Lignin-Based Spherical Structures and Their Use for Improvement of Cilazapril Stability in Solid State

Abstract

<jats:p>Biopolymer-based spherical particles exhibit unique properties including narrow sizes and many functional groups on their surfaces. Therefore, they show great potential for application in many scientific and industrial processes. The main aim of this study was to prepare lignin-based spherical particles with the use of a cationic surfactant, hexadecyl(trimethyl)ammonium bromide (CTAB). In the first step, different preparation procedures were tested with varying parameters, including biopolymer and surfactant ratios, lignin filtration, and experimental time. The morphological and dispersion characteristics of the materials were determined to select the best samples with the most promising properties, which could then be tested for their acute toxicity. It was observed that almost all materials were characterized by spherical shapes in micro- and nanosizes. The sample with the best physicochemical properties was used for further analysis and then tested for medical applications: the improvement of the stability of a drug molecule, cilazapril (CIL). The formulated material (CIL@LC-2a 1:1 wt./wt.) exhibited outstanding properties and significantly improved the stability of cilazapril as tested in conditions of increased temperature and humidity. Lignin spherical particles may be employed as a promising material for shielding other active compounds from decomposition.</jats:p>

Flammability Tests and Investigations of Properties of Lignin-Containing Polymer Composites Based on Acrylates

“…Additionally, a large quantity of lignin is available every year from various pulping and paper industries [ 7 , 8 , 9 , 10 ]. Lignin is considered to be one of the most prospective and sustainable bio-resources for the development of the environmentally friendly polymer composites [ 11 , 12 , 13 , 14 ]. Due to its chemical structure and the presence of different functional groups it can provide additional functionality in composites such as a reinforcing agent, filler, stabilizer, compatibilizer, etc.…”

Biokatalizatory I Biopolimery W Aspekcie Zrównoważonej Chemii

“…Ważnym nurtem badawczym jest także próba zaprojektowania funkcjonalnych mikro-i nanostruktur o sferycznym kształcie, głównie z udziałem ligniny kraft. Układy takie znajdują potencjalne zastosowanie jako selektywne systemy do dostarczania leków, w immobilizacji enzymów oraz w ochronie środowiska [90,91]. Selected hybrid materials with the participation of lignin together with their potential application, based on Przewiduje się, że najbliższym czasie tematyka związana z projektowaniem funkcjonalnych materiałów/biomateriałów, w tym hybrydowych, z udziałem ligniny i/lub jej pochodnych ulegnie jeszcze większemu zintensyfikowaniu.…”