For manufacturing superhydrophobic silicon rubber surface（SSRS） efficiently and conveniently

we used the high voltage（HV） electrospray to prepare SSRS in laboratory and discussed some key issues in the process. The solution for electrospray is a composite system

which is comprised of AB component high-temperature vulcanization（HTV） liquid silicon rubber（LSR）

petroleum ether

N

N-dimethylformamide（DMF）

Si O2 nano-particles

and heptadecafluorodecyl trimethoxysilane（FAS-17）. According to the preparing process

several results were obtained. Conclusions can be drawn as follows: petroleum ether is effective to dilute HTV;DMF helps elevate the polarity of electrospray solution

which makes the solutio

n easy to spray and reduces the scale length of spray particles;Si O2 nano-particles contribute to construct hierarchically micro-nano structures in the substrate;By adding FAS-17 into the solution

fluorine group will be introduced to HTV surfaces

which lowers the surface free energy and decreases the scale length of the surface morphology to 100 nm

1

μm. After a number of tests

we have proposed an optimized composition of the electrospray solution: the percentages of petroleum ether

HTV

DMF

Si O2

and FAS-17 are about 41%

20%

30%

4%

and 5%

respectively. With this composition

we can obtain SSRS with static contact angel of 163.4° and sliding angle of 4.3°.