Scholarlink

<p>The expansion of agro-industry creates large volumes of carbon-rich organic waste that pose environmental challenges but also offer opportunities for valorization as sustainable feedstocks for biocomposite production. This study aimed to produce and characterize bacterial cellulose nanofibers (BCN) from agro-industrial wastes (AIW) from soursop (<i>Annona muricata</i> L.; BCN-S) and genipap (<i>Genipa americana</i> L.; BCN-G) collected in the Brazilian Amazon. Substrates (2.5% w/v) were heated to 70&#xa0;°C for 15&#xa0;min and inoculated with 10% (w/v) starter culture SCOBY (symbiotic culture of bacteria and yeasts). The substrates exhibited variations in the carbohydrate-to-cellulose conversion profile due to the selective activity of SCOBY. BCN-G showed a good yield (14.50&#xa0;g/L), highest crystallinity index (CrI = 75.2%), a calculated crystallite size (D<sub>av</sub>) of 163.1&#xa0;nm and the presence of type I cellulose, as well as traces of type II cellulose. However, the control BCN sample (sucrose) exhibited a higher enthalpy of fusion (280&#xa0;J/g), suggesting greater crystalline purity. BCN-G was incorporated into potato-starch films (5–15% v/v) yielding homogeneous, mostly transparent films with strong UV-blocking (&gt; 99% in tested regions) and numerically lower water vapor permeability (from 1.36 to 1.24&#xa0;g.mm/m<sup>2</sup>.h.kPa for the 15% BCN sample). However, differences in some barrier metrics were not statistically significant. Overall, BCN derived from genipap byproducts appears promising as a biodegradable reinforcing agent for starch-based food packaging, supporting circular economy goals and SDG 12 (Responsible Consumption and Production).</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Valorization of amazonian fruit agro-industrial by-products for sustainable production of bacterial cellulose nanofibers for food bio-packaging

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月6日

查看全文
  • Kelvi Wilson Evaristo Miranda,
  • Gabriel Viana Sá,
  • Maryana Melo Frota,
  • João Paixão dos Santos Neto,
  • Miguel Ângelo Almeida Pinheiro de Carvalho,
  • Nuno Miguel Velosa Nunes,
  • Mariana Teixeira da Costa Machado,
  • Tiago Marcolino de Souza,
  • Maria do Socorro Rocha Bastos,
  • Lucicléia Barros de Vasconcelos

摘要

The expansion of agro-industry creates large volumes of carbon-rich organic waste that pose environmental challenges but also offer opportunities for valorization as sustainable feedstocks for biocomposite production. This study aimed to produce and characterize bacterial cellulose nanofibers (BCN) from agro-industrial wastes (AIW) from soursop (Annona muricata L.; BCN-S) and genipap (Genipa americana L.; BCN-G) collected in the Brazilian Amazon. Substrates (2.5% w/v) were heated to 70 °C for 15 min and inoculated with 10% (w/v) starter culture SCOBY (symbiotic culture of bacteria and yeasts). The substrates exhibited variations in the carbohydrate-to-cellulose conversion profile due to the selective activity of SCOBY. BCN-G showed a good yield (14.50 g/L), highest crystallinity index (CrI = 75.2%), a calculated crystallite size (Dav) of 163.1 nm and the presence of type I cellulose, as well as traces of type II cellulose. However, the control BCN sample (sucrose) exhibited a higher enthalpy of fusion (280 J/g), suggesting greater crystalline purity. BCN-G was incorporated into potato-starch films (5–15% v/v) yielding homogeneous, mostly transparent films with strong UV-blocking (> 99% in tested regions) and numerically lower water vapor permeability (from 1.36 to 1.24 g.mm/m2.h.kPa for the 15% BCN sample). However, differences in some barrier metrics were not statistically significant. Overall, BCN derived from genipap byproducts appears promising as a biodegradable reinforcing agent for starch-based food packaging, supporting circular economy goals and SDG 12 (Responsible Consumption and Production).