Process optimization of nanocrystalline cellulose from sunflower seed hull and its characterization

	Process optimization of nanocrystalline cellulose from sunflower seed hull and its characterization
	Chen, S.; H. Tao; Y. Wang; Z. Ma and L. Zhang
	2015
发表期刊	Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
卷号	31 期号:15 页码:302-308
摘要	Nanosized single crystal cellulose is often called whisker. Nano-whisker or nanofibrils can be prepared from various sources, such as natural fibers, agricultural by-products, and marine animals. Nano-whiskers are characterized by excellent mechanical properties, high specific surface area, high length-diameter ratio, environmental friendliness, and low cost. Because of these properties, nano-whiskers are used in many fields and attract growing attention by researchers in the world. In China, the agricultural product processing industry yields abundant cellulose waste. Thus, it becomes meaningful to find out a better resolution to 'agricultural cellulose waste'. In this study, nano-cellulose was prepared by a sulphuric acid hydrolysis method and with shells of sunflower seeds as raw material. The effects of four factors (e.g. acid hydrolysis temperature, sulfuric acid concentration, acid hydrolysis time, and liquid to material) on nano-cellulose yield were investigated by single-factor tests. The preliminary results showed that the optimal conditions were: acid hydrolysis temperature at 40; sulfuric acid concentration at 60%; hydrolysis time at 90 min; liquid to material ratio at 12:1. The results of single-factor tests showed that the nano-crystalline cellulose (NCC) yield was maximized to 26.72% at the acid hydrolysis temperature 40. The yield of NCC was maximized to 29.89% at the sulfuric acid concentration of 60%, to 30.09% at the acid hydrolysis time of 90 min, or to 25.33% at the liquid to material of 12:1. Based on the single-factor test, the process parameters were optimized by a response surface method. A quadratic polynomial model was built, and then its effectiveness and the interactions between different factors were analyzed. Also the microstructure of the nano-cellulose as-prepared was investigated by transmission electron microscopy (TEM), particle size distribution, Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). Results showed that the importance degrees of all factors on yield of NCC rank as follows: Acid hydrolysis temperature acid hydrolysis time liquid to material sulfuric acid concentration. The optimal process conditions were as follows: acid hydrolysis temperature at 42, acid hydrolysis time at 83.71 min, sulfuric acid concentration at 59.97%, and liquid to material ratio at 12.33:1. Under these conditions, the highest yield of NCC was 31.67%, which was validated to be 31.31%. SEM and particle size distribution analysis showed that the NCC from shells of sunflower seeds was rod-like and partially aggregated. The diameter was measured to be 10-30 nm, and length was 150-300 nm. FT-IR showed that NCC still possessed the basic chemical structure of cellulose and did not have functional group variation. XRD showed that NCC possess a typical cellulose I crystal structure and their crystallinity degree was obviously higher the crystallinity degree. This study provided some reference for the comprehensive utilization of sunflower seeds. , 2015, Chinese Society of Agricultural Engineering. All right reserved.
文章类型	期刊论文
收录类别	EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/56341
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Chen, S.,H. Tao,Y. Wang,et al. Process optimization of nanocrystalline cellulose from sunflower seed hull and its characterization[J]. Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering,2015,31(15):302-308.
APA	Chen, S.,H. Tao,Y. Wang,&Z. Ma and L. Zhang.(2015).Process optimization of nanocrystalline cellulose from sunflower seed hull and its characterization.Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering,31(15),302-308.
MLA	Chen, S.,et al."Process optimization of nanocrystalline cellulose from sunflower seed hull and its characterization".Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering 31.15(2015):302-308.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
葵花籽壳纳米纤维素制备工艺优化及其表征.（1306KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览请求全文