01589nas a2200205   4500008004100000022001400041245010200055210006900157260000800226490000800234520086200242653001601104653002801120653002901148653001401177653002701191100001601218700001701234856013201251       2022                        eng d  a1022-135200aBiodegradable, solvent-free photocrosslinkable PLLA resin formulations for additive manufacturing0 aBiodegradable solventfree photocrosslinkable PLLA resin formulat  cNOV0 v2233 a<p>
	Acrylate end-functionalized linear and star poly l-lactide (PLLA) based aliphatic, photocurable oligomeric crosslinkers are developed, which are formulated with hydroxyl (ethyl)methacrylate (HEMA) as a biodegradable reactive diluent to demonstrate successful application for solvent-less 3D printing using digital light processing (DLP) technique as well as a custom-designed direct ink writing 3D printer. The resin formulation for 3D printing is optimized using spot curing, photodifferential scanning calorimetry and cure depth analysis. The 3D printed parts exhibit promising mechanical property along with improved hydrophilicity and biodegradability. The development of new photocurable resin formulations are expected to meet the growing demand for raw materials that can be applied for developing custom designed bio implantable objects.</p>
10a3D printing10abiodegradable materials10adigital light processing10aL-Lactide10aphotocurable materials1 aPal, Shibam1 aAsha, S., K.  uhttps://library.ncl.res.in/content/biodegradable-solvent-free-photocrosslinkable-plla-resin-formulations-additive-manufacturing02168nas a2200205   4500008004100000022001400041245011400055210006900169260000900238490000800247520143600255653001601691653001601707653002901723653003401752653001401786100001601800700001701816856012901833       2024                        eng d  a0014-305700aThiol-ene-based degradable 3D printed network from bio resource derived monomers ethyl-lactate and isosorbide0 aThiolenebased degradable 3D printed network from bio resource de  cFEB 0 v2053 a<p>
	A polymeric ene-based thiol-ene network is reported that was demonstrated for light-based 3D printing. Allyl poly (acrylate ethyl lactate) (PAEL) was synthesized starting from ethyl lactate in an efficient and scalable manner. Ethyl lactate is a biobased material obtained naturally or chemically in high yields in the form of ethyl ester of lactic acid. Isosorbide, which is also a bio based resource was converted into thiol derivative and was used along with Pentaerythritol tetrakis(3-mercaptopropionate) (PETMP) as multifunctional thiol. The polymeric nature of the ene (i.e. PAEL) imparted exceptionally high mechanical properties like Young's modulus of 1.75 GPa as well as high thermal stability with a decomposition temperature (Td,10%) exceeding 350 C for all the networks studied. The properties could also be customized by fine tuning the type and stoichiometric ratio of the thiol crosslinked employed. For instance, the Young's modulus range from 1.75 GPa to 1.03 GPa and glass transition temperature range from 44 C to 54 C could be achieved. DLP 3D printing was used to demonstrate the printability of the resins with high resolution and structural fidelity. The study also highlights the basemediated rapid hydrolytic degradation efficiency of the 3D printed parts, demonstrating the applicability of these novel polymeric ene based thiol-ene for sustainable and eco-friendly 3D printable formulations.</p>
10a3D printing10aDegradation10adigital light processing10aPoly (acrylate ethyl lactate)10aThiol-ene1 aPal, Shibam1 aAsha, S., K.  uhttps://library.ncl.res.in/content/thiol-ene-based-degradable-3d-printed-network-bio-resource-derived-monomers-ethyl-lactate