Page 88 - 《精细化工》2021年第10期
P. 88
·2018· 精细化工 FINE CHEMICALS 第 38 卷
表 3 水凝胶修复效率 (4)基于互穿网络、氢键和硼酸根交联的策略
Table 3 Self-healing efficiency of the hydrogels 改善水凝胶机械性能,提高了水凝胶的力学强度和
样品 拉伸强度/kPa 修复强度/kPa 修复效率/% 韧性。水凝胶在溶胀度为 4、SB 含量为 2.5%时自修
1#(24 h) 725 326 45
2#(48 h) 686 432 63 复性能突出,最大拉伸强度为 668 kPa,最大断裂伸
3#(72 h) 714 578 81 长率可达 665%,修复效率达 81%。
由此可见,水凝胶在溶胀度 4、SB 用量 2.5% 参考文献:
时自修复性能突出。 [1] GE J, NEOFYTOU E, CAHILL T J, et al. Drug release from
electric-field-responsive nanoparticles[J]. ACS Nano, 2012, 6(1):
2.9 可注射及 3D 打印性能
227-233.
动态共价键交联的水凝胶具有剪切稀释性的特 [2] SONG G (宋鸽), ZHANG M (张敏), SONG J (宋洁), et al.
征,即水凝胶的表观黏度随着剪切速率增加而降低。 Preparation and properties of a core-shell hydrogel loaded with yeast
and TiO 2 nanoparticles[J]. Fine Chemicals (精细化工), 2021, 38(3):
在剪切作用下,水凝胶内部交联暂时断裂,黏度降
518-524.
低,流动性增强,表现出可注射性能。本文通过水 [3] SUN M M (孙苗苗), WEI P H (魏培贺), KANG C (康纯), et al.
凝胶针管挤压实验验证水凝胶的可注射性。溶胀度 Preparation and drug loading properties of an injectable CS/PLLA-SA
composite hydrogel[J]. Fine Chemicals (精细化工), 2021, 38(2):
为 4, SB 含量为 2.5%的水凝胶具良好的黏弹性和强
358-365.
度,但流动性差,注射困难,故选用溶胀度高,SB [4] WANG X, HUANG H, LIU H, et al. Multi-responsive bilayer
含量较低的水凝胶作针管挤压实验。配制溶胀度为 hydrogel actuators with programmable and precisely tunable
motionsmacromol[J]. Chemistry and Physics, 2019, 220(6):558-562.
8、SB 含量为 1%的水凝胶,并以亚甲基蓝染色。将 [5] WU B Y (吴宝意), XU Y W (徐亚文), LE X X (乐晓霞), et al.
配好的水凝胶装填入注射器中(注射器的针头型号 Smart hydrogel actuators assembled via dynamic boronic ester bonds[J].
为 7 号,内径 0.7 mm),推动注射器活塞将水凝胶 Acta Polymerica Sinica (高分子学报), 2019, 50(5): 496-504.
[6] HUANG G (黄刚), ZHANG H W (张宏伟), ZHANG H H (张欢欢),
通过针头挤压而出,在 A4 纸上打出立体“3D”图 et al. Influence of graphene oxide on the rheological properties of
案(图 12),所得数字、字母线条完整,形状规则, poly(vinyl alcohl)/borate hydrogel[J]. Chinese Journal of Applied
可以长时间保持稳定。结果表明,水凝胶具有良好 Chemistry (应用化学), 2018, 35(7): 767-775.
[7] CHEN Y Y, LU K Y, SONGY H. A akin-inspired stretchable,
的剪切稀释性和可注射性,这些性质都提示该水凝 self-healing and electro-conductive hydrogel with a synergistic triple
胶可用作 3D 打印的“墨水”。 network for wearable strain sensors applied in human-motion
detection[J]. Nanomaterials, 2019, 9(12): 1737-1757.
[8] LI H Y (李海燕), ZHAO Z Z (赵志桩), CUI Y X (崔业翔).
Preparation and performance of poly(N-isopropylacrylamide)/clay
nanocomposite self-healing hydrogel[J]. China Plastics (中国塑料),
2015, 29(12): 18-22.
[9] JIANG S Q (蒋山泉), LI Q (李强), SUN X W (孙向卫), et al.
Preparationand and performance of pH sensitive(St-DVB-MAA)
hydrogels[J]. Polymer Bulletin (高分子通报), 2018, (5): 73-78.
[10] SUN J C (孙嘉辰), GAO Y (高玥). Preparation and study of
adsorbing copper ions of organic/inorganic composite self-healing
hydrogel[J]. Chemical Engineer (化学工程师), 2016, 30(7): 6-10.
图 12 水凝胶的流动性实验 [11] LIAO J E (廖家娥), LIU G Q (刘根起). Electro-stimulate response
behavior of xanthan gum/polyvinyl alcohol interpenetrating networks
Fig. 12 Fluidity test of the hydrogel
hydrogel[J]. Polymer Materials Science & Engineering (高分子材料
与科学工程), 2013, 29(4): 93-96.
3 结论 [12] QI X H (祁晓华), LI C Q (李传强), GUO C W (郭春文), et al.
Preparation and properties of γ-polyglutamic acid/attapulgite superabsorbent
(1)水凝胶实现了 P(MAA/AMPS)和 PVA 的互 composite[J]. Fine Chemicals (精细化工), 2019, 36(3): 414-420.
穿缠结,硼酸根交联赋予了水凝胶三维立体网络结 [13] JIANG S Q (蒋山泉), LING L X (凌立新), HU C B (胡承波), et al.
Preparation and performance of anti-freeze P(AM/MAA) hydrogel
构。 with pH sensitivity[J]. New Chemical Materials (化工新型材料),
(2)水凝胶 P(MAA/AMPS)-PVA 具有 pH 敏感 2019, 47(7): 197-200.
性,亲水基团的氢键使水凝胶体积发生胀缩,硼酸 [14] DING X Y (丁晓亚), WANG Y (王宇), LI G (李杲), et al. Iminoboronate
ester cross-linked hydrogels with injectable, self-healing and multi-
根交联对水凝胶体积胀缩有一定的抑制作用。 responsive properties[J]. Acta Polymerica Sinica (高分子学报), 2019,
(3)动态交联机制赋予水凝胶显著的剪切稀释 50(5): 505-514.
[15] WANG X C (王学川), GAN T (甘婷), ZHU X (朱兴). Classification
及可注射性,表明该水凝胶可以作为 3D 打印的“墨
of functional gelatin-based hydrogels and research progress[J]. Fine
水”,具备作为 3D 打印材料的潜质。 Chemicals (精细化工), 2021, 38(2): 217-225,248.