http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Using nanofibrillated cellulose(CNF) with different fineness as paper additive in SC-Paper
허밍,용성문,이용규,조병욱,원종명 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Traditionally, printing/writing papers have been produced from bleached virgin pulp with about 20% mineral fillers. The primary components of wood fiber walls are lamellas or bundles (aggregates) of microfibrils, sometimes called macrofibrils. Colloidal interaction and mechanical interlocking increase in relation to the surface area of the particles (Campbell 1959). During drainage, the contraction of the fibrils pulls the fibers closer together and promotes the formation of direct hydrogen bonds between the surfaces (Retulainen et al. 1998). Due to their large specific surface area, welldispersed cellulosic fibrils enhance the bonding between wood fibers and distribute stress peaks under loading (Retulainen et al. 1993a, Lobben 1978). The objective of the present work was to study the effect of the dosage of different types of CNFs on the strength properties of paper.
Flocculation of Precipitated Calcium Carbonate by nanofibrillated cellulose with different fineness
허밍,용성문,김두현,이용규,원종명 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Recently, an intense research activity is ongoing within the field of cellulose nanofibrils (NFC) and cellulose microfibrils (MFC). The widespread interest can be explained by a few advantageous basic properties, i.e. high availability as a renewable material, high mechanical strength, large specific surface area and high aspect ratios, barrier properties, dimensional stability, biodegradability and biocompatibility (Eichhorn et al. 2010). The objective of this study was to examine the effect of different cellulose nanofibrils (CNF) on the flocculation of precipitated calcium carbonate (PCC). Of particular interest was the study of how the fineness of CNF affect its flocculation.It is probable that the presence of polyelectrolytes can strengthen and induce formation of CNF/polyelectrolyte bridges between filler particles, leading to efficient flocculation
허밍,원종명,이승환,조병욱 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
Micro-and nanofibrillated celluloses can be considered as strong and elastic materials and their strength potential can be exploited as reinforcing materials in light-weight durable composites as well as in the manufacturing of paper and cardboard products such as packaging materials. In papermaking, cellulose nano- and microfibrils used as strength enhancement additives increase both the bonded area between the fibers, and the strength of the bonds. The increased strength of the fiber network enables higher filler content in the paper, leading to better optical properties and possibilities to lower the grammage of paper and reduce the content of fibrous material and production costs. This paper aims to introduce the concept of nanofibrillated cellulose(NFC) and precipitated calcium carbonate (PCC) composites and the way to achieve a higher filler content whilst maintaining the same paper strength.
허밍,이용규,원종명 한국펄프·종이공학회 2013 펄프.종이기술 Vol.45 No.5
Ultrasonic treatment of KOCC was tried to explore the possibility for improvement of KOCC quality as a raw material for making industrial packaging paper and paperboard. The effect of pH, stock consistencies and treatment times on the ultrasonic response of KOCC were investigated. WRV, apparent density, tensile index and burst index were improved as pH of KOCC slurry is increased. However highest tear index and stiffness were obtained at pH 8. It was also found that the highest WRV and strength properties could be obtained at 0.5% of KOCC consistency during ultrasonic treatment. WRV and most strength properties were improved with ultrasonic treatment time. It was found that ultrasonic treatment can be used as a useful mean for KOCC modificaton.
중국 산해경에 나타난 조류를 모티브한 주얼리 디자인 개발 연구
허밍,문소이,석정원,Ming He,Soi Moon,Jeongwon Seok 한국결정성장학회 2024 한국결정성장학회지 Vol.34 No.1
Artworks inspired by birds have consistently enjoyed popularity, both in the past and present. Designs featuring birds from mythology have particularly garnered significant admiration. Therefore, this study aims to develop into the jewelry design with bird motifs from "Sanhaegyeong", a representative work of Chinese mythology. The research analyzes the characteristics of birds depicted in "Sanhaegyeong" and investigates design cases inspired by these birds. Birds in "Sanhaegyeong" are broadly categorized into divine birds and monstrous birds. Divine birds are predominantly represented with diverse color combinations and unified tones, while monstrous birds are primarily expressed in contrasting colors such as red, green, and white. The study further scrutinizes the forms, colors, and symbolism of jewelry inspired by birds in "Sanhaegyeong". These works predominantly utilize various colors, green, and red. By integrating shapes and patterns relevant to the era associated with the origin of "Sanhaegyeong", designers applied them in the designs, taking into consideration the contextual background and the relevance of design forms. It is anticipated that these research findings will be valuable to designers intrigued by mythical bird designs.
Flocculation of precipitated calcium carbonate by nanocellulose
허밍,원종명,조병욱,이승환 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Recently, an intense research activity is ongoing within the field of cellulose nanofibrils (NFC) and cellulose microfibrils (MFC). The widespread interest can be explained by a few advantageous basic properties, i.e. high availability as a renewable material, high mechanical strength, large specific surface area and high aspect ratios, barrier properties, dimensional stability, biodegradability and biocompatibility (Eichhorn et al. 2010). This paper aims to use nanofibrillated cellulose as strength enhancement additives and examine the effect of flocculation and the retention of precipitated calcium carbonate (PCC), in order to find the way to achieve a higher filler content whilst maintaining the same paper strength. In this study, bleached kraft pulp from softwood were used as raw materials for the preparation of nanofibrillated cellulose (NFC).The flocculation of fillers was studied with a photometric dispersion analyser(PDA).We explored the effect these parameters had on the flocculation rate and final floc size. The stirring speed varied between 300, 900 rpm, and the flowrate through the tubing was set to 100 mL/min. And the dosage of NFC on PCC soild varied from 0.1% to 10%. Data was obtained as the RATIO of the RMS/DC signal over time. The RATIO signal is an indirect measure of the level of flocculation.