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All Journal Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) Jurnal Sylva Lestari
Lubis, Muhammad Adly Rahandi
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Hydrolytic Stability of Sengon-Oriented Strand Board Bonded with Hybrid Phenol-Formaldehyde/Polymeric Methylene Diphenyl Diisocyanate Adhesives Sari, Rita Kartika; Fitrianum, Fadilah; Maulana, Muhammad Iqbal; Hidayat, Wahyu; Winarni, Ina; Iswanto, Apri Heri; Lubis, Muhammad Adly Rahandi
Jurnal Sylva Lestari Vol. 12 No. 3 (2024): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v12i3.987

Abstract

The hydrolytic stability of oriented strand board (OSB) is critical to guarantee good performance in humid conditions over the long term. The adhesive system impacts hydrolytic stability in addition to the wood strands. This study aims to investigate the hydrolytic stability of OSB bonded with a hybrid adhesive based on phenol-formaldehyde (PF) and polymeric methylene diphenyl diisocyanate (pMDI) modified with NaOH and CaCO3 catalyst. PF was mixed with each catalyst at approximately 1% of the PF solids content. The pMDI was added to the mixture at 2.5% and 5% of the PF solid content. The hybrid PF/pMDI adhesives were then used for OSB production. The hydrolytic stability of OSB samples was tested at 25°C and 100°C and compared with OSB using unmodified PF as a control. After hydrolysis, OSBs with hybrid PF/pMDI adhesives had lower weight loss than control adhesives at both temperatures. The pH indicates no significant polymer dissolution from the board into the hydrolysis solution. Hybrid PF/pMDI adhesives with a CaCO3 catalyst obtain significantly lower thickness swelling values. The findings of this study have significant implications for developing high-performance, environmentally-friendly OSB products. Keywords: eco-friendly composite, hydrolytic stability, oriented strand board, Paraserianthes falcataria, phenol-formaldehyde
Ramie Fibers from Agroforestry System as Sustainable Materials for Functional Textiles: A Review Aristri, Manggar Arum; Hidayat, Wahyu; Iswanto, Apri Heri; Lubis, Muhammad Adly Rahandi
Jurnal Sylva Lestari Vol. 12 No. 3 (2024): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v12i3.986

Abstract

Agroforestry system is a form of integrated land use involving forestry and agriculture, which is expected to help overcome the problems of increasing demand for agricultural land, decreasing environmental quality and poverty rates, and resulting in increasingly complex global issues. This system includes a combination of forestry crops with agricultural crops or other plants that can grow together on the same land. The application of agroforestry can improve agricultural welfare, overcome the environmental crisis and poverty, and maintain the sustainability of natural resource conservation. Ramie (Boehmeria nivea) fiber is an interesting plant to cultivate using an agroforestry system. It is easy to cultivate, positively impacts the environment, and has many application benefits because it is known as a strong and long-lasting fiber. On the other hand, the textile industry in Indonesia still predominantly uses cotton fiber which has low productivity, so the value of cotton imports increases yearly. Given the increasing demand for environmentally friendly and sustainable textiles, researchers and industry stakeholders are looking for other materials that provide functionality and environmental advantages. Ramie fiber is a type of natural fiber with advantages compared to other natural fibers, such as tensile strength, mechanics, and cellulose content, which has similar characteristics to cotton so that ramie can be applied as a functional textile material to replace cotton. This review paper aims to provide an in-depth overview of all ramie fiber properties, methods, and applications for functional textiles. This article highlights the environmental benefits of ramie fiber and its potential to encourage a more sustainable textile industry, citing various sources. Keywords: agroforestry, forestry crops, functional textile, ramie fiber, ramie’s properties
Carboxymethyl holocellulose as alternative carbohydrate-based binder for biomass briquette development Dewantoro, Awaly Ilham; Fauzan, Muklis; Lubis, Muhammad Adly Rahandi; Nurliasari, Desy; Mardawati, Efri
Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) Vol 7, No 4 (2024)
Publisher : Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.afssaae.2024.007.04.2

