CN112168717B - 基于水凝胶的缓释面膜及其制备方法和使用方法 - Google Patents

基于水凝胶的缓释面膜及其制备方法和使用方法 Download PDF

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CN112168717B
CN112168717B CN202011067465.0A CN202011067465A CN112168717B CN 112168717 B CN112168717 B CN 112168717B CN 202011067465 A CN202011067465 A CN 202011067465A CN 112168717 B CN112168717 B CN 112168717B
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蔺会杰
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Abstract

一种基于水凝胶的缓释面膜,所述基于水凝胶的缓释面膜包括依次排布的背衬层、非织造纤维层A、水凝胶层、非织造纤维层B、水凝胶层。所述水凝胶层中的水凝胶包括(1)通式为R‑(EO)n‑(PO)m‑(EO)n‑R的水性嵌段共聚物,(2)通式为HO‑(EO)a‑(PO)b‑(EO)a‑H的泊洛沙姆,(3)辅助凝胶‑溶胶剂,(4)皮肤保养成分,(5)余量水。所使用的水性嵌段共聚物是基于泊洛沙姆的衍生物,利用氨基酸对结构通式为HO‑(EO)n‑(PO)m‑(EO)n‑H的泊洛沙姆进行酯化封端,然后再配合结构通式为HO‑(EO)a‑(PO)b‑(EO)a‑H的泊洛沙姆,可以将水凝胶的凝胶‑溶液转变温度控制在30‑35℃之间,同时使得水凝胶在0‑20℃之间呈现为透明凝胶形态。本发明的这种水凝胶在保养用面膜中具有特别的应用优势。

