来自Playa del Carmen Sargassum的酸盐:提取,表征和溶液和水凝的rheological分析
Frank Manuel León-Martínez1, Luis Medina-Torres2, Delia Soto-Castro3
1CIIDIR Unidad Oaxaca, Instituto Politécnico Nacional, Hornos 1003, Santa Cruz Xoxocotlán, Oaxaca 71230, Mexico.
International journal of biological macromolecules
|June 1, 2025
概括
研究人员从侵袭性Sargassum海藻中分离出酸盐,产生了28%的生物聚合物. 这种Sargassum alginate被用来制造强大的,弹性的水凝,在生物材料中具有潜在的应用.
科学领域:
- 海洋生物学 海洋生物学
- 聚合物科学 聚合物科学
- 生物材料工程 生物材料工程
背景情况:
- 墨西哥加勒比地区面临生态和经济挑战,原因是经常出现的萨加索海藻涌入.
- 体生物质是一个未充分利用的资源,具有提取有价值的生物聚合物的潜力.
研究的目的:
- 从Sargassum生物质中分离和表征藻酸盐.
- 为了评估从这种提取的酸盐制造的水凝的特性.
主要方法:
- 多阶段隔离,包括超过,以获得酸.
- 福利埃变换红外光谱 (FTIR) 和1H核磁共振 (NMR) 用于化学表征.
- 用Z电位和粘度分析来评估分子性质.
- 双顺序凝过程用于水凝形成和机械测试.
主要成果:
- 酸被成功分离出来,产量为28%,纯度为77%.
- FTIR和NMR分析证实了酸盐结构,曼努龙/古鲁龙比为0.71.1.
- 提取的酸盐表现出524.9mL/g的内在粘度和127.4kg/mol的分子质量.
- 稳定,刚性,开放细胞的水凝 (2% w/v) 产生了80kPa的压缩强度.
结论:
- 尽管含有杂质,但石灰衍生的酸盐可以有效地加工成强大的水凝.
- 藻酸盐的独特性质 (低分子质量,低M/G比) 促进了弹性和强大的水凝形成,并减少了协同作用.
- 这项研究突出了一个可持续的价值化途径,用于侵入性藻生物质转化为功能生物材料.
相关概念视频
01:12Solvents
A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
A...
02:02Responses to Salt Stress
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
01:17Precipitation and Co-precipitation
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
00:53Extraction: Effects of pH
Consider a neutral form of an amine, B, with a partition coefficient, K, in a liquid mixture containing organic and aqueous phases. The pH of the aqueous phase affects the charge on acidic and basic solutes, and the charged form is usually more soluble in the aqueous phase. Suppose the conjugate acid form of the amine is soluble only in the aqueous phase while the base form is soluble in both phases. Then the distribution coefficient, D, can be given as the ratio of amine concentration in the...