• Title/Summary/Keyword: Bio-adhesives

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Adhesion Properties of UV-curable Pressure Sensitive Adhesives for Dicing Tape (다이싱 테이프용 자외선 경화형 점착제의 접착 물성)

  • Do, Hyun-Sung;Kim, Sung-Eun;Kim, Hyun-Joong
    • Journal of Adhesion and Interface
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    • v.5 no.4
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    • pp.1-8
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    • 2004
  • UV-curable pressure sensitive adhesives were prepared by blending acrylic copolymer, copolymerized with butyl acrylate, acrylic acid and methyl methacrylate by solution polymerization, and trimethylolpropane triacrylate. The PSAs were evaluated by adhesion strength with varying UV dose, and also glass transition temperature ($T_g$) of PSAs were measured. When exposed on UV irradiation, the PSAs showed the decreased adhesion strength and increased $T_g$. And following UV irradiation, the PSAs did not leave any residue on wafer after peel off PSA.

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Development of Environmentally Friendly Semi-Structure Poly(Ethylene/Butylene) Rubber-based Pressure Sensitive Adhesive (친환경적인 준구조용 Poly(Ethylene/Butylene) 고무수지계 점착제의 개발)

  • Hong, Soungtaek;Park, Young-Jun;Kim, Hyun-Joong;Dilger, K.
    • Journal of Adhesion and Interface
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    • v.7 no.2
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    • pp.12-18
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    • 2006
  • Recently, as industries and technologies are increased, superior adhesives having more and more developed functions and properties have been demanded. In this article, to use the merits and viscoelastic properties of poly(ethylene/butylene) rubber resin and to supplement the demerits, semi-structure pressure sensitive adhesives (PSAs) are developed. Aslo, it can be said environmentally friendly PSAs because of not use the organic solvent and not emit volatile organic compounds (VOCs).

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Comparison Study of Thermal Decomposition Characteristics of Wattle & Pine Tannin-based Adhesives

  • Kim, Sumin;Lee, Young-kyu;Kim, Hyun-Joong;Eom, Young Geun
    • Journal of the Korean Wood Science and Technology
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    • v.30 no.3
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    • pp.34-41
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    • 2002
  • This study investigated the thermogravimetric analysis of two types of cured tannin-based adhesives from wattle and pine, with three hardeners of paraformaldehyde, hexamethylenetetramine and TN (tris(hydroxyl)nitromethan), at a temperature of 170℃ and a heating rate of 5, 10, 20 and 40℃/min for 10 minutes. The 5 minutes cured wattle tannin-based adhesive with each hardener at 170℃ was also tested to compare the degree of curing. It was found that thermogravimetric analysis could be used to measure the degree of curing of a thermosetting adhesive. The TG-DTG curves of all the adhesive systems were similar and showed three steps in a similar way to a phenolic resin. This means that each adhesive system is well cross-linked. However, a high thermal decomposition rate was shown at 150 to 400℃ in the case of the pine tannin sample with TN (tris(hydroxyl)nitromethan). The Flynn & Wall expression was used to evaluate the activation energy for thermal decomposition. As the level of conversion (𝛼) increased, the activation energy of each system increased. The activation energy of the wattle tannin-based adhesive with paraformaldehyde was higher than the others.

Pressure Sensitive Adhesives for Transdermal Drug Delivery System(TDDS) (경피흡수제제용 점착제)

  • Kim, Birm-June;Kim, Hyun-Joong
    • Journal of Adhesion and Interface
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    • v.4 no.1
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    • pp.43-50
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    • 2003
  • 점착제는 경피흡수제제(transdermal drug delivery system, TDDS)의 중요한 구성요소 중의 하나이다. TDDS용 점착제는 일반적인 점착제의 역할 외에도 부착되는 피부에 적합해야 하고, 이것에 포함되는 약물 및 첨가제들과 양립하면서 약물의 전달을 효과적으로 지속해야한다. 본 총설에서는 흔히 사용되는 TDDS용 점착제인 polyisobutylenes, polyacrylates, silicones와 최근에 개발된 제품들을 소개한다.

