Synthesis of a novel antimicrobial-modified starch and its adsorption on cellulose fibers: part II––adsorption behaviors of cationic starch on cellulose fibers

Cellulose ◽  
2008 ◽  
Vol 15 (4) ◽  
pp. 619-629 ◽  
Author(s):  
Y. Guan ◽  
L. Qian ◽  
H. Xiao ◽  
A. Zheng ◽  
B. He
Keyword(s):  
Cellulose Fibers ◽  
Modified Starch ◽  
Cationic Starch ◽  
Adsorption Behaviors

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.

The Preparation of Mica Composite Insulation Material with Starch Adhesive and its Modified Enhancement

2011 ◽  
Vol 328-330 ◽  
pp. 1259-1262
Author(s):  
Yu Peng Qian ◽  
Xiao Wei Zhang ◽  
Ying Bo Zhu
Keyword(s):  
Flexural Strength ◽  
Coupling Agent ◽  
High Performance ◽  
Dielectric Strength ◽  
Soluble Starch ◽  
Silicone Resin ◽  
Modified Starch ◽  
Insulation Material ◽  
Cationic Starch ◽  
Mica Composite

Silicone resin is the mainly adhesive in mica insulation industry, and this sort of adhesive is easy to produce toxic and harmful volatile organic compounds and causing the environment pollution. Under the premise of no decrease in insulation performance of the mica composite insulation material, the environmental friendly modified starch adhesive is chosen. In order to obtain the high performance composite materials, the improvement of its flexural strength is necessary, and the method of modification is introduced. Four kinds of modified starch, such as: maize soluble starch, oxidized starch, β-dextrin and cationic starch are discussed. The cationic starch is avaliable as the bond medium and the silicone coupling agent KH-550 is used for modified enhancement. When the dosage of the cationic starch is 10% and modified 30mins by silicone coupling agent KH-550 with the concentration of 1%, the flexural strength and dielectric strength of the mica composite insulation material can reach 248.5 N/mm2and 23.16 KV/mm respectively.

Adsorption Behaviors of Acid Dyes by Water-Insoluble Crosslinked Cationic Starch

2014 ◽  
Vol 522-524 ◽  
pp. 552-559
Author(s):  
Min Zhang ◽  
Ben Zhi Ju ◽  
Shu Fen Zhang ◽  
Xue Zhang ◽  
Zhi Hua Cui
Keyword(s):  
Adsorption Capacity ◽  
Acid Dyes ◽  
Cationic Starch ◽  
Order Model ◽  
Dry Process ◽  
Adsorption Behaviors ◽  
Initial Ph ◽  
Pseudo Second Order ◽  
Acid Red 1 ◽  
Kinetics Of

This paper presents a study on the adsorption of structurally different C.I. Acid Red 1(AR-1) and C.I. Acid Yellow 4(AY-4) from aqueous solution by a series water-insoluble crosslinked cationic starches with different degrees of substitution (DS) synthesized by a dry process. The adsorption quickly establish equilibrium within 15 min. The effective adsorption took place at the initial pH of 2-10 and pH of 2-8 for AR-1 and AY-4, respectively. The adsorption capacity of the two acid dyes increased with the increasing of DS of the crosslinked cationic starches. The adsorption capacity of AY-4 was almost two times higher than that of AR-1 under the present conditions. It was found that the adsorption kinetics of the two acid dyes on the crosslinked cationic starch was well described with the pseudo-second-order model (R2>0.99). Further, the Langmuir isotherm agreed well with the experimental data (R2>0.99). Besides, the thermodynamic parameters are shown.

scholarly journals PATI TERMODIFIKASI ENZIMATIS SEBAGAI KOMPONEN PEREKAT BAHAN SALUT KERTAS CETAK

2016 ◽  
Vol 2 (01) ◽  
Author(s):  
Nina Elyani ◽  
Jenni Rismijana ◽  
Teddy Kardiansyah ◽  
Cucu ,
Keyword(s):  
Kraft Pulp ◽  
Paper Industry ◽  
Dry Weight ◽  
Modified Starch ◽  
Cationic Starch ◽  
Water Penetration ◽  
Paper Properties ◽  
Bleached Kraft Pulp ◽  
Base Paper ◽  
Printing Paper

