Development of a water‐resistant and detergent‐washable powder coated with a stimuli‐responsive polymer and its application to suncare products
Development of a water‐resistant and detergent‐washable powder coated with a stimuli‐responsive polymer and its application to suncare products
复制标题
一种涂有刺激响应聚合物的防水且可用洗涤剂清洗的粉末的开发及其在防晒产品中的应用
DOI：
10.1111/j.1468-2494.2009.00532_1.x
复制
发表时间：
2009
影响因子：
2.3
通讯作者：
S. Yusa
中科院分区：
文献类型：
--
作者：
Tomoaki Osawa;A. Sogabe;Masayuki Shirao;Shuji Nishihama;I. Kaneda;S. Yusa
IFSCC杂志，12（2009）（1）3-7
众所周知，防晒配方中使用的无机紫外线防护粉末的表面经过脂肪酸或其他疏水性化学物质处理，以获得高防水性。由于产生的强疏水表面，该处理具有明显的缺点，因为它允许防晒霜在用普通肥皂洗涤后将其基础成分留在皮肤上。因此，在本研究中，为了开发具有高防水性并且可以用普通肥皂轻松洗掉的智能防晒配方，我们专注于pH响应聚合物作为UV防护粉末的表面处理剂。大量的实验导致2-丙烯酰胺基-2-甲基-1-丙磺酸/11-甲基丙烯酰胺基十一烷酸（AMPS/MAU）共聚物的合成，其在酸性至中性溶液中是疏水的，在碱性溶液中是亲水的。用AMPS/MAU共聚物处理表面处理的二氧化钛显示出与聚合物类似的高pH响应性。含有pH响应性二氧化钛的W/O型防晒剂显示出高耐水性以及用常规肥皂的高可洗性。
关键词：可洗涤，pH响应聚合物，pH响应粉末，防晒产品，防水
IFSCC Magazines, 12 (2009) (1) 3–7
It is generally well known that the surface of an inorganic UV-protective powder used in a sunscreen formula is treated with a fatty acid or other hydrophobic chemicals to obtain a high water resistance. Due to the resulting strongly hydrophobic surface, the treatment has a clear drawback in that it allows the sunscreen to leave its base components on the skin after washing with regular soap. Therefore, in this study to develop an intelligent sunscreen formula that has a high water resistance and can be washed away easily with regular soap, we focused on a pH-responsive polymer as the surface-treatment agent for a UV-protective powder. Numerous experiments led to the synthesis of the 2-acrylamido-2-methyl-1-propanesulfonic acid/11-methacrylamidoundecanoic acid (AMPS/MAU) copolymer, which is hydrophobic in acidic to neutral solution and hydrophilic in basic solution. Titanium dioxide subjected to surface treatment was treated with the AMPS/MAU copolymer showed a high pH-responsiveness that was similar to that of the polymer. A W/O-type sunscreen containing the pH-responsive titanium dioxide showed a high water resistance as well as a high washability with regular soap.
Keywords: Detergent-washable, pH-responsive polymer, pH-responsive powder, sun care product, water-resistant