• 제목/요약/키워드: Degumming loss

검색결과 17건 처리시간 0.022초

견의 정련 방법에 관한 연구(2) - Pad-steam 정련 - (A Study on the Silk Degumming(2) - Pad-steam Degumming -)

  • 김문식
    • 한국염색가공학회지
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    • 제18권6호
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    • pp.25-30
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    • 2006
  • Degumming is an essential process to improve the luster and smoothness of the silk filament. Silk varieties were degummed using different methods. A number of methods, from pad-steam to specific alkaline are being used for this propose. In this paper an attempt to compare the efficiencies of different degumming processes has been made. from the results, it may be observed that when silk fabrics were pad-steam, the degree of degumming, as assessed by weight loss. When the pad-steam degumming was carried out at different pHs, adjusted using alkalies, it was observed that at higher pH the weight loss is high. Pad-steam degumming as well as star degumming was found to be superior with minimum damage to the substrate. Among the alkalis used, the sodium carbonate gives the best results, since the weight loss is almost maximum with lower strength loss by over degumming. It is also efficient from the point of view of conservation of heat energy and time as against the comparable star degumming.

Silk/Polyester 혼섬유 재료의 감량가공에 관한 연구 II. Spun silk/Polyester 혼섬유의 감량가공 (The Study on the Weight loss Finishing for the mixture Silk/Polyester II. The Weight loss Finishing for the Spun silk/Polyester)

  • 배도규
    • 한국잠사곤충학회지
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    • 제36권1호
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    • pp.53-57
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    • 1994
  • 견방사와 PET로 구성된 혼섬유 재료에 대해 여러가지 조건에서 알칼리 감량을 실시하여 감량율을 조사하고, 감량촉진제가 정련, 감량에 미치는 영향에 대해 검토한 결과를 요약하면 다음과 같다. 1) 감량촉진제와 농도 증가에 따라 견방사의 감량은 감소하여 강알칼리욕에서도 적당한 정도의 감량율을 얻을 수 있었다. 2) PET "A", "B"와 견방사로 된 혼섬유의 감량에서 견방사는 피브로인의 손상이 없는 정도의 적당한 감량이 얻어졌고, PET의 감량도 동시에 이루어 질 수 있었다. 3) PET "D", "E"와 견방사로 된 혼섬유의 감량에서, 견방사는 적당한 감량이 이루어 질 수 있었으나 PET의 감량율은 미미하였다. 4) 견방사와 PET로 된 교직물의 감량에 있어서, 견방사 분분은 전형적인 연감곡선 형태를 나타내 감량평형을 보였으나 PET는 처리시간의 경과에 따라 감량율이 계속해서 증가하였다. 보였으나 PET는 처리시간의 경과에 따라 감량율이 계속해서 증가하였다.

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Silk/Polyester 혼섬유 재료의 감량가공에 관한 연구 I. Raw-silk/Polyester 혼섬유의 감량가공 (The Study on the Weight loss Finishing for the Mixture of Silk/Polyester I. The Weight loss Finishing for the Raw-silk/Polyester)

  • 배도규
    • 한국잠사곤충학회지
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    • 제35권2호
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    • pp.114-119
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    • 1993
  • 생사와 PET로 구성된 혼섬유 재료에 대해 여러가지 조건에서 알칼리 감량을 실시하여 감량율을 조사하고, 감량촉진제가 정련, 감량에 미치는 영향에 대해 검토한 결과를 요약하면 다음과 같다. 1. 감량촉진제의 농도 증가에 따라 생사의 연감율은 감소한 반면, PET의 감량율은 증가하였다. 2. 알칼리농도 증가에 따른 감량율의 경향 차이는 인정되지 않았지만, PET의 감량율은 증가되었다. 3. PET "A", "B"와 생사로 된 혼섬유의 감량에서는, 적당한 생사의 정련과 PET의 감량이 동시에 이루어질 수 있었다. 4. PET "D", "E"와 생사로 된 혼섬유의 감량에서는, 생사는 적당한 정련이 이루어질 수 있었으나 PET의 감량율은 미미하였다. 5. 생사와 PET로 된 교직물의 감량에 있어서 생사는 전형적인 연감곡선 형태를 나타냈으며 PET는 처리시간의 경과에 따라 감량율이 계속해서 증가하였다.나타냈으며 PET는 처리시간의 경과에 따라 감량율이 계속해서 증가하였다.

