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Effect of SBA-15-CEO on properties of potato starch film modified by low-temperature plasma

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Food Bioscience 2023年第1期51卷 1128-1138页

作者： Yanli Guo Meng Cheng Yingjun Cui Rongfei Zhang Zitong Zhao Xiangyou Wang Shuaiyu Guo School of Agricultural Engineering and Food Science Shandong University of TechnologyZibo255000China

In order to improve the properties of potato starch film,cinnamon essential oil(CEO)encapsulated with mesoporous nano-silica(SBA-15)was added to the film and the potato starch dispersion was modified by lowtemperature plasma(LTP).The effects of SBA-15-CEO on the physical,mechanical,antioxidant and antifungal properties of the film were *** revealed that the addition of SBA-15-CEO significantly improved the film *** water vapor transmission rate(WVTR)decreased from 14.01g/(m^(2)·h)to 12.75g/(m^(2)·h)with increasing concentrations of *** 0.4 g/100 mL SBA-15-CEO was added,the oxygen transmittance rate(OTR)decreased from 8.113×10^(-15)cm^(2)s^(-1)Pa^(-1)to 3.017×10^(-15)cm^(2)s^(-1)Pa^(-1).The tensile strength(TS)and elongation at break(EB)reached maximum values when the dosage of SBA-15-CEO was 0.4 g/100 *** zeta potential(ZP)of the colloid solutions initially decreased and subsequently increased,corresponding to a minimum colloid solution ZP(0.947 mV)at 0.4 g/100 mL SBA-15-CEO,and a maximum(2.55 mV)at 0.8 g/100 mL ***,the films with SBA-15-CEO exhibited antifungal and antioxidant ***,the aggregation of SBA-15-CEO decreased with the addition of 0.4 g/100 mL,and the appearance of irregular and rough fractured surfaces were also *** transform infrared(FTIR)spectroscopy revealed SBA-15-CEO to increase the hydrogen bonding of the *** work proved the potential of LTP-PS/SBA-15-CEO(i.e.,potato starch/SBA-15-CEO film modified by LTP)as an antioxidant and antifungal packaging material.

关键词： SBA-15-CEO potato starch Low-temperature plasma Film Modification

Preparation of starch esters with crosslinking structures derived from dianhydride

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Frontiers of Chemical Science and Engineering 2011年第1期5卷 51-54页

作者： Huijuan CHU Hongliang WEI Jing ZHU Shouyin HU School of Chemistry and Chemical Engineering Henan University of TechnologyZhengzhou 450001China

starch is a kind of natural polymer used in many industrial fields because of its low cost,availability and *** starch was modified by esterification with pyromellitic dianhydride,and the products were obtained with crosslinking *** experiments showed that reactive temperature was the primary influencing *** product prepared at 40℃ for 3 h with the mass ratio of starch and dianhydride of 16∶1 and pH value of 7.5 exhibited a degree of substitution of 11%.FTIR and UV analysis verified the formation of starch esters.

关键词： potato starch pyromellitic dianhydride esterification crosslink

PREPARATION AND SWELLING PROPERTIES OF SUPER-ABSORBENT POLYMER

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Chinese Journal of Polymer Science 1996年第1期14卷 48-56页

作者：柳明珠程镕时吴靖嘉 Department of Chemistry Nanjing University Nanjing 210093 Department of Chemistry Lanzhou University Lanzhou 730000

A super-absorbent polymer is prepared by graft polymerizing acrylamide (AM) onto potato starch using eerie ammonium nitrate (CAN) and N, N'-methylene-bis-acrylamide (bisAM) as an initiator and cross-linking agent respectively, and then subjecting the potato starch- poly(acrylamide) (PAM) graft copolymer (SPAM) to alkaline saponification. The water absorbency (WA) of the sample is nearly 5000 g H2O/g for dry sample in 24 h at room temperature and is far larger than that of reported in the literature([1]). The variables affecting the WA were investigated and optimiz;ed, they were: concentrations of potato starch, AM, CAN and bisAM were 26.3 g/L, 1.14 mol/L, 10.3 mmol/L and 0.53 mmol/L, respectively. The amount of sodium hydroxide was 15 g and the temperatures of graft copolymerization and saponification reactions were 60 degrees C and 95 degrees C. The time of graft copolymerization and saponification reactions was 2 h, respectively.

关键词： graft copolymer super-absorbent polymer potato starch acrylamide

Dual confinement of polysulfides in boron-doped porous carbon sphere/graphene hybrid for advanced Li-S batteries

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Nano Research 2018年第9期11卷 4562-4573页

作者： Wei Ai Jiewei Li Zhuzhu Du Chenji Zou Hongfang Du Xin Xu Yu Chen Hongbo Zhang Jianfeng Zhao Changming Li Wei Huang Ting Yu Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University (NanjingTech) 30 South Puzhu Road Nanjing 211816 China Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 50 Nanyang Avenue Singapore 637371 Singapore Shaanxi Institute of Flexible Electronics (SIFE) Northwestern Polytechnical University (NPU) 127 West Youyi Road Xran 710072 China Institute for Clean Energy & Advanced Materials Southwest University Chongqing 400715 China

