02299nas a2200229   4500008004100000022001400041245009800055210006900153260007100222300001400293490000600307520145000313653001301763653003001776653001301806653001901819653002301838100001601861700003101877700002901908856013201937       2015                        eng d  a1944-824400aMechanically stable thermally cross linked poly(acrylic acid)/reduced graphene oxide aerogels0 aMechanically stable thermally cross linked polyacrylic acidreduc  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAR  a6220-62290 v73 a<p>Graphene oxide (GO) aerogels, high porosity (&gt;99%) low density (similar to 3-10 mg cm(-3)) porous materials with GO pore walls, are particularly attractive due to their lightweight, high surface area, and potential use in environmental remediation, superhydrophobic and superoleophilic materials, energy storage, etc. However, pure GO aerogels are generally weak and delicate which complicates their handling and potentially limits their commercial implementation. The focus of this work Vas to synthesize highly elastic, mechanically stable aerogels that are robust and easy to handle without substantially sacrificing their high porosity or low density. To overcome this challenge, a small amount of readily available and, thermally cross-linkable poly(acrylic acid) (PAA) was intermixed with GO to enhance the mechanical integrity Of the aerogel without disrupting other desirable characteristic properties. This method is a simple straightforward procedure that does not include multistep or complicated chemical reactions, and it produces aerogels with mass densities of about 4-6 mg cm(-3) and &gt;99.6% porosity-that can reversibly support up to 10 000 times their weight with full recovery of their original volume. Finally; pressure sensing capabilities were demonstrated and their oil absorption capacities were measured to be around 120 g oil per g aerogel(-1) which highlights their potential Use in practical applications.</p>10aaerogels10aenvironmental remediation10agraphene10aNanocomposites10apoly(acrylic acid)1 aHa, Heonjoo1 aShanmuganathan, Kadhiravan1 aEllison, Christopher, J.  uhttps://library.ncl.res.in/content/mechanically-stable-thermally-cross-linked-polyacrylic-acidreduced-graphene-oxide-aerogels-002398nas a2200253   4500008004100000022001400041245011600055210006900171260007100240300001600311490000600327520141800333653002301751653004101774653003501815653000901850653003401859653003401893100001701927700001601944700003101960700002901991856012402020       2016                        eng d  a1944-824400aPolyhedral oligomeric silsesquioxane-containing thiol-ene fibers with tunable thermal and mechanical properties0 aPolyhedral oligomeric silsesquioxanecontaining thiolene fibers w  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY  a11050-110590 v83 a<p>Polyhedral oligomeric silsesquioxanes (POSS) are versatile inorganic-organic hybrid building blocks that have potential applications as reinforcement nanofillers, thermal stabilizers, and catalyst supports for metal nano particles. However, fabrication of fibrous materials with high POSS content has been a challenge because of the aggregation and solubility limits of POSS units. In this paper, we describe a robust and environmentally friendly fabrication approach of inorganic-organic hybrid POSS fibers by integrating UV initiated thiol-ene polymerization and centrifugal fiber spinning. The use of monomeric liquids in this approach not only reduces the consumption of heat energy and solvent, but it also promotes homogeneous mixing of organic and inorganic components that allows integration of large amount of POSS (up to 80 wt %) into the polymer network. The POSS containing thiol-ene fibers exhibited enhanced thermomechanical properties compared to purely organic analogs as revealed by substantial increases in residual weight and a factor of 4 increase in modulus after thermal treatment at 1000 degrees C. This simple fabrication approach combined with the tunability in fiber properties afforded by tailoring monomer composition make POSS containing thiol-ene fibers attractive candidates for catalyst supports and filtration media, particularly in high-temperature and harsh environments.</p>10across-linked fiber10aenhanced thermomechanical properties10ainorganic-organic hybrid fiber10aPOSS10areactive centrifugal spinning10athiol-ene photopolymerization1 aFang, Yichen1 aHa, Heonjoo1 aShanmuganathan, Kadhiravan1 aEllison, Christopher, J.  uhttps://library.ncl.res.in/content/polyhedral-oligomeric-silsesquioxane-containing-thiol-ene-fibers-tunable-thermal-and02135nas a2200169   4500008004100000245010900041210006900150260000800219300001200227490000700239520149200246100001601738700003101754700001701785700002901802856013401831       2016                        eng d00aThermal stimuli-responsive behavior of pyrene end-functionalized PDMS through tunable P–P interactions0 aThermal stimuliresponsive behavior of pyrene endfunctionalized P  cJAN  a159-1680 v543 a<p>Pyrene end-functionalized, telechelic poly(dimethyl siloxane) (PDMS) materials were synthesized and their response to different thermal stimuli was evaluated. The incorporation of pyrene end groups introduces strong pi-pi interactions that facilitated a broad range of thermally responsive properties, in some circumstances forming pyrene nanocrystals that serve as physical crosslinks leading to elastic materials. By synthesizing different chain lengths, samples exhibiting a 7 orders of magnitude change in storage modulus in response to thermal stimuli were produced by modifying only the end-groups (0.6 wt % of all polymer segments). Repeated thermal cycling during rheological experiments revealed that pi-pi interaction and crystallization/melting kinetics of pyrene chain-ends plays a key role in their thermal responsiveness. The properties of these materials were tuned by adding free pyrene, neat PDMS, or graphene oxide (GO) nanoparticles, making them attractive for many applications (e.g., tunable damping materials, heat/light sensors, conductive gels, or light repositionable adhesives). For example, nanocomposites containing 1 wt % GO caused the melting temperature for pyrene crystal domains to more than double, and even induced pyrene end-group crystallization in samples that did not exhibit crystals in neat form. It is hypothesized that these features originate from pi-pi interactions between pyrene ends and GO surfaces. (C) 2015 Wiley Periodicals, Inc.</p>1 aHa, Heonjoo1 aShanmuganathan, Kadhiravan1 aFei, Yunping1 aEllison, Christopher, J.  uhttps://library.ncl.res.in/content/thermal-stimuli-responsive-behavior-pyrene-end-functionalized-pdms-through-tunable-p%E2%80%93p