GATE (TF) Textile 2015 Question Paper Solution | GATE/2015/TF/59

Question 59 (Textile Engineering & Fibre Science)

Consider the following assertion [a] and reason [r] and choose the correct alternative from amongst A, B, C and D.
[a] Fluorochemicals impart very high water repellency.
[r] Fluorochemicals significantly reduce the surface energy of the treated substrate.

(A)[a] is right and [r] is wrong
(B)[a] is right and [r] is right
(C)[a] is wrong and [r] is wrong
(D)[a] is wrong and [r] is right
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Frequently Asked Questions | FAQs

What are flourochemicals used for?

Fluorochemicals, or fluorochemical finishes, in textile refer to a type of chemical treatment or coating applied to textiles to impart specific properties, such as water and oil repellency, stain resistance, and durability. Fluorochemicals used in textiles are typically based on compounds containing fluorine atoms and are designed to modify the surface properties of the textile fibers or fabrics.
Fluorochemical finishes in textiles are commonly used for various applications, including outdoor clothing, rainwear, upholstery, carpets, and other products where water and oil repellency, stain resistance, or other protective properties are desired. These finishes can provide the following benefits:
Water and Oil Repellency: Fluorochemical finishes can create a protective barrier on the surface of textiles, preventing water, oil, and other liquids from penetrating and causing stains or damage. This can help keep textiles dry, clean, and comfortable in wet or greasy conditions.
Stain Resistance: Fluorochemical finishes can help prevent the absorption of stains from common household substances such as food, beverages, and dirt, making it easier to clean and maintain textiles. Stains can be repelled from the fabric surface, reducing the likelihood of permanent staining.
Durability: Fluorochemical finishes can improve the durability of textiles by providing resistance to wear, abrasion, and other forms of damage. This can help extend the lifespan of textiles and maintain their appearance and performance over time.
Breathability: Some fluorochemical finishes are designed to provide water and oil repellency while still allowing the fabric to breathe, allowing moisture vapor to escape from the fabric and maintaining comfort.

It’s important to note that fluorochemical finishes used in textiles are subject to regulatory restrictions and guidelines in many countries due to concerns about their potential impact on the environment and human health. Some fluorochemicals, such as per- and polyfluoroalkyl substances (PFAS), have been associated with environmental persistence and bioaccumulation, and their use is regulated or restricted in some regions. Therefore, it’s crucial to use fluorochemical finishes in textiles that comply with applicable regulations and industry best practices to ensure safety and environmental sustainability.

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