• 제목/요약/키워드: cationic starch

검색결과 60건 처리시간 0.02초

Effect of Chitosan Addition on the Surface Properties of Kenaf (Hibiscus cannabinus) Paper

  • Ashori Alireza;Raverty Warwick D.;Harun Jalaluddin
    • Fibers and Polymers
    • /
    • 제6권2호
    • /
    • pp.174-179
    • /
    • 2005
  • The present paper studies the effect of chitosan, cationic starch and polyvinyl alcohol (PVA) as sizing agents to enhance surface properties of kenaf paper. The polymers were incorporated into the sheets by spray application. The results clearly showed that the addition of chitosan to a sheet formed from beaten fibers had excellent improvement in surface properties, compared to the effect of other additives. Sizing quality of cationic starch fairly matched with the sizing quality of chitosan, however, it was able to reduce the water absorption potential of paper more than chitosan at a same concentration. In most other properties, particularly the most important property for printing papers, surface smoothness, chitosan-sized papers are superior to the paper sized with cationic starch or PVA.

Effects of the Surface Chemical Properties of Silica Sols on the Retention and Drainage of Microparticles Systems

  • Min, Choon-Ki
    • 펄프종이기술
    • /
    • 제32권1호
    • /
    • pp.26-32
    • /
    • 2000
  • The impact of major surface chemical properties of silica sols on the retention and drainage performance of the silica based micrparticle system, Compozil was investigated using four different silica sols. And the effect of silica properties on the interactions with cationic starch and cationic plyacrylamide has also been identified. The surface charge density and the stability over pH of silica sols were increased by introducing aluminosilicate anions at surface. It was found that the charge density of silica sols determined the addition level necessary to attain the maximum retention and drainage. When silica sols were combined with cationic starch, the change density of the product was the critical properties and the degree of microagregation was of minor importance. In the cationic polyacrylamide system the degree of colloid structure appeared to be a more critcial property than the charge density of silica sols.

  • PDF

전분의 양성화 개질을 통한 음이온성 $SiO_2$ 표면에서의 흡착 특성 연구 (Studies of Adsorption on the Anionic Surface of $SiO_2$ by Cationic Modified Starches)

  • 한동성;김유미;김한영;지경엽;조인식;김종득
    • 공업화학
    • /
    • 제24권1호
    • /
    • pp.24-30
    • /
    • 2013
  • Quartz crystal microbalance with dissipation monitoring (QCM-D)을 활용하여 양이온성으로 치환된 전분 및 올리고당의 흡착특성을 연구하였다. 전 합성계열의 흡착량은 양이온 계면활성제($C_{12{\sim}16}$ trimethylammonium bromide) 대비 높은 흡착량을 보였으며, 치환비율 및 분자량에 따른 특별한 흡착량의 경향성은 관찰되지 않았다. 반면에, 점탄성(viscoelasticity) 측면에서는 분자량이 증가될수록 흡착층의 강도가 증가되는 경향이 관찰되었다. 흡착 및 탈착실험에서 단분자인 양이온성 계면활성제의 흡착량의 차이는 약 4~9배에 수준의 큰 차이가 발생되었으나 양성치환된 전분계열에서는 0~50% 수준의 작은 차이를 나타내었다. 또한, 탈착단계 이후 흡착단계에 비해 양이온 계면활성제에서는 흡착층의 강도 (rigidity)가 감소된 반면 양성치환된 전분계열에서는 강도가 증가되는 상반된 경향이 관찰되었다.

제지용 전분을 이용한 문화재 보존용 기능성 풀 개발 (제1보) - 풀의 종류에 따른 접착 특성 - (Development of Glue for Artifact Conservation Using Papermaking Starch (Part 1) - The Nature and Adhesive Strength of Glues -)

  • 이선조;최태호
    • 펄프종이기술
    • /
    • 제46권4호
    • /
    • pp.44-53
    • /
    • 2014
  • This research were aimed at developing starches which have high preservability and high bonding strength from corn starch, modified cationic and oxidized corn starches, as compared to the fermented wheat starch. On the lining that attaching the base paper on the back of the work with paste, the coating weight was determined by the solid contents of the paste rather than the viscosity of paste. Adhesive strength and stiffness were also determined by the solid contents of the paste. Corn starch had lower solid contents, higher viscosity, and higher adhesive strength than other starches. In the iodine stain to the surface of peeled base paper off, paste deeply penetrated into the traditional Hanji than modern Hanji. And oxidized starch paste deeply penetrated into the paper layer than the cationic starch.

