1. Changgang Institute of Paper Science and Technology , Kangwon National University , 1 Kangwondaehak-gil , Chuncheon , Gangwon-do 24341 , Republic of Korea
2. Department of Paper Science and Engineering , College of Forest and Environmental Sciences , Kangwon National University , 1 Kangwondaehak-gil , Chuncheon , Gangwon-do 24341 , Republic of Korea