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

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.

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-manufacturing00723nas a2200205 4500008004100000022001400041245010400055210006900159260000900228300001600237490000700253653000900260653001500269653001900284653002200303100001600325700003000341700001700371856012900388 2024 eng d a1944-824400aBiocompatible PVAc-g--PLLA acrylate polymers for DLP 3D printing with tunable mechanical properties0 aBiocompatible PVAcgPLLA acrylate polymers for DLP 3D printing wi cOCT  a62594-626050 v1610aacid10acopolymers10apolymerization10aTACONIC ANHYDRIDE1 aPal, Shibam1 aGavhane, Utreshwar, Arjun1 aAsha, S., K. uhttps://library.ncl.res.in/content/biocompatible-pvac-g-plla-acrylate-polymers-dlp-3d-printing-tunable-mechanical-properties01955nas a2200157 4500008004100000245010600041210006900147260000800216300001600224490000600240520137400246100001601620700002001636700001701656856012401673 2024 eng d00aRoom temperature photocurable PEEK polymer formulations for high-performance 3D printing applications0 aRoom temperature photocurable PEEK polymer formulations for high cJUN a1450–14590 v23 a

Digital light processing (DLP) technology was employed to 3D print acrylate-modified poly(ether ether ketone) (PEEK). PEEK and modified PEEK (mPEEK incorporating pendant pentadecyl chain) polymers were synthesized and end-capped with urethane acrylate units. These end-modified PEEK polymers were combined with commercially available (meth)acrylic cross-linkers and photoinitiator to create photocurable resin formulations suitable for DLP 3D printing. The resulting 3D-printed parts exhibited remarkable mechanical strength, with a Young’s modulus of 2.1 GPa. This surpassed the mechanical properties of commercial acrylate resin 3D-printed parts and achieved approximately 55% of the Young’s modulus of reported commercial PEEK polymer. Notably, the thermal properties of the 3D-printed materials were impressive, including a high glass transition temperature of 140 °C and stability with only around 10% weight degradation occurring at approximately 400 °C. These innovative resins demonstrated excellent printability with high resolution, enabling the fabrication of intricate shapes, including complex dental materials by DLP 3D printing. Their versatility extends to potential applications in dentistry, automobile manufacturing, and robotics.

1 aPal, Shibam1 aGaikwad, Yogesh1 aAsha, S., K. uhttps://library.ncl.res.in/content/room-temperature-photocurable-peek-polymer-formulations-high-performance-3d-printing02168nas 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

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.

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-lactate04782nas a2200265 4500008004100000245010400041210006900145260000800214300001200222490000700234520395300241653001604194653001704210653000804227653001204235653000804247653002204255653001804277100001804295700001804313700001704331700001604348700002004364856013204384 2025 eng d00aDLP 3D printing and characterization of PEEK-acrylate composite biomaterials for hip-joint implants0 aDLP 3D printing and characterization of PEEKacrylate composite b cJAN a172-1910 v273 a

