The purpose of this work was to explore the possibility of using cotton gin trash (CGT) as an inexpensive and biodegradable filler for poly(vinyl alcohol) (PVOH). CGT was milled and screened to give fine particles, and the particles less than 150 um in size were used together with three PVOH polymers (with 1–20% vinyl acetate levels) to form composites. Up to 60% by weight of CGT could be incorporated into PVOH to form composite films. Relative to PVOH, these PVOH/CGT films showed reduced tensile strength and elongation at break but enhanced Young’s modulus. CGT was chemically modified through acetylation and succinylation; however, no significant improvement in mechanical properties was observed with these modifications, although acetylated CGT did exhibit somewhat improved elongation at break relative to unmodified CGT for the two PVOH polymers with higher vinyl acetate contents. Thus, for PVOH applications that need reduced cost but can tolerate decreased tensile strength and elongation, cotton gin trash can be used as a cost-effective filler.

这项工作的目的是探索使用轧花杜鹃花垃圾（CGT）作为聚乙烯醇（PVOH）廉价且可生物降解的填料的可能性。将CGT研磨并过筛，得到细颗粒，然后将小于150 um的颗粒与三种PVOH聚合物（醋酸乙烯酯含量为1-20％）一起使用以形成复合材料。可以将按重量计高达60％的CGT掺入PVOH中以形成复合膜。相对于PVOH，这些PVOH / CGT膜的拉伸强度和断裂伸长率降低，但杨氏模量提高。CGT通过乙酰化和琥珀酰化进行了化学修饰；但是，通过这些修改，机械性能没有明显改善，尽管对于具有较高乙酸乙烯酯含量的两种PVOH聚合物而言，乙酰化的CGT相对于未改性的CGT确实显示出改善的断裂伸长率。因此，对于需要降低成本但可以忍受降低的拉伸强度和伸长率的PVOH应用，可以将轧花废料用作具有成本效益的填料。