[논문]Effects of Steam Treatment on Physical and Mechanical Properties of Bamboo Oriented Strand Board

Maulana, Sena; Busyra, Imam; Fatrawana, Adesna; Hidayat, Wahyu; Sari, Rita Kartika; Sumardi, Ihak; Wistara, I Nyoman Jaya; Lee, Seung Hwan; Kim, Nam Hun; Febrianto, Fauzi

doi:10.5658/wood.2017.45.6.872

Effects of Steam Treatment on Physical and Mechanical Properties of Bamboo Oriented Strand Board 원문보기

목재공학 = Journal of the Korean wood science and technology, v.45 no.6, 2017년, pp.872 - 882

Maulana, Sena (Department of Forest Products, Faculty of Forestry, Bogor Agricultural University, IPB Dramaga Campus) , Busyra, Imam (Department of Forest Products, Faculty of Forestry, Bogor Agricultural University, IPB Dramaga Campus) , Fatrawana, Adesna (Department of Forest Products, Faculty of Forestry, Bogor Agricultural University, IPB Dramaga Campus) , Hidayat, Wahyu (Department of Forestry, Faculty of Agriculture, University of Lampung) , Sari, Rita Kartika (Department of Forest Products, Faculty of Forestry, Bogor Agricultural University, IPB Dramaga Campus) , Sumardi, Ihak (School of Life Sciences and Technology, Institut Teknologi Bandung) , Wistara, I Nyoman Jaya (Department of Forest Products, Faculty of Forestry, Bogor Agricultural University, IPB Dramaga Campus) , Lee, Seung Hwan (Department of Forest Biomaterials Engineering, College of Forest and Environmental Science, Kangwon National University) , Kim, Nam Hun (Department of Forest Biomaterials Engineering, College of Forest and Environmental Science, Kangwon National University) , Febrianto, Fauzi (Department of Forest Products, Faculty of Forestry, Bogor Agricultural University, IPB Dramaga)

Abstract ▼ AI-Helper

The objective of this study was to evaluate the properties of bamboo oriented strand board (B-OSB) from andong (Gigantochloa psedoarundinacea) and betung (Dendrocalamus asper) with and without steam treatment. Strands were steam-treated at $126^{\circ}C$ for 1 h under 0.14 MPa pressure. The extractive content of bamboo strands before and after steam treatment were determined according to a standard (TAPPI T 204 om-88). Three-layer B-OSB with the core layer perpendicular to the surface and back layers were formed and binded with 8% of phenol formaldehyde (PF) resin with the addition of 1% of wax. The evaluation of physical and mechanical properties of the boards were conducted in accordance with the JIS A 5908:2003 standard. The results showed that steam treatment of bamboo strands significantly reduced the extractive content. Steam treatment tended to increase the dimensional stability and mechanical properties of B-OSB from andong and betung. The results showed that the dimensional stability and bending strength of B-OSB from betung was higher than those of andong. The internal bond strength of B-OSB from andong was higher than betung owing to a greater amount of extractives dissolved during the steam treatment.

주제어

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문제 정의

However, the effects of strand steam treatment on the properties of B-OSB binded with formaldehyde-based resin has not been reported. Therefore, the objective of this study is to evaluate the properties of B-OSB with and without steam treatment, using PF resins as adhesives.

제안 방법

The physical and mechanical properties of B-OSB were evaluated according to the procedure of JIS A 5908-2003 (JIS 2003) for particleboards. The physical properties evaluated were density, moisture content (MC), water absorption (WA), and thickness swelling (TS), while mechanical properties evaluated were modulus of rupture (MOR), modulus of elasticity (MOE), and internal bond (IB) strength.

대상 데이터

Chemical reagents were used for the determination of differeent extractive contens. Main equipments used in this study are band saw, circular saw, planer, disk flaker, kiln drying furnace, shieve, water bath, oven drier, digital weight scale, moisture meter, glue blending drum, spray gun, strand orienter, forming device, caliper, hot press, and universal testing machine (UTM) instron.

이론/모형

The extractive content of bamboo strands before and after steam treatment was analyzed in accordance with TAPPI standards. Samples were extracted using alcohol-benzene solvent following the procedure of TAPPI T 204 om-88 (TAPPI 1991).
The physical and mechanical properties of B-OSB were evaluated according to the procedure of JIS A 5908-2003 (JIS 2003) for particleboards. The physical properties evaluated were density, moisture content (MC), water absorption (WA), and thickness swelling (TS), while mechanical properties evaluated were modulus of rupture (MOR), modulus of elasticity (MOE), and internal bond (IB) strength.

성능/효과

The moisture content (MC) values of B-OSBs from andong were ranging between 9.38% and 10.38%, while betung between 9.38% and 10.33%. B-OSBs of both bamboo species were relatively homogeneous, showing no significant differences in the MC values between species and strand treatment.
4a). The results from ANOVA showed that bamboo species and strand treatment contributed significant effects on MOR values parallel to the grain direction. MOR values perpendicular to the grain of B-OSBs were ranging between 119-211kg/cm² and 157-242kg/cm² (Fig.
2b). The results of ANOVA revealed that bamboo species and strand treatment contributed significant effects on TS values, while the interaction between species and strand treatment showed no significant effect.
2a). The results of ANOVA revealed that bamboo species and strand treatment contributed significant effects on the WA property, while the interaction between species and strand treatment showed no significant effect. TS values after 24h of water immersion were ranging between 8.
5). The results of ANOVA showed that bamboo species and strand treatment had significant effects on the IB strength values of B-OSBs. Steam treatment of the strands improved the IB values of B-OSBs from andong and betung.
3b). The results of ANOVA showed that bamboo species and strand treatment had significant effects to MOE values in both parallel and perpendicular direction, while the interaction between species and strand treatment was insignificant.
The ANOVA results showed that the interaction between species and strand treatment had significant effects on MOR values perpendicular to the grain direction. The results revealed that bamboo species and strand treatment affected the bending strength of B-OSBs including MOE and MOR. Steam treatment decreased the extractive content of andong and betung (Table 1), resulting in a better strand adhession.
Two bamboo species, i.e. andong (Gigantochloa psedoarundinacea) and Betung (Dendrocalamus asper) were obtained from 3-year-old bamboo plantation in Sukabumi, West Java, Indonesia. PF resin was used as a binder.

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