Introduction. Hip joint replacement is considered the most complex and critically important orthopedic surgical procedure compared to knee and shoulder joint replacements. Over the past few decades, there has been significant advancement in hip joint replacement technology, and various biomaterials have been substantially improved. An increasing number of hip joint replacement surgeries are now successful, assisting individuals in regaining normal daily activity and work capacity comparable to their pre-fracture state. However, the need for revision surgery, specifically for implant replacement, is still observed in active patients several years following the initial operation. This underscores the need to develop durable biomaterials and customized hip joint implants to reduce implant wear and the risk of dislocation. This research study explores a novel PEEK-in-acrylate composite biomaterial with varied weight percentages of PEEK (0 %, 5 %, and 10 %) in an acrylate-based matrix. Tests were conducted to determine its properties, biocompatibility, and 3D printability. Based on the developed material, pins (in accordance with the ASTM standard) were fabricated using 3D printing for subsequent wear rate studies. The potential use of the developed composite materials for hip-joint applications was also thoroughly investigated. The purpose of this study is to develop and investigate a new PEEK in Acrylate composite biomaterial with varied weight percentages of PEEK (0 %, 5 %, and 10 %) in an acrylate-based matrix. The research includes an assessment of the material's properties, biocompatibility, and 3D printability. Using digital light processing (DLP) 3D printing technology at room temperature, pins (in accordance with the ASTM standard) were fabricated. An experimental study of dry sliding wear resistance was conducted on the resulting samples to determine the effect of PEEK weight fraction on the wear rate and frictional performance against an SS 316 steel disk. Scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS) were used to analyze the surface structure and element distribution within the material. The Methods of Investigation. Digital Light Processing (DLP) 3D Printing technique was used to 3D Print the ASTM pins and Acetabular liner with different weight fraction of PEEK in acrylate. Dry sliding wear tests were carried out using a pin-on-disk tribometer. During testing, the disk rotation speed and the normal load on the pin were varied. The studies were designed to determine the influence of input parameters on the wear rate. A total of nine experiments were conducted for each PEEK weight fraction, with a sliding distance of 4 km per experiment. The load ranged from 20 to 100 N, and the sliding speed varied from 450 to 750 rpm. Surface structure and element distribution were analyzed by Energy-dispersive X-ray spectroscopy (EDS) and Scanning electron microscopy (SEM). Result and Discussion. Current study demonstrates the advantages of varying the weight fraction of PEEK in Acrylate for DLP-fabricated biomaterials. Analysis of the SEM, EDS, and wear testing results indicated that the composite with 10 wt % PEEK in Acrylate exhibited superior microstructural integrity, elemental homogeneity, and significantly improved wear resistance. The 10 wt % PEEK in Acrylate composite, fabricated via DLP 3D printing, is suitable for biomedical implant and healthcare applications

10a3D printing10aBiomaterials10aFDM10aimplant10aPLA10aprint orientation10awear behavior1 aDama, Yogiraj1 aJogi, Bhagwan1 aPawade, Raju1 aPal, Shibam1 aGaikwad, Yogesh uhttps://library.ncl.res.in/content/dlp-3d-printing-and-characterization-peek-acrylate-composite-biomaterials-hip-joint-implants01999nas a2200265 4500008004100000022001400041245011500055210006900170260000900239300001100248490000800259520112600267653002301393653002101416653002001437653002101457653001101478100001901489700001601508700002301524700001601547700002501563700002101588856012401609 2026 eng d a0301-010400aMagnetically recoverable Fe3O4-lignin nanocomposites as a sustainable Fenton-like catalyst for dye degradation0 aMagnetically recoverable Fe3O4lignin nanocomposites as a sustain cAUG  a1131440 v6073 a

Fenton chemistry is a highly effective advanced oxidation processes (AOPs) for degrading organic pollutants in wastewater. However, conventional homogeneous Fenton systems face key drawbacks such as limited pH range, sludge formation, and poor recyclability. To address these challenges, iron oxide-based composites are used as efficient heterogeneous Fenton catalysts due to their strong redox activity and stability. In this work, Fe3O4-lignin nanocomposites were synthesized by a simple co-precipitation method and characterized using analytical techniques. The composites showed excellent performance, degrading 93% of MB far higher than pure Fe3O4 (48%). The enhanced activity stems from lignin's electron-donating and surface functional groups, which boost enhance Fe2+/Fe3+ cycling and promote center dot OH generation. A plausible degradation mechanism highlighting the synergistic role of lignin is proposed. The nanocomposites maintained high efficiency over five cycles, showing strong stability and magnetic recovery, making Fe3O4-lignin a promising and low-cost catalyst for wastewater treatment.

10aCatalytic activity10aCo-precipitation10aDye degradation10aFenton chemistry10alignin1 aKemprai, Rahul1 aSut, Nayana1 aHazarika, Swapnali1 aPal, Shibam1 aBhuyan, Balin, Kumar1 aGogoi, Parikshit uhttps://library.ncl.res.in/content/magnetically-recoverable-fe3o4-lignin-nanocomposites-sustainable-fenton-catalyst-dye