f*******1
发帖数: 1 | 1 It's pretty interesting...
CALL it the yoga polymer: Nafion, a material used in some fuel cells, has an
unrivalled memory for contortions.
Tao Xie at General Motors in Warren, Michigan, has twisted and stretched a
Nafion strip into three distinct shapes, and found that it will revert to
each shape at the appropriate temperature.
Nafion becomes softer as it is heated. At 140 °C Xie stretched it into a
particular shape, which was locked in the polymer's "memory" as it cooled to
107 °C and stiffene | w********h
发帖数: 12367 | 2 do they have any applications?
to me, anything useless (fundamentally or practically) is not important or interesting.
an
to
【在 f*******1 的大作中提到】
: It's pretty interesting...
: CALL it the yoga polymer: Nafion, a material used in some fuel cells, has an
: unrivalled memory for contortions.
: Tao Xie at General Motors in Warren, Michigan, has twisted and stretched a
: Nafion strip into three distinct shapes, and found that it will revert to
: each shape at the appropriate temperature.
: Nafion becomes softer as it is heated. At 140 °C Xie stretched it into a
: particular shape, which was locked in the polymer's "memory" as it cooled to
: 107 °C and stiffene
| D********g
发帖数: 533 | 3 這篇Nature東西簡單 但是這聲勢真不小。。。
an
to
【在 f*******1 的大作中提到】
: It's pretty interesting...
: CALL it the yoga polymer: Nafion, a material used in some fuel cells, has an
: unrivalled memory for contortions.
: Tao Xie at General Motors in Warren, Michigan, has twisted and stretched a
: Nafion strip into three distinct shapes, and found that it will revert to
: each shape at the appropriate temperature.
: Nafion becomes softer as it is heated. At 140 °C Xie stretched it into a
: particular shape, which was locked in the polymer's "memory" as it cooled to
: 107 °C and stiffene
|
|
