scholarly journals THE POTENTIAL OF NANOCELLULOSE FROM Acacia mangium PULP FOR SPECIALTY PAPER MAKING

2016 ◽  
Vol 3 (01) ◽  
Author(s):  
Nursyamsu Bahar ◽  
Taufan Hidayat ◽  
Nina Elyani ◽  
Ike Rostika
Keyword(s):  
Kraft Pulp ◽  
Acacia Mangium ◽  
Physical Property ◽  
High Strength ◽  
Particle Sizes ◽  
Product Packaging ◽  
Paper Making ◽  
Reinforcing Agent ◽  
Oil Penetration ◽  
Oily Product

The goals of this research is to use nanocellulose as an additive for reinforcing agent in papermaking for reducing the beating process and the amount of NBKP continue with applying to specialty paper. In this research, nanocellulose was created from Acacia mangium pulp in water using disc refiner and made them homogenized with ultra turrax and ultra sonic as homogenizer. Research had been conducted in three variations of particle sizes, five variations of nanocellulose concentrations and 2 two variations of pulp compositions. The nanocellulose was added to the stock of Leaf Bleach Kraft Pulp (LBKP) and Needle Bleach Kraft Pulp (NBKP) for sheet papermaking. The structure of nanocellulose was determined by XRD, SEM, TEM, and PSA. The physical property of paper was determined by TAPPI standard and SNI.. The result showed that smaller particle gave higher reinforcing effect. The addition of 2% of nanocellulose (70 nm) increased the elongation by 24% and TEA by 50% while porosity decreased by 50%. It showed that nanocellulose have great potential as reinforcing agent in papermaking. It can be used in specialty paper such as security paper which requires high strength and glassine paper, which needs low porosity to reserve its oil penetration and use for oily product packaging. Keywords: nanocellulose, Acacia mangium, reinforcing agent, specialty paper  ABSTRAKTujuan dari penelitian ini adalah menggunakan nanoselulosa sebagai additive untuk meningkatkan kekuatan pada pembuatan kertas serta mengurangi energi proses penggilingan dan penggunaan NBKP serta diaplikasikan untuk kertas khusus. Pada penelitian ini nanoselulosa dibuat dari pulp Acacia mangium dalam air menggunakan disc refiner dan di buat homogen dengan ultra turrax dan ultra sonic. Penelitian ini dilakukan dengan tiga variasi ukuran partikel, lima variasi konsentrasi nanoselulosa, dan dua variasi komposisi pulp. Nanoselulosa ditambahkan pada stok dari pulp kayudaun (LBKP) dan pulp kayujarum (NBKP) pada pembuatan lembaran kertas. Struktur nanoselulosa diuji dengan menggunakan XRD, SEM, TEM dan PSA serta kekuatan fisik kertas ditentukan dengan menggunakan standard TAPPI dan SNI. Hasil penelitian menunjukkan bahwa partikel dengan ukuran yang lebih kecil memberikan efek peningkatan kekuatan yang lebih tinggi. Penambahan 2% nanoselulosa (70 nm) meningkatkan elongation sebanyak 24% dan TEA 50% sedangkan porositas turun sebanyak 50%, Hal ini menunjukkan bahwa nanoselulosa dapat digunakan untuk pembuatan kertas khusus seperti kertas sekuritas yang memerlukan kekuatan yang tinggi dan kertas glasin yang memerlukan porositas yang rendah dan untuk menghindarkan dari penetrasi minyak dan digunakan untuk kemasan dari bahan yang berminyak.Kata kunci: nanoselulosa, Acacia mangium, reinforcing agent, kertas khusus

scholarly journals Facile Synthesis and Characterization of Palm CNF-ZnO Nanocomposites with Antibacterial and Reinforcing Properties

2021 ◽  
Vol 22 (11) ◽  
pp. 5781
Author(s):  
Janarthanan Supramaniam ◽  
Darren Yi Sern Low ◽  
See Kiat Wong ◽  
Loh Teng Hern Tan ◽  
Bey Fen Leo ◽  
...  
Keyword(s):  
Plant Biomass ◽  
Cellulose Nanofibers ◽  
High Strength ◽  
Salmonella Typhi ◽  
Particle Sizes ◽  
Mechanical Reinforcement ◽  
Uniform Size ◽  
Preparation Methods ◽  
Potential Applications