Abstract

The use of starch as a binder in biomass briquette production raises concerns regarding food security, prompting the need for alternative, non-food-based binders. This study aimed to develop carboxymethyl holocellulose (CMH) derived from oil palm empty fruit bunches (OPEFBs) as a sustainable and effective binder for biomass briquettes made from coconut shells and sawdust. The OPEFBs were converted into CMH through a carboxymethylation process, yielding a product with a carboxyl content of 12.81% and a degree of substitution (DS) of 0.40, indicating effective modification. The synthesized CMH was used as a binder at various concentrations, with citric acid (CA) employed as a crosslinking agent. The total carboxyl content significantly increased with higher CA concentrations, demonstrating improved functional properties. Briquettes produced using CMH exhibited favorable proximate characteristics, such as low moisture content, high fixed carbon, and enhanced calorific value, particularly for coconut shell-based briquettes. The findings suggest that CMH can serve as an alternative to starch, providing sustainable and environmentally friendly solutions for biomass briquette production. Future studies should focus on optimizing the synthesis process and exploring CMHs’ performance in diverse biomass formulations.
Characteristics of Cold-Setting Adhesive Derived from Waste Styrofoam for Bonding Laminated Gmelina (Gmelina arborea) Wood Karliati, Tati; Dungani, Rudi; Hadiyane, Anne; Hidayat, Wahyu; Lubis, Muhammad Adly Rahandi
Jurnal Sylva Lestari Vol. 13 No. 2 (2025): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i2.1080

Abstract

Developing cold-setting adhesives derived from waste styrofoam (WS) of expanded polystyrene foam for laminated gmelina wood involves innovative recycling of WS into functional adhesives. As a type of thermoplastic polymer, WS can be used as an adhesive at room temperature. In this study, WS was functionalized into cold-setting adhesives through dissolution and cross-linking reaction with methylene diphenyl diisocyanate (MDI) at a concentration of 40% w/v at 60°C. The mixture was then stirred at 200 rpm for 30 minutes. The adhesive is characterized by its ability to be set at room temperature, offering environmental benefits and practical applications in wood lamination. Solids content, gelation time, viscosity, cohesion strength, functional group analysis, morphological features, and curing temperature analysis were performed to characterize the cold-setting adhesives. The WS-MDI-40% had 62.4% solids content, 906.8 mPa.s viscosity, 182.3 Pa cohesion strength, and 197.8 minutes of gelation time at room temperature. The adhesion performance was evaluated in laminated wood using gmelina wood at glue spread rates of 250 and 300 g/m2 and cold-pressed at various durations. The block shear strength value of laminated wood bonded with WS-MDI-40% at 300 g/m2 and cold-pressed for 24 hours was higher than that of other samples, reaching 8.2 MPa, which met the Japanese Agricultural Standard (JAS No. 234) for glued laminated timber, exceeding the minimum requirement of 5.4 MPa. Fourier transform infrared (FTIR) spectroscopy revealed that the cold-setting WS-MDI-40% were cross-linked via urethane linkages (R–NH–COO–R). The free –N=C=O groups could react with the –OH groups of gmelina wood to produce laminated wood during cold-pressing. This study suggested a recycling alternative of WS into a cold-setting wood adhesive for laminated wood, which can be utilized in interior applications. Keywords: adhesive, block shear strength, cohesion strength, cold-setting, gmelina wood
Effectiveness of Different Extraction Techniques on the Yield and Antityrosinase Activity of Merbau (Intsia bijuga (Colebr.) Kuntze) Wood Extract Sari, Ratih Afrida Lismana; Sari, Rita Kartika; Safitri, Utami Dyah; Aristri, Manggar Arum; Wahyuningrum, Maeda; Lubis, Muhammad Adly Rahandi
Jurnal Sylva Lestari Vol. 13 No. 3 (2025): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i3.1140