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Pressure Sensitive Adhesion Performances of SIS/SBS based UV-curable Pressure Sensitive Adhesives using Thiol-ene Reaction (Thiol-ene 반응을 이용한 UV경화형 SIS/SBS계 점착제의 점착물성)

  • Lim, Dong-Hyuk;Do, Hyun-Sung;Kim, Hyun-Joong;Yoon, Goan-Hee;Bang, Jung-Suk
    • Journal of Adhesion and Interface
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    • v.6 no.3
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    • pp.19-25
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    • 2005
  • Synthetic rubber based pressure-sensitive adhesives (PSAs) usually containing SIS or SBS block copolymer, tackifier, plasticizer, and other additives are now widely used on various applications. As these PSAs are physically crosslinked and can be applied without the use of solvent, they are thermally processable and environmentally friendly. However these PSAs cannot be used in high temperature applications and in applications where solvent and chemical resistance properties are required. We developed the PSA adding UV curable system, such as thiol-ene system, to increase adhesion properties at elevated temperature. The adhesion properties such as probe tack, peel strength, shear adhesion failure temperature (SAFT) were evaluated. The probe tack test was conducted with varying probe materials and coating thickness of PSAs. Using the contact angle, the surface property of the cured PSAs was also observed.

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Delayed Pulmonary Artery Rupture after Using BioGlue in Cardiac Surgery

  • Woo, Wongi;Hong, Soonchang;Kim, Tae-Hoon;Baek, Min-Young;Song, Suk-Won
    • Journal of Chest Surgery
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    • v.50 no.6
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    • pp.474-476
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    • 2017
  • A 56-year-old woman, who underwent cardiac surgery 3 months previously, presented to the emergency room with pulmonary artery rupture due to the cytotoxic effects of BioGlue (CryoLife Inc., Kennesaw, GA, USA). She was successfully treated with surgical management. Although surgical glue can be effectively used for hemostasis, it can induce delayed vascular complications. Therefore, surgical glue should be used cautiously.

Adhesion Performance and Curing Behaviors of Acid-free Acrylic PSAs Using Two Types of Curing Agents (Acid-free 아크릴계 점착제의 접착 물성 및 경화거동 연구)

  • Lee, Seung-Woo;Park, Ji-Won;Kwon, Young-Eun;Kim, Hyun-Joong
    • Journal of Adhesion and Interface
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    • v.12 no.2
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    • pp.67-72
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    • 2011
  • Acrylic pressure-sensitive adhesives are used in many different parts in the world. But acrylic acid in PSAs may occur unexpected results such as corroding adherends or producing by-products when applied within electronic devices. This study employed acrylic PSAs based on 2-ethylhexyl acrylate (2-EHA), 2-hydroxyethyl acrylate (2-HEA) and butyl acrylate (BA) with different coating thickness. There are two types of curing agents. One is methylaziridine derivative (MAZ) and the other is aluminum acetylacetonate (AlACA). This study examined the adhesion performance and curing behaviors using peel strength, probe tack and gel fraction. Also, the viscoelastic properties of acrylic PSAs were investigated from Advanced rheometric expansion system (ARES).

Value Addition Span of Silkworm Cocoon - Time for Utility Optimization

  • Reddy, R. Manohar
    • International Journal of Industrial Entomology and Biomaterials
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    • v.17 no.1
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    • pp.109-113
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    • 2008
  • Realizing the scope of utilizing by-products of silk cocoons by applying appropriate methods is the immediate crave to optimize returns. The nutritive value of pupae suits for human diet, feed for poultry, carps, fish, rabbits, piggery and dogs. The pupal skin, fat, oil, cocoon palade have applications in oleo chemical, soap, glycerin, cosmetic, artificial fibres, membranes and n-triacontanol isolation. The pupal proteins Chitin, Shinki fibroin, Serrapeptidase, glucosamine are latent precursors of post surgical, anti-carcinogenic, anti-inflammative, anti-bacterial, anti-histaminic, gastric, hepatitis, pancreatitis, leukocytopenia, neurological, ophthalmic, blood pressure, cardiac and diabetic medicines and for preparation of vitamins A, E and K. The silk and its proteins sericin and fibroin are potentially used for wound healing, diabetes, impotence, sinusitis, arthritis, edema, cystitis, epididymitis, tissue regeneration, cancer, post-surgical trauma and used as anti-oxidatives, bio-adhesives, ultra violet screens and bio-active textiles. The waste cocoons can be used in making art crafts like garlands, carpets, overcoats, decoratives and greeting cards. The in-depth research towards utility optimization and make aware this reality to sericulturists, reelers, weavers, traders, entrepreneurs, policy makers etc., is the upright want of the today's Sericulture industry.