지류 문화재 보존처리용 전분계 풀의 특성 (제1보) - 전분의 종류에 따른 접착 특성 - (Characteristics of Starch Paste for Conservation of Paper Properties (Part 1) - The Nature and Adhesive Strength of Starch Paste -)

  • 양은정;조경실;최태호
    • 펄프종이기술
    • /
    • 제45권4호
    • /
    • pp.52-64
    • /
    • 2013
  • This study was carried out to investigate the characteristics of starch paste which was used for the conservation of paper properties. Three kinds of commercial corn starch and five kinds of fermented wheat starch were examined on the contents of amylose and amylopectin, shapes of particles, and viscosity and pH of paste. And adhesive strength on the drying, accelerated aging, and wetting treatments were measured. The contents of amylopectin of oxidized corn starch were higher those of cationic corn starch, unmodified corn starch, and fermented wheat flour. In case of fermented wheat flour, increasing of a fermentation period was resulted in increasing of amylopectin contents. The particle shapes of commercial corn starch showed with a uniform polygon, but fermented wheat flour showed with a mixture of small and large oval types. The viscosity of oxidized corn starch were very lower those of cationic corn starch and unmodified corn starch. And increasing of a fermentation period of wheat flour was resulted in increasing of viscosity. The pH of commercial corn starch were 3.6-7.5 and fermented wheat flour were 3.6-5.2. Through the examination on the nature and adhesive strength of starch paste, the oxidized corn starch 60 cps which is the name of products and wheat flour which had fermented for 5 years were considered that most suitable for conservation of paper properties.

내첨 전분을 이용한 표면사이징 대체에 관한 기초연구(제1보) (Fundamental Study on the Substitution of Surface Sizing Using Internal Starches(Part 1))

  • 김철환;이지영;백경길;이영록;정호경;이희진;곽혜정
    • 펄프종이기술
    • /
    • 제41권2호
    • /
    • pp.20-25
    • /
    • 2009
  • Many researches are carried out for developing the technology to substitute the surface sizing, although this process improves physical properties and water resistance of paper. This is because surface sizing has fundamental limitation to increase drying energy consumption and to restrict speed of paper machine. However, practical and effective technologies were not developed yet. In this study, we investigated the possibility of the substitution of surface sizing using internal starches, such as cationic starch and oxidized starch. To identify effects of internal starches on physical and optical properties, papers were not only made by adding internal starches into pulp slurry but papers surface sized with oxidized starch were also prepared to compare physical and optical properties. Consequently, tensile strength and internal bond of paper containing internal starches were higher than those of surface sized paper by controlling the type and addition level of cationic starch.

초미립자탄산칼슘이 잉크제트 인쇄품질에 미치는 영향 (The Effect of Precipitated Calcium Carbonate Having a Small Particle Size on the Print Quality of an Inkjet-Grade Paper)

  • 이용규;이희명
    • 펄프종이기술
    • /
    • 제37권2호
    • /
    • pp.38-46
    • /
    • 2005
  • Experimental work was carried out in order to produce a novel grade of ink-jet paper that has both high print-out quality and price competitiveness. Usually, silica and PVOH has been used for ink-jet paper to design the coating layer that has a hydrophilic and micro-porous structure. However, poor rheological characteristics and low productivity of the silica-PVOH system make the price of the ink-jet paper high. The main focus of this study was replacing the conventional silica (coating pigment) PVOH (binder) coating system with the new PCC (coating pigment) cationic starch (binder) coating system, and optimizing thecoating technology associated with PPC-cationic starch system. In this study, ink-jet print quality of PCC-coated papers was compared with that of silica-coated paper. Two types of PCC were used: conventional type and colloid type. It turned out that PCC C, a conventional coating pigment, has not given a desirable result: it showed high dot reproduction, but it gave low optical density. In spite of low dot reproduction, the qualities of PCC A were comparable or superior to those of silica in optical density, color reproduction, and the uniformity of printing surface. It was also shown that the problems that are happened when the dosage level of cationic starch was too low were varied with ink-type used in each printer. However, in the case of low binder level, the produced image was widely spread resulting fromtoo low optical density of images, or from the lack of bonding ability to set ink into coating surface.