Cellulose nanofibers (CNF) isolated from plant biomass have attracted considerable interests in polymer engineering. The limitations associated with CNF-based nanocomposites are often linked to the time-consuming preparation methods and lack of desired surface functionalities. Herein, we demonstrate the feasibility of preparing a multifunctional CNF-zinc oxide (CNF-ZnO) nanocomposite with dual antibacterial and reinforcing properties via a facile and efficient ultrasound route. We characterized and examined the antibacterial and mechanical reinforcement performances of our ultrasonically induced nanocomposite. Based on our electron microscopy analyses, the ZnO deposited onto the nanofibrous network had a flake-like morphology with particle sizes ranging between 21 to 34 nm. pH levels between 8–10 led to the formation of ultrafine ZnO particles with a uniform size distribution. The resultant CNF-ZnO composite showed improved thermal stability compared to pure CNF. The composite showed potent inhibitory activities against Gram-positive (methicillin-resistant Staphylococcus aureus (MRSA)) and Gram-negative Salmonella typhi (S. typhi) bacteria. A CNF-ZnO-reinforced natural rubber (NR/CNF-ZnO) composite film, which was produced via latex mixing and casting methods, exhibited up to 42% improvement in tensile strength compared with the neat NR. The findings of this study suggest that ultrasonically-synthesized palm CNF-ZnO nanocomposites could find potential applications in the biomedical field and in the development of high strength rubber composites.

scholarly journals Controlling the Thermal Stability of Kyanite-Based Refractory Geopolymers

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2903
Author(s):  
Juvenal Giogetti Nemaleu Deutou ◽  
Rodrigue Cyriaque Kaze ◽  
Elie Kamseu ◽  
Vincenzo M. Sglavo
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
High Strength ◽  
Treatment Temperature ◽  
Strength Development ◽  
Particle Sizes ◽  
Cold Setting ◽  
Thermal Stability Of ◽  
Geopolymer Composites ◽  
Refractory Composites

The present project investigated the thermal stability of cold-setting refractory composites under high-temperature cycles. The proposed route dealt with the feasibility of using fillers with different particle sizes and studying their influence on the thermo-mechanical properties of refractory geopolymer composites. The volumetric shrinkage was studied with respect to particle sizes of fillers (80, 200 and 500 µm), treatment temperature (1050–1250 °C) and amount of fillers (70–85 wt.%). The results, combined with thermal analysis, indicated the efficiency of refractory-based kyanite aggregates for enhancing thermo-mechanical properties. At low temperatures, larger amounts of kyanite aggregates promoted mechanical strength development. Flexural strengths of 45, 42 and 40 MPa were obtained for geopolymer samples, respectively, at 1200 °C, made with filler particles sieved at 80, 200 and 500 µm. In addition, a sintering temperature equal to 1200 °C appeared beneficial for the promotion of densification as well as bonding between kyanite aggregates and the matrix, contributing to the reinforcement of the refractory geopolymer composites without any sign of vitrification. From the obtained properties of thermal stability, good densification and high strength, kyanite aggregates are efficient and promising candidates for the production of environmentally friendly, castable refractory composites.

Preparation and Properties of Lightweight, High-Strength Insulation Materials Using Fly Ash Floating Beads

2016 ◽  
Vol 697 ◽  
pp. 599-603
Author(s):  
Ya Peng Dai ◽  
Xing Yong Gu ◽  
Wei Xia Dong ◽  
Ting Luo
Keyword(s):  
Compressive Strength ◽  
Heat Conduction ◽  
Fly Ash ◽  
High Strength ◽  
Volume Density ◽  
Particle Sizes ◽  
Heat Conduction Coefficient ◽  
Insulation Materials ◽  
Test Instrument ◽  
Save Energy

