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The titration of a weak acid with a strong base results in the formation of water and the conjugate base of the acid. For instance, titrating acetic acid with sodium hydroxide leads to the formation of water and sodium acetate. A solution of acetic acid and sodium acetate constitutes a buffer whose relative concentration at different stages of the titration is indicated by the α values, which represent percentages of the weak acid and its conjugate base.
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Classifying Matter by Composition03:35

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Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures. 
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Cellulose and Pectic Polysaccharides01:15

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 Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth.  Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
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The blood in our bodies comprises three major components: blood plasma, formed elements, and the extracellular matrix. Blood plasma is a yellowish fluid that constitutes 55% of the total blood volume. It is primarily made up of water and essential substances such as electrolytes and proteins. Blood plasma serves as a medium for transporting blood cells and also contains nutrients, enzymes, hormones, antibodies, and gases.
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Composite Bodies00:55

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A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
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Composition of Body Fluids01:29

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Water functions as a solvent accommodating various solutes, which can be categorized under electrolytes and non-electrolytes. Non-electrolytes are usually held together by covalent bonds, restricting them from dissociating in solution, thereby leading to a lack of electrically charged components upon dissolving in water. They are predominantly organic molecules, such as glucose, creatinine, and urea. Electrolytes, on the other hand, are compounds that can break down into ions in water.
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Updated: Jan 23, 2026

Rapid Manufacturing of Thin Soft Pneumatic Actuators and Robots
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Actuador Blando Multirrespuesta Basado en Compuesto de Nanofibras de Celulosa/MXeno para Robots Blandos Programables

De-Min Zhang1, Jia-Hui Zhang1, Bo Ma1

  • 1Shanxi Key Laboratory of Artificial Intelligence & Micro Nano Sensors, College of Integrated Circuits, Taiyuan University of Technology, Taiyuan 030024, China.

ACS applied materials & interfaces
|January 22, 2026
PubMed
Resumen

Los investigadores crearon un nuevo actuador flexible utilizando nanofibras de celulosa/MXeno (MXC) y cinta de polipropileno (BOPP). Este actuador multirrespuesta puede programarse para formas complejas de 2D a 3D, avanzando en las aplicaciones de robótica blanda.

Palabras clave:
nanofibras de celulosa/MXenoactuadoresmultirrespuestaprogramabilidad de formarobots blandos

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Área de la Ciencia:

  • Ciencia de los Materiales
  • Ingeniería Robótica
  • Nanotecnología

Sus antecedentes:

  • Los actuadores flexibles son cruciales para los robots blandos, ya que permiten la conversión de energía en movimiento mecánico.
  • Los actuadores existentes enfrentan desafíos en la respuesta multiestímulo, la programabilidad de la forma y la estabilidad mecánica para entornos complejos.

Objetivo del estudio:

  • Desarrollar un novedoso actuador bicapa multirrespuesta y programable.
  • Superar las limitaciones de los actuadores actuales en cuanto a respuesta, programabilidad y estabilidad.

Principales métodos:

  • Fabricación de un actuador bicapa utilizando un film compuesto de nanofibras de celulosa/MXeno (MXC) y cinta de polipropileno biorientado (BOPP).
  • Aprovechamiento de las propiedades higroscópicas, fototérmicas y electrotérmicas del MXC, y la expansión térmica del BOPP para la actuación.
  • Empleo de diseño de patrones y ensamblaje macroscópico para deformaciones programables de 2D a 3D.

Principales resultados:

  • El actuador demostró una flexión reversible, de gran ángulo y estable bajo estímulos de humedad, luz y eléctricos.
  • Se lograron deformaciones complejas programables combinando estrategias de diseño de patrones y ensamblaje.
  • Se desarrollaron con éxito robots blandos de prueba de concepto, incluyendo una hoja biomimética, una pinza inteligente y un robot escarabajo reptante.

Conclusiones:

  • El actuador bicapa MXC/BOPP desarrollado ofrece una respuesta multiestímulo y programabilidad de forma mejoradas.
  • Este diseño de actuador tiene un potencial significativo para avanzar en las capacidades y aplicaciones de la robótica blanda de próxima generación.