02281nas a2200241 4500008004100000022001400041245010600055210006900161260000800230300001600238490000600254520145900260653002301719653001901742653002201761653002201783653002201805653001901827100002701846700001701873700002701890856012201917 2024 eng d a2637-610500aBiobased reusable nonisocyanate polyurethane hot-melt adhesives with potential chemical degradability0 aBiobased reusable nonisocyanate polyurethane hotmelt adhesives w cSEP a11180-111920 v63 a

Hot-melt adhesives (HMAs) derived from renewable resources are always attractive, as they promote less dependence on fossil resources and aid in developing environmentally friendly materials. However, developing sustainable HMAs exhibiting good adhesive performance and biodegradability remains challenging. Herein, reusable biobased HMAs with a high bio content of 88-90%, biodegradability, and tunable adhesive nature were developed as a possible alternative to conventional petroleum-based hot-melt adhesives. Moreover, the structure-property relationship of the product was investigated in detail. By tailoring the monomer composition, NIPU-40 HMA exhibited a good bonding ability with a superior adhesion strength of 6.39 MPa. To the best of our knowledge, this is the highest adhesion strength observed when bonding with an Al substrate among the biobased thermoplastic NIPU-HMAs. Impressively, NIPU-HMAs could display excellent reusability even after three bonding and debonding cycles without a significant drop in the adhesive strength and were found to exhibit good adhesion performance under wet conditions. More importantly, the NIPU-HMAs are prone to degradation under acid-catalyzed conditions. Considering their features, these biobased NIPU thermoplastic hot-melt adhesives offer an opportunity to create environmentally friendly, degradable adhesives that possess excellent adhesive strength and can be reused multiple times.

10aacid degradability10abiobased NIPUs10acyclic carbonates10ahot meltadhesives10alap shearstrength10aspiro-aromatic1 aGhuge, Gorakh, Hiraman1 aTorris, Arun1 aNair, Kiran, Sukumaran uhttps://library.ncl.res.in/content/biobased-reusable-nonisocyanate-polyurethane-hot-melt-adhesives-potential-chemical02769nas a2200229 4500008004100000245012000041210006900161260000800230300001100238490000800249520195200257653002702209653001502236653003002251653002102281100002102302700001702323700002602340700002002366700002702386856012602413 2024 eng d00aBiodegradable and 3D printable lysine functionalized polycaprolactone scaffolds for tissue engineering applications0 aBiodegradable and 3D printable lysine functionalized polycaprola cMAY a2138160 v1593 a

Tissue engineering (TE) has sparked interest in creating scaffolds with customizable properties and functional bioactive sites. However, due to limitations in medical practices and manufacturing technologies, it is challenging to replicate complex porous frameworks with appropriate architectures and bioactivity in vitro. To address these challenges, herein, we present a green approach that involves the amino acid (L-lysine) initiated polymerization of epsilon-caprolactone (CL) to produce modified polycaprolactone (PCL) with favorable active sites for TE applications. Further, to better understand the effect of morphology and porosity on cell attachment and proliferation, scaffolds of different geometries with uniform and interconnected pores are designed and fabricated, and their properties are evaluated in comparison with commercial PCL. The scaffold morphology and complex internal micro-architecture are imaged by micro-computed tomography (micro-CT), revealing pore size in the range of similar to 300-900 mu m and porosity ranging from 30 to 70 %, while based on the geometry of scaffolds the compressive strength varied from 143 +/- 19 to 214 +/- 10 MPa. Additionally, the degradation profiles of fabricated scaffolds are found to be influenced by both the chemical nature and product design, where Lys-PCL-based scaffolds with better porosity and lower crystallinity degraded faster than commercial PCL scaffolds. According to in vitro studies, Lys-PCL scaffolds have produced an environment that is better for cell adhesion and proliferation. Moreover, the scaffold design affects the way cells interact; Lys-PCL with zigzag geometry has demonstrated superior in vitro vitality (>90 %) and proliferation in comparison to other designs. This study emphasizes the importance of enhancing bioactivity while meeting morphology and porosity requirements in the design of scaffolds for tissue engineering applications.