In our paper, to save energy conservation and environmental protection, and in view of waste fly ash floating bead with excellent properties such as light and refractory, lightweight insulation materials was prepared using fly ash floating beads as the main materials. Firstly, two different fly ash floating bead contents on the properties of the light and refractory material were investigated. Then, on the basis of the optimum fly ash floating bead content, effects of various different particle sizes and firing temperature on the bulk density, compressive strength and the heat conduction coefficients of the samples were studied. The microstructure of the light-weight refractory materials was characterized by XRD and SEM. The heat conduction coefficient (λ') of the samples were also measured by the self-made test instrument. The experimental results showed that the properties of the as-prepared sample using 80% fly ash floating beads was superior to that of 95 % fly ash floating beads. The optimal volume density of 0.60-1.04 g/cm3, compressive strength of 10.6-39.5 MPa and the heat conduction coefficient of 0.183-0.25 °C·g/ min·cm2 were achieved in the presence of 80% fly ash floating beads with 120-160 particle size at 1200°C-1300°C, which has the potential application in lightweight insulation materials.

scholarly journals Pengaruh Alkali Aktif terhadap Karakteristik Pulp Kraft Putih Acacia mangium dan Eucalyptus pellita

2020 ◽  
Vol 10 (01) ◽  
pp. 9
Author(s):  
Teddy Kardiansyah ◽  
Susi Sugesty
Keyword(s):  
Kraft Pulp ◽  
Raw Materials ◽  
Acacia Mangium ◽  
Raw Material ◽  
Pests And Diseases ◽  
Pulp Industry ◽  
Elemental Chlorine ◽  
Eucalyptus Pellita ◽  
Free Process ◽  
Industrial Plantation

Industri pulp Indonesia saat ini memiliki masalah dalam penyediaan bahan baku kayu Acacia mangium, karena serangan penyakit tanaman dan hama. Hal ini harus diantisipasi melalui bahan baku alternatif pengganti Acacia mangium, spesies Eucalyptus pellita dipilih karena lebih tahan terhadap hama dan penyakit. Penelitian ini dilakukan untuk mengetahui karakteristik kualitas pulp kraft putih E. Pellita. Penelitian pembuatan pulp kertas dilakukan dengan proses kraft dengan bahan baku A. mangium dan E. pellita. Pemasakan dilakukan dengan variasi alkali aktif 16-20%, sulfiditas 28,7%, pada suhu 165 °C, rasio larutan pemasak terhadap kayu 3,5:1 dan faktor H 1.022. Pemutihan pulp dilakukan dengan proses ECF (Elemental Chlorine Free) dengan tahapan OD0EoD1. Karakteristik pulp kraft hasil pemasakan A. mangium lebih tinggi pada parameter rendemen tersaring, bilangan kappa dan viskositas dibandingkan dengan E. pellita. Penggunaan alkali aktif 16% pada pemasakan A. mangium lebih rendah dari  E. pellita (18%), namun kualitasnya dapat memenuhi spesifikasi kualitas pulp kraft putih sesuai SNI 6107:2015 (Pulp Kraft Putih Kayu daun) pada parameter derajat giling, derajat putih dan sifat fisik.  Karakteristik pulp kraft putih A. mangium lebih tinggi pada parameter derajat giling, derajat putih dan sifat fisik dibandingkan dengan E. pellita. Namun demikian E. pellita berpotensi untuk dikembangkan di Hutan Tanaman Industri sebagai bahan baku pulp.Effect of Active Alkali on Characteristic of Acacia mangium and Eucalyptus pellita Bleached Kraft PulpAbstractThe Indonesian pulp industry currently has problems in supplying Acacia mangium wood raw materials, due to plant disease and pest attacks. This could be anticipated through alternative raw materials to substitute Acacia mangium, the Eucalyptus pellita species chosen because it is more resistant to pests and diseases. This study was conducted to determine the quality characteristics of E. Pellita bleached kraft pulp. The research on making paper pulp using A. mangium and E. pellita was carried out by means of the kraft process. The cooking was carried out with a variation of 16-20% active alkali, 28.7% sulfidity, at a temperature of 165°C, a liquor to wood ratio of  3.5:1 and an H factor of 1.022. The bleaching of the pulp has been carried out using the ECF (Elemental Chlorine Free) process with the OD0EoD1 stage. Characteristics of kraft pulp from A. mangium cooking were higher in the screening yield, kappa number and viscosity compared to E. Pellita. The use of 16% active alkaline in cooking of  A. mangium is lower than E. pellita (18%), but the quality can meet the quality specifications of white kraft pulp according to SNI 6107: 2015 (White Kraft Leaf Wood Pulp) on the parameters of milled degree, whiteness and properties. The characteristics of A. mangium white kraft pulp were higher in parameters of grind degree, whiteness and physical properties compared to E. pellita. However, E. pellita has the potential to be developed in Industrial Plantation Forests as raw material for pulp. 

