Abstract：
:A cross-linking method for collagen-based biomaterials was developed using the water-soluble carbodiimide 1-ethyl-3-(3-dimethyl aminopropyl)carbodiimide hydrochloride (EDC). Cross-linking using EDC involves the activation of carboxylic acid groups to give O-acylisourea groups, which form cross-links after reaction with free amine groups. Treatment of dermal sheep collagen (DSC) with EDC (E-DSC) resulted in materials with an increased shrinkage temperature (Ts) and a decreased free amine group content, showing that cross-linking occurred. Addition of N-hydroxysuccinimide to the EDC-containing cross-linking solution (E/N-DSC) increased the rate of cross-linking. Cross-linking increased the Ts of non-cross-linked DSC samples from 56 to 73 degrees C for E-DSC and to 86 degrees C for E/N-DSC samples, respectively. For both cross-linking methods a linear relation between the decrease in free amine group content and the increase in Ts was observed. The tensile strength and the high strain modulus of E/N-DSC samples decreased upon cross-linking from 18 to 15 MPa and from 26 to 16 MPa, respectively. The elongation at break of E/N-DSC increased upon cross-linking from 142 to 180%.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Olde Damink LH,Dijkstra PJ,van Luyn MJ,van Wachem PB,Nieuwenhuis P,Feijen Jdoi
10.1016/0142-9612(96)81413-xsubject
Has Abstractpub_date
1996-04-01 00:00:00pages
765-73issue
8eissn
0142-9612issn
1878-5905pii
014296129681413Xjournal_volume
17pub_type
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