What does wetting paper make it weak?

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Offline Will Harris

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What does wetting paper make it weak?
« on: 20/04/2009 23:30:03 »
Will Harris  asked the Naked Scientists:
   
Why does water weaken paper?
 
Thank you
 
Will Harris

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Offline Chemistry4me

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What does wetting paper make it weak?
« Reply #1 on: 21/04/2009 01:23:18 »
Paper/wood is made of cellulose fibres, the cellulose chains are linked by polar -OH groups. These -OH groups are attracted to neighbouring -OH groups on adjacent cellulose chains, a condense polymer forms which helps to hold the fibers together in the paper, making it stiff. Water molecules are also polar, and therefore are also attracted to these -OH regions. When the paper is wet it loses strength because the water molecules get between the cellulose chains and weakens the attraction between them.


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Offline Raghavendra

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What does wetting paper make it weak?
« Reply #2 on: 21/04/2009 12:44:25 »
generally to say:- Water has a ability to dissolve, it also depends upon the density, dilution, pH-Value.... 

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Offline 112inky

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What does wetting paper make it weak?
« Reply #3 on: 30/04/2009 19:48:07 »
water disolve the cellose bonding