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합성 Zeolite A 의 Detergent Builder 로써의 이용
김면섭,국명호 韓陽大學校 環境科學硏究所 1986 環境科學論文集 Vol.7 No.-
세제 builder로써의 합성 zeolite A를 하동 고령토로부터 합성하였다. 경도, 염화나트륨의 농도, linear alkyl benzene sulfonate와 합성 zeolite A와 sodium triphosphate의 비율을 달리 하는 세제 용액 중에서 non-finished cotton, resin finished cotton, polyester-cotton blend cloths를 세탁하여 세탁율과 칼슘이온농도를 측정하였다. zeolite A와 sodium triphosphate의 중량비가 1인의 경우의 실험결과는 다음과 같다. 세제의 양이 많을수록 세탁율은 증가하였으나 16˚d에서 3g/1 이상의 세제농도에서는 세탁율은 거의 증가하지 않았다. 세제농도는 경도 8˚d에서는 1.5g/1, 16˚d에서는 3g/1임을 알았으며 세탁율과 제거된 칼슘농도는 염화나트륨의 농도에는 무관하였음을 알았다. Synthetic zeolite A as a laundry derergent builder was prepared from domestic Hadong Kaolin. Non-Finished cotton, resin finished cotton and polyester-cotton blend cloths were washed in the detergent solutions which were containing various hardness, sodium chloride concentration and ratio of linear alkyl benzene sulfonate to zeolite A or to sodium triphosphate, and then cleaning performances and calcium ion concentrations were measured. The followings were the results of experiment in which the weight ratio of zeolite A to sodium triphosphate was 1. The more amount of detergent the more cleaning performance increased, but the performance was almost not inclreased with the concentration of detergent over 3g/1 at 16˚d. It was observed that the concentration of detergent was needed 1.5g/1 at hardness 8˚d and 3g/1 at hardness 16˚d. It was obtained that the cleaning performance and the calcium binding capacity were independent on the concentration of sodium chloride.
Lee,Chul,Kuk,Myung-Ho,Lee,Byoung-Oon,Jae,Won-Mok 韓陽大學校 環境科學硏究所 1986 環境科學論文集 Vol.7 No.-
플라스틱 비적 검출기에 대한 이온화율의 함수로써의 침식율을 측정하는 방법을 설명하였다. 고체상태의 비적 검출기는 폴리아마이드를 사용했다. 비적을 형성하는 중하전 이온으로써 우라늄-238의 핵분열 생성물을 이용하였다. 직각으로 입사된 입자의 경우만 비적을 측정하였다. 침식율의 변화측정과 입자확인을 위해 비적의 반경을 측정하였다. 오랜 침식기간을 거친 뒤에 문턱영역에서의 반응곡선을 결정하였다. 반응곡선은 V=1+?? 라는 관계식으로 나타내며 β는 약 2.67이었다. 이 반응곡선에 의하여 중원소를 찾는데 도움이 될 것이다. This study describes a method for measuring the variation of the etching rate as a function of the ionization rate for polyamide nuclear detector. Polyamide sheets were used as solid state nuclear track detector. The U-238 fission fragments are used as energetic heavy ions for the track formation The evolution of etched tracks is considered only for the case of normally incident particles. The track radii are measured for the determination of the differential track etch rate and for particle identification. Response curve (etching rate ratio, V versus restricted energyloss, REL) of polyamide sheet was determined in the threshold region after a long etching period. It was found that the V(REL) curve can be well described by the relation V= 1+αREL?, where power index β is 2.67. With the response curve, it may be helpful to search heavy elements.
연구논문초록(’81-’90) : 플루오르산과 황산중에서 Al - Brass 의 부식특성
한응수,김면섭,국명호 한국부식학회 1991 Corrosion Science and Technology Vol.20 No.1
The corrosion rate of Al-brass in hydrofluoric acid and sulphuric acid were measured and examined. Mutual interaction of corrosion inhibition was appeared by addition of sulphuric acid to hydrofluoric acid. The inhibition behavior was a function of concentration and temperature. Addition of 60% sulphuric acid to hydrofluoric acid appeared an effective good inhibition of Al-brass corrosion at 30℃-50℃. The corrosion activation energy of Al-brass in 47% -HF was obtained as 12.6 ㎉/㏖ and in 40% -HF + 60% H₂SO₄ was obtained as 4.6㎉/㏖ from tarrhenius plot. From the value of the apparent activation energy it was indicated that chemical reaction was rate determination step in 47% -HF and physical diffusion was rate determination step in 40% HF + 60% H₂SO₄. Addition of sulphuric acid to hydrofluoric acid decreased a sensitivity of temperature to corrosion reaction.