Try to get the trail leg more in front of the body. I have had the middle of the hurdle on the line and then did trail leg only drills where the trail leg on the other side of the line. Also try to stay taller at takeoff longer. This should help get more stretch in the hip flexor and create an action-reaction to increase it’s speed.
For a 14.1 110m, I would suspect you would need near 11.0 100m speed, just things I have observed in the past.