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class="ss"><div><span>导读： </span>热胀冷缩可能被颠覆，科学家制作出遇热收缩材料，利用 3D 打印技术可以将不同的材料混合在一起进行新材料的制作。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div> 在过去，大家都知道热胀冷缩的<a href="http://theory.oecr.com" target="_blank" class="relatedlink">物理</a>原理，目前<span style="line-height: 1.8em;">南加州工程大学的研究人员</span><span style="line-height: 25.2px;">利用3D打印技术</span><span style="line-height: 1.8em;">正在研发一种可定制<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>，受热时可以膨胀、收缩或者毫无变化。请让光电工程师的小编带您看看下面的内容吧。</span></div><div><span style="line-height: 1.8em;"><br></span></div><div><p style="text-align: center;"><a href="data/attachment/portal/201611/11/091313mfh9ut3ff5oqqrsz.jpg" target="_blank"><img src="data/attachment/portal/201611/11/091313mfh9ut3ff5oqqrsz.jpg"></a></p><p style="text-align: center;"><br></p></div><div><span style="line-height: 1.8em;"> 这种材料将不再受温度变化的影响，如今他们离这个目标已经越来越近了。如果这一想法能变成现实的话，该材料将在</span><span style="line-height: 25.2px;">制造业和</span><span style="line-height: 1.8em;">建筑业中有着广阔的应用前景。</span><span style="line-height: 1.8em;">通常情况下，多数材料在受热时体积会发生膨胀，因此一些大型建筑结构如桥梁和大楼在设计时都会设置伸缩缝，防止因过度挤压造成建筑结构的损坏。但当建筑结构由几种不同材料构建而成时，因材料属性的不同，在受热条件下膨胀的程度也有所不同，这对建筑结构的安全来说将是一个很大的考验。</span></div><div><br></div><div> 研究人员在制作该材料的过程中，利用 3D 打印技术可以将不同的材料混合在一起进行新材料的制作。这些材料开始是以液体形式被用于 3D 打印，然后再用紫外线进行固化。有了这一方法，研究人员可以将物体晶格结构内部的横梁按特定角度进行有序排列。不同材料受热的膨胀速率也有所不同，结果受热时物体整体非但没有膨胀，反而开始向里收缩，彻底颠覆了以往热胀冷缩的基本自然现象。<span style="line-height: 1.8em;">团队下一步计划是通过利用不同的材料组合及晶格结构，对物体膨胀和收缩速率进行精确控制，以便最终制作出完全不会受热量影响发生形变的材料。该材料将可以大大提高建筑结构的安全功能。</span></div><div><span style="line-height: 1.8em;"><br></span></div><div><p style="text-align: center;"><a href="data/attachment/portal/201611/11/091505zvvoosz65gokv45k.jpg" 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