机械力化学法制备河蚌珍珠层生物填料及其表面特性研究

以废弃河蚌壳为原料,经去除角质层、分离棱柱层,得到珍珠层。采用机械力化学法研磨得到生物填料(HBZZC),对其物相组成、微观形貌、热稳定性及其亲水、亲油性等表面特性进行了分析表征。实验结果表明制备的生物填料主要成分为文石碳酸钙,成片状,粒径大小约为40～1000nm,有机物含量约为4.34%,热稳定性良好。表面元素平均原子分数为Ca(8.71%),C(45.17%),O(43.79%),N(2.33%),其中有机物中各元素实际原子分数为C(64.59%),O(31.28%),N(4.13%)。HBZZC粉体具有亲水、亲油双亲性,对正庚烷浸润,对水的接触角约为24.5°。利用河蚌壳为原料生产的生物填料在水性涂料和树脂中具有良好的应用前景。

Preparation of bio-filler from mussel shell by means of mechanochemistry and its surface properties

Waste mussel shell stacking with a significant odor and toxicity which are hazardous to human constitutes a serious environmental hazard.For utilization of waste mussel shell resource,granule of mussel shell(HBZZC) was prepared from waste mussel shell by removing cuticle,separating prismatic layer and the left nacreous layer was grinded by the means of mechanochemistry.The results of HBZZC show that the main composition of HBZZC is aragonite(CaCO3) platelets and the particle size distribution range of HBZZC powder is from 40 to 1000nm,the proportion of organic components of HBZZC is about 4.34% and with a good thermal stability.Calcium,carbon,oxygen and nitrogen contents on the surface of HBZZC determined by XPS is 8.71%,45.17%,43.79%,2.33% respectively,while the actual contents of carbon,oxygen and nitrogen of the organic matter within the HBZZC powder is approximately 64.59%,31.28%,4.13% separately.Both of hydrophilic property and lipophilic property of HBZZC powder are significantly.N-heptane spreads out on the HBZZC powder and the water contact angle is about 24.5°.Using mussel shell for producing bio-filler for practical application as fillers for reinforcing polymers and waterborne coatings is expected.