نتایج جستجو برای: adhesive polymer

تعداد نتایج: 115330  

Journal: :iranian journal of pharmaceutical sciences 0
rahim bahri najafi isfahan university of medical sciences, faculty of pharmacy, department of pharmaceutics, zahra rezaei department of medicinal chemistry, faculty of pharmacy, and pharmaceutical sciences research center, shiraz university of medical sciences omar najm department of medicinal chemistry, faculty of pharmacy

in recent decades, most of researchers in pharmaceutical preparations have focused increasingly on new formulations that control the site and amount of drug delivery. mucoadhesive dosage forms are available for systemic or local treatment. the mucoadhesive dosage forms are introduced in various forms such as tablets, gels, ointments, patches and polymeric films. for buccal wound and injury the ...

2009
Seok Kim Metin Sitti Tao Xie Xingcheng Xiao

This work reports thin-film terminated micro-fibrillar adhesives made of adhesive polymers and shape memory polymers as reversible dry adhesives with thermally controllable adhesion. Structurally different adhesives were fabricated by coating a continuous thin layer of an elastomeric adhesive polymer onto either a flat or a fibrillar shape memory polymer surface. Experimental results exhibited ...

Journal: :journal of agricultural science and technology 2013
f. rezaei arjomand a. a. enayati a. h. lohrasebi s. r. ghaffarian anbaran s. j. hashemi

in production of tissue paper, the adhesion of a liquid adhesive creping aid, compound polymer, as creping aids on the yankee dryer surface was investigated. a compound polymer was prepared based on mixing ratio of poly (amideamine)-epichlorohydrin resin (pae) as an adhesive agent, polyvinyl alcohol (pva) as a modifier agent, and cationic fatty acid (cfa) and ethylene glycol (eg) as release age...

1994
F. Niklaus

Wafer bonding with intermediate polymer adhesives is an important fabrication technique for advanced microelectronic and microelectromechanical systems, such as three-dimensional integrated circuits, advanced packaging, and microfluidics. In adhesive wafer bonding, the polymer adhesive bears the forces involved to hold the surfaces together. The main advantages of adhesive wafer bonding include...

2003
C. Verdier J.-M. Piau

The influence of rheological and surface properties on adhesive tackiness are studied. In particular, the importance of the elongational properties is emphasized in a model, which considers only the adhesive contribution, while neglecting the importance of cavitation and surface roughness. It is shown that this simple analysis allows one to recover the different types of curves (i.e. different ...

Journal: :Journal of The Adhesion Society of Japan 2006

Journal: :Bio-medical materials and engineering 2014
Zhigang Wang Lik-Ren Tai Donald McLean Emma J Wright Gordon J Florence Stuart I Brown Pascal Andre Alfred Cuschieri

Safe and effective manipulation of soft tissue during laparoscopic procedures can be achieved by the use of mucoadhesive polymer films. A series of novel adhesive polymer films were formulated in house based on either Carbopol or Chitosan modified systems. The mechanical properties of the polymers and their adherence to bowel were evaluated using ex-vivo pig bowel immersed in 37°C water bath an...

Journal: :Chemical & pharmaceutical bulletin 1994
H Takeuchi H Yamamoto T Niwa T Hino Y Kawashima

Multilamellar liposomes consisting of dipalmitoyl phosphatidylcholine (DPPC) and dicetyl phosphate (DCP) in a molar ratio of 8:2 (DPPC:DCP = 8:2) were coated with three different types of polymers: chitosan, polyvinyl alcohol having a long alkyl chain, and poly(acrylic acid) bearing cholesterols. The existence of polymer layers on the liposome surface was confirmed by measuring the zeta potenti...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2008
Jongho Lee Ronald S Fearing

Natural gecko toes covered by nanomicro structures can repeatedly adhere to surfaces without collecting dirt. Inspired by geckos, we fabricated a high-aspect-ratio fibrillar adhesive from a stiff polymer and demonstrated self-cleaning of the adhesive during contact with a surface. In contrast to a conventional pressure-sensitive adhesive (PSA), the contaminated synthetic fibrillar adhesive reco...

Journal: :Micromachines 2016
Simon J. Bleiker Maaike M. Visser Taklo Nicolas Lietaer Andreas Vogl Thor Bakke Frank Niklaus

Device encapsulation and packaging often constitutes a substantial part of the fabrication cost of micro electro-mechanical systems (MEMS) transducers and imaging sensor devices. In this paper, we propose a simple and cost-effective wafer-level capping method that utilizes a limited number of highly standardized process steps as well as low-cost materials. The proposed capping process is based ...

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