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Cocoon Characteristics of Antheraea pernyi Silkworm Reared in Korean Oak Field

  • Shin, Bong-Seob;Jeon, Jong-Young;Kim, Jong-Ho
    • International Journal of Industrial Entomology and Biomaterials
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    • 제25권2호
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    • pp.205-208
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    • 2012
  • Antheraea pernyi silkworm is a well known wild silkworm to produce a valuable silk fiber. A. pernyi silkworm was reared in Korean oak field and examined the cocoon characteristics, such as cocoon weight, cocoon shell weight, and percentage of cocoon shell weight. Degumming loss was also measured after alkali degumming process. A. pernyi silkworm spins tawny color cocoon in oval shape. Cocoon shell weight of A. pernyi silkworm, 0.78 g, was heavier than that of B. mori silkworm, 0.51 to 0.63 g. Cocoon shell percentage of A. pernyi silkworm, 32.8%, was higher than that of B. mori silkworm, 23.4 to 25.2%. Degumming loss percentage of A. pernyi silkworm, 17.1%, was lower than that of B. mori silkworm, 25.0%. SEM showed that the surface of the cocoon filament was coarse and oriented with longitudinal direction.

DEGUMMING OF SILK FABRIC WITH AN ENZYME DEGUMMASE

  • Chopra, Sheetal;Garg, Samir;Gulrajani, M.L.
    • 한국잠사곤충학회지
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    • 제36권1호
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    • pp.44-52
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    • 1994
  • 산소정련으로 기준 정련방법이 대체될 수 있다. 마르세일비누(25% o.w.f)로 1.5시간 동안 자등하는 기존 방법으로 정련하는 경우 연감율이 24% 내외인데 비해 효소(10% o.w.f)로 5$0^{\circ}C$에서 1시간 정련하면 22%의 연감율을 얻었다. 산소정련은 기존 방법에 비해 처리온도를 현저히 낮출 수 있고 처리시간을 단축할 수 있으며 이러한 방법으로 실크의 광택과 부드러운 촉감을 얻을 수 있었다. 산소의 처리량을 절감하기 위한 Pad-store 방법이 규명되었는데 이 방법에서 효소처리 농도를 0.5%로 낮추고 5$0^{\circ}C$에 5~6시간 정련하면 연감율이 22%로 되었다. Pad-store 방법은 위의 용액처리 방법에 비하여 효소처리량을 20배 절감할 수 있었지만 처리견의 강력이 감소되므로서 5$0^{\circ}C$에서 7~8시간 처리로 정련견의 취화가 일어난것으로 보인다. Pad-store 방법에서 견의 강력이 감소된 것은 정련과정중 효소가 작용하는 부위에서 교반작용이 없기 때문이며 실크의 취화는 시간보다 온도의 영향이 큰 것으로 생각된다.

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Effect of degumming conditions on the fluorescence intensity of fluorescent silk cocoons: A combined experimental and molecular dynamics study

  • Chan Yeong, Yu;Ezekiel Edward, Nettey-Oppong;Elijah, Effah;Su Min, Han;Seong-Wan, Kim;Seung Ho, Choi
    • International Journal of Industrial Entomology and Biomaterials
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    • 제45권2호
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    • pp.56-69
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    • 2022
  • Silk is a unique natural biopolymer with outstanding biocompatibility, high mechanical strength, and superior optical transparency. Due to its excellent properties, silk has been widely reported as an ideal biomaterial for several biomedical applications. Recently, fluorescent silk protein, a variant of native silk, has been reported as a biophotonic material with the potential for bioimaging and biosensing. Despite the realization of fluorescent silk, the traditional degumming process of fluorescence silk is crude and often results in fluorescence loss. The loss of fluorescent properties is attributed to the sensitivity of silk fibroin to temperature and solvent concentration during degumming. However, there is no comprehensive information on the influence of these processing parameters on fluorescence evolution and decay during fluorescent silk processing. Therefore, we conducted a spectroscopic study on fluorescence decay as a function of temperature, concentration, and duration for fluorescent silk cocoon degumming. Sodium carbonate solution was tested for degumming the fluorescent silk cocoons with different concentrations and temperatures; also, sodium carbonate solution is combined with Alcalase enzyme and triton x-100 to find optimal degumming conditions. Additionally, we conducted a molecular dynamics study to investigate the fundamental effect of temperature on the stability of the fluorescent protein. We observed degumming temperature as the prime source of fluorescent intensity reduction. From the MD study, fluorescence degradation originated from the thermal agitation of fluorescent protein Cα atoms and fluctuations of amino acid residues located in the chromophore region. Overall, degumming fluorescent silk with sodium carbonate and Alcalase enzyme solution at 25 ℃ preserved fluorescence.

Degumming Characteristics and Color Stability of GoldenSilk Cocoon

  • Kweon, Hae-Yong;Lee, Kwang-Gill;Park, Kwang-Young;Kang, Seok-Woo;Seok, Young-Seek
    • International Journal of Industrial Entomology and Biomaterials
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    • 제24권1호
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    • pp.1-5
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    • 2012
  • A newly developed silkworm variety, GoldenSilk makes bright yellow cocoon. In this article, the basic characteristics of GoldenSilk cocoon were examined through color analysis, degumming characteristics and UV spectrophotometer. The colorant of GoldenSilk cocoon was not distributed evenly throughout the cocoon layer but existed in the outer layer of the cocoon. The colorant has not good resistance against sunlight. The degumming loss percentage of GoldenSilk cocoon was 29.2%, which is relatively higher than that of the authorized one. UV spectrophotometer showed specific absorption band around 400 to 500 nm, which is the specific yellow colorant of the GoldenSilk cocoon extracted to the degumming solution during the degumming process.

