THE RHEOLOGY AND CURING PROPERTIES OF CELLULOSE-NANOFIBERS/POLYACRYLI C RESIN MIXTURE FOR 3D PRINTING
As a rapid prototyping technology,three dimensional 3D printing has attracted more interesting because of its high efficiency,high speed and high precision.And developing new materials for 3D printing is a currently interest topic.A novelty waterborne UV-curing material for 3D printing was prepared by mixing the freeze-dried cellulose-nanofibers(CNFs)with photopolymerizable s carboxyl and mass content on dispersion and rheology of CNFs/CR mixture were investigated.Then the CNFs/CR mixture was used to fabricate the dumbbell-shaped and the honeycomb-like hydrogel by Stereolithograph SLA process.The dumbbell-shaped hydrogels mechanical properties and the honeycomb patterns precision were studied as well.The results showed that the mixture with different CNFs content are all uniform and transparent,displaying a well dispersing performance.For low shear rate of less than 10 s-1,the viscosity of the mixture with 2.4%CNFs(1.41 mmol/g)content is 4.21 Pa.s which is suitable for SLA; when the content increases to 2.8%,the s viscosity increases to 6.72 Pa.s which meets the ink-s requirements.When the carboxyl content increases from 1.22,1.37,1.53 and 1.73mmol/g,the tensile modulus of dumbbell-shaped hydrogel is correspondingly 5.22,3.52,3.05 and 2.14 MPa.A clear honeycomb pattern with high precision can be obtained under the curing time of 20s and photoinitiator dosage of 0.1%.Therefore the viscosity of CNFs/CR mixture with light-curing can be controlled to meet the requirements of SLA and ink-jet printing and may find applications in 3D printing.
Aimin Tang Jiao Li Shan Zhao Wangyu Liu
State Key Laboratory of Pulp and Paper Engineering,South China University of Technology Guangzhou 51 School of Mechanical and Automotive Engineering,South China University of Technology Wushan RD No.38
国际会议
第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)
广州
英文
1-5
2016-11-07（万方平台首次上网日期，不代表论文的发表时间）