NDLI: Effect of chain length on the wetting properties of alkyltrichlorosilane coated cellulose-based paper

Content Provider	Springer Nature Link
Author	Tang, Zhenguan Li, Hanyang Hess, Dennis W. Breedveld, Victor
Copyright Year	2016
Abstract	The effect of alkyl chain length on the wetting properties of alkyltrichlorosilane coated cellulose-based paper is reported for four different reagents: methyltrichlorosilane (MTCS; –CH3), butyltrichlorosilane (BTCS; –C4H9), dodecyltrichlorosilane (DTCS; –C12H25) and octadecyltrichlorosilane (OTCS; –C18H37). SEM analysis reveals that by systematically varying alkyl chain length, films with different surface morphologies can be generated on flat silicon wafer control samples and on cellulose-based paper samples. The variation in surface morphology leads to different wetting behavior, as determined by measuring static water and oil contact angles. Due to the nano- and micron- scale roughness on MTCS coated substrates, paper samples coated with MTCS display superhydrophobicity with a water contact angle of 152.2°, which is the highest water contact angle among these four alkyltrichlorosilanes. However, additional nano-scale roughness from MTCS coating reduces the oil resistance of coated paper samples, while paper samples coated with long-chain alkyltrichlorosilanes have lower surface energy and also lack nano-scale roughness. As a result, paper samples coated with OTCS display the highest resistance against oils (ethylene glycol contact angle 125.5°; diiodomethane contact angle 101.3°). The intrinsic porosity of paper is largely retained after coating, as indicated by the fact that low surface tension fluids like methanol can easily penetrate coated paper samples.
Starting Page	1401
Ending Page	1413
Page Count	13
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	23
Issue Number	2
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-02-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alkyltrichlorosilane Water repellency Superhydrophobic surface Methyltrimethoxysilane Octadecyltrichlorosilane Bioorganic Chemistry Physical Chemistry Organic Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Polymers and Plastics

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