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- 주제어 : rosin-based (검색결과 4 건)
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Hao Liu,Guihua Yang,Ming He,Shaoguang Wang,Qimeng Jiang,Chenyue Yu,Jiachuan Chen 한국펄프·종이공학회 2026 펄프.종이기술 Vol.58 No.1
The non-biodegradable petroleum-based plastic packaging materials have caused pollution to the human living environment. With the implementation of global plastic ban, the research of cellulose-based paper materials as alternative to plastic for liquid packaging have become a key focus. In this work the effects of sizing treatment on the hydrophobicity and strength of cellulose-based paper materials for liquid packaging was investigated. The sizing process parameters were optimized based on the strength properties, water absorption Cobb value and hydrophobicity contact angle of the cellulose-based paper materials after sizing treatment. The results indicated that the single alkyl ketene dimer (AKD) sizing exhibited optimal hydrophobic performance compared to the single rosin sizing. The cellulose-based paper materials obtained the enhancement of hydrophobicity when the AKD dosage was 1.5 wt% (based on oven-dry pulp fiber), with a minimum Cobb value of 21.9 g/m2 and a maximum contact angle of 118.6°. For the mixed sizing of rosin/ AKD, a decrease of the mass ratio of rosin is beneficial to improve the hydrophobicity of the paper materials, and the optimal strength and hydrophobicity were achieved at mass ratio of rosin 30% : AKD 70% in the mixed sizing process, with a tensile strength of 7.62 KN/m, a bursting strength of 491.2 kPa, a tearing strength of 220 mN, a Cobb value of 20.0 g/m2 and a contact angle of 121.2°. Furthermore, the sequence of adding rosin and AKD in the mixed sizing process had no influence on the performance of the cellulose-based paper materials. It is expected that a theoretical reference for the development of high-performance cellulosebased liquid packaging materials will be provided.
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플라스마를 이용한 Abietic Acid의 제거에 관한 연구
김가영,김다슬,김동현 한국산학기술학회 2020 한국산학기술학회논문지 Vol.21 No.11
This study was measured and analyzed from January to November 2019 to confirm the effect that Abietic acid, an asthma-causing substance, which can be exposed to workers in the electronics industry, is removed by plasma treatment . The experiment was carried out using a solder wire and natural rosin . Air at temperatures of 250°C, 300°C, and 350°C was collected with a glass fiber filter paper using an air sampler for 10 minutes at a flow rate of 2ℓ/min. An analysis of the collected samples was performed by pretreatment with methyl alcohol and quantitative analysis by high performance liquid chromatography (HPLC). This procedure confirmed that abietic acid was generated in both natural rosin and solder wires, and the quantum of abietic acid increased as the treatment temperature increased. The amount of abietic acid was higher in natural rosin than solder wire. As a result of plasma treatment, a removal efficiency of about 92% or more was confirmed in natural rosin. A peak of abietic acid was not detected in the solder wire. Therefore, a removal efficiency of 100% was confirmed . This study, confirmed that abietic acid, an 본 연구는 전자산업 해당공정 작업자가 노출될 수 있는 천식유발물질인 Abietic acid가 플라스마 처리로 인해 제거되는 효과를 확인하고자 2019년 1월부터 11월 까지 측정 분석하였다. 솔더 와이어와 천연 Rosin을 사용을 사용하여 250℃, 300℃, 350℃ 온도에서 발생하는 공기를 2ℓ/min 유속으로 10분간 에어샘플러로 유리섬유여과지로 포집하였다. 포집한 시료의 분석은 메틸알코올로 전처리 후 HPLC로 Abietic acid를 정량 분석하였다. 그 결과 천연 Rosin, 솔더 와이어에서 모두 Abietic acid의 발생을 확인하였으며, 열처리 온도가 상승함에 따라 모두 Abietic acid 발생량 또한 증가함을 확인하였다. 천연 Rosin과 솔더 와이어 중에 천연 Rosin에서 Abietic acid의 발생량이 더 많았다. 플라스마 처리 결과 천연 Rosin에서 약 92% 이상의 제거효율을 확인하였고, 솔더 와이어에서는 Abietic acid의 Peak가 검출되지 않아 100%의 제거효율을 확인하였다. 본 연구를 통해 솔더 와이어와 천연 Rosin에서 천식 유발물질인 Abietic acid가 발생하는 것을 확인 하였으며, 플라스마 처리로 Abietic acid가 제거되는 효과를 확인 할 수 있었다.
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