Abstract

This study employed various extraction techniques to determine the yield, phytochemical profile, and antityrosinase activity of merbau wood (Intsia bijuga (Colebr.) Kuntze) extracts. The extraction techniques consisted of two factors: the type of extraction methods (conventional maceration – CM, ultrasound-assisted extraction – UAE, and magnetic stirrer – MS) and the number of extraction repetitions (first repetition – F1, second repetition – F2, and third repetition – F3). The interaction of the extraction methods and the number of extractions affects the extraction yield, antityrosinase activity, and its phytochemical profile. Merbau wood extracted using the UAE-F1 extraction method resulted in the highest yield (13.38%). In contrast, the UAE-F3 extract showed the strongest antityrosinase activity (IC50 value of 1.548 ppm) and the highest total phenol content (692.86 mg/g AGE). Fourier transform infrared analysis of the F1 extract showed that all samples contained the same functional groups, namely C=C (1600–1475 cm-1) and O-H (3800–3000 cm-1), indicating structural similarity among the extracts. Merbau wood extraction using the UAE method, both in the first, second, and third extractions, produced the highest yield, antityrosinase activity, and total phenol content of the extract compared to the CM and MS extraction methods. Keywords: antityrosinase activity, Intsia bijuga, maceration, total phenolic content, ultrasound-assisted extraction
Durability to Natural Weathering of Methylene Diphenyl Diisocyanate-Bonded Bamboo Oriented Strand Board Lestari, Dini; Suwanda, Astri Aulia; Murda, Rio Ardiansyah; Maulana, Muhammad Iqbal; Augustina, Sarah; Rianjanu, Aditya; Taher, Tarmizi; Hidayat, Wahyu; Maulana, Sena; Lubis, Muhammad Adly Rahandi
Jurnal Sylva Lestari Vol. 12 No. 1 (2024): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v12i1.839

Abstract

This study aimed to examine the qualities of bamboo-oriented strand board (BOSB) made from Dendrocalamus asper bamboo strands, both with and without steam treatment. Furthermore, the effect of exposure length to natural weathering on the physical and mechanical characteristics of BOSB was examined. The steam treatment lasted one hour at 126°C and a pressure of 0.14 MPa. Methylene diphenyl diisocyanate (MDI) and paraffin were utilized as adhesives and additives, with concentrations of 5% and 1%, respectively, based on oven-dried weight. The BOSB was exposed to natural weathering in different exposure durations (0, 1, and 3 months) in Bukit Bogor Raya Pajajaran, West Java, Indonesia. Subsequently, the BOSB was tested for its physical and mechanical properties and retention value. The result showed that steam treatment improved the dimensional stability and mechanical properties of BOSB bonded with MDI adhesive more than untreated BOSB. However, steam treatment has a better protection level against natural degradation than untreated samples. These confirm that BOSB with steam treatment is a durable and sustainable construction material. Keywords: bamboo, methylene diphenyl diisocyanate, natural weathering, oriented strand board, steam treatment
Co-Authors Apri Heri Iswanto Augustina, Sarah Awaly Ilham Dewantoro Desy Nurliasari Dini Lestari, Dini Dungani, Rudi Dyah Safitri Efri Mardawati Fahriya Puspita Sari Faizatul FALAH Fauzan, Muklis Fitrianum, Fadilah Hadiyane, Anne Ina Winarni, Ina Ismayati, Maya Karliati, Tati Laksana, Raden Permana Budi Lee Seng Hua Lubos Kristak Manggar Arum Aristri Maulana, Muhammad Iqbal Maulana, Sena Nissa Nurfajrin Solihat Park, Byung Dae Petar Antov Rianjanu, Aditya Rita Kartika Sari Sari, Ratih Afrida Lismana Suwanda, Astri Aulia Tarmizi Taher Wahyu Hidayat Wahyu Hidayat Wahyuningrum, Maeda Widya FATRIASARI Yadav, Sumit Manohar Zaini, Lukmanul Hakim