이 연구는 코르크보드를 보강하여 건축부재 및 놀이기구의 안전부재 등으로 폭넓게 활용할 것을 목적으로 코르크보드의 중층에 금속, 유리섬유, 탄소섬유를 삽입하여 보강한 3종의 코르크복합보드를 제조하였고, 코르크복합보드의 수분흡수에 따른 치수안정성 및 접착층 박리성능을 조사하였다. 코르크복합보드의 흡수율은 0.37% - 0.45%의 범위에 있었고, 코르크보드에 비해 0.61배 - 0.74배의 낮은 값을 나타내었다. 코르크복합보드의 두께팽창률은 0.92% - 1.58%의 범위에 있었고, 코르크보드 보다 1.4 - 2.4배의 높은 값을 나타내었다. 그러나 이 값들은 일반 목질보드보다 현저히 낮았고, KS규격의 12%이하를 하회하는 것이 확인되었다. 코르크복합보드의 준내수 및 내수침지박리시험후의 접착층박리율은 0%로 전혀 접착층의 박리가 일어나지 않아 우수한 내수성을 나타내었고, 흡수율과 흡수두께팽창률은 상온침지에 비해 다소 증가하였으나, 목질보드에 관한 KS규격을 하회하는 우수한 치수안정성을 나타내는 것이 확인되었다.

The antifungal activity of cork tree extract against three plant pathogenic fungi (Colletrotrichum gloeosporiodes (Penz.) Penz. & Sacc., Pythium ultimum Trow. and Botrytis cinerea Pers.) was investigated antifungal active substances were identified. Cork tree extract showed concentration-dependent antifungal activity against three plant pathogenic fungi. The cork extract had antifungal activity in a concentration-dependent manner, and in particular, showed the most vigorous antifungal activity against Botrytis cinerea. In cork tree extract, the incidence of strawberry powdery mildew fungus after 7 days of treatment was significantly lower as the treatment concentration increased. Control value against strawberry powdery mildew fungus was 49% of cork tree extract, 69% of berberine chloride, and 67% of berberine bromine, which was lower than 80.5% of Rifzol, a representative antifungal compound, but showed strong antifungal activity. The isolated compound and berberine derivative showed similar effects to Rifzol at the treatment concentration (75 μg/ml), and a concentration of at least 10 μg/ml of fresh weight showed a preventive effect against strawberry powdery mildew fungus. Fractions showing antifungal activity were obtained by TLC, and each fraction was examined for the antifungal activity to obtain fractions showing antifungal activity against three types of pathogenic fungi. The compound isolated through TLC analysis was analyzed by HPLC equipped with an ODS column to obtain the main peak presumed to be berberine, which was confirmed as a berberine through 1H NMR analysis. The results of this study are expected to be utilized as biological pesticides with strong antifungal activity against plant powdery mildew etc.

In the aerospace field, Carbon/Cork composites have been used for rocket propulsion systems as a light weight structural component with a high bending stiffness and high thermal insulation properties. For the fabrication of a carbon composite with a heat insulation cork part, the bonding properties between them are very important to determine the service life of the Carbon/Cork composite structure. In this study, the changes in the interfacial adhesion and mechanical properties of Carbon/Cork composites under accelerated aging conditions were investigated. The accelerated aging experiments were performed with different temperatures and humidity conditions. The properties of the aged Carbon/Cork composites were evaluated mainly with the interfacial strength. Finally, the lifetime prediction of the Carbon/Cork composites was performed with the long-term property data under accelerated conditions.

소나무 및 굴참나무 임분의 지하부 탄소저장량과 영급 및 지역 간의 관계를 구명하고자 경남 서부 7개 지역(고성군, 하동군, 진주시, 산청군, 의령균, 하동군, 사천시)을 대상으로 각 영급별(Ⅲ: 평균 30년생;Ⅴ: 평균 50년생; Ⅶ: 평균 70년생)로 20 m × 20 m 크기의 조사구 18개소를 선정하였다. 선정된 조사구를 대상으로 2010년 10월 낙엽층 및 토양 0-50 cm 깊이의 탄소함량 및 저장량을 조사하였다. 토양 탄소저장량은 두 수종 모두 Ⅶ영급이 가장 높았으나 영급 간 유의적인 차이는 없으며, 낙엽층 탄소농도와 탄소저장량도 두 수종 모두 영급 간 유의적인 차이가 나타나지 않았다(P>0.05). 지역별 토양 탄소저장량은 소나무 임분의 경우 진주시가 18.13 Mg C/ha로 가장 낮았고, 하동군이 143.72 Mg C/ha로 가장 높았으며, 굴참나무 임분은 의령군이 21.92 Mg C/ha로 가장 낮았으나, 사천시는 119.9 Mg C/ha로 가장 높아 지역 간 유의적인 차이가 있었다. 낙엽층 탄소저장량의 경우도 소나무 임분의 경우 의령군이 가장 낮았고 산청군이 가장 높았으며, 굴참나무 임분은 사천시가 가장 낮았고, 고성군이 가장 높아 지역 간 유의적인 차이가 있었다. 본 연구결과에 따르면 경남 서부지역 소나무와 굴참나무 임분의 지하부 탄소저장량은 영급보다는 지역 간의 차가 크게 기여하는 것으로 나타났다.

The cork have been preferred over the conventional materials, zeolite, ceramics, and lignite as a biofilter medium. During the 6 months of operation, the performance of the cork biofilter was considered good with 150ppm of mixture BTX vapor efficiencies greater than 90% at 60 second of EBCT. It was observed 56 % of removal efficiency under tranisition conditions at first stage, and then the removal efficiency was increased to above 90 %, and the sustainability of removal efficiency was maintained. At second stage, the performance of cork biofilter was not decreased 90 % efficiency with 150 ppm BTX at 30 sec. EBCT. The production of CO2 due to microbial respiration was increased to the 40 % on the operation of cork biofilter