CAJ | 학술논문

采用 TEMPO(2,2,6,6-四甲基哌啶氧化物自由基)氧化纤维素纳米纤维(TOCNs)作为聚乙烯醇(PVA)/水性聚氨酯(WPU)静电纺膜的增强剂。研究中使用拉伸实验研究 TOCNs 的增强作用,此外还使用扫描电子显微镜、红外光谱仪、热重分析仪及差示扫描量热仪等对静电纺膜进行结构性能表征。扫描电镜观察发现当纳米纤维素加入量为5％(质量分数)时,其在聚合物基质中分散良好,所得静电纺纳米纤维保持了良好的形态。此外,加入5％(质量分数)的纳米纤维素能够将材料的抗张强度提高44％,且纳米纤维素的加入对材料的热稳定性也有一定的改善,纳米纤维素起到一种纳米填料的效果。鉴于 PVA、WPU、TOCNs均为亲水性,无毒且具有生物相容性的物质,所得静电纺膜在组织支架及伤口护理材料等方面具有潜在应用。
채용 TEMPO(2,2,6,6-사갑기고정양화물자유기)양화섬유소납미섬유(TOCNs)작위취을희순(PVA)/수성취안지(WPU)정전방막적증강제。연구중사용랍신실험연구 TOCNs 적증강작용,차외환사용소묘전자현미경、홍외광보의、열중분석의급차시소묘량열의등대정전방막진행결구성능표정。소묘전경관찰발현당납미섬유소가입량위5％(질량분수)시,기재취합물기질중분산량호,소득정전방납미섬유보지료량호적형태。차외,가입5％(질량분수)적납미섬유소능구장재료적항장강도제고44％,차납미섬유소적가입대재료적열은정성야유일정적개선,납미섬유소기도일충납미전료적효과。감우 PVA、WPU、TOCNs균위친수성,무독차구유생물상용성적물질,소득정전방막재조직지가급상구호리재료등방면구유잠재응용。
TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-oxidized cellulose nanofibers (TOCNs)were used as nanofillers for polyvinyl alcohol/waterborne polyurethane electrospun nano-fiber mats in this work.The reinforcing capability of TOCNs was investigated by tensile tests.SEM,IR,TGA and DSC were also carried out in order to characterize the influence of the cellulose nanofibers on electrospun mats.Scanning electron mi-croscopy results showed that TOCNs were well dispersed in PVA/WPU matrix.The reinforced composites had a ca.44% increase in their mechanical properties with addition of only 5wt% of TOCNs.Moreover,The addi-tion of TOCNs improved the thermal stability of PVA/WPU electrospun mats.TOCNs were working as Nano-fillers in the composite.Since PVA,WPU and TOCNs are hydrophilic,non-toxic and biocompatible,and there-fore,these electrospun nano-fiber mats could be used for tissue scaffolding and wound dressing materials,etc.