[논문]톱밥과 왕겨 및 숯을 이용하여 제조한 보드의 성질

HWANG, Jung-Woo; OH, Seung-Won

doi:10.5658/wood.2020.48.1.61

톱밥과 왕겨 및 숯을 이용하여 제조한 보드의 성질
Properties of Board Manufactured from Sawdust, Ricehusk and Charcoal 원문보기

목재공학 = Journal of the Korean wood science and technology, v.48 no.1, 2020년, pp.61 - 75

HWANG, Jung-Woo (Department of Wood Science & Technology, Jeonbuk National University) , OH, Seung-Won (Department of Wood Science & Technology, Jeonbuk National University)

초록
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본 연구에서는 농업부산물인 왕겨와 제재과정에서 발생되는 톱밥에 환경 친화적인 소재인 숯을 첨가하여 왕겨와 숯의 혼합비율 및 밀도별로 보드를 제조한 후 용도개발을 위하여 물리적 성질을 조사하여 다음과 같은 결과를 얻었다. 왕겨 및 숯의 첨가율 별로 제조된 혼합보드의 수분흡수율과 두께팽윤율은 숯의 첨가율이 증가할수록 완만하게 감소하는 경향을 나타내었고, 또한 혼합보드의 밀도가 증가할수록 수분흡수율은 감소하고 두께팽윤율은 증가하는 경향을 나타냈다. 혼합보드의 박리강도는 밀도가 0.7g/㎤일 때 0.49N/㎟로 가장 높은 수치를 나타내었다. KSF 3104 파티클 보드의 품질기준을 만족시켰다. 왕겨 및 숯의 첨가율별로 제조된 혼합보드의 박리강도는 왕겨의 첨가율이 감소하고 숯의 첨가율이 증가할수록 박리강도가 완만하게 감소하는 경향을 나타냈다. 또한 KSF 3104 파티클 보드의 품질기준 왕겨와 숯의 비율이 35:5와 30:10일 때는 15.0형, 25:15와 20:20일 때 13.0형의 품질기준을 만족시켰다. 혼합보드의 밀도가 증가할수록 경도가 증가하는 경향을 나타냈고, 왕겨의 첨가율이 감소하고 숯의 첨가율이 증가할수록 경도는 감소하는 경향을 나타냈다.

Abstract ▼ AI-Helper

In this study, the environmentally friendly material charcoal was added to ricehusk, an agricultural by-product, and sawdust, which emerges during the sawing process, to produce board by mixing ratio and concentration levels of ricehusk and charcoal; it then investigated its physical properties for development purposes and achieved the following results. The water absorption and thickness swelling of the compounded board produced per adding ratio of ricehusk and charcoal showed a gradually decreasing tendency along with the increase in adding ratio of the charcoal, and as the density of the compounded board increased, the water absorption decreased, while the thickness swelling increased. The internal bond strength of the compounded board had indicated its highest value of 0.49N/㎟ at the density of 0.7g/㎤. This satisfied the quality standard for KSF 3104 Particleboard. The internal bond strength of the compounded board manufactured per adding ratio of ricehusk and charcoal showed a steady decrease with the decrease in the adding ratio of ricehusk, and an increase in the addingratio of the charcoal. Also, in cases when the ratio of the ricehusk and charcoal by KSF 3104 quality standard were 35:5 and 30:10, it satisfied the quality standard of 15.0-type, whereas it satisfied the 13.0-type quality standard if the ratios were 25:15 and 20:20. It showed a tendency of increasing hardness of the compounded board with the increase in density, and decreasing hardness with the increase in the adding ratio of the charcoal.

주제어

표/그림 (5)

표 Table 1. Characterisitcs of phenol-formaldehyde resin for the test
그림 Fig. 1. Relationship between water absorption of board and density and addition of charcoal (WA: Water absorption).
그림 Fig. 2. Relationship between thickness swelling of board and density and addition of charcoal (TS:Thickness swelling).
그림 Fig. 3. Relationship between internal bond strength of board and density and addition of charcoal (IB:Internal bond strength).
그림 Fig. 4. Relationship between brinell hardness strength of board and density and addition of charcoal (BH:Brinell hardness).

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제안 방법

For the manufacturing conditions of the board, the water content addingratio was fixed to 10%, the density was fixed to 0.6g/cm2, the adding quantities of sawdust, ricehusk and charcoalwere differentiated as 50:35:5, 50:30:10, 50:25:15 and 50:20:20 to produce 4 different kinds, and the adding quantities of sawdust, ricehusk and charcoal were fixed to 50:20:20 and had densities set to 0.5, 0.6, and 0.7g/cm3 to produce 6 sheets each, for a total number of 42 sheets.
5240 in which the adding ratios of ricehusk and charcoal can be seen as affecting the thickness swellingless. In order to confirm the precise effect of charcoal, it is considered to be necessary to carry out tests by further increasing the adding ratio of the charcoal.
In order to measure the water absorption and thickness swelling, a test specimen of 50mm × 50mm × 11mm was produced, on which a standard line was drawn along the middle in the direction of the width and length, and weight and dimensionswere measured.
This study had added the environmentally friendly material charcoal to ricehusk, an agricultural by-product, and sawdust which emerges during the sawing process to produce board per mixing ratio and concentration level of ricehusk and charcoal, investigated its physical properties for usage development purposes and achieved the following result.
This study manufactured board per mixing ratio and density of ricehusk and charcoal by adding charcoal, an environmentally friendly raw material, to ricehusk, an agricultural by-product, and sawdust which emerges during the sawing process, as a part of functional development, measured its physical properties and reviewed its usability.
In order to measure the internal bond strength, a test specimen of 50mm × 50mm × 11mm was produced, a standard line was drawn down the middle in the directions of its width and length, and dimensions were measured. To identify the adhesive performance of the board, metal blocks were added on both sides of the test specimen with hot melt resin according to KS F 3104 regulation, tensile load was applied to the test specimen surface in a perpendicular direction, maximum load (P) when the internal bond was destroyed was measured, and internal bond strength (IB) was calculatedby using the following formula (3). In this case, the tensile load speed was set to 2mm/min.

대상 데이터

In order to measure the internal bond strength, a test specimen of 50mm × 50mm × 11mm was produced, a standard line was drawn down the middle in the directions of its width and length, and dimensions were measured.

성능/효과

On the other hand, the internal bond strength of board manufactured at 0.6g/cm3 density by differentiating the adding ratios of ricehusk, charcoal, and setting the adding ratio of sawdust at 50% was shown as 0.25N/mm2 for a 35:5 ratio of ricehusk and charcoal, 0.25N/mm2 for 30:10, 0.23N/mm2 for 25:15, and 0.23N/mm2 for 20:20 in which itshowed a tendency of steadily decreasing internal bond strength as the adding ratio of ricehusk decreases, and that of charcoal increases.
1. The water absorption of the board manufactured by density by setting the addingratios of sawdust, ricehusk and charcoal at 50:20:20 showed that the resin-adding ratio at 10% was 131.19% when the density was 0.5g/cm², 96.26% when the density is 0.6g/cm², and 82.13% when at 0.7g/cm², indicating a tendency of reducing water absorption with anincrease in density. The relationship between the density and water absorption was indicated as a determination coefficient (R² ) of 0.

참고문헌 (23)

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원문보기 상세보기
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