high speed. The used 440 C type with hardness level HRC 50-55. results show roughness will decrease along increasing (bigger) size used....

This study aims to determine the various effect of heat input due varied electric current on microstructure weld joints and bending strength 2 dissimilar metals (aluminum alloy 5052 galvanized steel) with Al-Si 4043 as filler. experimental research was worked out by varying which can then be calculated into a input. The inputs applied were 30.8 J / mm (70A), 35.2 (80A) 39.6 (90A) while protective gas flow rate used is 14 liters minute. showed that increase in greatly affects shape area...