02603nas a2200229 4500008004100000022001400041245017500055210006900230260000900299300001100308490000800319520175500327653001602082653001602098653002802114653001802142653001702160100002302177700002802200700001702228856012802245 2023 eng d a0032-386100aDesign and synthesis of photocrosslinker and light blocker based on L-Amino acid polyester and their application in solvent-free resin formulation for DLP/SLA 3D printing0 aDesign and synthesis of photocrosslinker and light blocker based cMAR  a1257810 v2703 a

Customising material design for new technological applications like additive manufacturing (AM) is a challenging yet promising approach to create a palette of materials suitable for developing eco-friendly products. LGlutamic acid and L-aspartic acid based aliphatic, photocurable polyester crosslinkers were designed and developed and incorporated into a solvent-free photocurable resin formulation with hydroxyl (ethyl)methacrylate (HEMA). Proof-of-concept 3D printing of clear and transparent objects was demonstrated using digital light processing (DLP) and Stereolithography (SLA) techniques. Resolution of the 3D printed objects could be improved by incorporating a Dansyl labelled L-glutamic acid polyester, which not only aided in modulating the viscosity of the resin formulation but could also function as a light blocker, thereby avoiding polymerization of unwanted areas while 3D printing. The curing kinetics of the photocurable formulation was analyzed using photo differential Scanning Calorimetry. Enzymatic degradability studies of 3D printed films were undertaken in PBS buffer containing esterase enzyme and compared with 3D printed samples using HEMA and a commercial crosslinker (Trimethylolpropane triacrylate (TMPTA)). Scanning electron microscopy (SEM) was used to evaluate the morphology of the 3D printed films before and after enzymatic degradation in the PBS buffer for 60 days. The 3D printed amino acid crosslinked films of HEMA presented high degree of degradation in contrast to the near total absence of any degradation in the 3D printed film crosslinked using TMPTA. The availability of new photocurable formulations that are enzymatically degradable are highly sought after for 3D printing applications.

10a3D printing10aCrosslinker10aL -Amino acid Polyester10aLight blocker10aPhotocurable1 aKamble, Ganesh, N.1 aJoshi, Dheeraj, Chandra1 aAsha, S., K. uhttps://library.ncl.res.in/content/design-and-synthesis-photocrosslinker-and-light-blocker-based-l-amino-acid-polyester-and01999nas a2200229 4500008004100000022001400041245013200055210006900187260000800256490000700264520117100271653001601442653001501458653002701473653002601500653002201526100002301548700002801571700002701599700001701626856012601643 2025 eng d a1861-472800aCarbohydrate-based polyester and amino acid polyester photocrosslinker and their resin formulation for 3D printing applications0 aCarbohydratebased polyester and amino acid polyester photocrossl cJUN0 v203 a

Fully bio-based polyester was designed and synthesized using the carbohydrate-based diol 2,4:3,5-di-O-methylene-D-mannitol (Manx) and dimethyl ester of 2,3:4,5-di-O-methylene-galactaric acid (Galx). Photocurable resin formulations were prepared by incorporating up to 15 wt% of the carbohydrate polyester into hydroxyl ethyl methacrylate (HEMA) along with polyacrylamide crosslinker derived from L-glutamic acid. Complex 3D structures with good shape fidelity could be 3D printed using these novel polyester resin formulations. The incorporation of the carbohydrate polyester improved the glass transition temperature of the 3D-printed objects. Enzymatic erosion studies conducted using esterase enzyme revealed a higher degradation rate for the 3D-printed films containing the carbohydrate polyester. The hydrolytic degradation analysis conducted in both acidic and basic environments revealed that the 3D-printed polymer network exhibits stability and resilience in acidic conditions, while it undergoes complete degradation in basic conditions. This finding underscores the possibility of tailoring degradation processes under regulated circumstances.

