Work

Experimental Design of Composites Based on Layered Double Hydroxide, PVP, and PVPP for Craft Beer Clarification

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Here we aimed to design, characterize, and optimize the composition of composites with potential application in the clarification of craft beer. Composites were prepared from layered double hydroxide (LDH), polyvinylpyrrolidone (PVP360) and polyvinylpolypyrrolidone (PVPP) through sonication at room temperature followed by filtration, according to a Central Composite Rotatable Design (CCRD). Samples were applied to craft beer at the proper maturation stage, measuring the turbidity of the beverage as an experimental response. Characterization of composites by FTIR and X-ray diffractometry indicated the possibility of hydrogen bonds and an increase in the hydration degree at the interlayer region of LDH, with the absence of intercalation and exfoliation. Surface morphologies observed under SEM and TEM microscopies showed particles with typical features of individual components with good dispersion and apparent interfacial adhesion. Multiple regression analysis yielded a full quadratic model showing the dependence of the response on the composition variables, with a coefficient of determination ( R 2 ) of 0.99663. Analysis of variance showed that, except for the LDH*PVP360 interaction, all other coefficients were found to be statistically significant. Response surfaces showed that minimum turbidity (75.89 NTU) was reached for the composite prepared from level 0 of both LDH and PVP360, with PVPP at the +1.682 level, while the turbidity of the untreated sample remained higher than 289. Future perspectives include preparation of nanocomposites through precipitation of LDH in the presence of PVP solution prior to addition of PVPP.

Source: ACS Food Science & Technology

DOI: 10.1021/acsfoodscitech.4c01020

Authors: Luana Caliandra Freitas de Carvalho, Danilo Santos Souza, Maycon Fagundes Teixeira Reis, Iara de Fátima Gimenez

Institution: Universidade Federal de Sergipe

Language: English

Topic: Layered Double Hydroxides Synthesis and Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,500

Funders: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação de Apoio à Pesquisa e à Inovação Tecnológica do Estado de Sergipe