An approach to mimic nature by self-healing - a boon to achieve material durability / Trisha Kaushik in PAINTINDIA, Vol. LXXII, N° 9 (09/2022)  

[article]  inPAINTINDIA > Vol. LXXII, N° 9 (09/2022) . - p. 53-86 Titre : An approach to mimic nature by self-healing - a boon to achieve material durability Type de document : texte imprimé Auteurs : Trisha Kaushik, Auteur ; Shubhajit Paul, Auteur Année de publication : 2022 Article en page(s) : p. 53-86 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Effet mémoire de forme Electrohydrodynamique Encapsulation Enrobage (technologie) Fibres creuses Ionomères Un ionomère est un copolymère thermoplastique « réticulé ioniquement ». La réticulation améliore la cohésion du polymère et la conductivité électrique. Matériaux autoréparants Nanoparticules Particules (matières) -- Migration Polymères supramoléculaires Les polymères supramoléculaires sont des longues chaînes linéaires formées par assemblage réversible de composés de faible masse molaire. La réversibilité de l'association confère à ces matériaux des propriétés proches, mais complémentaires de celles des polymères classiques. En effet, dans les conditions d'utilisation, un polymère supra-moléculaire est en équilibre avec son monomère. Par conséquent, en modifiant légèrement les conditions expérimentales (solvant, concentration, température, cisaillement...), il est possible d'allonger ou de raccourcir les chaînes supramoléculaires et donc de changer les propriétés (rhéologiques, mécaniques...) du système. Cette particularité constitue un avantage pour de nombreuses applications potentielles, ainsi qu'une difficulté de caractérisation. Revêtements organiques Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : We have known that coatings principally are meant to deliver corrosion protection and aesthetics. A few polymeric materials used as coating go through many structural and physical changes, as cracks occur due to physical damage or environmental effect on ageing. These cracks may propagate and can potentially cause over all destruction of the coating as well as the target material itself. This has created a demand for automatic healing as a concept. This concept is mimicking the idea of natural power of self- healing observed in human skins. This process is nothing but incorporating some encapsulated healing materials which will be released in a controlled way to prevent crack propagation when a crack initiates. The encapsulation of active healing agents includes embedment of healing agent containing microcapsules or hollow fibres. There are also some reversible processes like Diels-Alder reaction, ionomers and supramolecular system which provide the self healing mechanism. In this paper, different kinds of self healing mechanism of coating like catalyst free self healing induced by sunlight, shape memory effect, electro-hydrodynamics, nano particle migration, co-deposition etc are also reviewed. Advantages as well as drawbacks have been described for those type of mechanism to achieve self healing property. Characterization and quantification techniques are also described in this review. Application of self healing coating in different sectors has been described and the acceptance of th is new generation coating by global market is also captured in this article. Note de contenu : - SELF-HEALING TECHNIQUES : Classification of self healing material - Methodologies for achieving self-healing functionality - Microcapsule embedment - Hollow fibre embedment - Microvascular system - Reversible cross links - Supramolecular polymers - Ionomers - Miscellaneous techniques - Nanoparticle migration - Co-deposition - Phase separation method - Quantification of healing - Challenges of the self healing coatings - Application of self healing coating - Global market scenario - Prospect evaluation - Table 1 : Different self healing systems via microencapsulation technique - Table 2 : Different works on hollow fibre embedment En ligne : https://drive.google.com/file/d/19nUZQrmPzBy4jgzGARVFfNhDyCSODElp/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38508 [article]

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Applications for shape-memory polymer composites in aerospace / Jinsong Leng in JEC COMPOSITES MAGAZINE, N° 72 (04-05/2012)

[article]  inJEC COMPOSITES MAGAZINE > N° 72 (04-05/2012) . - p. 56-58 Titre : Applications for shape-memory polymer composites in aerospace Type de document : texte imprimé Auteurs : Jinsong Leng, Auteur ; Liwu Liu, Auteur ; Haibao Lv, Auteur ; Yanju Liu, Auteur Année de publication : 2012 Article en page(s) : p. 56-58 Langues : Anglais (eng) Catégories : Avions -- Matériaux Composites Effet mémoire de forme Industries aérospatiales -- Matériaux Matériaux intelligents Tissés Index. décimale : 668.9 Polymères Résumé : The applications for shape-memory polymers and composites in aerospace have been widely studied since the 1980s. As shown in this paper, these promising smart materials are being particularly developed and qualified for space deployable structures, morphing structures, smart mandrels, optical reflectors, smart textiles and fabrics. Note de contenu : - Space deployable structures - Morphing structures - Smart mandrels - Other applications Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17387 [article]

