РОССИЙСКАЯ АКАДЕМИЯ НАУК

УРАЛЬСКОЕ ОТДЕЛЕНИЕ

ИНСТИТУТ ХИМИИ TBEPДОГО ТЕЛА
   
| | | | |
| | | |
 23.12.2009   Карта сайта     Language По-русски По-английски
Новые материалы
Экология
Электротехника и обработка материалов
Медицина
Статистика публикаци


23.12.2009



Self-healing networks mimic nature



22 December 2009



A new method to make complex microvascular networks could revolutionise tissue engineering, claim US scientists. 


Nature is full of examples of vascular networks, such as blood vessels in the human body and veins in leaves that transport fluid or other substances to promote growth and healing. Jennifer Lewis at the University of Illinois and colleagues have developed a technique to mimic these networks on a polymer matrix. The polymer system makes it capable of self healing, allowing any cracks or tears to be healed making it stronger and more durable than previous attempts. 











Microvascular networks, such as those found in leaves, can be made




Lewis's networks were created using a wax-based organic ink to write the patterns using a single 10 µm nozzle. By altering the writing speed and pressure, Lewis was able to vary the size of the microfluidic channels, eliminating the need for different nozzle sizes. When the pattern is complete the temperature is raised to liquefy the ink and remove it using a vacuum. The completed microchannel network is left in the polymer. 


Lewis used the technique to produce a variety of patterns including a square matrix, three generation structure that mimics the veins in an ivy leaf and a six generation network with many more branches then previously possible. 


The fluid transport was most efficient when the network structure was designed in accordance with Murray's law, which is a formula for relating the radii of daughter branches to the radii of the parent branch of biological tubular systems, explains Lewis. 


The future for these systems would appear to be very promising for many applications says Lewis. 'These novel constructs offer a potential new platform for tissue engineering,' she adds. 


Paul Cooper 


Enjoy this story? Spread the word using the 'tools' menu on the left or add a comment to the Chemistry World blog.




Link to journal article



Direct-write assembly of biomimetic microvascular networks for efficient fluid transport
Willie Wu, Christopher J. Hansen, Alejandro M. Aragón, Philippe H. Geubelle, Scott R. White and Jennifer A. Lewis, Soft Matter, 2010
DOI: 10.1039/b918436h


Дизайн и программирование N-Studio 
А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

  • © 2004-2019 ИХТТ УрО РАН
    беременность, мода, красота, здоровье, диеты, женский журнал, здоровье детей, здоровье ребенка, красота и здоровье, жизнь и здоровье, секреты красоты, воспитание ребенка рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок медицина, клиники и больницы, болезни, врач, лечение, доктор, наркология, спид, вич, алкоголизм православные знакомства, православный сайт творчeства, православные рассказы, плохие мысли, православные психологи рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок