Whether it's frizzy or flyaway, nearly everyone puts up with an unruly head of hair from time to time. Now scientists have trained their microscopes on hair to find out why it misbehaves - and how to tame it.
In a new study, said to be the first of its kind, German researchers say they've gotten extreme-close-up views of how hair fibres interact. Their insights could lead to products that banish bad hair days for good, they say.
"At the moment, it is not known why hair feels good," explained study co-author Eva Max, a doctoral student in chemistry at the University of Bayreuth in Germany. That, in turn, makes it difficult to scientifically study hair care products, which make up a US$60 billion industry worldwide.
In the new study, Max and colleagues explored the workings of hair with an atomic-force microscope and samples of Caucasian female hair. The study authors were scheduled to present their findings at the American Chemical Society's national meeting, in Philadelphia.
Findings could influence new hair products
According to the team, damage to hair causes scaly projections to protrude from hair fibres. These projections create friction with other fibres and make hair feel rough to the touch and hard to comb.
The researchers also found that electrical charges build up on hair, causing friction. The next step is to figure out what happens to the hair when it's exposed to hair-care products such as shampoo and conditioner.
"There are several changes that take place at the same time when hair is exposed to hair care products, and it will help to understand which of those changes is crucial for optimising hair care," Max said. "If, for example, it would turn out that there is an optimum friction between single hairs for pleasant (touch), the molecular composition of hair-care products can be optimised to achieve this friction."
Steven Shiel, who studies hair at Proctor & Gamble, said the German research could help shed more light on how hair fibres interact and lead to better hair care products. "Those invisible-to-the-eye changes have a great impact on how the ingredients in the products affect the hair," he said.
Hair styling products have become more sophisticated in recent years, and this has much to do with science, said Shiel, an associate director with P&G Beauty.
"A lot of it is based on this fundamental understanding of hair's underlying structure and properties," he said. "Fundamentally understanding the hair structure is really important in terms of developing products that really deliver." – (HealthDay News, August 2008)
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