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Characterisation and application of polyurethane copolymers grafted with photoluminescent dyes / Yong Chan Chung in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 305-313 Titre : Characterisation and application of polyurethane copolymers grafted with photoluminescent dyes Type de document : texte imprimé Auteurs : Yong Chan Chung, Auteur ; Kiseok Yang, Auteur ; Jae Won Choi, Auteur ; Byoung Chul Chun, Auteur Année de publication : 2014 Article en page(s) : p. 305-313 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique Caractérisation Colorants Copolymères -- Propriétés mécaniques Copolymères -- Synthèse Copolymères greffés Effet mémoire de forme Electrofilature Essais (technologie) Essais dynamiques Photoluminescence Polyuréthanes Traction (mécanique) Index. décimale : 667.9 Revêtements et enduits Résumé : Photoluminescent dyes (aminofluorene, naphthalimide, naphtholbenzein, or phenosafranine) were grafted to polyurethane using an allophanate linkage. The photoluminescence properties and the shape recovery effects of polyurethane samples were investigated. The polyurethane was composed of 4,4?-methylenebis(phenylisocyanate), poly(tetramethyleneglycol), and 1,4-butanediol. The dyes were linked through an extra 4,4?-methylenebis(phenylisocyanate) and the carbamate moiety of the polyurethane chains. Polyurethanes with various dye contents were characterised, and the shape recovery and photoluminescence properties were compared. In the case of the tensile mechanical properties, the highest maximum stress was 56 MPa, and the strain remained > 1500% for the entire series. The shape recovery improved as the test cycle was repeated, with up to 100% recovery being achieved, but shape retention decreased as the dye content increased. Finally, the photoluminescence of the polyurethanes was demonstrated by a luminescent light-emission test, together with pH indication capability and the preparation of non-woven fibre using the electrospinning method. Note de contenu : - EXPERIMENTAL : Materials - Polymer synthesis - Crosslink density - Electrospinning - Characterisation - Shape-memory test - RESULTS AND DISCUSSION : Synthesis and structure of PU - IR and thermal analysis - Crosslink density and viscosity - Tensile mechanical properties - Shape-memory effect - Luminescence of PU - Electrospinning DOI : 10.1111/cote.12097 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12097 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21783 [article]

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Design of high-performance curling mascara through utilization of smart thermoresponsive polymer / S. Chen in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 6 (12/2020)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 6 (12/2020) . - p. 557-563 Titre : Design of high-performance curling mascara through utilization of smart thermoresponsive polymer Type de document : document électronique Auteurs : S. Chen, Auteur ; S. Amin, Auteur Année de publication : 2020 Article en page(s) : p. 557-563 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques Effet mémoire de forme Emulsions -- Emploi en cosmétologie Formulation (Génie chimique) Maquillage Mascaras Oscillation dynamique Polymères thermo-réactifs Viscosité Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : In this study, methoxy poly(ethylene glycol)-b-poly(D,L-lactide), or mPEG-PLA, was used as the smart thermoresponsive polymer in our mascara formulation. The utility of mPEG-PLA in a mascara formulation was investigated by a stepwise build-up in an oil in water (O/W) emulsion. The experimental results may pave the way to a strategy of developing more cosmetic formulation with thermoresponsive shape memory polymers (SMPs). - Method : mPEG-PLA was first incorporated in a simple emulsion for rheological evaluation such as shear flow viscosity and small deformation oscillation measurements over the relevant temperature settings to mascara application. Then, wax and pigment were incorporated to complete the basic formulation as an O/W mascara and evaluated rheologically as before. Finally, the formulation was applied by a heated mascara applicator to false lashes to evaluate its curing and lifting effect. - Results : With 0.8% concentration of mPEG-PLA, the viscosity was able to increase from 0.20 Pas•s to 1.00 Pas•s. At 1.0% concentration of mPEG-PLA, the emulsion samples with mineral oil were evaluated from 55°C to 25°C for its storage modulus (G’) and were found to have a consistent shear-thinning characteristic across all temperature range. The sample containing the polymer (M-1) arrived at a markedly higher elasticity when compared against the sample without (M-0). The same result holds true for the set of samples formulated with beeswax instead of mineral oil. When the formulations were applied with a heated mascara applicator on false eyelashes, the formulation containing mPEG-PLA was found to produce a more pronounced and longer-lasting curl. - Conclusion : This preliminary rheological study of an O/W mascara containing mPEG-PLA demonstrated that thermoresponsive SMP can be added to enhance the curl and lifting effect of a mascara formulation. Note de contenu : - Dynamical rheological study - Mascara performance - Table 1 : Samples formulation M-1 DOI : https://doi.org/10.1111/ics.12639 En ligne : https://drive.google.com/file/d/1OBv1Meqi82VzcqwsowhgQFeMJAgcGxld/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35421 [article]

