http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 릴리멜라니 (검색결과 2 건)
-
-
Studies on the biodegradable Wet-laid nonwoven fabrication using bio-based cellulosic materials
릴리멜라니 국민대학교 일반대학원 2020 국내박사
Nonwoven products are dominated by man-made fiber made from synthetic, natural, and inorganic materials. In this study, the possibilities of using cellulose fibers to produce nonwoven with existing papermaking technology were investigated. First, the effect of wood pulp and the Lyocell blend ratio was investigated based on the properties of fabricated nonwoven. Thus, the addition of chemical additives was introduced to impart the strength and surface softness properties. Finally, the process parameter based on the chemical additives has been optimized to achieve the desired strength properties and surface softness of wet-laid nonwoven. The result indicated that the properties of strength and surface softness of wet-laid nonwoven were enhanced by the contribution of entanglement between wood pulp/Lyocell. Among of the three pulps; softwood bleached kraft pulp (SwBKP), hardwood bleached kraft pulp (HwBKP), and dissolving pulp (DP); SwBKP was superior to both HwBKP and DP on account of its higher properties of density and tensile strength, which were increased by refining treatments. HwBKP showed lower MAD value (mean deviation from the average surface friction) in the states of unrefined pulp, however, the value increased sharply as the progressive refining applied. Chemical additives, i.e., dry-, wet strength agent, and Expancel® microsphere and softening agent were introduced to impart the functionality of wet-laid nonwovens. Dry strength agent imparted the dry tensile strength, while wet strength agents improved both dry and wet tensile strength of wet-laid nonwoven. Both the dry and wet strength agents did not affect to surface softness component. Meanwhile, the softening agent improved the surface softness while tensile strength became lower owing to the debonding of fiber. Also, the application of EM showed a significant effect on tensile strength and surface softness. Response surface methodology (RSM) with Box-Behnken Design (BBD) matrix was used to optimize the chemical additives combination. Results showed that the wet strength agent had the most significant effect on tensile strength while the softening agent had the most significant effect on MAD value as surface softness improved. Based on the optimization analysis, softening agent 0.4%, wet strength agent 1.01%, and Expancel® microsphere 3.0% were found to be feasible to obtain the wet-laid nonwoven having good strength and smooth surface with predicted tensile strength and MAD value were 7.07 MPa and 0.0222, respectively. The verification experiment had been conducted and the results were suitable with those predicted models with tensile strength and MAD value were 7.03 MPa and 0.0232, respectively with the R^2 ~ 0.95. Overall the study suggested that cellulose wood pulp and Lyocell showed the possibilities as the raw material for nonwoven, which offering good strength and sufficient surface softness. Optimize the parameter process may improve work efficiency and reduce time consumption. To the end, wood pulp/Lyocell wet-laid nonwoven may be applied as eco-friendly material which competitive and marketable for hygiene products, thus could reduce environmental matters.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
