本文目录一览:
- 1、天然纳米纤维给人们的思路是什么
- 2、纳米纤维不能应用的原因
- 3、什么是纳米纤维素
天然纳米纤维给人们的思路是什么
纳米技术目前已成功用于许多领域,包括医学、药学、化学及生物检测、制造业、光学以及国防等等。
包括以下领域思路。
1、纳米技术在新材料中的应用。
2、纳米技术在微电子、电力等领域中的应用。
3、在纺织和化纤制品中添加纳米微粒,可以除味杀菌。化纤布虽然结实,但有烦人的静电现象,加入少量金属纳米微粒就可消除静电现象。
纳米纤维不能应用的原因
纳米纤维不能普及的原因是技术不成熟和价格贵。
纳米纤维不能普及的原因有两点,其一:目前技术尚不成熟;
其二:价格较昂贵。
纳米技术在中国的发展,大部分还停留在科研的阶段,极少部分可以商业化,产业化。所以现在纳米纤维主要用于高端零件生产,对于日常使用的纤维,其价格并不实惠,消费人群较少。
什么是纳米纤维素
纳米纤维是指直径为纳米尺度而长度较大的具有一定长径比的线状材料,此外,将纳米颗粒填充到普通纤维中对其进行改性的纤维也称为纳米纤维。
狭义上讲,纳米纤维的直径介于1nm到100nm之间,但广义上讲,纤维直径低于1000nm的纤维均称为纳米纤维。
制造纳米纤维的 *** 有很多,如拉伸法、模板合成、自组装、微相分离、静电纺丝等。其中静电纺丝法以操作简单、适用范围广、生产效率相对较高等优点而被广泛应用。
扩展资料:
纳米纤维到底有何特点,多数材料小到以纳米论长短时,其本身的物理和化学性能将有所改变,主要表现在:
1、表面效应 粒子尺寸越小,表面积越大,由于表面粒子缺少相邻原子的配位,因而表面能增大极不稳定,易与其他原子结合,显出较强的活性。
2、小尺寸效应 当微粒的尺寸小到与光波的波长、传导电子的德布罗意波长和超导态的相干长度透射深度近似或更小时,其周期性的边界条件将被破坏,粒子的声、光、电磁、热力学性质将会改变,如熔点降低、分色变色、吸收紫外线、屏蔽电磁波等。
3、量子尺寸效应 当粒子尺寸小到一定时,费米能级附近的电子能级由准连续变为离散能级,此时,原为导体的物质有可能变为绝缘体,反之,绝缘体有可能变为超导体。
参考资料:百度百科---纳米纤维
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