Modification of Silk Fibers via β-cyclodextrin – Empirical Modeling and Process Optimization Using Response Surface Methodology

ABSTRACT

Modification of silk fabric via grafting with β-cyclodextrin (β-CD) using citric acid (CA) as a cross-linking agent was studied and optimized. A four-factor central composite design combined with response surface methodology (RSM) was employed to optimize the reaction conditions (CA and β-CD concentration, curing temperature, and time) for preparation of β-CD modified silk fabric with a maximum degree of grafting yield and minimum strength loss and minimum yellowness Index. Analysis of variance (ANOVA) proposed a significant quadratic model for optimizing of grafting factors. From the obtained results, it is concluded that CA concentration and curing temperature had a greater influence on grafting yield than curing time and CD concentration. The optimum grafting condition was obtained at β-CD concentration: (57 g/L), CA concentration: (57 g/L), curing temperature: (167°C), and curing time (4 min) which results grafting of CD equal to 10%.

摘要

研究了以柠檬酸（CA）为交联剂，β-环糊精（β-CD）接枝改性真丝织物.采用四因素中心复合材料设计，结合响应面法（RSM），对制备接枝率最高、强度损失最小、黄度指数最小的β-CD改性丝织物的反应条件（CA和β-CD浓度、固化温度和时间）进行了优化.方差分析（ANOVA）为嫁接因子的优化提出了一个显著的二次模型.结果表明，CA浓度和固化温度对接枝率的影响大于固化时间和CD浓度.在β-CD浓度：（57g/L）、CA浓度：（57g/L）、固化温度：（167℃）和固化时间（4min）条件下，接枝率可达10%.

KEYWORDS:

• Silk fabric
• β-cyclodextrin
• crosslinking
• polycarboxylic acid
• response surface methodology
• optimization
• empirical modeling

关键词:

• 丝织物
• β-环糊精
• 交联
• 聚羧酸
• 响应面方法
• 优化
• 经验建模

Abbreviations

SF	=	Silk fabric
β-CD	=	β-cyclodextrin
CDs	=	cyclodextrins
CA	=	Citric acid
RSM	=	Response surface methodology
ANOVA	=	Analysis of variance
SHP	=	Sodium hypophosphite
CCD	=	Central Composite Design
FTIR	=	Fourier-transform infrared spectroscopy
YI	=	Yellowness Index