The invention relates to a method of preparing a
cellulose fibre releasing anions by using the
solvent method and the application. The method has the following steps: firstly, the comminuted
cellulose,
tourmaline powder and addition agent are well mixed with an ironic liquid, dissolved at a temperature of 35 to 160 DEG C, deaerated for 1 to 120 hours and a homogeneous and stable
spinning solution with a
total solid content of 3 to 30 percent is formed, wherein, the mixed
mass ratio of the
tourmaline powder is 0.01 to 20 percent and the
added mass ratio of the addition agent is 0 to 10 percent; secondly, the
spinning solution is filtered, deaerated, spinned and solidified through a coagulation bath; and thirdly, a composite fibre of
cellulose and
tourmaline powder is obtained after the procedures of stretching, water cleaning, bleaching, oiling and
drying. The composite fibre has the functions of releasing anions, generating
far infrared radiation, generating biocurrent and suppressing
bacteria and is applicable to the fields of garments,
ornaments and medical textiles. The ironic liquid used in the invention has high production efficiency, is easy for
callback and conforms to the requirement of a
green production. The prepared composite fibre has excellent
mechanical strength and
mechanical property, and the fabric made of the composite fibre can release anions,
resist bacteria and prevent
mildew.