Research was carried out on the influence of various silicone compounds on the properties of pressure-sensitive adhesives. Silicone-based pressure-sensitive adhesives have good self-adhesive properties and are used in many different industries. However, their thermal resistance is relatively low. In order to improve this property, modifications were made to these adhesives. Compositions were tested, such as viscosity or thermogravimetric analysis, as well as tests of finished products in the form of self-adhesive tapes, i.e., peel adhesion, tack, cohesion at room and elevated temperature, SAFT test (Shear Adhesive Failure Temperature), pot-live (viscosity) and shrinkage. During the tests, an increase in thermal resistance (225 °C), lower shrinkage (0.08%), and lower viscosity was achieved (16.5 Pas), which is a positive phenomenon in the technology of pressure-sensitive adhesives. Thanks to this research, the properties of silicone self-adhesive adhesives have been significantly improved.
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http://dx.doi.org/10.3390/ma15165713 | DOI Listing |
AAPS PharmSciTech
January 2025
Xiangya School of Pharmaceutical Science, Central South University, Changsha, 410006, Hunan, China.
Acrylic pressure-sensitive adhesives (PSAs) are widely applied in transdermal drug delivery systems (TDDS). However, the molecular mechanisms underlying the effect of functional groups of PSAs on drug release and transdermal permeation properties remain insufficiently clear. In this study, we investigated the effect of acrylic PSAs' functional groups on the in vitro release and transdermal permeation properties of a model drug guanfacine (GFC).
View Article and Find Full Text PDFEur J Pharm Sci
December 2024
Department of Pharmaceutical Technology, Faculty of Pharmacy, Medical University of Gdansk, Hallera av. 107, Gdansk 80-402, Poland.
Adhesiveness of dermal patches can be modified in the presence of active substances. The effect is more complex when liquid components are also present in the matrix. Commercial grade pressure sensitive adhesive (PSA) polyacrylates (three types) and silicones (two types) were used to prepare adhesive matrices and liquid additives were propylene glycol, polyoxyethylene glycol, isopropyl myristate, triacetin, triethyl citrate or low viscosity silicone oil.
View Article and Find Full Text PDFChemSusChem
December 2024
Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada.
The ring-opening polymerization of bio-based monomer 2-methylene-1,3-dioxepane (MDO) can reportedly enhance polymer degradability. Butyl acrylate (BA)/MDO/vinyl acetate (VAc) terpolymers were synthesized via emulsion polymerization for their eventual application as pressure-sensitive adhesives (PSAs). While using MDO in emulsion polymerization leads to a more sustainable process, it also presents challenges such as MDO hydrolysis, MDO ring retention, and inadequate MDO distribution.
View Article and Find Full Text PDFBiomicrofluidics
December 2024
Department of Chemical Engineering, Indian Institute of Technology, Jammu 181221, India.
Accurate detection of pathogenic nucleic acids is crucial for early diagnosis, effective treatment, and containment of infectious diseases. It facilitates the timely identification of pathogens, aids in monitoring disease outbreaks, and helps prevent the spread of infections within healthcare settings and communities. We developed a multi-layered, paper-based microfluidic and miniaturized electrophoresis system for rapid nucleic acid extraction, separation, amplification, and detection, designed for resource-limited settings.
View Article and Find Full Text PDFPolymers (Basel)
November 2024
MOE Key Laboratory of High Performance Polymer Materials and Technology, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
The development of sustainable pressure-sensitive adhesives (PSAs) from natural biomass resources has attracted increasing attention owing to their non-toxic, biocompatible, and biodegradable features. In this study, a bio-based acrylic PSA with tunable adhesion and cohesion was synthesized by a selective chemical modification of isosorbide-5-acrylate (IA) and its copolymerization with butyl acrylate and acrylic acid through UV-curing crosslinking. During the UV-curing process, the synthesized isosorbide diacrylate ester (IDAE) served as the crosslinker, effectively improving the crosslinking degree of PSA.
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