MUMBAI, India, July 13 -- Intellectual Property India has published a patent application (202641083586 A) filed by Lijo Paul; St. Joseph'S College Of Engineering And Technology, Palai; Jilse Sebastian; Amrutha P. Thankachan; Yadukrishnan B; Asish Joseph; Edwin Thomson; and Colin Tom on July 07, 2026, for Photocurable Bio-Resin Composition Comprising Biodegradable Functionalized Cellulose Nanocrystals Derived From Lignocellulosic Biomass For Additive Manufacturing.
Inventors include Lijo Paul; St. Joseph'S College Of Engineering And Technology, Palai; Jilse Sebastian; Amrutha P. Thankachan; Yadukrishnan B; Asish Joseph; Edwin Thomson; and Colin Tom.
The application for the patent was published on July 10, 2026, under issue no. 28/2026.
Abstract: The present invention relates to a sustainable and photocurable resin from biodegradable material composition comprising functionalized cellulose nanocrystals derived from lignocellulosic biomass and a photocrosslinkable hydrogel matrix for use in vat photopolymerization-based additive manufacturing. The invention provides a method comprising extraction of cellulose nanocrystals from lignocellulosic biomass by pretreatment, alkali treatment, bleaching, acid hydrolysis, and purification, followed by chemical functionalization of the cellulose nanocrystals with methacrylate groups using a silane coupling reagent. The functionalized cellulose nanocrystals are uniformly dispersed in an acrylated carboxymethyl cellulose hydrogel matrix together with at least one photoinitiator and optional additives to form a homogeneous photocurable resin from biodegradable material composition. Upon exposure to ultraviolet or visible light during stereolithography (SLA), digital light processing (DLP), liquid crystal display (LCD)-based printing, or other vat photopolymerization processes, the methacrylate-functionalized cellulose nanocrystals and the photocrosslinkable hydrogel matrix undergo simultaneous photopolymerization and crosslinking to form a reinforced three-dimensional polymer network. The resulting photocurable resin from biodegradable material is suitable for fabricating three-dimensional articles for applications including biomedical devices, tissue engineering scaffolds, controlled drug delivery systems, sustainable packaging, water purification, functional coatings, rapid prototyping, and other advanced engineering applications.
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