Fiber Surface Engineering to Improve Papermaking Raw Material Quality

  • Wang Eugene I-Chen;Perng Yuan Shing
    • 한국펄프종이공학회:학술대회논문집
    • /
    • 한국펄프종이공학회 2006년도 PAN PACIFIC CONFERENCE vol.2
    • /
    • pp.271-278
    • /
    • 2006
  • We used polymers of alternating cationic and anionic nature to build up shells on fiber surfaces, strengthen the worn-out fibers and improve paper properties made from such fibers. OCC and ONP pulps were either dipped or salted out in the cationic polyallylamine, polyacrylamide and starch solutions. After centrifugal drying, these were followed by treatments in anionic polyacrylic acid, poly-acrylamide, and starch solutions, respectively. The shell-enhanced fibers were formed into handsheets and their physical properties evaluated. The results show that building multiple shells on worn-out fiber surfaces can strengthen the fibers and paper. The simpler and more practical impregnation-centrifuging treatment provided the desired effects, whereas salting out the polymers produced somewhat superior fibers. The latter process, were impractical, however. The first pair of polymeric shells imparted marked strength improvement, whereas later layers had diminishing efficacies. Overall, the methods can improve fiber quality, attaining paper strength requirements without resorting to expensive measures. Alternate cationic polymer and filler powders were also deposited on fiber surface based on the micriparticle system in an anticipation of stiffness gains. Platy minerals, such as montmorillonite, bentonite, sericite, clay and talc were added following cationic PAM. After dewatering of polymer-pigment shelled fiber of one to 3 pairs of layers, handsheets either calendered or uncalendered were evaluated. The results indicate that regardless of calendaring, stiffness of the handsheets did not improve appreciably while certain other strength properties showed gains. We also attempted the novel starch gel filler addition method wherein tapioca starch and filers (PCC, sericite or clay) were mixed at high solids content of 50% and cooked until gelatinized. The filled handsheets were dried under various conditions and then tested for their properties. Improvements in strengths of modified filled paper were observed.

  • PDF

산화에스테르전분과 첨가제를 활용한 잉크젯용지의 품질개선 (Improvement of Ink Jet Printing Paper Quality with Oxidized Starch Ester and Additives)

  • 정광호;정영빈;이학래
    • 펄프종이기술
    • /
    • 제45권4호
    • /
    • pp.21-26
    • /
    • 2013
  • The effect of esterified starch as surface sizing agent for inkjet printing paper has been evaluated and compared with oxidized starch. Also the influence of various additives including cationic poly-DADMAC, stearic acrylic copolymer, calcium chloride, and GCC was examined. Results showed that starch ester gave higher ink density than oxidized starch. Addition of poly-DADMAC improved water fastness. In general, low molecular weight poly-DADMAC performed better than high molecular weight one, and it was attributed to the fact that it gave more uniform film forming characteristics in surface sizing. Use of styrene acrylic acid copolymer increased hydrophobicity of the paper surface, but it did not increase the ink density. Use of GCC and calcium chloride had only marginal effect on printing quality.

고농도 펄프 슬러리 충전에서 PCC의 거동 (Behavior of PCC During Loading at High Consistency Pulp Slurry)

  • 조병욱;원종명
    • 펄프종이기술
    • /
    • 제43권5호
    • /
    • pp.43-48
    • /
    • 2011
  • Filler loading at thick stock was carried out in order to verify if the dual addition of filler can be used as a means to reduce the detrimental effects of filler on the strength properties of paper. PCC was added to 3.5% pulp slurry blended with HwBKP, BCTMP and SwBKP. Cationic starch was used as a fixing agent. The mixture of PCC and pulp was stirred for 5, 10 and 20min. at 1,000 rpm. The remaining PCC was washed out before handsheet making. PCC particles were flocculated and fixed on the pulp fiber and/or space between fibers. It is expected that the flocculation and inclusion of PCC can be helpful to improve the strength properties of paper due to the reduction of detrimental effect in fiber bonding. The distinct tendency in PCC flocculation and fixing on pulp fiber was not observed by the change of cationic starch dosage and treatment time.