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Stereomicrostructure-regulated biodegradable adhesives ÒÑÓÐ1È˲ÎÓë
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Stereomicrostructure-regulated biodegradable adhesives Á¢Ìå΢½á¹¹µ÷½ÚµÄ¿ÉÉúÎï½µ½â½ºÕ³¼Á ¡ø ×÷ÕߣºZHEN ZHANG, ETHAN C. QUINN, JACOB K. KENNY, ALEXANDRA GRIGOROPOULOS, JASON S. DESVEAUX, TIFFANY CHEN, LI ZHOU, TING XU, GREGG T. BECKHAM, AND EUGENE Y.-X. CHEN ¡øÁ´½Ó£º https://www.science.org/doi/10.1126/science.adr7175 ¡øÕªÒª£º ´Ó½º´øµ½½ºË®£¬Õ³ºÏ¼Á±»¹ã·ºÓ¦ÓÃÓÚ¸÷ÖÖ³¡ºÏ¡£´ó¶àÊýÊǵäÐ͵ÄʯÓÍ»ùÈȹÌÐÔÍøÂç»ò²»¿ÉÉúÎï½µ½âµÄÈÈËÜÐÔÈÈÈÛ½º¡£Ñо¿ÕßʹÓÃÒ»×éîÆ»ù¡¢ïç»ùºÍÁ×»ù´ß»¯¼ÁºÏ³ÉÁËһϵÁоßÓв»Í¬·Ö×ÓÁ¿¡¢Î¢¹Û½á¹¹ºÍÕ½ÊõµÄ¾ÛºÏÎ¡ª¾Û3-ôÇ»ù¶¡Ëáõ¥£¨P3HBs£©¡£ ·Ç¾§¾ÛºÏÎïÍùÍù¸üÕ³£¬µ«Ò²¸üÈõ£¬¶ø¾§Ìå¾ÛºÏÎïÔÚÁ÷¶¯ºÍÌî³ä±íÃæ²»¹æÔòÐÔ·½ÃæºÜ²î£¬¶øÕâÊÇÐγÉÇ¿¼üµÄ¹Ø¼ü¡£Ñо¿Õß·¢ÏÖ£¬°ë½á¾§µÄ¸»¶þ´úP3HB²»½öÌṩÁË×îºÃµÄ¸½×ÅÁ¦£¬¶øÇÒ»¹ÓÅÓÚÐí¶àÉÌÒµÌæ´úÆ·¡£ÓÉÓÚP3HBsÄܹ»ÓÉϸ¾ú²úÉú£¬²¢ÇÒ¿ÉÒÔÉúÎï½µ½â£¬Òò´ËÓпÉÄÜÒԿɳÖÐøµÄ·½Ê½Éú²úÕâЩճºÏ¼Á¡£ ¡ø Abstract£º From tapes to glues, adhesives are used in a wide range of applications and situations. Most are typically petroleum-based thermoset networks or nonbiodegradable thermoplastic hot melts. Zhang et al. used a set of yttrium-, lanthanum-, and phosphorus-based catalysts to synthesize a series of poly(3-hydroxybutyrate) polymers (P3HBs) with different molecular weights, microstructures, and tacticities. Amorphous polymers tend to be stickier but also weaker, whereas crystalline ones are poor at flowing and filling surface irregularities, which is key to forming a strong bond. The authors found that semicrystalline syndio-rich P3HB not only provides the best adhesion, but can also outperform many commercial alternatives. Because P3HBs are able to be produced by bacteria and can be biodegradable, it may be possible to produce these adhesives in a sustainable way. |
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