Insights into the effects of gamma-irradiation on the microstructure, thermal stability and irradiation-derived degradation components of microcrystalline cellulose (MCC)

doi:10.1039/c5ra03300d

	Insights into the effects of gamma-irradiation on the microstructure, thermal stability and irradiation-derived degradation components of microcrystalline cellulose (MCC)
	Liu, Yun 1; Chen, Jingping 2; Wu, Xiaofeng 3; Wang, Keqin 3; Su, Xiaojun 4; Chen, Liang 3; Zhou, Hua 1; Xiong, Xingyao 4,5
刊名	RSC ADVANCES
	2015
卷号	5 期号:43 页码:34353-34363
ISSN号	2046-2069
DOI	10.1039/c5ra03300d
通讯作者	Liu, Yun
英文摘要	It has been demonstrated that radiation pretreatment can cause a significant breakdown of the stubborn cellulose structure, which will increase the accessibility of cellulose and enhance enzyme hydrolysis in bio-fuel processes. In this study, using microcrystalline cellulose (MCC) as a model substrate, the impacts of irradiation dose on the microstructure, thermal stability and irradiated-degradation components of cellulose under Co-60 gamma-irradiation (0-1400 kGy) was comprehensively investigated. FT-IR, EPR and NMR analyses show that irradiation destroys the glycosidic bond and inter- and intra-molecular hydrogen bond of cellulose, resulting in the generation of reductive carbonyl groups and free radicals. SEM, XRD and GPC analyses confirm that irradiation can damage the crystalline microstructure and surface morphology of MCC, which reduces its degree of polymerization from 183 045 kDa to 4413 kDa. TGA and DGA curves indicate that the activated energy (E-a) and thermal stability of treated MCC decrease with the increasing irradiation dose. Ion chromatography (IC) analysis demonstrates that there exist fermentation sugars such as glucose (10.73 mg g(-1)), xylose (1.58 mg g(-1)), arabinose (0.46 mg g(-1)), fructose (4.31 mg g(-1)), and cellobiose (1.90 mg g(-1)) as well as low amounts of glucuronic acid (0.35 mg g(-1)) and galacturonic acid (1.46 mg g(-1)) in the irradiation-derived degradation components. Therefore, the findings in this study suggest that gamma-irradiation processing is an environment-friendly, promising and effective approach to treat lignocellulose biomass.
学科主题	Chemistry, Multidisciplinary
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000353167500079
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/100938]
专题	蔬菜花卉研究所_马铃薯研究室
作者单位	1.Beijing Univ Chem Technol, Coll Life Sci & Technol, Beijing Key Lab Bioproc, Beijing 100029, Peoples R China 2.Hunan Acad Agr Sci, Biotechnol Res Ctr, Changsha 410125, Hunan, Peoples R China 3.Hunan Acad Agr Sci, Hunan Collaborat Utilizat Bot Funct Ingredients, Hunan Inst Nucl Agr Sci & Space Breeding, Changsha 410125, Hunan, Peoples R China 4.Hunan Agr Univ, Hunan Prov Key Lab Crop Germplasm Innovat & Utili, Changsha 410128, Hunan, Peoples R China 5.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yun,Chen, Jingping,Wu, Xiaofeng,et al. Insights into the effects of gamma-irradiation on the microstructure, thermal stability and irradiation-derived degradation components of microcrystalline cellulose (MCC)[J]. RSC ADVANCES,2015,5(43):34353-34363.
APA	Liu, Yun.,Chen, Jingping.,Wu, Xiaofeng.,Wang, Keqin.,Su, Xiaojun.,...&Xiong, Xingyao.(2015).Insights into the effects of gamma-irradiation on the microstructure, thermal stability and irradiation-derived degradation components of microcrystalline cellulose (MCC).RSC ADVANCES,5(43),34353-34363.
MLA	Liu, Yun,et al."Insights into the effects of gamma-irradiation on the microstructure, thermal stability and irradiation-derived degradation components of microcrystalline cellulose (MCC)".RSC ADVANCES 5.43(2015):34353-34363.