polymer gels一种聚合凝胶 The following information was part of our display for the SET96 and SET98 Scientific Power to the People Exhibition, The Galleries, Bristol, 20th and 21st March 1998.
' [2 G, |7 ~. g" x' Q A POLYMER is a very long molecule rather like a very long piece of string.; ^' N% y6 `- D: ^: {0 X
The borax joins two molecules together to make a large network - rather like a flexible scaffolding. This is cross-linking.
' b$ ]( U L( u+ N" ?1 U" p8 l This turns the fluid dissolved polymer into a GEL.. s7 e4 G% f5 `) a6 a8 P3 R7 M
In oilwells water is pushed down to push oil up. If this breaks through to the production well bore, the well will just produce water. A solution is to block the rock pores with polymer gel to make the well produce oil again. These gels can be made from naturally occurring sugar-based polymers such as Guar and they can be cross-linked with Cobalt or Chromium.
3 L, M8 E8 X4 c6 F c Other everyday examples of polymer gels are to be found in non-drip emulsion paints, foods, car tyres and agrochemicals.
9 ~. v6 p9 A; c C The polymer that we are using is POLYVINYL ALCOHOL and we are joining the strands together with BORAX. This gel, when coloured, is sold in toyshops as SLIME. |
发表于 2012-8-14 23:21:39
