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검색결과 4건
1.
2017.05
구독 인증기관·개인회원 무료
Sulfur copolymer (poly(S-r-CEA)) was synthesized via facile inverse vulcanization of elemental sulfur with 2-carboxyethyl acrylate (CEA). Polysulfide (PS) oligomer was soluble to common solvents including DMF, producing homogenous dope solution with PAN as filler. PS-PAN was electrospun resulting to nanofiber membrane effective for Hg2+ sequestration with recorded maximum capacity of 612 mg g-1 based on Langmuir model isotherm. Kinetics, selectivity and reusability were also evaluated. This work presents new and cheap yet effective material for heavy metal sequestration from contaminated water. This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2015R1A2A1A15055407) and by the Ministry of Education (No. 2009-0093816).
2.
2016.05
구독 인증기관·개인회원 무료
Novel processable sulfur copolymer (poly(S-r-CEA)) was synthesized via facile inverse vulcanization of elemental sulfur with 2-carboxyethyl acrylate (CEA). This polysulfide was electrospun producing sulfur-rich nanofiber and tested for heavy metal sequestration. Adsorption experiments show very high and efficient Hg2+ adsorption. This work extends the novelty of inverse vulcanization chemistry by developing method for preparation of material based on inverse vulcanized polysulfide. Consequently, a new and cheap yet effective material was prepared for heavy metal sequestration from contaminated water. This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2015R1A2A1A15055407) and by the Ministry of Education (No. 2009-0093816).
3.
2012.07
KCI 등재
서비스 종료(열람 제한)
본 연구는 콘크리트 지하구조물 외부에 적용하는 방수공법으로 120일 후 가황되도록 가황제, 가황조제 등을 첨가하여 배합제조된 합성고무시트 방수재로써 약 85일의 delay time과 약 35일의 curing time을 가지며, 이때 인장강도는 약 692%가 증가하고, 신장률은 약 10% 감소하여, 일반시트의 시공시 단점을 미가황상태로 시공되어 보완하고, 상온에서 가황하여 내구성능을 확보할 수 있는 것으로 나타났다. 또한 가황직후 및 가황 1년 후의 각종 열화요인에 대한 내구성능을 평가한 결과 관련 품질기준을 만족하며, 미가황 상태에서의 합성고무 시트에 보호모르타르를 시공하여 접착성능을 평가한 결과 첨가된 실리케이트에 의하여 보호모르타르와 수화반응에 의한 양호한 부착성능이 확보되는 것으로 나타났다.
