竹纤维基纳米二氧化硅杂化改性的物化性能  

Physicochemical properties of hybrid modification of bamboo fiber based nano silica

作　　者：丁雯[1] DING Wen(Jiangxi Institute of Fashion Technology,Nanchang 330201,Jiangxi,China)

机构地区：[1]江西服装学院,江西南昌330201

出　　处：《上海纺织科技》2023年第11期9-12,70,共5页Shanghai Textile Science & Technology

基　　金：2021年江西省高等学校教学改革研究省级课题(JXJG-21-26-1)。

摘　　要：利用正硅酸乙酯水解生成硅醇的自身缩合与竹纤维羟基发生缩合的反应,采用纳米二氧化硅对制备竹纤维进行杂化反应,并对杂化前后织物的物化性能进行表征,分析杂化的可行性。测试表明,利用生竹制备的工艺纤维平均长度为26.24 mm,最长为65.42 mm,最短为9.42 mm,线密度为11.49 dtex,断裂强度为15.72 cN/dtex,断裂伸长率为4.85%,横截面呈扁平网状,纤维表面存在沟槽和裂缝,纤维中间具有腰圆型孔洞,孔洞直径约20~30μm。竹纤维经过杂化后,扫描电镜与能谱测试表明纳米二氧化硅能够与竹纤维发生杂化反应,杂化前后其分子结构依然为天然纤维素Ⅰ的晶型结构,结晶度、力学性能略有下降,热失重残存率略有上升,热降解符合1级热降解反应动力学。By utilizing the self condensation reaction of ethyl orthosilicate hydrolysis to generate silica alcohol and the condensation reaction of bamboo fiber hydroxyl groups,nano silica is used to hybridize the prepared bamboo fibers,and the physicochemical properties of the fabric before and after hybridization are characterized to analyze the feasibility of hybridization.The tests show that the average length of the process fiber prepared by raw bamboo is 26.24 mm,with a maximum length of 65.42 mm and a minimum length of 9.42 mm.The linear density is 11.49 dtex,the breaking strength is 15.72 cN/dtex,and the elongation at break is 4.85%.The cross section is flat and reticulated,and there are grooves and cracks on the surface of the fiber.There are waist shaped holes in the middle of the fibers,with a diameter of about 20~30μm.After hybridization of bamboo fibers,scanning electron microscopy and energy spectrum tests show that nano silica can undergo hybridization reaction with bamboo fibers.Before and after hybridization,its molecular structure remains the crystalline structure of natural cellulose 1,with a slight decrease in crystallinity and mechanical properties.The thermal weight loss residual rate increases slightly,the thermal degradation conforms to the first-order thermal degradation kinetics.

关 键 词：竹纤维 二氧化硅 微观形貌 能谱 分子结构 热学性能 力学性能 

分 类 号：TS102.2[轻工技术与工程—纺织工程]