A hybrid structure consisting of boron-doped porous carbon spheres and graphene （BPCS-G） has been designed and synthesized toward solving the polysulfide- shuttle problem, which is the most critical issue of current Li-S batteries. The proposed hybrid structure showing high surface area （870 m^2.g^-1） and high B-dopant content （6.51 wt.%） simultaneously offers both physical confinement and chemical absorption of polysulfides. On one hand, the abundant-pore structure ensures high sulfur loading, facilitates fast charge transfer, and restrains polysulfide migration during cycling. On the other hand, our density functional theory calculations demonstrate that the B dopant is capable of chemically binding polysulfides. As a consequence of such dual polysulfide confinement, the BPCS-G/S cathode prepared with 70 wt.% sulfur loading presents a high reversible capacity of 1,174 mAh.g^-1 at 0.02 C, a high rate capacity of 396 mAh·g^-1 at 5 G and good cyclability over 500 cycles with only 0.05% capacity decay per cycle. The present work provides an efficient and cost-effective platform for the scalable synthesis of high-performance carbon-based materials for advanced Li-S batteries.

关键词： potato starch carbon spheres graphene boron doping Li-S batteries

超高压及酶解条件下马铃薯淀粉结构及物化特性的研究

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超高压及酶解条件下马铃薯淀粉结构及物化特性的研究

作者： Leyla Raad 中国农业科学院

学位级别：硕士

中国是世界上马铃薯产量最大的国家之一,马铃薯产量占全世界马铃薯总产量的1/3。马铃薯淀粉具有较好的物理性质,相比于其他来源的淀粉具有更大的竞争优势。然而,马铃薯原淀粉存在的缺陷又限制了其在食品中工业中的应用。本研究的目的在... 详细信息

中国是世界上马铃薯产量最大的国家之一,马铃薯产量占全世界马铃薯总产量的1/3。马铃薯淀粉具有较好的物理性质,相比于其他来源的淀粉具有更大的竞争优势。然而,马铃薯原淀粉存在的缺陷又限制了其在食品中工业中的应用。本研究的目的在于通过新颖且实用的超高压(200MPa,300MPa,400MPa和600MPa)作用及α-淀粉酶(酶浓度为0.02%,0.04%和0.06%,w/v)和普鲁兰酶(酶浓度为40,160和320 U/g)对淀粉进行改性,以提高和改善马铃薯淀粉的理化性质。研究了25℃时,200,400和600MP的压力下,不同浓度α-淀粉酶(0.02%,0.04%和0.06%,w/v)对马铃薯淀粉结构及理化性质的影响。以及60℃时,HHP结合普鲁兰酶处理(压力为200,300和400MPa;酶浓度为40,160和320 U/g)对马铃薯淀粉结构及理化性质的影响。此外还测定了HHP结合α-淀粉酶处理对马铃薯淀粉晶体结构及理化性质的影响。结果表明,超高压处理后水解的淀粉在600MPa压力处理后,添加浓度为0.06%的α-淀粉酶,淀粉的水解程度以及还原糖含量明显高于添加浓度为0.04%和0.02%的α-淀粉酶时的测定结果。原马铃薯淀粉(NPS)颗粒呈球形和椭球形,表面光滑,而水解的NPS和水解的600MPa处理的淀粉颗粒破裂,形状不规则,表面有裂痕和孔洞。与超高压处理相比,超高压处理后再进行浓度为0.06%的α-淀粉酶水解处理显著降低了颗粒的平均粒径,从29.43±0.10μm降低至20.03±0.16μm。除600MPa处理的马铃薯淀粉外,随酶浓度的升高和压力的增大(由200增大至600MPa),马铃薯淀粉的膨胀势降低,溶解度升高。傅里叶红外变换光谱的测定结果显示,淀粉的定形区和无定形区都发生了大量降解,尤其是600MPa处理后再进行α-淀粉酶水解处理的马铃薯淀粉。600MPa结合0.06%(w/v)α-淀粉酶水解处理的淀粉,在2θ=19.36°处出现新的峰,意味着马铃薯淀粉由B-结晶型转变为B+V型,并且显示出最低的起始、终止糊化温度,以及焓值。这些结果显示,先进行HHP预处理,提高了马铃薯淀粉颗粒对酶解作用的敏感性,并最终改变了淀粉的晶体结构和无定形结构。60-C时超高压结合普鲁兰酶处理的淀粉可以改变马铃薯淀粉的结晶区和无定形区。400MPa,普鲁兰酶浓度为320U/g时处理的淀粉还原糖含量的测定结果显示,其水解程度最高。HHP处理降低了衍射峰的锐度,而HHP结合普鲁兰酶处理的淀粉却观察到了相反的趋势,随着酶浓度的升高及淀粉颗粒的重结晶作用,淀粉的晶体结构发生了改变,衍射类型由B-型转变为C-型转化。25℃下,超高压结合α-淀粉酶改性淀粉的一些物理化学性质以及形态特性发生了一些改变。DSC结果显示,超高压结合α-淀粉酶处理不能够使结晶区完全水解,此外,X-射线衍射分析表明,X衍射图谱并未发生较大变化,但不同处理改性淀粉衍射峰的强度显著降低,这归结于结晶结构的部分破坏。

关键词： potato starch Physico-chemical properties Enzyme treatment High pressure treatment