Phthalate debranched Canna edulis Ker starch with high degree of substitution: preparation, characterization and property

2021 ◽  
Author(s):  
Tang Hongbo ◽  
Zhao Qian ◽  
Li Yanping ◽  
Liu Xiaojun
Keyword(s):  
Degree Of Substitution ◽  
High Degree

Preparation and Characterization of Carboxymethyl Cellulose with a High Degree of Substitution from Agricultural Wastes

2019 ◽  
Vol 20 (5) ◽  
pp. 933-943 ◽  
Author(s):  
Ibtissem Moussa ◽  
Ramzi Khiari ◽  
Ali Moussa ◽  
Mohamed Naceur Belgacem ◽  
Mohamed Farouk Mhenni
Keyword(s):  
Carboxymethyl Cellulose ◽  
Agricultural Wastes ◽  
Degree Of Substitution ◽  
High Degree

Research on Application of High Degree of Substitution Cationic Starch in Paper Coating

2011 ◽  
Vol 287-290 ◽  
pp. 2074-2077
Author(s):  
Quan Xiao Liu ◽  
Jin Li Li ◽  
Wen Cai Xu ◽  
Yu Bin Lv
Keyword(s):  
Degree Of Substitution ◽  
Cationic Starch ◽  
Paper Coating ◽  
Coated Paper ◽  
Paper Properties ◽  
Color Density ◽  
Image Density ◽  
Research On Application ◽  
High Degree ◽  
Better Than

Different degrees of high degree of substitution cationic starch (HCS) were prepared and applied in paper coating. Effects of HCS on coating properties and coated paper properties were investigated, and the comparison of effects of HCS and PDMDAAC was made. The results show that the best amount of HCS in coating formula is between 2% and 4%. When the amount of HCS is 4%, whiteness of coated paper was the highest. The color density was the highest when the amount of HCS is about 4% and the degree of substitution is 0.64. HCS with degree of substitution 0.849 is better than PDMDAAC in some respects, and the print image density achieved satisfactorily.

Research and Application of Retention Agent in Reversible Thermochromism Materials Papermaking

2015 ◽  
Vol 731 ◽  
pp. 452-456
Author(s):  
Xiao Xiu Hao ◽  
Na Wei ◽  
Cheng Sun ◽  
Shu Hui Yang
Keyword(s):  
Retention Rate ◽  
Degree Of Substitution ◽  
Experimental Results ◽  
Pulp Fiber ◽  
Modified Starch ◽  
Cationic Starch ◽  
Optimum Dosage ◽  
Reversible Thermochromism ◽  
High Degree

This paper discusses the effects of different retention agent such as: CPAM, APAM, PAE+CPAM, cationic starch with high degree of substitution and modified starch on the reversible thermochromism materials in anti-counterfeiting paper retention rate, and then determined the optimum dosage of retention agent in the slurry. According to the anti-counterfeit paper color value, the mechanism of reversible thermochromism paper was studied. The experimental results show that when the slurry with retention agent, the reversible thermochromism materials in the anti-counterfeit paper retention increased significantly. This suggests that retention agent in pulp fiber has played the role of bridge and link, thus ensuring the security of reversible thermochromism paper.

Preparation of carboxymethylcellulose sulfate of high degree of substitution

1995 ◽  
Vol 266 (2) ◽  
pp. 315-320 ◽  
Author(s):  
Sebastian Vogt ◽  
Thomas Heinze ◽  
Kerstin Röttig ◽  
Dieter Klemm
Keyword(s):  
Degree Of Substitution ◽  
High Degree

The precipitation of proteins by carboxymethyl cellulose

1975 ◽  
Vol 42 (2) ◽  
pp. 267-275 ◽  
Author(s):  
J. G. Zadow ◽  
R. D. Hill
Keyword(s):  
Ionic Strength ◽  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Carboxymethyl Cellulose ◽  
Degree Of Substitution ◽  
Maximum Precipitation ◽  
Ph Range ◽  
High Degree ◽  
Β Lactoglobulin

SummaryCarboxymethyl cellulose (CMC) formed insoluble complexes with β-lactoglobulin, bovine serum albumin and Na caseinate. Maximum precipitation of the β-lactoglobulin-CMC complex occurred at pH 3·2, whereas maximum precipitation of the bovine serum albumin-CMC complex and the Na caseinate-CMC complex occurred at pH 2·8. The ratio of CMC to protein for maximum precipitation depended on the protein, being greatest for Na caseinate and least for bovine serum albumin. The percentage of protein precipitated by CMC decreased with increasing ionic strength of the solution, the rate of decrease being least for bovine serum albumin. At a given ionic strength, more protein was precipitated by CMC of high degree of substitution than by CMC of low degree of substitution. The change in pH (ΔpH) occurring on mixing CMC and unbuffered protein solutions, each initially at the same pH, was measured. ΔpH was negative for β-lactoglobulin-CMC mixtures over the pH range 7–2 (minimum at pH 5·5). For bovine serum albumin-CMC and Na caseinate-CMC mixtures, ΔpH was positive between pH 7 and 3·2 (maximum at pH 4·5), zero at pH 3·2 and negative between pH 3·2 and 2·0 (minimum at pH 2·8).

Synthesis of Carboxymethyl Starch with High Degree of Substitution by a Modified Dry Process

2011 ◽  
Vol 233-235 ◽  
pp. 306-310 ◽  
Author(s):  
Si Fang Li ◽  
Jean Marie Vianney Mujyambere ◽  
Miao Liu
Keyword(s):  
Electron Microscopy ◽  
Potato Starch ◽  
Degree Of Substitution ◽  
Molar Ratio ◽  
Temperature Reaction ◽  
Dry Process ◽  
Carboxymethyl Starch ◽  
Infrared Spectrophotometer ◽  
High Degree ◽  
Scanning Electron

Granular carboxymethyl starch (CMS) with high degree of substitution (DS) was synthesized using a modified dry process. The carboxymethylation reaction was carried out with granular potato starch, solid NaOH and sodium monochloroacetate (SMCA). The effects of reaction temperature, reaction time, molar ratio of NaOH and SMCA to starch on the degree of substitution (DS) and the reaction efficiency (RE) of CMS were investigated. High DS up to 0.78 was obtained for reaction at 323 K for 6 h with molar ratio of NaOH and SMCA to starch being 2:2:1. CMS was characterized by Fourier transform infrared spectrophotometer and scanning electron microscopy.

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