10aAdditive manufacturing10aAmino acid10aMicro-computed tomography10aPolycaprolactone1 aNaik, Sonali, S.1 aTorris, Arun1 aChoudhury, Namita, R.1 aDutta, Naba, K.1 aNair, Kiran, Sukumaran uhttps://library.ncl.res.in/content/biodegradable-and-3d-printable-lysine-functionalized-polycaprolactone-scaffolds-tissue02443nas a2200313 4500008004100000022001400041245012100055210006900176260000800245490000600253520146100259653000801720653001701728653000801745653001501753653000801768653001501776100001801791700002001809700003001829700001701859700002201876700001401898700002201912700002101934700002101955700002401976856012902000 2025 eng d a2366-748600aBinder-free in situ interface reconstruction of NiMoO4 nanorods over Ni(OH)2 nanosheets for efficient urea oxidation0 aBinderfree in situ interface reconstruction of NiMoO4 nanorods o cDEC0 v93 a

Replacing the energy-intensive oxygen evolution reaction (OER) with the urea oxidation reaction (UOR) in electrochemical water splitting offers simultaneous green hydrogen production and urea-rich wastewater oxidation, enhancing energy efficiency and economic viability. In this study, a non-noble metal-based binder-free NiMoO4/Ni(OH)2/NF electrocatalyst is developed, featuring NiMoO4 nanorods anchored on Ni(OH)2 nanosheets. This unique morphology facilitates a highly active in situ reconstructed interface, delivering a current density of 134 mA cm-2 at 1.40 V (vs RHE) in 1 m KOH with 0.33 m urea, significantly outperforming its individual components. The catalyst demonstrates excellent stability over 50 h at 30 mA cm-2. When integrated into an anion exchange membrane urea electrolyser (13 cm2 area) with Pt@C/NF as the HER cathode, the system achieves 192 mA cm-2 at 1.60 V. The post-UOR studies confirm the presence of an amorphous NiMoO4-crystalline Ni(OH)2 interface, which plays a key role in enhancing the availability of the active sites to enhance the UOR performance. The improved electrochemical performance of the engineered catalyst can be ascribed to the in situ reconstructed amorphous-crystalline interface, optimal hydrophilicity, reduced charge transfer resistance, and the distinct morphology. This strategy offers a promising pathway for developing highly active electrocatalysts for energy conversion applications.

10aAEM10aelectrolyser10aOWS10atomography10aUOR10awastewater1 aKumar, Yogesh1 aBarik, Sidharth1 aKharabe, Geeta, Pandurang1 aTorris, Arun1 aSingh, Mayank, U.1 aMohan, S.1 aGalave, Chaitanya1 aTekawadia, Jyoti1 aKanawade, Rajesh1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/binder-free-situ-interface-reconstruction-nimoo4-nanorods-over-nioh2-nanosheets-efficient02537nas a2200265 4500008004100000022001400041245009800055210006900153260000800222490000700230520165800237653001701895653003501912653001601947653002101963100002201984700002202006700001702028700001702045700002102062700002002083700002002103700001902123856012902142 2025 eng d a0935-964800aBioinspired nanochitin-based porous constructs for light-driven whole-cell biotransformations0 aBioinspired nanochitinbased porous constructs for lightdriven wh cJUN0 v373 a

Solid-state photosynthetic cell factories (SSPCFs) are a new production concept that leverages the innate photosynthetic abilities of microbes to drive the production of valuable chemicals. It addresses practical challenges such as high energy and water demand and improper light distribution associated with suspension-based culturing; however, these systems often face significant challenges related to mass transfer. The approach focuses on overcoming these limitations by carefully engineering the microstructure of the immobilization matrix through freeze-induced assembly of nanochitin building blocks. The use of nanochitins with optimized size distribution enabled the formation of macropores with lamellar spatial organization, which significantly improves light transmittance and distribution, crucial for maximizing the efficiency of photosynthetic reactions. The biomimetic crosslinking strategy, leveraging specific interactions between polyphosphate anions and primary amine groups featured on chitin fibers, produced mechanically robust and wet-resilient cryogels that maintained their functionality under operational conditions. Various model biotransformation reactions leading to value-added chemicals are performed in chitin-based matrix. It demonstrates superior or comparable performance to existing state-of-the-art matrices and suspension-based systems. The findings suggest that chitin-based cryogel approach holds significant promise for advancing the development of solid-state photosynthetic cell factories, offering a scalable solution to improve the efficiency and productivity of light-driven biotransformation.

10abiocatalysis10alight-driven biotransformation10ananochitins10aporous materials1 aArumughan, Vishnu1 aMedipally, Hitesh1 aTorris, Arun1 aLeva, Tuukka1 aGrimm, Hanna, C.1 aTammelin, Tekla1 aKourist, Robert1 aKontturi, Eero uhttps://library.ncl.res.in/content/bioinspired-nanochitin-based-porous-constructs-light-driven-whole-cell-biotransformations