奈米二氧化矽對乳液型壓克力黏膠性能提升之研究

Improvement of Properties of Latex Acrylic Adhesives by Silica Nanoparticles

李志鴻(Chih-Humg Lee)

指導教授 ： 許世興

朝陽科技大學/理工學院/應用化學系/碩士(2010年)

摘要

本研究之目的主要是在乳液型壓克力感壓性黏著劑的聚合反應過程中將水解後的奈米二氧化矽加入，藉由田口品質工程法進行乳化聚合改善乳液型壓克力感壓性黏著劑，求出最佳反應條件，並探討添加奈米二氧化矽對性能提升之影響。
由影響乳化聚合反應中選出四個可控因子，二氧化矽添加量、攪拌速度、乳化劑量與charge次數，每個因子選擇三水準，並以L9直交表作為實驗配置。藉由實驗觀察各因子對於物理性質的影響，以傅立葉紅外線吸收光譜儀(FT-IR)與掃描式電子顯微鏡(SEM)觀察水解奈米二氧化矽與乳化聚合乳液型壓克力感壓膠表面形態。此外將添加奈米二氧化矽之乳液型壓克力感壓膠塗膜製成商標紙，並進行物理性質及耐溫測試。
實驗結果顯示最佳配方為A1 (二氧化矽添加量)、B3 (攪拌速度)、C3 (乳化劑量)、D3(charge次數)。與空白組相比較，於初期力與黏著力並無太大影響，但對於保持力與高溫保持力皆有所提升。保持力由原本2hr提升至24hr以上；高溫保持力由原本不足10min提升至24小時以上。添加奈米二氧化矽對於乳液型壓克力黏膠之凝集強度與耐溫性能提升效果較明顯。

關鍵字

感壓膠 ； 乳化聚合 ； 田口法 ； 奈米二氧化矽

並列摘要

In order to improve the properties of acryl adhesive, applying nano-silica hydrolysis in the polymerization of latex acrylic pressure-sensitive adhesive with Taguchi quality engineering method for emulsion polymerization of acrylic latex sense of modification compressive adhesive was examined to find the optimum reaction conditions, and to study the effect on its performance. Emulsion polymerization was controlled by four factors: the amount of silica added, stirring rate, emulsifier quantity, and charge number, each of which has three levels. We observed the hydrolysis of nano-silica and the water-based acrylic emulsion polymer adhesive surface morphology with Fourier transform infrared absorption spectroscopy (FT-IR) and scanning electron microscopy (SEM) observation the. Furthermore, manufacturing the SiO2-modified water-based acryl pressure-sensitive adhesive into the trademark paper, and physical properties and heat resistance test were examined. The results showed that the best formula for the A1(SiO2 dosage), B3 (stirring speed), C3 (emulsifier volume), D3 (charge number). The initial tack and peeling adhesion was not affected, but the holding power and heat holding power were improved. The holding power arose from the original 2hr to more than 24hr; heat holding power from less than 10min from the original to upgrade to more than 24 hours. Adding nano-silica for the aggregation of water-based acrylic adhesives strength and temperature performance results more apparent.

並列關鍵字

Pressure-sensitive adhesive ； Silica Nanoparticles ； Emulsion polymerization ； Taguchi quality engineering method

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