Description

基于水凝胶的缓释面膜及其制备方法和使用方法
技术领域
本发明涉及美容面膜领域,具体涉及一种基于水凝胶的缓释面膜及其制备方法和使用方法。
背景技术
面膜是女性常用的保养产品,通过将带有各种营养液、修复成分、美白成分、保湿成分等组分的面膜贴敷在面部,可以在保持面部肌肤水分充裕,增加皮肤角质层的湿度,软化角质,促使肌肤表面的毛孔扩张,促进新陈代谢,并将面膜中的各种保养成分吸收,以达到保养面部皮肤的作用。
传统的面膜产品中,有的面膜产品的吸附能力有限,所能携带的营养液等成分的较少,使得面膜的保养效果不足;有的面膜产品虽然能够携带大量的营养液等成分,但是,其无法将所携带的营养液等成分持续释放,或者释放营养液等成分的速度过慢,使得面膜的保养效果远低于预期;有的面膜产品既能够携带大量的营养液成分,也能够持续释放面膜内的营养液等成分,但是,其释放速度过快,远高于皮肤所能够吸收的速度,使得大量的营养液成分、水份挥发,面膜在较短的时间内变得干燥而失去保养效果。
水凝胶先在医用领域发挥作用,人们利用水凝胶的胶凝性质和凝胶状态,以及凝胶对药物活性成分的长时间缓释作用,将其用在人体的各种黏膜表面或皮肤表面的疾病治疗。随后,人们开始尝试将水凝胶用于非医用领域,如保养面膜中。然而,在这些尝试大都仅限于沿用水凝胶在医用领域的作用,并没有充分地实际结合到普通的保养面膜的实际情况中。
普通的保养面膜的使用时间一般在15-20分钟为宜,若延续水凝胶在医疗领域的用法,即利用水凝胶的胶凝状态,会使得普通的保养面膜的贴敷时间大幅增加至数小时,不太适用。因此,需要充分利用水凝胶的胶凝状态和溶液状态这两个状态,从而有效控制面膜中的营养液等成分的持续、合理释放。为此,本发明期望提出一种基于水凝胶的缓释面膜及其制备方法和使用方法。
发明内容
为了解决现有的保养面膜中所存在的上述不足,本发明提供了一种基于水凝胶的缓释面膜及其制备方法和使用方法。
本发明的第一方面包括一种基于水凝胶的缓释面膜。所述基于水凝胶的缓释面膜依次包括背衬层、非织造纤维层A、水凝胶层、非织造纤维层B、水凝胶层,
其中,所述背衬层是以聚对二甲苯为原料,在室温附近的温度条件下,在非织造纤维层A表面气相沉积而成。
其中,所述非织造纤维层A和/或非织造纤维层B由多根随机排列的纤维经热粘合形成,所述纤维表面包括亲水性聚合物涂层。
其中,所述水凝胶层中的水凝胶为可逆透明水凝胶,所述可逆透明水凝胶在0-20℃之间呈现为透明凝胶形态,在30-35℃之间开始发生凝胶-溶液,即所述可逆透明水凝胶的凝胶-溶液转变温度介于30-35℃之间。
其中,所述可逆透明水凝胶包括:
(1)水性嵌段共聚物,所述水性嵌段共聚物具有如下通式,
R-(EO)n-(PO)m-(EO)n-R,
其中,R为氨基酸酯基,(EO)n是聚环氧乙烷嵌段,(PO)m是聚环氧丙烷嵌段,n是介于50-100的整数,m是介于30-50的整数,其含量约占可逆透明水凝胶总质量的10-20%,
(2)泊洛沙姆,所述泊洛沙姆具有如下通式,
HO-(EO)a-(PO)b-(EO)a-H,
其中,(EO)a是聚环氧乙烷嵌段,(PO)b是聚环氧丙烷嵌段,a是介于80-150的整数,b是介于40-80的整数,其含量约占可逆透明水凝胶总质量的1-10%,
(3)辅助凝胶-溶胶剂,选自月桂醇聚醚、油醇聚醚、脂肪醇聚醚、硬脂酸甘油酯、油酸甘油酯中的一种或多种,其含量约占可逆透明水凝胶总质量的1-5%,
(4)皮肤保养成分,皮肤保养成分可以是对皮肤具有改善皱纹、美白、保湿等功能的成分,如腺苷、熊果苷、透明质酸及其盐、甘油、胶原蛋白、马齿苋提取物、辛酸甘油酯等,其含量约占可逆透明水凝胶总质量的1-20%,
(5)余量水。
进一步地,所述氨基酸酯基选自丙氨酸酯基、谷氨酸酯基、甘氨酸酯基、天冬氨酸酯基、半胱氨酸酯基、赖氨酸酯基、亮氨酸酯基、异亮氨酸酯基、苯丙氨酸酯基中的一种或多种。
本发明的第二方面包括一种基于水凝胶的缓释面膜的制备方法,包括以下步骤:
(1)将聚合物材料挤出形成纤维丝,并在纤维丝表面涂覆亲水性聚合物涂层,然后将多跟涂覆有亲水性聚合物涂层的纤维丝随机平铺,并通过热粘合工艺进行粘合,得到非织造纤维层A和非织造纤维层B;
(2)以非织造纤维层A作为基底,以聚对二甲苯为原料,在基底温度为20-50℃的条件下进行化学气相沉积,在非织造纤维层的一侧沉积背衬层;
(3)将本发明的可逆透明水凝胶涂覆在非织造纤维层A的另一侧,并加热至40-60℃,使可逆透明水凝胶充分发生凝胶-溶液转变,然后将非织造纤维层B浸没并悬浮在可逆透明水凝胶的溶液中,然后将温度降至20℃以下,使其发生溶液-凝胶转变,转变完全后,即可得到依次包括背衬层、非织造纤维层A、水凝胶层、非织造纤维层B、水凝胶层的基于水凝胶的缓释面膜。
由于本发明的可逆透明水凝胶的凝胶-溶液转变温度介于30-35℃之间,且在0-20℃之间呈现为透明凝胶形态,本发明所制得的基于水凝胶的缓释面膜需要在20℃以下冷藏为宜。
本发明的第三方面包括基于水凝胶的缓释面膜的使用方法,首先,将冷藏的基于水凝胶的缓释面膜取出,在自然环境中静置3-10min,使其温度接近于室内温度,然后在将其贴覆与皮肤表面,贴覆30-35min后,取下即可。