scholarly journals Comparison of the Ability of Several White-rot Fungi to Biobleach Acacia Oxygen-delignified Kraft Pulp

2019 ◽  
pp. 1-10
Author(s):  
Sitompul Afrida ◽  
Toshihiro Watanabe ◽  
Yutaka Tamai
Keyword(s):  
Kraft Pulp ◽  
Extracellular Enzymes ◽  
Low Cost ◽  
White Rot Fungi ◽  
Acacia Mangium ◽  
White Rot ◽  
Irpex Lacteus ◽  
Lentinus Tigrinus

Previous screening analyses demonstrated that the in vivo biobleaching activities of the white-rot fungi Irpex lacteus KB-1.1 and Lentinus tigrinus LP-7 are higher than those of Phanerochaete chrysosporium and Trametes versicolor. The purpose of the current study was to examine the production of extracellular enzymes of these four white-rot fungi grown on three types of low-cost media containing agricultural and forestry waste, and to evaluate the ability of the produced extracellular enzymes to biobleach Acacia oxygen-delignified kraft pulp (A-OKP). The biobleaching activity of extracellular fractions of I. lacteus, L. tigrinus, T. versicolor, and P. chrysosporium cultures was the most pronounced after 3 days of incubation with Acacia mangium wood powder supplemented with rice bran and 1% glucose (WRBG) with resultant Kappa number reduction of 4.4%, 6.7%, 3.3%, and 3.3%, respectively. Therefore, biobleaching ability of I. lacteus and L. tigrinus have been shown to be higher than of T. versicolor and P. chrysosporium, both in vivo and in vitro.

scholarly journals Toleransi Tanaman Akasia (Acacia Mangium Wild.) terhadap Tingkat Salinitas di Pembibitan

2016 ◽  
Vol 3 (2) ◽  
pp. 54-62
Author(s):  
Elfarisna Elfarisna ◽  
Hermawan Niaga ◽  
Rita Tri Puspitasari
Keyword(s):  
Urban Areas ◽  
Block Design ◽  
Acacia Mangium ◽  
Dry Weight ◽  
Agricultural Extension ◽  
Raw Material ◽  
Plant Tolerance ◽  
Paper Making ◽  
Randomized Complete Block Design ◽  
Salinity Levels

Acacia is a plant that can be used as the main ingredient of paper making. The potential of acacia wood pulp as the raw material is already widely recognized by the timber industry. Acacia also has potential as a plant greenery in urban areas. Production of acacia plants can be done through the efforts of agricultural extension. Enterprises agricultural extension can be done by expanding the agricultural frontier acacia plants in saline land. The purpose of the study to know acacia plant tolerance to salinity levels in the nursery. The research was conducted from April to July 2013 in the experimental garden of the Faculty of Agriculture, University of Muhammadiyah Jakarta. The research is used Randomized Complete Block Design (RCBD) with five treatments NaCl level concentration, ie P1 Without NaCl/Control, P2 (0.5% concentration) P3 (concentration of 1%), P4 (1.5% concentration) and P5 (concentration of 2%). Parameters measured were percentage growth, plant height, leaf number, stem diameter, plant fresh weight and dry weight of plants. The results showed salinity level significantly affected all parameters observed. A salt concentration of 1% is the maximum saline tolerance conditions for growth acacia.

scholarly journals Effects of Preparation Method on the Physicochemical Properties of Cationic Nanocellulose and Starch Nanocomposites

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1702 ◽  
Author(s):  
Lina Han ◽  
Wentao Wang ◽  
Rui Zhang ◽  
Haizhou Dong ◽  
Jingyuan Liu ◽  
...  
Keyword(s):  
Food Packaging ◽  
Preparation Method ◽  
Barrier Properties ◽  
Decomposition Temperature ◽  
Suspension Stability ◽  
Particle Sizes ◽  
Aspect Ratios ◽  
Reinforcing Agent ◽  
Lower Maximum ◽  
Starch Films