This research has been conducted through several steps. Step I was base papermaking using 80% LBKP and 20 % NBKP. They were refine separately up to 300 ml CSF, then mixed with 15% CaCO3, 0.6% AKD, 0.5% poliacrylamide, and 1,5% cationic starch to dry-weight of fibers. Step II was modifying starch enzymaticaly at 70-75°C, pH 6.5 - 7.0, amylase 0,05% for 15 minutes. Step III was base-paper coating with varied adhesives. Variation I use natural starch, Variation II use enzymatic modified starch, Variation III use commercial starch each of 8%. Testing for the handsheets comprise of brightness, roughtness, picking strength, water penetration, and pH. The results showed that the viscosity for natural starch, enzymatic starch and commercial starch respectively at 8000 cPs, 26 cPs and 114 cPs. The use of enzymatic modified starch give the best paper properties. The experiments has replicated in a laboratory of paper industry, with the same results, using clay and CaCO3 at 40:60 ratio, enzymatic starch, commercial starch, and natural starch.Keywords: starch, coated printing paper, amylase, viscosity.  ABSTRAK Penelitian ini dilakukan melalui beberapa tahapan. Tahap I adalah pembuatan kertas dasar dengan menggunakan bahan baku 80% serat pendek atau leaf bleached kraft pulp (LBKP) dan 20% serat panjang atau needle bleached kraft pulp ( NBKP) digiling secara terpisah hingga mencapai derajat giling 300 ml CSF. Selanjutnya pulp dicampur ke dalam bahan kimia yang terdiri 15 % CaCO3, 0,6% AKD, 1,5% pati kationik dan Poliakrilamida sebesar 0,5% terhadap berat kering pulp. Lembaran dibuat pada gramatur 60 g/m2. Tahap II adalah pembuatan pati termodifikasi enzimatis pada kondisi inkubasi suhu sekitar 70 – 75oC, pH : 6,5 – 7,0, waktu selama 15 menit dengan penambahan amilase sebesar 0,05%. Tahap III adalah proses penyalutan kertas dasar dengan pati termodifikasi enzimatis, sebagai pembanding menggunakan pati alam maupun pati komersial. Kemudian dilakukan pengujian terhadap lembaran yang dihasilkan meliputi : derajat putih, kekasaran, penetrasi minyak, ketahanan cabut, daya serap air dan pH. Selanjutnya dilakukan uji coba di industri dengan komposisi pigmen kaolin dan kalsium karbonat 40 : 60 menggunakan pati enzim, pati komersial, dan pati alam. Hasil percobaan menunjukkan bahwa viskositas untuk pati alam, pati enzim dan pati komersial masing-masing adalah sebasar 8000 cPs, 26 cPs dan 114 cPs. Penggunaan pati modifikasi enzim memberikan sifat kertas yang paling baik. Hasil replikasi percobaan di laboratorium industri, pati enzim juga menghasilkan sifat kertas yang lebih baik.Kata kunci: pati, kertas cetak salut, amilase, viskositas.  

Study on AKD Improves Regenerated Paper Fiber Properties

2011 ◽  
Vol 332-334 ◽  
pp. 1872-1875 ◽  
Author(s):  
Quan Xiao Liu ◽  
Wen Cai Xu ◽  
Yu Bin Lv
Keyword(s):  
Ph Value ◽  
Pulp Fiber ◽  
Modified Starch ◽  
Paper Pulp ◽  
Cationic Starch ◽  
Surface Strength ◽  
Paper Surface ◽  
Fiber Properties ◽  
Amphoteric Starch ◽  
Better Than

AKD is an important internal size for paper pulp fiber. With recycled economy development, regenerated paper fiber becomes an important resource. In this paper, AKD is used as a modification aid by internal sizing method. It shows that the change of the dosage of AKD influences regenerated paper fiber Cobb value, but has no influence to paper surface strength. The proper pH value is from 7 to 9. The temperature has no influence to regenerated paper fiber Cobb value and paper surface strength. Appropriate modified starch is good for AKD modification fiber and increase of the surface strength of paper made from modified fiber by AKD. Amphoteric starch is better than cationic starch. Other added substances such as PEI, MPEI and PAE can improve the modification of paper fiber modified by AKD. So the adsorption of modified paper fiber decrease and the surface strength of paper modified fiber increase.