其中,所述皮肤表面可以是面部皮肤表面,也可以是手臂皮肤表面、腿部皮肤表面、腹部皮肤表面、背部皮肤表面。
进一步地,如果面膜中的初始水凝胶含量较高,在使用一次之后仍然还有较多的水凝胶,可以将使用后的面膜取下,然后降温至20℃以下使其再次发生溶液-凝胶转变,转变完全后,在20℃以下冷藏,可以再次使用。
本发明中,使用了可逆透明水凝胶作为面膜中的营养成分的载体。其中,所使用的水性嵌段共聚物是基于泊洛沙姆的衍生物,利用氨基酸对结构通式为HO-(EO)n-(PO)m-(EO)n-H的泊洛沙姆进行酯化封端,然后再配合结构通式为HO-(EO)a-(PO)b-(EO)a-H的泊洛沙姆,可以将水凝胶的凝胶-溶液转变温度控制在30-35℃之间,同时使得水凝胶在0-20℃之间呈现为透明凝胶形态。本发明的这种水凝胶在保养用面膜中具有特别的应用优势。
一方面,水凝胶对各种营养成分和水分的携带量充足,使得面膜保养效果得到保障。另一方面,面膜中使用的可逆透明水凝胶具有30-35℃的凝胶-溶液转变温度,将具有该凝胶-溶液转变温度的可逆透明水凝胶的面膜贴覆与人体皮肤表面后,人体皮肤表面的温度通常≥36.2℃,能够促使面膜中的可逆透明水凝胶逐步发生凝胶-溶液转变,实现面膜内的营养成分的缓释以及释放速度的控制。
通过面膜中的可逆透明水凝胶的凝胶-溶液转变而释放的营养成分和水分的速率比较适中,略高于皮肤的吸收速率,这使得皮肤能够充分利用面膜中的营养成分和水分,避免了大量溶液状态的营养成分和水分在空气中被挥发,造成营养液和水分的利用率不高的问题。
此外,在本发明的基于水凝胶的缓释面膜中,还包括设置在中间的非织造纤维层B,其表面具有亲水性聚合物涂层,能够有效地控制凝胶-溶液转变后的溶液,将溶液束缚在面膜区域内,避免了营养成分和水分的流失。
本发明的面膜采用化学气相沉积的聚对二甲苯作为背衬层,具有优异的阻隔效果,能够有效避免面膜中的营养成分和水分的挥发。
具体实施方式
以下的实例仅仅是以说明性的目的给出,不应将其理解为本发明的全部内容。
实施例
一种基于水凝胶的缓释面膜,包括依次排布的背衬层、非织造纤维层A、水凝胶层、非织造纤维层B、水凝胶层,其中,所述背衬层是以聚对二甲苯为原料,在非织造纤维层A表面气相沉积而成;所述非织造纤维层A和/或非织造纤维层B由多根随机排列的纤维经热粘合形成,所述纤维表面包括亲水性聚合物涂层;
其特征在于:所述水凝胶层中的水凝胶为可逆透明水凝胶,所述可逆透明水凝胶在0-20℃之间呈现为透明凝胶形态,在30-35℃之间开始发生凝胶-溶液;
所述可逆透明水凝胶包括:
(1)水性嵌段共聚物,所述水性嵌段共聚物具有如下通式,
R-(EO)n-(PO)m-(EO)n-R,
其中,R为氨基酸酯基,(EO)n是聚环氧乙烷嵌段,(PO)m是聚环氧丙烷嵌段,n是介于50-100的整数,m是介于30-50的整数,其含量约占可逆透明水凝胶总质量的10-20%,
(2)泊洛沙姆,所述泊洛沙姆具有如下通式,
HO-(EO)a-(PO)b-(EO)a-H,
其中,(EO)a是聚环氧乙烷嵌段,(PO)b是聚环氧丙烷嵌段,a是介于80-150的整数,b是介于40-80的整数,其含量约占可逆透明水凝胶总质量的1-10%,
(3)辅助凝胶-溶胶剂,其含量约占可逆透明水凝胶总质量的1-5%。
(4)皮肤保养成分,其含量约占可逆透明水凝胶总质量的1-20%,
(5)余量水。
其中,所述水性嵌段共聚物是直接以结构式为HO-(EO)n-(PO)m-(EO)n-H的泊洛沙姆和氨基酸为原料,在催化剂的作用下,进行酯化封端反应而得到的。
所述基于水凝胶的缓释面膜按照如下方法进行制备:
(1)将聚合物材料挤出形成纤维丝,并在纤维丝表面涂覆亲水性聚合物涂层,然后将多跟涂覆有亲水性聚合物涂层的纤维丝随机平铺,并通过热粘合工艺进行粘合,得到非织造纤维层A和非织造纤维层B;
(2)以非织造纤维层A作为基底,以聚对二甲苯为原料,在基底温度为20-50℃的条件下进行化学气相沉积,在非织造纤维层的一侧沉积背衬层;
(3)将所述可逆透明水凝胶涂覆在非织造纤维层A的另一侧,并加热至40-60℃,使可逆透明水凝胶充分发生凝胶-溶液转变,然后将非织造纤维层B浸没并悬浮在可逆透明水凝胶的溶液中,然后将温度降至20℃以下,使其发生溶液-凝胶转变,转变完全后,即可得到依次包括背衬层、非织造纤维层A、水凝胶层、非织造纤维层B、水凝胶层的基于水凝胶的缓释面膜。
表1中列出了三组具体的实例。
以实例1为例,将处于5℃的冰箱中冷藏的面膜的面膜从冰箱中取出,并在自然环境中放置10min后,待其温度与室温接近后,再将其贴敷在人体面部皮肤表面,约2min后,面膜内开始出现较多的溶液。随着时间的推移,溶液并为出现从面部溢流的情况,面膜内的溶液被有效地束缚在面膜的区域内。贴敷约30min后,面膜内的溶液量与贴敷约5min后的溶液量相当,表明本发明的基于水凝胶的缓释面膜能够有效地实现面膜内的营养成分和水分的持续释放,且释放速率适中,易于人体皮肤对营养成分和水分的充分吸收和利用。