Nanocellulose (NC) has attracted attention in recent years for the advantages offered by its unique characteristics. In this study, the effects of the preparation method on the properties of starch films were investigated by preparing NC from cationic-modified microcrystalline cellulose (MD-MCC) using three methods: Acid hydrolysis (AH), high-pressure homogenization (HH), and high-intensity ultrasonication (US). When MD-MCC was used as the starting material, the yield of NC dramatically increased compared to the NC yield obtained from unmodified MCC and the increased zeta potential improved its suspension stability in water. The NC prepared by the different methods had a range of particle sizes and exhibited needle-like structures with high aspect ratios. Fourier transform infrared (FTIR) spectra indicated that trimethyl quaternary ammonium salt groups were introduced to the cellulose backbone during etherification. AH-NC had a much lower maximum decomposition temperature (Tmax) than HH-NC or US-NC. The starch/HH-NC film exhibited the best water vapor barrier properties because the HH-NC particles were well-dispersed in the starch matrix, as demonstrated by the surface morphology of the film. Our results suggest that cationic NC is a promising reinforcing agent for the development of starch-based biodegradable food-packaging materials.

Response of Eucalyptus camaldulensis and Acacia mangium kraft pulp in different ECF bleaching options

2010 ◽  
Vol 45 (3) ◽  
pp. 473-485 ◽  
Author(s):  
Md. Rezaul Karim ◽  
Md. Nazrul Islam ◽  
Raimo O. Malinen
Keyword(s):  
Kraft Pulp ◽  
Acacia Mangium ◽  
Eucalyptus Camaldulensis ◽  
Ecf Bleaching

Application of DSA to improve strength of thermomechanical pulp blended paper

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Cheol Woo Lee ◽  
Jeong Yong Ryu
Keyword(s):  
Kraft Pulp ◽  
High Strength ◽  
Thermomechanical Pulp ◽  
Paper Strength ◽  
Bleached Kraft Pulp ◽  
Degree Of Refining ◽  
Strength Improvement

Abstract A more efficient application of a dry strength agent (DSA) was investigated to improve the strength of thermomechanical pulp (TMP) blended paper. Strength improvement by DSA application was more effective for hardwood bleached kraft pulp (Hw-BKP) than TMP. The degree of strength improvement of DSA further increased with the increasing degree of refining of Hw-BKP. The strength of the paper was decreased by the fines fractionation of TMP, but the strength improvement efficiency of DSA for the fines fractionated TMP increased. In order to increase the strength of TMP mixed paper using DSA, it is expected that DSA should be adsorbed only to Hw-BKP with high strength improvement efficiency, not TMP fines. When the DSA was mixed with Hw-BKP before contact with other stocks, it was confirmed that the effect of improving the strength by the DSA is the best. The strength improving effect increased as TMP fines were removed. Therefore, to improve the strength of the paper containing TMP in Hw-BKP by adding a DSA, it is preferable to selective apply the DSA to Hw-BKP while blending only the fibers of TMP by fractionation.

Reinforcing potential of wood pulp-derived microfibres in a PVA matrix

Holzforschung ◽  
2006 ◽  
Vol 60 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Ayan Chakraborty ◽  
Mohin Sain ◽  
Mark Kortschot
Keyword(s):  
Tensile Strength ◽  
Aspect Ratio ◽  
Polyvinyl Alcohol ◽  
Microcrystalline Cellulose ◽  
Comparative Studies ◽  
Kraft Pulp ◽  
Fold Increase ◽  
Minimum Length ◽  
Reinforcing Agent ◽  
Softwood Kraft Pulp

Abstract In this study, the reinforcing potential of cellulose “microfibres” obtained from bleached softwood kraft pulp was demonstrated in a matrix of polyvinyl alcohol (PVA). Microfibres are defined as fibres of cellulose of 0.1–1 μm in diameter, with a corresponding minimum length of 5–50 μm. Films cast with these microfibres in PVA showed a doubling of tensile strength and a 2.5-fold increase in stiffness with 5% microfibre loading. The theoretical stiffness of a microfibre was calculated as 69 GPa. The study also demonstrated that the strength of the composite was greater at 5% microfibre loading compared to 10% loading. Comparative studies with microcrystalline cellulose showed that the minimum aspect ratio of the reinforcing agent is more criticalthan its crystallinity in providing reinforcement in the composite.

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