• Human Ecology Research
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• 제56권4호
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• pp.407-416
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• 2018

This study investigated the characteristics and changes of Jeongbang-village silk culture Jeollanam-do Province during Japanese Colonial Rule with a focus in on Gokseong-gun & Damyang-gun Jeongbang-village. The results of the study are as follows. First, after Japanese occupation, it changed from a traditional silkworm species, the Joseon Silkworms and the mulberry tree to an improved Japanese species. Japan established a silk spinning mill called Jongyeon Textile factory in Gwangju and Jeongbang Village was formed in poor rural areas. Second, the way of village management consisted of buying a large number of land for mulberry plans and creating mulberry fields as a cheap way to utilize the labor force for women and men in rural areas. Third, since the end of the Japanese colonial era, mulberry fields in Jeongbang villages which the Japanese left, were sold at a cheap price to Koreans. After the Korean War, the Korean government's efforts to modernize the silkworm industry resulted in a continuous plan to increase the number of silkworms. The impact of government policies has also increased the production of silkworms in these areas. However, since the early 1980s, Korean companies have been affected by Japanese economic policies and dumping by China that has resulted in in a sharp decline in their production. In the case of Gokseong-gun and Damyang, the production of silk products was halted and switched to other crops in the early 1990s when the farming industry began to decline.

• Composites Research
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• 제29권6호
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• pp.408-413
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• 2016

흔히 사용되는 고분자는 다양한 형태로 제조되고 있다. 더 나아가, 나일론, 아라미드와 같은 연속적인 고분자 섬유가 최근에 제조되고 있다. 이번 실험에서 에폭시를 이용하여 고분자 섬유를 제조하였다. 비스페놀-A 타입의 에폭시가 사용되었고, 아민계 및 산 무수물계 경화제가 사용되었다. 에폭시 형상을 유지하기 위해 단계적 승온방식을 이용하여 에폭시 섬유를 경화했다. 계면접착력을 확인하기 위하여 두 섬유에 대한 상대적인 표면에너지를 수정된 정적 접촉각 방식으로 확인하였다. 인장실험을 통하여 기계적인 실험을 실시하였다. 인장실험 후에 파단형태가 경화제에 따라 달라지는 것을 확인하였다. 아민계 경화제를 사용한 에폭시 섬유의 경우 인장강도가 183 MPa로 70 MPa인 산 무수물계 경화제를 사용한 에폭시를 사용한 에폭시 섬유보다 더 좋은 것을 확인하였다.