본 논문에서는 SBS-g-POEM 블록-그래프트 공중합체, 이온성 액체(EMIMTFSI) 및 ZIF-8 나노 입자를 사용하여 CO2/N2 기체를 분리하기 위한 혼합 매질 분리막(MMMs)을 개발하였다. SBS-g-POEM은 낮은 비용이 드는 자유 라디칼 중합 법을 통해 합성된 유연한 블록-그래프트 공중합체이다. EMIMTFSI는 SBS-g-POEM 매트릭스에 용해시켰으며, 합성된 ZIF-8 나노 입자들 역시 공중합체의 매트릭스에 분산시켰다. 제조된 시료들의 특성은 푸리에 변환 적외 분광법(FT-IR), 시차 주사 열량계(DSC), 주사 전자 현미경(SEM), X선 회절 분석(XRD)을 통해 확인하였으며, 분석 결과 각 성분들은 서로 간의 좋은 혼화성을 나타내었다. 기체 분리 성능은 time-lag measurements를 통해 확인되었으며, 537.0 barrer의 CO2 투과도와 15.2의 CO2/N2 선택도를 나타내었다. 이를 통해 첨가된 EMIMTFSI와 ZIF-8 나노 입자는 CO2/N2 선택도를 크게 희생시키지 않고 기체 투과 도를 두 배 이상 향상시키는 것으로 확인되었다.

The English language does not possess a 3rd person singular epicene pronoun normally used in a sex-indefinite or gender-neutral context, so the masculine 3rd person singular “he” has taken the role for over centuries. However, many researchers have indicated that generic he is not exclusively sex-neutral in that it evokes masculine imagery. For this reason, in English speaking countries, singular they has successfully evolved as an alternative to generic he. Nevertheless, in the Korean EFL setting, where the importance of English education has been emphasized, the actual use and perception of the English epicene pronoun has rarely been considered. In this context, this study investigated Korean EFL learners’ use and perception of the 3rd person epicene pronoun in sex-neutral contexts. The research observed that generic he was the learners’ most preferred choice of pronoun though it indeed evoked masculine images, whereas singular they was neither widely accepted, nor often used. The present study also determined to what extent the use and perception of epicene pronouns were related to and affected by linguistic and biographical variables. It was also demonstrated that simplicity in epicene pronoun use could have assumed priority over nonsexist expression among some Korean EFL learners. The present study has implications in that it contributes to epicene pronoun education in Korean EFL settings, and to build awareness in Korean EFL learners regarding the issue of sex bias in language.