Claims (5)

1.一种基于水凝胶的缓释面膜,所述基于水凝胶的缓释面膜包括依次排布的背衬层、非织造纤维层A、水凝胶层、非织造纤维层B、水凝胶层,
其中,所述背衬层是以聚对二甲苯为原料,在非织造纤维层A表面气相沉积而成;所述非织造纤维层A和/或非织造纤维层B由多根随机排列的纤维经热粘合形成,所述纤维表面包括亲水性聚合物涂层;
其特征在于:所述水凝胶层中的水凝胶为可逆透明水凝胶,所述可逆透明水凝胶在0-20℃之间呈现为透明凝胶形态,在30-35℃之间开始发生凝胶-溶液转变,即所述可逆透明水凝胶的凝胶-溶液转变温度介于30-35℃之间;
所述可逆透明水凝胶包括:
(1)水性嵌段共聚物,所述水性嵌段共聚物具有如下通式,
R-(EO)n-(PO)m-(EO)n-R,
其中,R为氨基酸酯基,所述氨基酸酯基选自丙氨酸酯基、谷氨酸酯基、甘氨酸酯基、天冬氨酸酯基、半胱氨酸酯基、赖氨酸酯基、亮氨酸酯基、异亮氨酸酯基、苯丙氨酸酯基中的一种或多种,(EO)n是聚环氧乙烷嵌段,(PO)m是聚环氧丙烷嵌段,n是介于50-100的整数,m是介于30-50的整数,其含量约占可逆透明水凝胶总质量的10-20%,
(2)泊洛沙姆,所述泊洛沙姆具有如下通式,
HO-(EO)a-(PO)b-(EO)a-H,
其中,(EO)a是聚环氧乙烷嵌段,(PO)b是聚环氧丙烷嵌段,a是介于80-150的整数,b是介于40-80的整数,其含量约占可逆透明水凝胶总质量的1-10%,
(3)辅助凝胶-溶胶剂,其含量约占可逆透明水凝胶总质量的1-5%;所述辅助凝胶-溶胶剂选自月桂醇聚醚、油醇聚醚、脂肪醇聚醚、硬脂酸甘油酯、油酸甘油酯中的一种或多种。
(4)皮肤保养成分,其含量约占可逆透明水凝胶总质量的1-20%,
(5)余量水。
2.如权利要求1所述的一种基于水凝胶的缓释面膜,其特征在于,所述皮肤保养成分包括腺苷、熊果苷、透明质酸及其盐、甘油、胶原蛋白、马齿苋提取物、辛酸甘油酯中的一种或多种。
3.一种如权利要求1-2任一项所述的一种基于水凝胶的缓释面膜的制备方法,包括以下步骤:
(1)将聚合物材料挤出形成纤维丝,并在纤维丝表面涂覆亲水性聚合物涂层,然后将多跟涂覆有亲水性聚合物涂层的纤维丝随机平铺,并通过热粘合工艺进行粘合,得到非织造纤维层A和非织造纤维层B;
(2)以非织造纤维层A作为基底,以聚对二甲苯为原料,在基底温度为20-50℃的条件下进行化学气相沉积,在非织造纤维层的一侧沉积背衬层;
(3)将所述可逆透明水凝胶涂覆在非织造纤维层A的另一侧,并加热至40-60℃,使可逆透明水凝胶充分发生凝胶-溶液转变,然后将非织造纤维层B浸没并悬浮在可逆透明水凝胶的溶液中,然后将温度降至20℃以下,使其发生溶液-凝胶转变,转变完全后,即可得到依次包括背衬层、非织造纤维层A、水凝胶层、非织造纤维层B、水凝胶层的基于水凝胶的缓释面膜。
4.一种如权利要求1-2任一项所述的一种基于水凝胶的缓释面膜的使用方法,包括,未使用时,将基于水凝胶的缓释面膜放置在20℃以下的环境中冷藏,使用前,将冷藏的基于水凝胶的缓释面膜取出,在自然环境中静置3-10min,使其温度接近于室内温度,然后在将其贴覆与皮肤表面,贴覆30-35min后,取下即可。
5.一种如权利要求4所述的使用方法,包括将使用后的面膜取下,然后降温至20℃以下使其再次发生溶液-凝胶转变,转变完全后,在20℃以下冷藏,以备再次使用。
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