전분은 친환경적인 천연자원이다. 건축 재료로서 활용 가능한 전분-아크릴 코팅졸을 유화중합으로 합성하였다. 제조된 합성물은 IR, $^1H$-NMR을 이용하여 구조를 분석하였고, X-ray Diffraction, 발포 시험, 백색도 시험, 광택도 시험과 인장 강도를 측정을 통하여 물리적 특성을 조사하였다. 전분-아크릴 폴리머 메트릭스에서 전분의 무정형 상태는 XRD결과로 알 수 있었다. 에멀젼을 60% $CaCO_3$ 수용액과 1%, 3%, 5% 발포제와 배합하였다. 그 결과 전분과 발포제의 양이 증가할수록 발포율이 증가하였다. 전분과 발포제의 양이 증가하면 인장 강도가 증가하였다. 그러나 전분과 발포제의 증가로 인해 백색도와 광택도는 감소하였다.
전분은 친환경적인 천연자원이다. 건축 재료로서 활용 가능한 전분-아크릴 코팅졸을 유화중합으로 합성하였다. 제조된 합성물은 IR, $^1H$-NMR을 이용하여 구조를 분석하였고, X-ray Diffraction, 발포 시험, 백색도 시험, 광택도 시험과 인장 강도를 측정을 통하여 물리적 특성을 조사하였다. 전분-아크릴 폴리머 메트릭스에서 전분의 무정형 상태는 XRD결과로 알 수 있었다. 에멀젼을 60% $CaCO_3$ 수용액과 1%, 3%, 5% 발포제와 배합하였다. 그 결과 전분과 발포제의 양이 증가할수록 발포율이 증가하였다. 전분과 발포제의 양이 증가하면 인장 강도가 증가하였다. 그러나 전분과 발포제의 증가로 인해 백색도와 광택도는 감소하였다.
Starch is an environmental-friendly natural source, more interests are attracted to use starch for synthesis of composites and coating sols. Starch-acrylic coating sols for architectural materials were synthesized by emulsion polymerization. The structures of synthesized materials were characterized...
Starch is an environmental-friendly natural source, more interests are attracted to use starch for synthesis of composites and coating sols. Starch-acrylic coating sols for architectural materials were synthesized by emulsion polymerization. The structures of synthesized materials were characterized by using Infrared spectra, $^1H$-NMR spectra, and physical characteristics were investigated by X-ray diffraction, foaming test, whiteness test, gloss test and tensile strength test. XRD results showed that starch in starch-acrylic copolymer matrix was in an amorphous state. Starch-acrylic emulsion was compounded with 1%, 3%, 5% foaming agent (n-pentane) and 60% $CaCO_3$ solution. The results showed that starch and foaming agent could increase the foamability. Tensile strength increased with the enhancement of starch and foaming agent concentration. But whiteness and gloss decreased with increase of starch and foaming agent concentration.
Starch is an environmental-friendly natural source, more interests are attracted to use starch for synthesis of composites and coating sols. Starch-acrylic coating sols for architectural materials were synthesized by emulsion polymerization. The structures of synthesized materials were characterized by using Infrared spectra, $^1H$-NMR spectra, and physical characteristics were investigated by X-ray diffraction, foaming test, whiteness test, gloss test and tensile strength test. XRD results showed that starch in starch-acrylic copolymer matrix was in an amorphous state. Starch-acrylic emulsion was compounded with 1%, 3%, 5% foaming agent (n-pentane) and 60% $CaCO_3$ solution. The results showed that starch and foaming agent could increase the foamability. Tensile strength increased with the enhancement of starch and foaming agent concentration. But whiteness and gloss decreased with increase of starch and foaming agent concentration.
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문제 정의
The effect of starch and foaming agent content on foamability, whiteness, gloss and mechanical property were investigated, too. The aim of this research was to synthesis environmental-friendly starch-acrylic coating sols for architectural materials to replace the former environmental-unfriendly silk wallpapers. This research will advance the knowledge how to synthesis of wallpaer using environmental-friendly starch.
The aim of this research was to synthesis environmental-friendly starch-acrylic coating sols for architectural materials to replace the former environmental-unfriendly silk wallpapers. This research will advance the knowledge how to synthesis of wallpaer using environmental-friendly starch.
가설 설정
Grafting copolymerization was conducted with the different content (0%, 10%, 20%, 30%, 40%) starch paste, acrylic monomers and initiator APS at 80 ℃ for 3 hours. The recipe of polymerization was shown in Table 1. The reaction was performed under a continuous flow of oxygen free nitrogen gas. After reacting 3 hours, the starch-acrylic emulsion was polymerized.
제안 방법
The surfactant DBS-Na was slowly added into the suspension within 20 minutes. Grafting copolymerization was conducted with the different content (0%, 10%, 20%, 30%, 40%) starch paste, acrylic monomers and initiator APS at 80 ℃ for 3 hours. The recipe of polymerization was shown in Table 1.
In this research, the starch was modified by direct grafting of acrylic polymeric chains onto its backbone by emulsion polymerization. The structure of starch-acrylic coating sols was investigated.
To investigate the effect of grafting starch on the structure of starch-acrylic coating sols, IR, 1H-NMR spectra and XRD patterns of acrylic copolymer and starch-acrylic coating sols were obtained.
X-ray diffraction analysis was performed by using Rigaku D/MAX-2200V X-ray Diffractometer-Cu tube and Graphite Monochromator at a room temperature in a 2θ range of 0° ～80° .
대상 데이터
α-Amylase for starch dissolved enzyme was supplied from Novozymes Company. Ethyl acrylate (EA), methyl methacrylate (MMA), acrylic acid (AA), butyl acrylate (BA), dodecyl benzene sulfonic acid sodium salt 50% (DBS-Na), ammonium persulfate (APS) and ammonia water all were supplied from Aldrich company. Other reagents and ingredients were commercially available and were used as received.
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