gel

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    Gel (dari bahasa Latin gelu — membeku, dingin, es atau gelatus — membeku) adalah campuran koloidal antara dua zat berbeda fase: padat dan cair. Penampilan gel seperti zat padat yang lunak dan kenyal (seperti jelly), tetapi pada rentang suhu tertentu dapat berperilaku seperti fluida (mengalir). Berdasarkan berat, kebanyakan gel seharusnya tergolong zat cair, tetapi mereka juga memiliki sifat seperti benda padat. Contoh gel adalah gelatin, agar-agar, dan gel rambut.
    Biasanya gel memiliki sifat tiksotropi (Ing.: thyxotropy): menjadi cairan ketika digoyang, tetapi kembali memadat ketika dibiarkan tenang. Beberapa gel juga menunjukkan gejala histeresis.
    Dengan mengganti cairan dengan gas dimungkinkan pula untuk membentuk aerogel ('gel udara'), yang merupakan bahan dengan sifat-sifat yang khusus, seperti massa jenis rendah, luas permukaan yang sangat besar, dan isolator panas yang sangat baik.
    Pada 2005 sebuah efek sound induced gelation didemonstrasikan.


    Aplikasi


    Banyak zat dapat membentuk gel apabila ditambah bahan pembentuk gel (gelling agent) yang sesuai. Teknik ini umum digunakan dalam produksi berbagai macam produk industri, dari makanan sampai cat serta perekat.


    Lihat pula


    Gel rambut
    Xerogel
    Gel silika (silica gel)
    Gel elektroforesis
    Gel kromatografi

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Gel - Wikipedia

A gel is a semi-solid that can have properties ranging from soft and weak to hard and tough. [1][2] Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in …

Gel Definition & Meaning - Merriam-Webster

The meaning of GEL is a colloid in a more solid form than a sol; broadly : jelly. How to use gel in a sentence.

GEL | English meaning - Cambridge Dictionary

GEL definition: 1. a thick, clear, liquid substance, especially one used on the hair or body: 2. a thick, clear…. Learn more.

GEL definition and meaning | Collins English Dictionary

GEL definition: a semirigid jelly-like colloid in which a liquid is dispersed in a solid | Meaning, pronunciation, translations and examples

GEL | definition in the Cambridge English Dictionary - Cambridge …

GEL meaning: 1. a thick, clear, liquid substance, especially one used on the hair or body: 2. a thick, clear…. Learn more.

Gel or Jell vs. Jelled or Gelled – Difference & Meaning - GRAMMARIST

When someone says “gel,” they’re talking about a semi-solid substance like hair gel, while the word “jell” means the process of turning a liquid substance into a jelly-like substance. It’s a fine …

Gel Definition in Chemistry - ThoughtCo

Jan 16, 2020 · A gel is a sol in which the solid particles are meshed such that a rigid or semi-rigid mixture results. Cross-linking within the gel's polymer or colloidal network causes a gel to …

Welcome to The GEL Group | The GEL Group

Oct 20, 2024 · GEL Laboratories is a full-service analytical chemistry and radiochemistry laboratory serving clients worldwide. GEL Engineering is a full-service environmental …

Gel | Polymer, Cross-Linking & Network | Britannica

gel, coherent mass consisting of a liquid in which particles too small to be seen in an ordinary optical microscope are either dispersed or arranged in a fine network throughout the mass. A …

GEL Definition & Meaning | Dictionary.com

Biochemistry. a semirigid polymer, as agarose, starch, cellulose acetate, or polyacrylamide, cast into slabs or cylinders for the electrophoretic separation of proteins and nucleic acids. gelled, …