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Elastic meltblown nonwovens with high functionality and memory effect in CHEMICAL FIBERS INTERNATIONAL, Vol. 72, N° 3 (09/2022)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 72, N° 3 (09/2022) . - p. 155 Titre : Elastic meltblown nonwovens with high functionality and memory effect Type de document : texte imprimé Année de publication : 2022 Article en page(s) : p. 155 Langues : Anglais (eng) Catégories : Effet mémoire de forme Nontissés Polymères en médecine Polyuréthanes Textiles et tissus à usages médicaux Index. décimale : 677.4 Textiles artificiels Résumé : "Mass customization" is a megatrend for the future. The individualization of customer requirements, however, presents manufacturers with new challenges. Neenah Gessner GmbH, Feld-kirchen-Westerham/Germany, and Covestro AG, Leverkusen/Germany, teamed up to cooperate in product development, beginning with nonwovens with a shape memory effect. The material is manufactured using the meltblown process and is characterized by its ability to temporarily store a structural change until it returns to its original, memorized form by means of a temperature increase. Note de contenu : - Fig. 1 : Cyclic thermomechanical examination - Fig. 2 : Electron micrograph of the shape memory nonwoven - Fig. 3 & 4 : Nonwoven bandage in temporary form and bandag in permanent form En ligne : https://drive.google.com/file/d/1HO6i2wtEYG1I8sYydqnfuF6qFvYX_7zL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38171 [article]

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Getting back into shape / Olaf Fleck in EUROPEAN COATINGS JOURNAL (ECJ), N° 4/2009 (04/2009)  

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Infrared-responsive shape memory self-healing and fluorescent damage-indication anti-corrosion coatings for aluminum alloys / Xue-qi Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 4 (07/2024)  

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Innovative compression textiles based on novel shape memory yarns / Florian Wieczorek in TECHNICAL TEXTILES, Vol. 65, N° 4 (10/2022)  

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Intelligent gels / Hiroki Nagasawa in L'ACTUALITE CHIMIQUE, N° 3 (03/2002)  

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Leveraging shape memory polymers in self-healing coatings in COATINGS TECH, Vol. 14, N° 7 (07/2017)  

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Matériaux émergents / Christian Janot / Lausanne [Suisse] : Presses polytechniques et universitaires Romandes (2001)

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La nouvelle membrane climatique in TEXTILES A USAGES TECHNIQUES (TUT), N° 58 (4e trimestre 2005)

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One-dimensional structured fillers as novel carriers for self-healing coatings : a comprehensive review / Hanhai Dong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 4 (07/2024)  

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Le polycaprolactone à mémoire de forme in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 930-931 (06-07/2016)  

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Polymères "intelligents" / Anne Pagnoux in MATERIAUX & TECHNIQUES, Vol. 97, N° 1 (2009)

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Les Polymères à mémoire de forme / Bernard Sillion in L'ACTUALITE CHIMIQUE, N° 3 (03/2002)  

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Polymères à mémoire de forme / Frédéric Roger in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 938 (04-05/2017)  

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Les produits intelligents ouvrent de multiples champs des possibles ! / Dominique Appert in PLASTILIEN, N° 122 (11/2015)

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Programmed to have a keen memory / Jürgen Hättig in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 1 (01/2013)

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Radiation processing of polymer and coatings / Saket Mulge in PAINTINDIA, Vol. LXV, N° 9 (09/2015)  

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