Adsorption of Cr(VI) onto the Cross-Linked Cationic Starch and the Establishment of the Adsorption Isotherm and Kinetic Equation

2012 ◽  
Vol 518-523 ◽  
pp. 285-288
Author(s):  
Yuan Dong Xu ◽  
Xiang Yang Yan
Keyword(s):  
Kinetic Equation ◽  
Adsorption Isotherm ◽  
Equilibrium State ◽  
Modified Starch ◽  
Trimethyl Ammonium Chloride ◽  
Cationic Starch ◽  
Adsorption Time ◽  
Adsorption Performance ◽  
The Cross ◽  
Cationic Reagent

Glycidyl trimethyl ammonium chloride (GTA) has been synthesized and used as cross-linked cationic reagent to prepare modified starch. The adsorption behavior of Cr(VI) onto the cross-linked cationic starch was studied systematically. The adsorption time and the temperature took great effects on the adsorption performance of the adsorbent. After a suitable time the adsorption could reach an equilibrium state and the adsorption capacity increased with the decrease of the temperature. The adsorption isotherm and the kinetic equation were established and they fit well with the Freundlich and Lagergren models, respectively. The used adsorbent was regenerated with acid medium and the recycling of the regenerated adsorbent has also been investigated.

A Study in the Adsorption Behaviors of Cr (VI) on Crosslinked Amphoteric Starches Synthesized through Using the Microwave Radiation Method

2009 ◽  
Vol 87-88 ◽  
pp. 387-392 ◽  
Author(s):  
Li Xia Zou ◽  
Qing Cheng Liu ◽  
Qiong Xu ◽  
Jing Hua Rong
Keyword(s):  
Adsorption Capacity ◽  
Microwave Radiation ◽  
Quaternary Ammonium ◽  
Langmuir Isotherm ◽  
Degree Of Substitution ◽  
Modified Starch ◽  
Radiation Method ◽  
Adsorption Behaviors ◽  
Anionic Groups ◽  
Microwave Radiation Method

Crosslinked amphoteric starches (CAS) with quaternary ammonium cationic and carboxymethyl anionic groups were prepared by a microwave radiation method. Their adsorption behavior for Cr(VI) was investigated. The results showed that high the degree of substitution (DS) of modified starch was favorable to the synthesis by the microwave heating and crosslinked amphoteric starches prepared with higher the adsorption capacity than by the drying reaction. The adsorption capacity increases with the increasing cationic groups and decreased with increasing degree of substitution of anionic groups. The adsorption capacity was found to follow the Langmuir isotherm.

Silicification of wood-cell walls

1994 ◽  
Vol 52 ◽  
pp. 428-429
Author(s):  
S. E. Keckler ◽  
D. M. Dabbs ◽  
N. Yao ◽  
I. A. Aksay
Keyword(s):  
Electron Microscopy ◽  
Cell Wall ◽  
Cell Walls ◽  
Lignin Content ◽  
Resin Composite ◽  
Middle Lamella ◽  
Cellulose Fibers ◽  
Complex Structures ◽  
Rich Region ◽  
Inorganic Precursors

Cellular organic structures such as wood can be used as scaffolds for the synthesis of complex structures of organic/ceramic nanocomposites. The wood cell is a fiber-reinforced resin composite of cellulose fibers in a lignin matrix. A single cell wall, containing several layers of different fiber orientations and lignin content, is separated from its neighboring wall by the middle lamella, a lignin-rich region. In order to achieve total mineralization, deposition on and in the cell wall must be achieved. Geological fossilization of wood occurs as permineralization (filling the void spaces with mineral) and petrifaction (mineralizing the cell wall as the organic component decays) through infiltration of wood with inorganics after growth. Conversely, living plants can incorporate inorganics into their cells and in some cases into the cell walls during growth. In a recent study, we mimicked geological fossilization by infiltrating inorganic precursors into wood cells in order to enhance the properties of wood. In the current work, we use electron microscopy to examine the structure of silica formed in the cell walls after infiltration of tetraethoxysilane (TEOS).

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