Epoxidized PVA cross-linked with SRM-derived peptides for tackifiers

The hypothesis of this research is that epoxidized PVA can cross-link with the peptides derived from SRM. And the cross-linked products show comparable binding strength and water holding capacity to the commercial tackifier. Through the functional groups characterization on epoxy groups, amino groups and carboxylic groups, it was found that stable epoxidized PVA solution can be obtained from the PVA epoxidation which can effectively consume the amino groups of the SRM-derived peptides through cross-linking. The number of carboxylic groups in the peptides was not affected by the reaction. The resulted products show higher binding strength than the unmodified peptides which can be comparable to the commercial tackifier. Other properties were also defined to show the differences caused by the cross-linking. Unmodified PVA was used as a control to show the low reaction rate between peptides and PVA. The methods for each experiment can be found in the published paper.本研究的核心假设为：环氧化聚乙烯醇（epoxidized PVA）可与源自SRM的肽发生交联反应，且所得交联产物的结合强度与持水能力可与商用增粘剂相媲美。通过对环氧基团、氨基与羧基开展官能团表征，研究发现通过聚乙烯醇环氧化反应可制备得到稳定的环氧化聚乙烯醇溶液，该溶液可通过交联反应有效消耗源自SRM的肽的氨基，且肽中的羧基数量不受该反应的影响。所得产物的结合强度高于未改性肽，且可与商用增粘剂相媲美。此外，本研究还对其他性能进行了表征，以体现交联反应所带来的性能差异。本研究以未改性聚乙烯醇作为对照，用以体现肽与普通聚乙烯醇之间较低的反应速率。各项实验的具体方法可参见已发表的相关论文。