정련 및 세리신 정착처리 견직물의 물리적 성질과 염색성 (The Physical Properties and Dyeability of the Degummed and Sericin Fixed Silk Fabrics)

  • 이은미;이혜자;유혜자
    • 한국의류학회지
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    • 제27권5호
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    • pp.517-523
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    • 2003
  • We studied the physical properties of silk fabrics after degumming, the dyeability and the color fastness of silk fabrics after degumming and sericin fixing. As the sericin was removed from silk fabrics, the rate of weight loss increased and both the abrasion resistance and the drape coefficient decreased. This means that the amount of the sericin remained in silk fabrics significantly affects the physical properties of silk fabrics. On the surface and the cross-section of silk fabrics, the silk fibers enclosed by the sericin seemed to be in a lump shape. Each fibroin strand, however, got scattered, as the process of degumming went through. The dyeability of silk fabrics degummed decreased at between 20$^{\circ}C$∼80$^{\circ}C$ the dyeing temperature, on the other hand, it significantly increased over 80$^{\circ}C$. The dyeability of the sericin-fixed silk fabrics was lower than that of the non-serin-fixed silk fabrics, to a little extent. The colorfastness of crocking in the dyed-silk fabrics was a little low and that of the sweat was much lower in a basic sweat. Especially, the colorfastness of the partially degummed silk fabrics was low, because the sericin was not stable in the condition of sweat. Therefore, the process of sericin fixing is essentially required, for the partially degummed silk fabrics and the process of degumming itself.

Degumming of Antheraea yamamai silkworm cocoon

  • Shin, Bong-Seob;Jeon, Jong-Young;Kim, Jong-Ho
    • International Journal of Industrial Entomology and Biomaterials
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    • 제31권2호
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    • pp.127-131
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    • 2015
  • Oak silkworm, Antheraea yamamai (A. yamamai), has been used for clothing and surgical suture and considered as biomaterial due to RGD tripeptide. This paper reported the degumming conditions of A. yamamai using sodium oleate, high pressure and temperature, and sodium carbonate. Degumming ratio of A. yamamai cocoon using sodium oleate was less than 10%. High pressure and temperature treatment induced 30% weight loss of A. yamamai cocoon. The concentration, treatment temperature and time using sodium carbonate was examined and revealed the following conditions for degumming; 5% owf, 60 min at 100℃. The degummed solution was confirmed using UV and FT-IR spectrometer. Our results can be used to handle A. yamamai silkworm cocoon for further application including material processing.

Bacillus licheniformis 단백질 분해 효소에 의한 정련 견사의 특성 III. 견 피브로인 수용액의 거동 (Physicochemical Characteristics of Silk Fibroin Degummed by Protease in Bacillus licheniformis II. Behavior in Aqueous Solution of Silk fibroin)

  • 김영대;남중희
    • 한국잠사곤충학회지
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    • 제35권1호
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    • pp.60-68
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    • 1993
  • 견층을 자연 건조하므로써 변성을 받지 않은 시료에 대하여 Bacillus licheniformis 단백질 분해 효소 정련과 비누 정련의 특성을 비교하기 위하여 널리 사용되고 있으며 용해할 때 비교적 피브로인에 대한 degradation이 적은 두가지 용해볍으로 용해한 견 피브로인 수용액에 대하여 분자 구조상의 차이가 있는지를 구명하고져 실험한 결과는 다음과 같다. 1. 견 피브로인 수용액의 편광 현미경으로 관찰한 결과 구정은 관찰되지 않았으나 나뭇잎 모양의 피브릴 구조가 나타났고 전자 현미경으로 관찰한 결과 구정의 크기는 30~120mm 정도였으며 정련 방법과 견 피브로인을 용해하는 방법에 따른 차이는 없었다. 2. 견 피브로인 수용액의 점도 측정 결과 비누 정련견 피브로인 수용액보다 효소 정련 견 피브로인 수용액의 intrinsic viscosity가 낮았다. 3. 견 피브로인 수용액에 대한 전기 영동 시험 결과 약 20kd에서 small submit와 50kd 이상에서 large subunit에 해당하는 폭 넓은 band가 나타났으며 정련 방법에 따른 차이는 없었다. 4. 견 피브로인 수용액을 냉동 건조한 분말에 대한 열 분해 온도는 비누 정련 견사와 효소 정련 견사간에 차이가 없었고 용해 방법에 따른 열 분해 온도는 cupric hydroxide-ethylene diamine법으로 용해하였을 때 조금 낮았다. 5. 견 피브로인 수용액을 송풍 건조한 시료에 대한 IR spectrum은 silk II형과 silk I형이 복합되어 나타났으며 정련 방법은 다른 차이가 없었다.

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