The invention is directed to a functional sheet, to a method for preparing said sheet, to a packaging material and to the use of said packaging material. The functional sheet of the invention comprises a porous polymeric carrier having a porosity of at least 60%, preferably at least 80%, more preferably at least 90%, wherein said polymeric carrier comprises one or more functional compounds, which functional compound provides said sheet with at least one function selected from sensing, scavenging and releasing and wherein the polymeric carrier comprises one or more polyolefins and the average pore size of the polymeric carrier is at least 0.11 μm.
OPTICAL GAS AND/OR PARTICULATE SENSORS
申请人:Tkachuk Michael
公开号:US20120057161A1
公开(公告)日:2012-03-08
A gas or particulate sensor is provided for the detection of at least two target gases and/or particulates. The sensor comprises: a chamber for containing a gas sample under test; a first optical measurement channel configured for the detection of a first target gas or particulate within the gas sample, and a second optical measurement channel configured for the detection of a second target gas or particulate within the gas sample, each optical measurement channel comprising a respective optopair which comprises a radiation source adapted to emit radiation and a radiation detector adapted to output a signal in response to detected radiation; and focusing optics able to form an image of an object. At least the first optical measurement channel is configured such that the radiation detector of the respective optopair receives via the focusing optics an image of the corresponding radiation source, whereby the radiation received from the radiation source by the radiation detector is modified by the first target gas or particulate present in the gas sample such that the output signal from the radiation detector provides information as to the presence of the first target gas or particulate in the gas sample.
[EN] GAS SENSOR<br/>[FR] CAPTEUR DE GAZ
申请人:DSM IP ASSETS BV
公开号:WO2008095960A1
公开(公告)日:2008-08-14
[EN] The invention relates to a gas sensor comprising at least one sensing material embedded in a substrate wherein the sensing material is a fluorescent material and the substrate is made out of a polymeric material that is suitable for film melt processing and has high gas permeability. The invention also relates to a process to prepare such a gas sensor, a packaging material comprising such a gas sensor and the use of such a packaging material. The invention also relates to a non-invasive method to determine the quality of a packaged product by the use of a gas sensor. [FR] L'invention concerne un capteur de gaz qui comprend au moins un matériau de détection noyé dans un substrat, le matériau de détection étant une matière fluorescente et le substrat étant fabriqué dans une matière polymérique adaptée au traitement de fusion de films et possédant une perméabilité élevée aux gaz. L'invention se rapporte également à un procédé de préparation du capteur de gaz précité, à un matériau d'emballage comprenant ledit capteur de gaz et à l'utilisation du matériau d'emballage. L'invention porte aussi sur un procédé non invasif permettant de déterminer la qualité d'un produit emballé à l'aide d'un capteur de gaz.
How side-chain substituents and substrates influence mechanochromic luminescence: case study with pyrene
Many organic molecules exhibit reversible, force-induced emission change known as mechanochromic luminescence (ML) and can potentially be used as mechanosensors.