10a3D printing10aAmino acid10aCarbohydrate polyester10aEnzymatic degradation10aResin formulation1 aKamble, Ganesh, N.1 aJoshi, Dheeraj, Chandra1 aGavhane, Utreshwar, A.1 aAsha, S., K. uhttps://library.ncl.res.in/content/carbohydrate-based-polyester-and-amino-acid-polyester-photocrosslinker-and-their-resin02608nas a2200253 4500008004100000022001400041245011100055210006900166260000800235300001600243490000600259520173400265653001601999653002102015653001802036653001702054653002802071100002402099700002302123700002202146700002902168700002702197856013002224 2025 eng d a2637-610500aTriple G-C-T base-coded nucleobase self-assembling monomers featuring polymerizable groups for 3D printing0 aTriple GCT basecoded nucleobase selfassembling monomers featurin cNOV a15619-156280 v73 a

Self-assembling monomers (SAMs) offer a versatile strategy for enhancing the performance of photoresins in Digital Light Processing (DLP) 3D printing. In this work, we report the design and synthesis of two photoprintable, nucleobase-inspired SAMs featuring a triple G-C-T base-coded hydrogen-bonding motif. This SAM was formulated using 2-hydroxyethyl acrylate (2-HEA), 1,6-hexanediol diacrylate (HDDA), and diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO) to prepare UV-curable resins suitable for high-resolution DLP printing. Remarkably, the printed samples exhibited supramolecular self-assembly, facilitated by dynamic hydrogen bonding, demonstrating a notable enhancement in thermal and mechanical performance when compared to the control sample. Thermal properties evaluated by a differential scanning calorimeter revealed an increase in the glass transition temperature (T-g) from 15 degrees C to 54 degrees C for SAM-incorporated printed materials. Mechanical testing demonstrated a >200% increase in toughness and >150% improvement in tensile strength relative to the unmodified resin while maintaining or exceeding the original elongation at break (up to similar to 74%). Variable-temperature FTIR spectroscopy confirmed the presence of thermally responsive supramolecular interactions. Notably, self-healing behavior was observed in both GCT-A 15 wt % and GCT-S 15 wt % formulations, indicating partial recovery of mechanical integrity under mild thermal conditions due to reversible hydrogen bonding. These findings demonstrate the potential of SAMs as functional additives for developing robust, thermally stable, and self-healing DLP-printed materials for advanced engineering applications.

10a3D printing10ahydrogen bonding10aSelf-assembly10aSelf-healing10aTriple G-C-T nucleobase1 aGawande, Akshay, J.1 aKamble, Ganesh, N.1 aSingh, Dharmendra1 aSanjayan, Gangadhar., J.1 aNair, Kiran, Sukumaran uhttps://library.ncl.res.in/content/triple-g-c-t-base-coded-nucleobase-self-assembling-monomers-featuring-polymerizable-groups02231nas a2200229 4500008004100000022001400041245010100055210006900156260000900225300001200234490000600246520145100252653001601703653002501719653003101744653001901775653001301794100002301807700002201830700001701852856013201869 2026 eng d a2637-610500aRecyclable l-glutamic acid-based polyester schiff base cross-linker for 3D printing applications0 aRecyclable lglutamic acidbased polyester schiff base crosslinker cJAN  a641-6500 v83 a

An l-amino acid-based polyester Schiff base cross-linker was developed from amine-functionalized polyester and biobased methacrylate vanillin. Vanillin, one of the few biobased and aromatic compounds readily available on an industrial scale, has recently garnered significant attention from the polymer community. The l-amino acid-based polyester Schiff base cross-linker (P3) was synthesized by condensing the aldehyde group of methacrylate vanillin with the amine group of the l-glutamic acid polyester. This polymeric cross-linker was used in resin formulations consisting of isobornyl acrylate as a reactive diluent and diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide as the photoinitiator for digital light processing (DLP) three-dimensional (3D) printing. The resulting 3D-printed parts exhibited good mechanical properties, with a Young's modulus of 1.5 GPa, and high thermal stability, with a T max of 410 degrees C. The chemical degradability of the 3D-printed materials was demonstrated in a mixture of tetrahydrofuran and diethylene triamine (1:1) at 80 degrees C for 48 h. The reusability of the recovered resin was demonstrated by adding fresh methacrylate vanillin and photoinitiator, followed by 3D printing using a DLP 3D printer. The 3D-printed parts produced from the recycled resin retained substantial mechanical properties, with a Young's modulus of 1.39 GPa, and thermal stability, with a T max of 390 degrees C.

10a3D printing10achemical degradation10acovalent adaptable network10al-glutamicacid10aVanillin1 aKamble, Ganesh, N.1 aGhute, Aaditi, P.1 aAsha, S., K. uhttps://library.ncl.res.in/content/recyclable-l-glutamic-acid-based-polyester-schiff-base-cross-linker-3d-printing-applications