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| Influence of Fiber Size on the Yield Stress of the Fiber Suspension |
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| DOI：10.11981/j.issn.1000-6842.2018.01.27 |
| Key Words:non-Newtonian fluid; nylon fiber; fiber suspension; yield stress; crowding number |
| Fund Project:江苏省高校优势学科建设工程(PAPD)；江苏省制浆造纸科学与技术重点实验室开放基金（201317）；江苏省高等学校大学生创新创业训练计划项目(201610298126H)。 |
| Author Name | Affiliation | | 王 晨1，2 | 1. 南京林业大学江苏省制浆造纸科学与技术重点实验室， 江苏南京， 210037；2. 南京林业大学江苏省林业资源高效加工利用协同创新中心，江苏南京， 210037 | | 马若腾1，2 | 1. 南京林业大学江苏省制浆造纸科学与技术重点实验室， 江苏南京， 210037；2. 南京林业大学江苏省林业资源高效加工利用协同创新中心，江苏南京， 210037 | | 董凯辉1，2 | 1. 南京林业大学江苏省制浆造纸科学与技术重点实验室， 江苏南京， 210037；2. 南京林业大学江苏省林业资源高效加工利用协同创新中心，江苏南京， 210037 | | 薛智轩1，2 | 1. 南京林业大学江苏省制浆造纸科学与技术重点实验室， 江苏南京， 210037；2. 南京林业大学江苏省林业资源高效加工利用协同创新中心，江苏南京， 210037 | | 张 辉1，2，* | 1. 南京林业大学江苏省制浆造纸科学与技术重点实验室， 江苏南京， 210037；2. 南京林业大学江苏省林业资源高效加工利用协同创新中心，江苏南京， 210037 |
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| Abstract: |
| The yield stresses of the suspensions containing different size nylon fibers were measured by the rheometer with the propeller-type rotor at the same fiber volume fraction and crowding number. The yield stresses of the suspensions containing different mixing ratios of two kinds of nylon fiber were also studied.The results showed that the suspension containing the fiber with larger aspect ratio showed higher yield stress at the same volume fraction. But there was no regular relationship between the aspect ratio and the coefficients of power-law equation of the yield stress and the volume fraction. The yield stress could not be expressed by the function only with the crowding number but was inversely proportional to the aspect ratio. So at the same crowding number， the suspension containing the fiber with lower aspect ratio showed higher yield stress.The yield stress of the mixing suspension of two kinds of nylon fiber decreased linearly along with decreasing of the volume fraction of the fiber with lager aspect ratio． |
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